1729 lines
66 KiB
Java
1729 lines
66 KiB
Java
/*
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* Copyright (C) 2006 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.graphics.drawable;
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import android.annotation.AttrRes;
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import android.annotation.ColorInt;
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import android.annotation.IntRange;
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import android.annotation.NonNull;
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import android.annotation.Nullable;
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import android.compat.annotation.UnsupportedAppUsage;
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import android.content.pm.ActivityInfo.Config;
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import android.content.res.ColorStateList;
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import android.content.res.Resources;
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import android.content.res.Resources.Theme;
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import android.content.res.TypedArray;
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import android.graphics.Bitmap;
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import android.graphics.BitmapFactory;
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import android.graphics.BlendMode;
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import android.graphics.BlendModeColorFilter;
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import android.graphics.Canvas;
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import android.graphics.Color;
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import android.graphics.ColorFilter;
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import android.graphics.ImageDecoder;
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import android.graphics.Insets;
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import android.graphics.NinePatch;
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import android.graphics.Outline;
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import android.graphics.PixelFormat;
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import android.graphics.PorterDuff;
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import android.graphics.PorterDuff.Mode;
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import android.graphics.PorterDuffColorFilter;
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import android.graphics.Rect;
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import android.graphics.Region;
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import android.graphics.Xfermode;
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import android.os.Build;
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import android.os.Trace;
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import android.util.AttributeSet;
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import android.util.DisplayMetrics;
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import android.util.Log;
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import android.util.StateSet;
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import android.util.TypedValue;
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import android.util.Xml;
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import android.view.View;
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import com.android.internal.R;
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import org.xmlpull.v1.XmlPullParser;
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import org.xmlpull.v1.XmlPullParserException;
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import java.io.FileInputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.lang.ref.WeakReference;
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import java.util.Arrays;
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/**
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* A Drawable is a general abstraction for "something that can be drawn." Most
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* often you will deal with Drawable as the type of resource retrieved for
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* drawing things to the screen; the Drawable class provides a generic API for
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* dealing with an underlying visual resource that may take a variety of forms.
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* Unlike a {@link android.view.View}, a Drawable does not have any facility to
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* receive events or otherwise interact with the user.
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*
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* <p>In addition to simple drawing, Drawable provides a number of generic
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* mechanisms for its client to interact with what is being drawn:
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*
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* <ul>
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* <li> The {@link #setBounds} method <var>must</var> be called to tell the
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* Drawable where it is drawn and how large it should be. All Drawables
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* should respect the requested size, often simply by scaling their
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* imagery. A client can find the preferred size for some Drawables with
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* the {@link #getIntrinsicHeight} and {@link #getIntrinsicWidth} methods.
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*
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* <li> The {@link #getPadding} method can return from some Drawables
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* information about how to frame content that is placed inside of them.
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* For example, a Drawable that is intended to be the frame for a button
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* widget would need to return padding that correctly places the label
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* inside of itself.
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*
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* <li> The {@link #setState} method allows the client to tell the Drawable
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* in which state it is to be drawn, such as "focused", "selected", etc.
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* Some drawables may modify their imagery based on the selected state.
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*
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* <li> The {@link #setLevel} method allows the client to supply a single
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* continuous controller that can modify the Drawable is displayed, such as
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* a battery level or progress level. Some drawables may modify their
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* imagery based on the current level.
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*
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* <li> A Drawable can perform animations by calling back to its client
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* through the {@link Callback} interface. All clients should support this
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* interface (via {@link #setCallback}) so that animations will work. A
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* simple way to do this is through the system facilities such as
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* {@link android.view.View#setBackground(Drawable)} and
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* {@link android.widget.ImageView}.
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* </ul>
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*
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* Though usually not visible to the application, Drawables may take a variety
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* of forms:
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*
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* <ul>
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* <li> <b>Bitmap</b>: the simplest Drawable, a PNG or JPEG image.
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* <li> <b>Nine Patch</b>: an extension to the PNG format allows it to
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* specify information about how to stretch it and place things inside of
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* it.
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* <li><b>Vector</b>: a drawable defined in an XML file as a set of points,
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* lines, and curves along with its associated color information. This type
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* of drawable can be scaled without loss of display quality.
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* <li> <b>Shape</b>: contains simple drawing commands instead of a raw
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* bitmap, allowing it to resize better in some cases.
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* <li> <b>Layers</b>: a compound drawable, which draws multiple underlying
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* drawables on top of each other.
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* <li> <b>States</b>: a compound drawable that selects one of a set of
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* drawables based on its state.
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* <li> <b>Levels</b>: a compound drawable that selects one of a set of
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* drawables based on its level.
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* <li> <b>Scale</b>: a compound drawable with a single child drawable,
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* whose overall size is modified based on the current level.
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* </ul>
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*
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* <a name="Custom"></a>
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* <h3>Custom drawables</h3>
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*
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* <p>
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* All versions of Android allow the Drawable class to be extended and used at
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* run time in place of framework-provided drawable classes. Starting in
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* {@link android.os.Build.VERSION_CODES#N API 24}, custom drawables classes
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* may also be used in XML.
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* <p>
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* <strong>Note:</strong> Custom drawable classes are only accessible from
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* within your application package. Other applications will not be able to load
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* them.
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* <p>
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* At a minimum, custom drawable classes must implement the abstract methods on
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* Drawable and should override the {@link Drawable#draw(Canvas)} method to
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* draw content.
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* <p>
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* Custom drawables classes may be used in XML in multiple ways:
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* <ul>
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* <li>
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* Using the fully-qualified class name as the XML element name. For
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* this method, the custom drawable class must be a public top-level
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* class.
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* <pre>
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* <com.myapp.MyCustomDrawable xmlns:android="http://schemas.android.com/apk/res/android"
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* android:color="#ffff0000" />
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* </pre>
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* </li>
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* <li>
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* Using <em>drawable</em> as the XML element name and specifying the
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* fully-qualified class name from the <em>class</em> attribute. This
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* method may be used for both public top-level classes and public
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* static inner classes.
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* <pre>
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* <drawable xmlns:android="http://schemas.android.com/apk/res/android"
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* class="com.myapp.MyTopLevelClass$InnerCustomDrawable"
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* android:color="#ffff0000" />
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* </pre>
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* </li>
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* </ul>
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*
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* <div class="special reference">
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* <h3>Developer Guides</h3>
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* <p>For more information about how to use drawables, read the
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* <a href="{@docRoot}guide/topics/graphics/2d-graphics.html">Canvas and Drawables</a> developer
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* guide. For information and examples of creating drawable resources (XML or bitmap files that
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* can be loaded in code), read the
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* <a href="{@docRoot}guide/topics/resources/drawable-resource.html">Drawable Resources</a>
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* document.</p></div>
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*/
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public abstract class Drawable {
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private static final Rect ZERO_BOUNDS_RECT = new Rect();
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static final PorterDuff.Mode DEFAULT_TINT_MODE = PorterDuff.Mode.SRC_IN;
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static final BlendMode DEFAULT_BLEND_MODE = BlendMode.SRC_IN;
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private int[] mStateSet = StateSet.WILD_CARD;
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private int mLevel = 0;
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private @Config int mChangingConfigurations = 0;
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private Rect mBounds = ZERO_BOUNDS_RECT; // lazily becomes a new Rect()
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@UnsupportedAppUsage
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private WeakReference<Callback> mCallback = null;
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private boolean mVisible = true;
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private int mLayoutDirection;
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/**
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* The source density to use when looking up resources using
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* {@link Resources#getDrawableForDensity(int, int, Theme)}. A value of 0 means there is no
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* override and the system density will be used.
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*
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* NOTE(adamlesinski): This is transient state used to get around the public API that does not
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* account for source density overrides. Custom drawables implemented by developers do not need
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* to be aware of the source density override, as it is only used by Launcher to load higher
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* resolution icons from external Resources packages, which do not execute custom code.
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* This is all to support the {@link Resources#getDrawableForDensity(int, int, Theme)} API.
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*
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* @hide
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*/
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@UnsupportedAppUsage
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protected int mSrcDensityOverride = 0;
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/**
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* Flag used to break the recursive loop between setTintBlendMode(PorterDuff.Mode) and
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* setTintBlendMode(BlendMode) as each default implementation invokes the other in order to
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* support new use cases that utilize the new blending modes as well as support the legacy
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* use cases. This flag tracks that {@link #setTintBlendMode(BlendMode)} is only invoked once
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* per invocation.
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*/
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private boolean mSetBlendModeInvoked = false;
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/**
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* Flag used to break the recursive loop between setTintBlendMode(PorterDuff.Mode) and
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* setTintBlendMode(BlendMode) as each default implementation invokes the other in order to
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* support new use cases that utilize the new blending modes as well as support the legacy
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* use cases. This flag tracks that {@link #setTintMode(Mode)} is only invoked once
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* per invocation;
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*/
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private boolean mSetTintModeInvoked = false;
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/**
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* Draw in its bounds (set via setBounds) respecting optional effects such
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* as alpha (set via setAlpha) and color filter (set via setColorFilter).
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*
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* @param canvas The canvas to draw into
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*/
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public abstract void draw(@NonNull Canvas canvas);
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/**
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* Specify a bounding rectangle for the Drawable. This is where the drawable
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* will draw when its draw() method is called.
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*/
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public void setBounds(int left, int top, int right, int bottom) {
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Rect oldBounds = mBounds;
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if (oldBounds == ZERO_BOUNDS_RECT) {
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oldBounds = mBounds = new Rect();
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}
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if (oldBounds.left != left || oldBounds.top != top ||
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oldBounds.right != right || oldBounds.bottom != bottom) {
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if (!oldBounds.isEmpty()) {
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// first invalidate the previous bounds
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invalidateSelf();
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}
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mBounds.set(left, top, right, bottom);
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onBoundsChange(mBounds);
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}
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}
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/**
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* Specify a bounding rectangle for the Drawable. This is where the drawable
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* will draw when its draw() method is called.
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*/
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public void setBounds(@NonNull Rect bounds) {
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setBounds(bounds.left, bounds.top, bounds.right, bounds.bottom);
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}
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/**
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* Return a copy of the drawable's bounds in the specified Rect (allocated
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* by the caller). The bounds specify where this will draw when its draw()
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* method is called.
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*
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* @param bounds Rect to receive the drawable's bounds (allocated by the
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* caller).
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*/
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public final void copyBounds(@NonNull Rect bounds) {
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bounds.set(mBounds);
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}
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/**
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* Return a copy of the drawable's bounds in a new Rect. This returns the
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* same values as getBounds(), but the returned object is guaranteed to not
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* be changed later by the drawable (i.e. it retains no reference to this
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* rect). If the caller already has a Rect allocated, call copyBounds(rect).
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*
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* @return A copy of the drawable's bounds
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*/
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public final @NonNull Rect copyBounds() {
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return new Rect(mBounds);
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}
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/**
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* Return the drawable's bounds Rect. Note: for efficiency, the returned
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* object may be the same object stored in the drawable (though this is not
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* guaranteed), so if a persistent copy of the bounds is needed, call
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* copyBounds(rect) instead.
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* You should also not change the object returned by this method as it may
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* be the same object stored in the drawable.
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*
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* @return The bounds of the drawable (which may change later, so caller
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* beware). DO NOT ALTER the returned object as it may change the
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* stored bounds of this drawable.
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*
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* @see #copyBounds()
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* @see #copyBounds(android.graphics.Rect)
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*/
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public final @NonNull Rect getBounds() {
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if (mBounds == ZERO_BOUNDS_RECT) {
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mBounds = new Rect();
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}
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return mBounds;
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}
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/**
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* Return the drawable's dirty bounds Rect. Note: for efficiency, the
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* returned object may be the same object stored in the drawable (though
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* this is not guaranteed).
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* <p>
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* By default, this returns the full drawable bounds. Custom drawables may
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* override this method to perform more precise invalidation.
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*
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* @return The dirty bounds of this drawable
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*/
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public @NonNull Rect getDirtyBounds() {
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return getBounds();
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}
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/**
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* Set a mask of the configuration parameters for which this drawable
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* may change, requiring that it be re-created.
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*
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* @param configs A mask of the changing configuration parameters, as
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* defined by {@link android.content.pm.ActivityInfo}.
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*
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* @see android.content.pm.ActivityInfo
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*/
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public void setChangingConfigurations(@Config int configs) {
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mChangingConfigurations = configs;
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}
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/**
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* Return a mask of the configuration parameters for which this drawable
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* may change, requiring that it be re-created. The default implementation
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* returns whatever was provided through
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* {@link #setChangingConfigurations(int)} or 0 by default. Subclasses
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* may extend this to or in the changing configurations of any other
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* drawables they hold.
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*
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* @return Returns a mask of the changing configuration parameters, as
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* defined by {@link android.content.pm.ActivityInfo}.
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*
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* @see android.content.pm.ActivityInfo
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*/
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public @Config int getChangingConfigurations() {
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return mChangingConfigurations;
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}
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/**
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* Set to true to have the drawable dither its colors when drawn to a
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* device with fewer than 8-bits per color component.
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*
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* @see android.graphics.Paint#setDither(boolean);
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* @deprecated This property is ignored.
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*/
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@Deprecated
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public void setDither(boolean dither) {}
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/**
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* Set to true to have the drawable filter its bitmaps with bilinear
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* sampling when they are scaled or rotated.
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*
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* <p>This can improve appearance when bitmaps are rotated. If the drawable
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* does not use bitmaps, this call is ignored.</p>
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*
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* @see #isFilterBitmap()
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* @see android.graphics.Paint#setFilterBitmap(boolean);
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*/
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public void setFilterBitmap(boolean filter) {}
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/**
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* @return whether this drawable filters its bitmaps
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* @see #setFilterBitmap(boolean)
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*/
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public boolean isFilterBitmap() {
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return false;
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}
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/**
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* Implement this interface if you want to create an animated drawable that
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* extends {@link android.graphics.drawable.Drawable Drawable}.
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* Upon retrieving a drawable, use
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* {@link Drawable#setCallback(android.graphics.drawable.Drawable.Callback)}
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* to supply your implementation of the interface to the drawable; it uses
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* this interface to schedule and execute animation changes.
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*/
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public interface Callback {
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/**
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* Called when the drawable needs to be redrawn. A view at this point
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* should invalidate itself (or at least the part of itself where the
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* drawable appears).
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*
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* @param who The drawable that is requesting the update.
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*/
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void invalidateDrawable(@NonNull Drawable who);
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/**
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* A Drawable can call this to schedule the next frame of its
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* animation. An implementation can generally simply call
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* {@link android.os.Handler#postAtTime(Runnable, Object, long)} with
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* the parameters <var>(what, who, when)</var> to perform the
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* scheduling.
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*
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* @param who The drawable being scheduled.
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* @param what The action to execute.
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* @param when The time (in milliseconds) to run. The timebase is
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* {@link android.os.SystemClock#uptimeMillis}
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*/
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void scheduleDrawable(@NonNull Drawable who, @NonNull Runnable what, long when);
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/**
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* A Drawable can call this to unschedule an action previously
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* scheduled with {@link #scheduleDrawable}. An implementation can
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* generally simply call
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* {@link android.os.Handler#removeCallbacks(Runnable, Object)} with
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* the parameters <var>(what, who)</var> to unschedule the drawable.
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*
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* @param who The drawable being unscheduled.
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* @param what The action being unscheduled.
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*/
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void unscheduleDrawable(@NonNull Drawable who, @NonNull Runnable what);
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}
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/**
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* Bind a {@link Callback} object to this Drawable. Required for clients
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* that want to support animated drawables.
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*
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* @param cb The client's Callback implementation.
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*
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* @see #getCallback()
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*/
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public final void setCallback(@Nullable Callback cb) {
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mCallback = cb != null ? new WeakReference<>(cb) : null;
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}
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/**
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* Return the current {@link Callback} implementation attached to this
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* Drawable.
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*
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* @return A {@link Callback} instance or null if no callback was set.
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*
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* @see #setCallback(android.graphics.drawable.Drawable.Callback)
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*/
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public @Nullable Callback getCallback() {
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return mCallback != null ? mCallback.get() : null;
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}
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/**
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* Use the current {@link Callback} implementation to have this Drawable
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* redrawn. Does nothing if there is no Callback attached to the
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* Drawable.
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*
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* @see Callback#invalidateDrawable
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* @see #getCallback()
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* @see #setCallback(android.graphics.drawable.Drawable.Callback)
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*/
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public void invalidateSelf() {
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final Callback callback = getCallback();
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if (callback != null) {
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callback.invalidateDrawable(this);
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}
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}
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/**
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* Use the current {@link Callback} implementation to have this Drawable
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* scheduled. Does nothing if there is no Callback attached to the
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* Drawable.
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*
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* @param what The action being scheduled.
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* @param when The time (in milliseconds) to run.
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*
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* @see Callback#scheduleDrawable
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*/
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public void scheduleSelf(@NonNull Runnable what, long when) {
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final Callback callback = getCallback();
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|
if (callback != null) {
|
|
callback.scheduleDrawable(this, what, when);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Use the current {@link Callback} implementation to have this Drawable
|
|
* unscheduled. Does nothing if there is no Callback attached to the
|
|
* Drawable.
|
|
*
|
|
* @param what The runnable that you no longer want called.
|
|
*
|
|
* @see Callback#unscheduleDrawable
|
|
*/
|
|
public void unscheduleSelf(@NonNull Runnable what) {
|
|
final Callback callback = getCallback();
|
|
if (callback != null) {
|
|
callback.unscheduleDrawable(this, what);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns the resolved layout direction for this Drawable.
|
|
*
|
|
* @return One of {@link android.view.View#LAYOUT_DIRECTION_LTR},
|
|
* {@link android.view.View#LAYOUT_DIRECTION_RTL}
|
|
* @see #setLayoutDirection(int)
|
|
*/
|
|
public @View.ResolvedLayoutDir int getLayoutDirection() {
|
|
return mLayoutDirection;
|
|
}
|
|
|
|
/**
|
|
* Set the layout direction for this drawable. Should be a resolved
|
|
* layout direction, as the Drawable has no capacity to do the resolution on
|
|
* its own.
|
|
*
|
|
* @param layoutDirection the resolved layout direction for the drawable,
|
|
* either {@link android.view.View#LAYOUT_DIRECTION_LTR}
|
|
* or {@link android.view.View#LAYOUT_DIRECTION_RTL}
|
|
* @return {@code true} if the layout direction change has caused the
|
|
* appearance of the drawable to change such that it needs to be
|
|
* re-drawn, {@code false} otherwise
|
|
* @see #getLayoutDirection()
|
|
*/
|
|
public final boolean setLayoutDirection(@View.ResolvedLayoutDir int layoutDirection) {
|
|
if (mLayoutDirection != layoutDirection) {
|
|
mLayoutDirection = layoutDirection;
|
|
return onLayoutDirectionChanged(layoutDirection);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Called when the drawable's resolved layout direction changes.
|
|
*
|
|
* @param layoutDirection the new resolved layout direction
|
|
* @return {@code true} if the layout direction change has caused the
|
|
* appearance of the drawable to change such that it needs to be
|
|
* re-drawn, {@code false} otherwise
|
|
* @see #setLayoutDirection(int)
|
|
*/
|
|
public boolean onLayoutDirectionChanged(@View.ResolvedLayoutDir int layoutDirection) {
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Specify an alpha value for the drawable. 0 means fully transparent, and
|
|
* 255 means fully opaque.
|
|
*/
|
|
public abstract void setAlpha(@IntRange(from=0,to=255) int alpha);
|
|
|
|
/**
|
|
* Gets the current alpha value for the drawable. 0 means fully transparent,
|
|
* 255 means fully opaque. This method is implemented by
|
|
* Drawable subclasses and the value returned is specific to how that class treats alpha.
|
|
* The default return value is 255 if the class does not override this method to return a value
|
|
* specific to its use of alpha.
|
|
*/
|
|
public @IntRange(from=0,to=255) int getAlpha() {
|
|
return 0xFF;
|
|
}
|
|
|
|
/**
|
|
* @hide
|
|
*
|
|
* Internal-only method for setting xfermode on certain supported drawables.
|
|
*
|
|
* Should not be made public since the layers and drawing area with which
|
|
* Drawables draw is private implementation detail, and not something apps
|
|
* should rely upon.
|
|
*/
|
|
public void setXfermode(@Nullable Xfermode mode) {
|
|
// Base implementation drops it on the floor for compatibility. Whee!
|
|
}
|
|
|
|
/**
|
|
* Specify an optional color filter for the drawable.
|
|
* <p>
|
|
* If a Drawable has a ColorFilter, each output pixel of the Drawable's
|
|
* drawing contents will be modified by the color filter before it is
|
|
* blended onto the render target of a Canvas.
|
|
* </p>
|
|
* <p>
|
|
* Pass {@code null} to remove any existing color filter.
|
|
* </p>
|
|
* <p class="note"><strong>Note:</strong> Setting a non-{@code null} color
|
|
* filter disables {@link #setTintList(ColorStateList) tint}.
|
|
* </p>
|
|
*
|
|
* @param colorFilter The color filter to apply, or {@code null} to remove the
|
|
* existing color filter
|
|
*/
|
|
public abstract void setColorFilter(@Nullable ColorFilter colorFilter);
|
|
|
|
/**
|
|
* Specify a color and Porter-Duff mode to be the color filter for this
|
|
* drawable.
|
|
* <p>
|
|
* Convenience for {@link #setColorFilter(ColorFilter)} which constructs a
|
|
* {@link PorterDuffColorFilter}.
|
|
* </p>
|
|
* <p class="note"><strong>Note:</strong> Setting a color filter disables
|
|
* {@link #setTintList(ColorStateList) tint}.
|
|
* </p>
|
|
*
|
|
* @see #setColorFilter(ColorFilter)
|
|
* @deprecated use {@link #setColorFilter(ColorFilter)} with an instance
|
|
* of {@link android.graphics.BlendModeColorFilter}
|
|
*/
|
|
@Deprecated
|
|
public void setColorFilter(@ColorInt int color, @NonNull PorterDuff.Mode mode) {
|
|
if (getColorFilter() instanceof PorterDuffColorFilter) {
|
|
PorterDuffColorFilter existing = (PorterDuffColorFilter) getColorFilter();
|
|
if (existing.getColor() == color && existing.getMode() == mode) {
|
|
return;
|
|
}
|
|
}
|
|
setColorFilter(new PorterDuffColorFilter(color, mode));
|
|
}
|
|
|
|
/**
|
|
* Specifies tint color for this drawable.
|
|
* <p>
|
|
* A Drawable's drawing content will be blended together with its tint
|
|
* before it is drawn to the screen. This functions similarly to
|
|
* {@link #setColorFilter(int, PorterDuff.Mode)}.
|
|
* </p>
|
|
* <p>
|
|
* To clear the tint, pass {@code null} to
|
|
* {@link #setTintList(ColorStateList)}.
|
|
* </p>
|
|
* <p class="note"><strong>Note:</strong> Setting a color filter via
|
|
* {@link #setColorFilter(ColorFilter)} or
|
|
* {@link #setColorFilter(int, PorterDuff.Mode)} overrides tint.
|
|
* </p>
|
|
*
|
|
* @param tintColor Color to use for tinting this drawable
|
|
* @see #setTintList(ColorStateList)
|
|
* @see #setTintMode(PorterDuff.Mode)
|
|
* @see #setTintBlendMode(BlendMode)
|
|
*/
|
|
public void setTint(@ColorInt int tintColor) {
|
|
setTintList(ColorStateList.valueOf(tintColor));
|
|
}
|
|
|
|
/**
|
|
* Specifies tint color for this drawable as a color state list.
|
|
* <p>
|
|
* A Drawable's drawing content will be blended together with its tint
|
|
* before it is drawn to the screen. This functions similarly to
|
|
* {@link #setColorFilter(int, PorterDuff.Mode)}.
|
|
* </p>
|
|
* <p class="note"><strong>Note:</strong> Setting a color filter via
|
|
* {@link #setColorFilter(ColorFilter)} or
|
|
* {@link #setColorFilter(int, PorterDuff.Mode)} overrides tint.
|
|
* </p>
|
|
*
|
|
* @param tint Color state list to use for tinting this drawable, or
|
|
* {@code null} to clear the tint
|
|
* @see #setTint(int)
|
|
* @see #setTintMode(PorterDuff.Mode)
|
|
* @see #setTintBlendMode(BlendMode)
|
|
*/
|
|
public void setTintList(@Nullable ColorStateList tint) {}
|
|
|
|
/**
|
|
* Specifies a tint blending mode for this drawable.
|
|
* <p>
|
|
* Defines how this drawable's tint color should be blended into the drawable
|
|
* before it is drawn to screen. Default tint mode is {@link PorterDuff.Mode#SRC_IN}.
|
|
* </p>
|
|
* <p class="note"><strong>Note:</strong> Setting a color filter via
|
|
* {@link #setColorFilter(ColorFilter)} or
|
|
* {@link #setColorFilter(int, PorterDuff.Mode)} overrides tint.
|
|
* </p>
|
|
*
|
|
* @param tintMode A Porter-Duff blending mode to apply to the drawable, a value of null sets
|
|
* the default Porter-Diff blending mode value
|
|
* of {@link PorterDuff.Mode#SRC_IN}
|
|
* @see #setTint(int)
|
|
* @see #setTintList(ColorStateList)
|
|
*/
|
|
public void setTintMode(@Nullable PorterDuff.Mode tintMode) {
|
|
if (!mSetTintModeInvoked) {
|
|
mSetTintModeInvoked = true;
|
|
BlendMode mode = tintMode != null ? BlendMode.fromValue(tintMode.nativeInt) : null;
|
|
setTintBlendMode(mode != null ? mode : Drawable.DEFAULT_BLEND_MODE);
|
|
mSetTintModeInvoked = false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Specifies a tint blending mode for this drawable.
|
|
* <p>
|
|
* Defines how this drawable's tint color should be blended into the drawable
|
|
* before it is drawn to screen. Default tint mode is {@link BlendMode#SRC_IN}.
|
|
* </p>
|
|
* <p class="note"><strong>Note:</strong> Setting a color filter via
|
|
* {@link #setColorFilter(ColorFilter)}
|
|
* </p>
|
|
*
|
|
* @param blendMode BlendMode to apply to the drawable, a value of null sets the default
|
|
* blend mode value of {@link BlendMode#SRC_IN}
|
|
* @see #setTint(int)
|
|
* @see #setTintList(ColorStateList)
|
|
*/
|
|
public void setTintBlendMode(@Nullable BlendMode blendMode) {
|
|
if (!mSetBlendModeInvoked) {
|
|
mSetBlendModeInvoked = true;
|
|
PorterDuff.Mode mode = BlendMode.blendModeToPorterDuffMode(blendMode);
|
|
setTintMode(mode != null ? mode : Drawable.DEFAULT_TINT_MODE);
|
|
mSetBlendModeInvoked = false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns the current color filter, or {@code null} if none set.
|
|
*
|
|
* @return the current color filter, or {@code null} if none set
|
|
*/
|
|
public @Nullable ColorFilter getColorFilter() {
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Removes the color filter for this drawable.
|
|
*/
|
|
public void clearColorFilter() {
|
|
setColorFilter(null);
|
|
}
|
|
|
|
/**
|
|
* Specifies the hotspot's location within the drawable.
|
|
*
|
|
* @param x The X coordinate of the center of the hotspot
|
|
* @param y The Y coordinate of the center of the hotspot
|
|
*/
|
|
public void setHotspot(float x, float y) {}
|
|
|
|
/**
|
|
* Sets the bounds to which the hotspot is constrained, if they should be
|
|
* different from the drawable bounds.
|
|
*
|
|
* @param left position in pixels of the left bound
|
|
* @param top position in pixels of the top bound
|
|
* @param right position in pixels of the right bound
|
|
* @param bottom position in pixels of the bottom bound
|
|
* @see #getHotspotBounds(android.graphics.Rect)
|
|
*/
|
|
public void setHotspotBounds(int left, int top, int right, int bottom) {}
|
|
|
|
/**
|
|
* Populates {@code outRect} with the hotspot bounds.
|
|
*
|
|
* @param outRect the rect to populate with the hotspot bounds
|
|
* @see #setHotspotBounds(int, int, int, int)
|
|
*/
|
|
public void getHotspotBounds(@NonNull Rect outRect) {
|
|
outRect.set(getBounds());
|
|
}
|
|
|
|
/**
|
|
* Whether this drawable requests projection. Indicates that the
|
|
* {@link android.graphics.RenderNode} this Drawable will draw into should be drawn immediately
|
|
* after the closest ancestor RenderNode containing a projection receiver.
|
|
*
|
|
* @see android.graphics.RenderNode#setProjectBackwards(boolean)
|
|
*/
|
|
public boolean isProjected() {
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Indicates whether this drawable will change its appearance based on
|
|
* state. Clients can use this to determine whether it is necessary to
|
|
* calculate their state and call setState.
|
|
*
|
|
* @return True if this drawable changes its appearance based on state,
|
|
* false otherwise.
|
|
* @see #setState(int[])
|
|
*/
|
|
public boolean isStateful() {
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Indicates whether this drawable has at least one state spec explicitly
|
|
* specifying {@link android.R.attr#state_focused}.
|
|
*
|
|
* <p>Note: A View uses a {@link Drawable} instance as its background and it
|
|
* changes its appearance based on a state. On keyboard devices, it should
|
|
* specify its {@link android.R.attr#state_focused} to make sure the user
|
|
* knows which view is holding the focus.</p>
|
|
*
|
|
* @return {@code true} if {@link android.R.attr#state_focused} is specified
|
|
* for this drawable.
|
|
*/
|
|
public boolean hasFocusStateSpecified() {
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Specify a set of states for the drawable. These are use-case specific,
|
|
* so see the relevant documentation. As an example, the background for
|
|
* widgets like Button understand the following states:
|
|
* [{@link android.R.attr#state_focused},
|
|
* {@link android.R.attr#state_pressed}].
|
|
*
|
|
* <p>If the new state you are supplying causes the appearance of the
|
|
* Drawable to change, then it is responsible for calling
|
|
* {@link #invalidateSelf} in order to have itself redrawn, <em>and</em>
|
|
* true will be returned from this function.
|
|
*
|
|
* <p>Note: The Drawable holds a reference on to <var>stateSet</var>
|
|
* until a new state array is given to it, so you must not modify this
|
|
* array during that time.</p>
|
|
*
|
|
* @param stateSet The new set of states to be displayed.
|
|
*
|
|
* @return Returns true if this change in state has caused the appearance
|
|
* of the Drawable to change (hence requiring an invalidate), otherwise
|
|
* returns false.
|
|
*/
|
|
public boolean setState(@NonNull final int[] stateSet) {
|
|
if (!Arrays.equals(mStateSet, stateSet)) {
|
|
mStateSet = stateSet;
|
|
return onStateChange(stateSet);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Describes the current state, as a union of primitive states, such as
|
|
* {@link android.R.attr#state_focused},
|
|
* {@link android.R.attr#state_selected}, etc.
|
|
* Some drawables may modify their imagery based on the selected state.
|
|
* @return An array of resource Ids describing the current state.
|
|
*/
|
|
public @NonNull int[] getState() {
|
|
return mStateSet;
|
|
}
|
|
|
|
/**
|
|
* If this Drawable does transition animations between states, ask that
|
|
* it immediately jump to the current state and skip any active animations.
|
|
*/
|
|
public void jumpToCurrentState() {
|
|
}
|
|
|
|
/**
|
|
* @return The current drawable that will be used by this drawable. For simple drawables, this
|
|
* is just the drawable itself. For drawables that change state like
|
|
* {@link StateListDrawable} and {@link LevelListDrawable} this will be the child drawable
|
|
* currently in use.
|
|
*/
|
|
public @NonNull Drawable getCurrent() {
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Specify the level for the drawable. This allows a drawable to vary its
|
|
* imagery based on a continuous controller, for example to show progress
|
|
* or volume level.
|
|
*
|
|
* <p>If the new level you are supplying causes the appearance of the
|
|
* Drawable to change, then it is responsible for calling
|
|
* {@link #invalidateSelf} in order to have itself redrawn, <em>and</em>
|
|
* true will be returned from this function.
|
|
*
|
|
* @param level The new level, from 0 (minimum) to 10000 (maximum).
|
|
*
|
|
* @return Returns true if this change in level has caused the appearance
|
|
* of the Drawable to change (hence requiring an invalidate), otherwise
|
|
* returns false.
|
|
*/
|
|
public final boolean setLevel(@IntRange(from=0,to=10000) int level) {
|
|
if (mLevel != level) {
|
|
mLevel = level;
|
|
return onLevelChange(level);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Retrieve the current level.
|
|
*
|
|
* @return int Current level, from 0 (minimum) to 10000 (maximum).
|
|
*/
|
|
public final @IntRange(from=0,to=10000) int getLevel() {
|
|
return mLevel;
|
|
}
|
|
|
|
/**
|
|
* Set whether this Drawable is visible. This generally does not impact
|
|
* the Drawable's behavior, but is a hint that can be used by some
|
|
* Drawables, for example, to decide whether run animations.
|
|
*
|
|
* @param visible Set to true if visible, false if not.
|
|
* @param restart You can supply true here to force the drawable to behave
|
|
* as if it has just become visible, even if it had last
|
|
* been set visible. Used for example to force animations
|
|
* to restart.
|
|
*
|
|
* @return boolean Returns true if the new visibility is different than
|
|
* its previous state.
|
|
*/
|
|
public boolean setVisible(boolean visible, boolean restart) {
|
|
boolean changed = mVisible != visible;
|
|
if (changed) {
|
|
mVisible = visible;
|
|
invalidateSelf();
|
|
}
|
|
return changed;
|
|
}
|
|
|
|
public final boolean isVisible() {
|
|
return mVisible;
|
|
}
|
|
|
|
/**
|
|
* Set whether this Drawable is automatically mirrored when its layout direction is RTL
|
|
* (right-to left). See {@link android.util.LayoutDirection}.
|
|
*
|
|
* @param mirrored Set to true if the Drawable should be mirrored, false if not.
|
|
*/
|
|
public void setAutoMirrored(boolean mirrored) {
|
|
}
|
|
|
|
/**
|
|
* Tells if this Drawable will be automatically mirrored when its layout direction is RTL
|
|
* right-to-left. See {@link android.util.LayoutDirection}.
|
|
*
|
|
* @return boolean Returns true if this Drawable will be automatically mirrored.
|
|
*/
|
|
public boolean isAutoMirrored() {
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Applies the specified theme to this Drawable and its children.
|
|
*
|
|
* @param t the theme to apply
|
|
*/
|
|
public void applyTheme(@NonNull @SuppressWarnings("unused") Theme t) {
|
|
}
|
|
|
|
public boolean canApplyTheme() {
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Return the opacity/transparency of this Drawable. The returned value is
|
|
* one of the abstract format constants in
|
|
* {@link android.graphics.PixelFormat}:
|
|
* {@link android.graphics.PixelFormat#UNKNOWN},
|
|
* {@link android.graphics.PixelFormat#TRANSLUCENT},
|
|
* {@link android.graphics.PixelFormat#TRANSPARENT}, or
|
|
* {@link android.graphics.PixelFormat#OPAQUE}.
|
|
*
|
|
* <p>An OPAQUE drawable is one that draws all all content within its bounds, completely
|
|
* covering anything behind the drawable. A TRANSPARENT drawable is one that draws nothing
|
|
* within its bounds, allowing everything behind it to show through. A TRANSLUCENT drawable
|
|
* is a drawable in any other state, where the drawable will draw some, but not all,
|
|
* of the content within its bounds and at least some content behind the drawable will
|
|
* be visible. If the visibility of the drawable's contents cannot be determined, the
|
|
* safest/best return value is TRANSLUCENT.
|
|
*
|
|
* <p>Generally a Drawable should be as conservative as possible with the
|
|
* value it returns. For example, if it contains multiple child drawables
|
|
* and only shows one of them at a time, if only one of the children is
|
|
* TRANSLUCENT and the others are OPAQUE then TRANSLUCENT should be
|
|
* returned. You can use the method {@link #resolveOpacity} to perform a
|
|
* standard reduction of two opacities to the appropriate single output.
|
|
*
|
|
* <p>Note that the returned value does not necessarily take into account a
|
|
* custom alpha or color filter that has been applied by the client through
|
|
* the {@link #setAlpha} or {@link #setColorFilter} methods. Some subclasses,
|
|
* such as {@link BitmapDrawable}, {@link ColorDrawable}, and {@link GradientDrawable},
|
|
* do account for the value of {@link #setAlpha}, but the general behavior is dependent
|
|
* upon the implementation of the subclass.
|
|
*
|
|
* @deprecated This method is no longer used in graphics optimizations
|
|
*
|
|
* @return int The opacity class of the Drawable.
|
|
*
|
|
* @see android.graphics.PixelFormat
|
|
*/
|
|
@Deprecated
|
|
public abstract @PixelFormat.Opacity int getOpacity();
|
|
|
|
/**
|
|
* Return the appropriate opacity value for two source opacities. If
|
|
* either is UNKNOWN, that is returned; else, if either is TRANSLUCENT,
|
|
* that is returned; else, if either is TRANSPARENT, that is returned;
|
|
* else, OPAQUE is returned.
|
|
*
|
|
* <p>This is to help in implementing {@link #getOpacity}.
|
|
*
|
|
* @param op1 One opacity value.
|
|
* @param op2 Another opacity value.
|
|
*
|
|
* @return int The combined opacity value.
|
|
*
|
|
* @see #getOpacity
|
|
*/
|
|
public static @PixelFormat.Opacity int resolveOpacity(@PixelFormat.Opacity int op1,
|
|
@PixelFormat.Opacity int op2) {
|
|
if (op1 == op2) {
|
|
return op1;
|
|
}
|
|
if (op1 == PixelFormat.UNKNOWN || op2 == PixelFormat.UNKNOWN) {
|
|
return PixelFormat.UNKNOWN;
|
|
}
|
|
if (op1 == PixelFormat.TRANSLUCENT || op2 == PixelFormat.TRANSLUCENT) {
|
|
return PixelFormat.TRANSLUCENT;
|
|
}
|
|
if (op1 == PixelFormat.TRANSPARENT || op2 == PixelFormat.TRANSPARENT) {
|
|
return PixelFormat.TRANSPARENT;
|
|
}
|
|
return PixelFormat.OPAQUE;
|
|
}
|
|
|
|
/**
|
|
* Returns a Region representing the part of the Drawable that is completely
|
|
* transparent. This can be used to perform drawing operations, identifying
|
|
* which parts of the target will not change when rendering the Drawable.
|
|
* The default implementation returns null, indicating no transparent
|
|
* region; subclasses can optionally override this to return an actual
|
|
* Region if they want to supply this optimization information, but it is
|
|
* not required that they do so.
|
|
*
|
|
* @return Returns null if the Drawables has no transparent region to
|
|
* report, else a Region holding the parts of the Drawable's bounds that
|
|
* are transparent.
|
|
*/
|
|
public @Nullable Region getTransparentRegion() {
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Override this in your subclass to change appearance if you recognize the
|
|
* specified state.
|
|
*
|
|
* @return Returns true if the state change has caused the appearance of
|
|
* the Drawable to change (that is, it needs to be drawn), else false
|
|
* if it looks the same and there is no need to redraw it since its
|
|
* last state.
|
|
*/
|
|
protected boolean onStateChange(@NonNull int[] state) {
|
|
return false;
|
|
}
|
|
|
|
/** Override this in your subclass to change appearance if you vary based
|
|
* on level.
|
|
* @return Returns true if the level change has caused the appearance of
|
|
* the Drawable to change (that is, it needs to be drawn), else false
|
|
* if it looks the same and there is no need to redraw it since its
|
|
* last level.
|
|
*/
|
|
protected boolean onLevelChange(int level) {
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Override this in your subclass to change appearance if you vary based on
|
|
* the bounds.
|
|
*/
|
|
protected void onBoundsChange(@NonNull Rect bounds) {
|
|
// Stub method.
|
|
}
|
|
|
|
/**
|
|
* Returns the drawable's intrinsic width.
|
|
* <p>
|
|
* Intrinsic width is the width at which the drawable would like to be laid
|
|
* out, including any inherent padding. If the drawable has no intrinsic
|
|
* width, such as a solid color, this method returns -1.
|
|
*
|
|
* @return the intrinsic width, or -1 if no intrinsic width
|
|
*/
|
|
public int getIntrinsicWidth() {
|
|
return -1;
|
|
}
|
|
|
|
/**
|
|
* Returns the drawable's intrinsic height.
|
|
* <p>
|
|
* Intrinsic height is the height at which the drawable would like to be
|
|
* laid out, including any inherent padding. If the drawable has no
|
|
* intrinsic height, such as a solid color, this method returns -1.
|
|
*
|
|
* @return the intrinsic height, or -1 if no intrinsic height
|
|
*/
|
|
public int getIntrinsicHeight() {
|
|
return -1;
|
|
}
|
|
|
|
/**
|
|
* Returns the minimum width suggested by this Drawable. If a View uses this
|
|
* Drawable as a background, it is suggested that the View use at least this
|
|
* value for its width. (There will be some scenarios where this will not be
|
|
* possible.) This value should INCLUDE any padding.
|
|
*
|
|
* @return The minimum width suggested by this Drawable. If this Drawable
|
|
* doesn't have a suggested minimum width, 0 is returned.
|
|
*/
|
|
public int getMinimumWidth() {
|
|
final int intrinsicWidth = getIntrinsicWidth();
|
|
return intrinsicWidth > 0 ? intrinsicWidth : 0;
|
|
}
|
|
|
|
/**
|
|
* Returns the minimum height suggested by this Drawable. If a View uses this
|
|
* Drawable as a background, it is suggested that the View use at least this
|
|
* value for its height. (There will be some scenarios where this will not be
|
|
* possible.) This value should INCLUDE any padding.
|
|
*
|
|
* @return The minimum height suggested by this Drawable. If this Drawable
|
|
* doesn't have a suggested minimum height, 0 is returned.
|
|
*/
|
|
public int getMinimumHeight() {
|
|
final int intrinsicHeight = getIntrinsicHeight();
|
|
return intrinsicHeight > 0 ? intrinsicHeight : 0;
|
|
}
|
|
|
|
/**
|
|
* Return in padding the insets suggested by this Drawable for placing
|
|
* content inside the drawable's bounds. Positive values move toward the
|
|
* center of the Drawable (set Rect.inset).
|
|
*
|
|
* @return true if this drawable actually has a padding, else false. When false is returned,
|
|
* the padding is always set to 0.
|
|
*/
|
|
public boolean getPadding(@NonNull Rect padding) {
|
|
padding.set(0, 0, 0, 0);
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Return in insets the layout insets suggested by this Drawable for use with alignment
|
|
* operations during layout.
|
|
*
|
|
*/
|
|
public @NonNull Insets getOpticalInsets() {
|
|
return Insets.NONE;
|
|
}
|
|
|
|
/**
|
|
* Called to get the drawable to populate the Outline that defines its drawing area.
|
|
* <p>
|
|
* This method is called by the default {@link android.view.ViewOutlineProvider} to define
|
|
* the outline of the View.
|
|
* <p>
|
|
* The default behavior defines the outline to be the bounding rectangle of 0 alpha.
|
|
* Subclasses that wish to convey a different shape or alpha value must override this method.
|
|
*
|
|
* @see android.view.View#setOutlineProvider(android.view.ViewOutlineProvider)
|
|
*/
|
|
public void getOutline(@NonNull Outline outline) {
|
|
outline.setRect(getBounds());
|
|
outline.setAlpha(0);
|
|
}
|
|
|
|
/**
|
|
* Make this drawable mutable. This operation cannot be reversed. A mutable
|
|
* drawable is guaranteed to not share its state with any other drawable.
|
|
* This is especially useful when you need to modify properties of drawables
|
|
* loaded from resources. By default, all drawables instances loaded from
|
|
* the same resource share a common state; if you modify the state of one
|
|
* instance, all the other instances will receive the same modification.
|
|
*
|
|
* Calling this method on a mutable Drawable will have no effect.
|
|
*
|
|
* @return This drawable.
|
|
* @see ConstantState
|
|
* @see #getConstantState()
|
|
*/
|
|
public @NonNull Drawable mutate() {
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Clears the mutated state, allowing this drawable to be cached and
|
|
* mutated again.
|
|
* <p>
|
|
* This is hidden because only framework drawables can be cached, so
|
|
* custom drawables don't need to support constant state, mutate(), or
|
|
* clearMutated().
|
|
*
|
|
* @hide
|
|
*/
|
|
public void clearMutated() {
|
|
// Default implementation is no-op.
|
|
}
|
|
|
|
/**
|
|
* Create a drawable from an inputstream
|
|
*/
|
|
public static @Nullable Drawable createFromStream(@Nullable InputStream is,
|
|
@Nullable String srcName) {
|
|
Trace.traceBegin(Trace.TRACE_TAG_RESOURCES, srcName != null ? srcName : "Unknown drawable");
|
|
try {
|
|
return createFromResourceStream(null, null, is, srcName);
|
|
} finally {
|
|
Trace.traceEnd(Trace.TRACE_TAG_RESOURCES);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Create a drawable from an inputstream, using the given resources and
|
|
* value to determine density information.
|
|
*/
|
|
public static @Nullable Drawable createFromResourceStream(@Nullable Resources res,
|
|
@Nullable TypedValue value, @Nullable InputStream is, @Nullable String srcName) {
|
|
Trace.traceBegin(Trace.TRACE_TAG_RESOURCES, srcName != null ? srcName : "Unknown drawable");
|
|
try {
|
|
return createFromResourceStream(res, value, is, srcName, null);
|
|
} finally {
|
|
Trace.traceEnd(Trace.TRACE_TAG_RESOURCES);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Create a drawable from an inputstream, using the given resources and
|
|
* value to determine density information.
|
|
*
|
|
* @deprecated Prefer the version without an Options object.
|
|
*/
|
|
public static @Nullable Drawable createFromResourceStream(@Nullable Resources res,
|
|
@Nullable TypedValue value, @Nullable InputStream is, @Nullable String srcName,
|
|
@Nullable BitmapFactory.Options opts) {
|
|
if (is == null) {
|
|
return null;
|
|
}
|
|
|
|
if (opts == null) {
|
|
return getBitmapDrawable(res, value, is);
|
|
}
|
|
|
|
/* ugh. The decodeStream contract is that we have already allocated
|
|
the pad rect, but if the bitmap does not had a ninepatch chunk,
|
|
then the pad will be ignored. If we could change this to lazily
|
|
alloc/assign the rect, we could avoid the GC churn of making new
|
|
Rects only to drop them on the floor.
|
|
*/
|
|
Rect pad = new Rect();
|
|
|
|
// Special stuff for compatibility mode: if the target density is not
|
|
// the same as the display density, but the resource -is- the same as
|
|
// the display density, then don't scale it down to the target density.
|
|
// This allows us to load the system's density-correct resources into
|
|
// an application in compatibility mode, without scaling those down
|
|
// to the compatibility density only to have them scaled back up when
|
|
// drawn to the screen.
|
|
opts.inScreenDensity = Drawable.resolveDensity(res, 0);
|
|
Bitmap bm = BitmapFactory.decodeResourceStream(res, value, is, pad, opts);
|
|
if (bm != null) {
|
|
byte[] np = bm.getNinePatchChunk();
|
|
if (np == null || !NinePatch.isNinePatchChunk(np)) {
|
|
np = null;
|
|
pad = null;
|
|
}
|
|
|
|
final Rect opticalInsets = new Rect();
|
|
bm.getOpticalInsets(opticalInsets);
|
|
return drawableFromBitmap(res, bm, np, pad, opticalInsets, srcName);
|
|
}
|
|
return null;
|
|
}
|
|
|
|
private static Drawable getBitmapDrawable(Resources res, @Nullable TypedValue value,
|
|
@NonNull InputStream is) {
|
|
try {
|
|
ImageDecoder.Source source = null;
|
|
if (value != null) {
|
|
int density = Bitmap.DENSITY_NONE;
|
|
if (value.density == TypedValue.DENSITY_DEFAULT) {
|
|
density = DisplayMetrics.DENSITY_DEFAULT;
|
|
} else if (value.density != TypedValue.DENSITY_NONE) {
|
|
density = value.density;
|
|
}
|
|
source = ImageDecoder.createSource(res, is, density);
|
|
} else {
|
|
source = ImageDecoder.createSource(res, is);
|
|
}
|
|
|
|
return ImageDecoder.decodeDrawable(source, (decoder, info, src) -> {
|
|
decoder.setAllocator(ImageDecoder.ALLOCATOR_SOFTWARE);
|
|
decoder.setOnPartialImageListener((e) -> {
|
|
return e.getError() == ImageDecoder.DecodeException.SOURCE_INCOMPLETE;
|
|
});
|
|
});
|
|
} catch (IOException e) {
|
|
/* do nothing.
|
|
If the exception happened on decode, the drawable will be null.
|
|
*/
|
|
Log.e("Drawable", "Unable to decode stream: " + e);
|
|
}
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Create a drawable from an XML document. For more information on how to
|
|
* create resources in XML, see
|
|
* <a href="{@docRoot}guide/topics/resources/drawable-resource.html">Drawable Resources</a>.
|
|
*/
|
|
@NonNull
|
|
public static Drawable createFromXml(@NonNull Resources r, @NonNull XmlPullParser parser)
|
|
throws XmlPullParserException, IOException {
|
|
return createFromXml(r, parser, null);
|
|
}
|
|
|
|
/**
|
|
* Create a drawable from an XML document using an optional {@link Theme}.
|
|
* For more information on how to create resources in XML, see
|
|
* <a href="{@docRoot}guide/topics/resources/drawable-resource.html">Drawable Resources</a>.
|
|
*/
|
|
@NonNull
|
|
public static Drawable createFromXml(@NonNull Resources r, @NonNull XmlPullParser parser,
|
|
@Nullable Theme theme) throws XmlPullParserException, IOException {
|
|
return createFromXmlForDensity(r, parser, 0, theme);
|
|
}
|
|
|
|
/**
|
|
* Version of {@link #createFromXml(Resources, XmlPullParser, Theme)} that accepts a density
|
|
* override.
|
|
* @hide
|
|
*/
|
|
@NonNull
|
|
public static Drawable createFromXmlForDensity(@NonNull Resources r,
|
|
@NonNull XmlPullParser parser, int density, @Nullable Theme theme)
|
|
throws XmlPullParserException, IOException {
|
|
AttributeSet attrs = Xml.asAttributeSet(parser);
|
|
|
|
int type;
|
|
//noinspection StatementWithEmptyBody
|
|
while ((type=parser.next()) != XmlPullParser.START_TAG
|
|
&& type != XmlPullParser.END_DOCUMENT) {
|
|
// Empty loop.
|
|
}
|
|
|
|
if (type != XmlPullParser.START_TAG) {
|
|
throw new XmlPullParserException("No start tag found");
|
|
}
|
|
|
|
Drawable drawable = createFromXmlInnerForDensity(r, parser, attrs, density, theme);
|
|
|
|
if (drawable == null) {
|
|
throw new RuntimeException("Unknown initial tag: " + parser.getName());
|
|
}
|
|
|
|
return drawable;
|
|
}
|
|
|
|
/**
|
|
* Create from inside an XML document. Called on a parser positioned at
|
|
* a tag in an XML document, tries to create a Drawable from that tag.
|
|
* Returns null if the tag is not a valid drawable.
|
|
*/
|
|
public static @NonNull Drawable createFromXmlInner(@NonNull Resources r,
|
|
@NonNull XmlPullParser parser, @NonNull AttributeSet attrs)
|
|
throws XmlPullParserException, IOException {
|
|
return createFromXmlInner(r, parser, attrs, null);
|
|
}
|
|
|
|
/**
|
|
* Create a drawable from inside an XML document using an optional
|
|
* {@link Theme}. Called on a parser positioned at a tag in an XML
|
|
* document, tries to create a Drawable from that tag. Returns {@code null}
|
|
* if the tag is not a valid drawable.
|
|
*/
|
|
public static @NonNull Drawable createFromXmlInner(@NonNull Resources r,
|
|
@NonNull XmlPullParser parser, @NonNull AttributeSet attrs, @Nullable Theme theme)
|
|
throws XmlPullParserException, IOException {
|
|
return createFromXmlInnerForDensity(r, parser, attrs, 0, theme);
|
|
}
|
|
|
|
/**
|
|
* Version of {@link #createFromXmlInner(Resources, XmlPullParser, AttributeSet, Theme)} that
|
|
* accepts an override density.
|
|
*/
|
|
static @NonNull Drawable createFromXmlInnerForDensity(@NonNull Resources r,
|
|
@NonNull XmlPullParser parser, @NonNull AttributeSet attrs, int density,
|
|
@Nullable Theme theme) throws XmlPullParserException, IOException {
|
|
return r.getDrawableInflater().inflateFromXmlForDensity(parser.getName(), parser, attrs,
|
|
density, theme);
|
|
}
|
|
|
|
/**
|
|
* Create a drawable from file path name.
|
|
*/
|
|
public static @Nullable Drawable createFromPath(String pathName) {
|
|
if (pathName == null) {
|
|
return null;
|
|
}
|
|
|
|
Trace.traceBegin(Trace.TRACE_TAG_RESOURCES, pathName);
|
|
try (FileInputStream stream = new FileInputStream(pathName)) {
|
|
return getBitmapDrawable(null, null, stream);
|
|
} catch(IOException e) {
|
|
// Do nothing; we will just return null if the FileInputStream had an error
|
|
} finally {
|
|
Trace.traceEnd(Trace.TRACE_TAG_RESOURCES);
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Inflate this Drawable from an XML resource. Does not apply a theme.
|
|
*
|
|
* @see #inflate(Resources, XmlPullParser, AttributeSet, Theme)
|
|
*/
|
|
public void inflate(@NonNull Resources r, @NonNull XmlPullParser parser,
|
|
@NonNull AttributeSet attrs) throws XmlPullParserException, IOException {
|
|
inflate(r, parser, attrs, null);
|
|
}
|
|
|
|
/**
|
|
* Inflate this Drawable from an XML resource optionally styled by a theme.
|
|
* This can't be called more than once for each Drawable. Note that framework may have called
|
|
* this once to create the Drawable instance from XML resource.
|
|
*
|
|
* @param r Resources used to resolve attribute values
|
|
* @param parser XML parser from which to inflate this Drawable
|
|
* @param attrs Base set of attribute values
|
|
* @param theme Theme to apply, may be null
|
|
* @throws XmlPullParserException
|
|
* @throws IOException
|
|
*/
|
|
public void inflate(@NonNull Resources r, @NonNull XmlPullParser parser,
|
|
@NonNull AttributeSet attrs, @Nullable Theme theme)
|
|
throws XmlPullParserException, IOException {
|
|
final TypedArray a = obtainAttributes(r, theme, attrs, R.styleable.Drawable);
|
|
mVisible = a.getBoolean(R.styleable.Drawable_visible, mVisible);
|
|
a.recycle();
|
|
}
|
|
|
|
/**
|
|
* Inflate a Drawable from an XML resource.
|
|
*
|
|
* @throws XmlPullParserException
|
|
* @throws IOException
|
|
*/
|
|
@UnsupportedAppUsage
|
|
void inflateWithAttributes(@NonNull @SuppressWarnings("unused") Resources r,
|
|
@NonNull @SuppressWarnings("unused") XmlPullParser parser, @NonNull TypedArray attrs,
|
|
@AttrRes int visibleAttr) throws XmlPullParserException, IOException {
|
|
mVisible = attrs.getBoolean(visibleAttr, mVisible);
|
|
}
|
|
|
|
/**
|
|
* Sets the source override density for this Drawable. If non-zero, this density is to be used
|
|
* for any calls to {@link Resources#getDrawableForDensity(int, int, Theme)} or
|
|
* {@link Resources#getValueForDensity(int, int, TypedValue, boolean)}.
|
|
* @hide
|
|
*/
|
|
final void setSrcDensityOverride(int density) {
|
|
mSrcDensityOverride = density;
|
|
}
|
|
|
|
/**
|
|
* This abstract class is used by {@link Drawable}s to store shared constant state and data
|
|
* between Drawables. {@link BitmapDrawable}s created from the same resource will for instance
|
|
* share a unique bitmap stored in their ConstantState.
|
|
*
|
|
* <p>
|
|
* {@link #newDrawable(Resources)} can be used as a factory to create new Drawable instances
|
|
* from this ConstantState.
|
|
* </p>
|
|
*
|
|
* Use {@link Drawable#getConstantState()} to retrieve the ConstantState of a Drawable. Calling
|
|
* {@link Drawable#mutate()} on a Drawable should typically create a new ConstantState for that
|
|
* Drawable.
|
|
*/
|
|
public static abstract class ConstantState {
|
|
/**
|
|
* Creates a new Drawable instance from its constant state.
|
|
* <p>
|
|
* <strong>Note:</strong> Using this method means density-dependent
|
|
* properties, such as pixel dimensions or bitmap images, will not be
|
|
* updated to match the density of the target display. To ensure
|
|
* correct scaling, use {@link #newDrawable(Resources)} instead to
|
|
* provide an appropriate Resources object.
|
|
*
|
|
* @return a new drawable object based on this constant state
|
|
* @see #newDrawable(Resources)
|
|
*/
|
|
public abstract @NonNull Drawable newDrawable();
|
|
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/**
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* Creates a new Drawable instance from its constant state using the
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* specified resources. This method should be implemented for drawables
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* that have density-dependent properties.
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* <p>
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* The default implementation for this method calls through to
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* {@link #newDrawable()}.
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*
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* @param res the resources of the context in which the drawable will
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* be displayed
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* @return a new drawable object based on this constant state
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*/
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public @NonNull Drawable newDrawable(@Nullable Resources res) {
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return newDrawable();
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}
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/**
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* Creates a new Drawable instance from its constant state using the
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* specified resources and theme. This method should be implemented for
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* drawables that have theme-dependent properties.
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* <p>
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* The default implementation for this method calls through to
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* {@link #newDrawable(Resources)}.
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*
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* @param res the resources of the context in which the drawable will
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|
* be displayed
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* @param theme the theme of the context in which the drawable will be
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* displayed
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* @return a new drawable object based on this constant state
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*/
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public @NonNull Drawable newDrawable(@Nullable Resources res,
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@Nullable @SuppressWarnings("unused") Theme theme) {
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return newDrawable(res);
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}
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/**
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* Return a bit mask of configuration changes that will impact
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* this drawable (and thus require completely reloading it).
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*/
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public abstract @Config int getChangingConfigurations();
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/**
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* Return whether this constant state can have a theme applied.
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*/
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public boolean canApplyTheme() {
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return false;
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}
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}
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/**
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* Return a {@link ConstantState} instance that holds the shared state of this Drawable.
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*
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* @return The ConstantState associated to that Drawable.
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* @see ConstantState
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* @see Drawable#mutate()
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*/
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public @Nullable ConstantState getConstantState() {
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return null;
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}
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private static Drawable drawableFromBitmap(Resources res, Bitmap bm, byte[] np,
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Rect pad, Rect layoutBounds, String srcName) {
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if (np != null) {
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return new NinePatchDrawable(res, bm, np, pad, layoutBounds, srcName);
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}
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return new BitmapDrawable(res, bm);
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}
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/**
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* Ensures the tint filter is consistent with the current tint color and
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* mode.
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*/
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@UnsupportedAppUsage
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@Nullable PorterDuffColorFilter updateTintFilter(@Nullable PorterDuffColorFilter tintFilter,
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@Nullable ColorStateList tint, @Nullable PorterDuff.Mode tintMode) {
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if (tint == null || tintMode == null) {
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return null;
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}
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final int color = tint.getColorForState(getState(), Color.TRANSPARENT);
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if (tintFilter == null || tintFilter.getColor() != color
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|| tintFilter.getMode() != tintMode) {
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return new PorterDuffColorFilter(color, tintMode);
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}
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return tintFilter;
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}
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@Nullable BlendModeColorFilter updateBlendModeFilter(@Nullable BlendModeColorFilter blendFilter,
|
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@Nullable ColorStateList tint, @Nullable BlendMode blendMode) {
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if (tint == null || blendMode == null) {
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return null;
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|
}
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final int color = tint.getColorForState(getState(), Color.TRANSPARENT);
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if (blendFilter == null || blendFilter.getColor() != color
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|| blendFilter.getMode() != blendMode) {
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return new BlendModeColorFilter(color, blendMode);
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}
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return blendFilter;
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}
|
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|
|
/**
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|
* Obtains styled attributes from the theme, if available, or unstyled
|
|
* resources if the theme is null.
|
|
* @hide
|
|
*/
|
|
protected static @NonNull TypedArray obtainAttributes(@NonNull Resources res,
|
|
@Nullable Theme theme, @NonNull AttributeSet set, @NonNull int[] attrs) {
|
|
if (theme == null) {
|
|
return res.obtainAttributes(set, attrs);
|
|
}
|
|
return theme.obtainStyledAttributes(set, attrs, 0, 0);
|
|
}
|
|
|
|
/**
|
|
* Scales a floating-point pixel value from the source density to the
|
|
* target density.
|
|
*
|
|
* @param pixels the pixel value for use in source density
|
|
* @param sourceDensity the source density
|
|
* @param targetDensity the target density
|
|
* @return the scaled pixel value for use in target density
|
|
*/
|
|
static float scaleFromDensity(float pixels, int sourceDensity, int targetDensity) {
|
|
return pixels * targetDensity / sourceDensity;
|
|
}
|
|
|
|
/**
|
|
* Scales a pixel value from the source density to the target density,
|
|
* optionally handling the resulting pixel value as a size rather than an
|
|
* offset.
|
|
* <p>
|
|
* A size conversion involves rounding the base value and ensuring that
|
|
* a non-zero base value is at least one pixel in size.
|
|
* <p>
|
|
* An offset conversion involves simply truncating the base value to an
|
|
* integer.
|
|
*
|
|
* @param pixels the pixel value for use in source density
|
|
* @param sourceDensity the source density
|
|
* @param targetDensity the target density
|
|
* @param isSize {@code true} to handle the resulting scaled value as a
|
|
* size, or {@code false} to handle it as an offset
|
|
* @return the scaled pixel value for use in target density
|
|
*/
|
|
static int scaleFromDensity(
|
|
int pixels, int sourceDensity, int targetDensity, boolean isSize) {
|
|
if (pixels == 0 || sourceDensity == targetDensity) {
|
|
return pixels;
|
|
}
|
|
|
|
final float result = pixels * targetDensity / (float) sourceDensity;
|
|
if (!isSize) {
|
|
return (int) result;
|
|
}
|
|
|
|
final int rounded = Math.round(result);
|
|
if (rounded != 0) {
|
|
return rounded;
|
|
} else if (pixels > 0) {
|
|
return 1;
|
|
} else {
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
static int resolveDensity(@Nullable Resources r, int parentDensity) {
|
|
final int densityDpi = r == null ? parentDensity : r.getDisplayMetrics().densityDpi;
|
|
return densityDpi == 0 ? DisplayMetrics.DENSITY_DEFAULT : densityDpi;
|
|
}
|
|
|
|
/**
|
|
* Re-throws an exception as a {@link RuntimeException} with an empty stack
|
|
* trace to avoid cluttering the log. The original exception's stack trace
|
|
* will still be included.
|
|
*
|
|
* @param cause the exception to re-throw
|
|
* @throws RuntimeException
|
|
*/
|
|
static void rethrowAsRuntimeException(@NonNull Exception cause) throws RuntimeException {
|
|
final RuntimeException e = new RuntimeException(cause);
|
|
e.setStackTrace(new StackTraceElement[0]);
|
|
throw e;
|
|
}
|
|
|
|
/**
|
|
* Parses a {@link android.graphics.PorterDuff.Mode} from a tintMode
|
|
* attribute's enum value.
|
|
*
|
|
* @hide
|
|
*/
|
|
@UnsupportedAppUsage
|
|
public static PorterDuff.Mode parseTintMode(int value, Mode defaultMode) {
|
|
switch (value) {
|
|
case 3: return Mode.SRC_OVER;
|
|
case 5: return Mode.SRC_IN;
|
|
case 9: return Mode.SRC_ATOP;
|
|
case 14: return Mode.MULTIPLY;
|
|
case 15: return Mode.SCREEN;
|
|
case 16: return Mode.ADD;
|
|
default: return defaultMode;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Parses a {@link android.graphics.BlendMode} from a tintMode
|
|
* attribute's enum value.
|
|
*
|
|
* @hide
|
|
*/
|
|
@UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
|
|
public static BlendMode parseBlendMode(int value, BlendMode defaultMode) {
|
|
switch (value) {
|
|
case 3: return BlendMode.SRC_OVER;
|
|
case 5: return BlendMode.SRC_IN;
|
|
case 9: return BlendMode.SRC_ATOP;
|
|
// b/73224934 PorterDuff Multiply maps to Skia Modulate so actually
|
|
// return BlendMode.MODULATE here
|
|
case 14: return BlendMode.MODULATE;
|
|
case 15: return BlendMode.SCREEN;
|
|
case 16: return BlendMode.PLUS;
|
|
default: return defaultMode;
|
|
}
|
|
}
|
|
}
|
|
|