124 lines
4.5 KiB
Java
124 lines
4.5 KiB
Java
/*
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* Copyright (C) 2012 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 com.android.internal.view;
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import android.compat.annotation.UnsupportedAppUsage;
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import android.content.Context;
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import android.content.res.Configuration;
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import android.content.res.Resources;
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import android.content.res.TypedArray;
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import android.os.Build;
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import com.android.internal.R;
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/**
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* Allows components to query for various configuration policy decisions
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* about how the action bar should lay out and behave on the current device.
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*/
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public class ActionBarPolicy {
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@UnsupportedAppUsage
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private Context mContext;
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@UnsupportedAppUsage
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public static ActionBarPolicy get(Context context) {
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return new ActionBarPolicy(context);
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}
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@UnsupportedAppUsage
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private ActionBarPolicy(Context context) {
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mContext = context;
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}
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/**
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* Returns the maximum number of action buttons that should be permitted within an action
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* bar/action mode. This will be used to determine how many showAsAction="ifRoom" items can fit.
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* "always" items can override this.
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*/
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@UnsupportedAppUsage
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public int getMaxActionButtons() {
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final Configuration config = mContext.getResources().getConfiguration();
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final int width = config.screenWidthDp;
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final int height = config.screenHeightDp;
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final int smallest = config.smallestScreenWidthDp;
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if (smallest > 600 || (width > 960 && height > 720) || (width > 720 && height > 960)) {
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// For values-w600dp, values-sw600dp and values-xlarge.
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return 5;
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} else if (width >= 500 || (width > 640 && height > 480) || (width > 480 && height > 640)) {
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// For values-w500dp and values-large.
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return 4;
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} else if (width >= 360) {
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// For values-w360dp.
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return 3;
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} else {
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return 2;
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}
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}
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@UnsupportedAppUsage
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public boolean showsOverflowMenuButton() {
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return true;
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}
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@UnsupportedAppUsage
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public int getEmbeddedMenuWidthLimit() {
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return mContext.getResources().getDisplayMetrics().widthPixels / 2;
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}
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@UnsupportedAppUsage
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public boolean hasEmbeddedTabs() {
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final int targetSdk = mContext.getApplicationInfo().targetSdkVersion;
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if (targetSdk >= Build.VERSION_CODES.JELLY_BEAN) {
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return mContext.getResources().getBoolean(R.bool.action_bar_embed_tabs);
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}
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// The embedded tabs policy changed in Jellybean; give older apps the old policy
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// so they get what they expect.
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final Configuration configuration = mContext.getResources().getConfiguration();
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final int width = configuration.screenWidthDp;
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final int height = configuration.screenHeightDp;
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return configuration.orientation == Configuration.ORIENTATION_LANDSCAPE ||
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width >= 480 || (width >= 640 && height >= 480);
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}
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@UnsupportedAppUsage
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public int getTabContainerHeight() {
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TypedArray a = mContext.obtainStyledAttributes(null, R.styleable.ActionBar,
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com.android.internal.R.attr.actionBarStyle, 0);
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int height = a.getLayoutDimension(R.styleable.ActionBar_height, 0);
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Resources r = mContext.getResources();
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if (!hasEmbeddedTabs()) {
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// Stacked tabs; limit the height
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height = Math.min(height,
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r.getDimensionPixelSize(R.dimen.action_bar_stacked_max_height));
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}
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a.recycle();
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return height;
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}
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public boolean enableHomeButtonByDefault() {
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// Older apps get the home button interaction enabled by default.
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// Newer apps need to enable it explicitly.
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return mContext.getApplicationInfo().targetSdkVersion <
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Build.VERSION_CODES.ICE_CREAM_SANDWICH;
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}
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@UnsupportedAppUsage
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public int getStackedTabMaxWidth() {
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return mContext.getResources().getDimensionPixelSize(
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R.dimen.action_bar_stacked_tab_max_width);
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}
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}
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