73 lines
2.4 KiB
Java
73 lines
2.4 KiB
Java
/*
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* Copyright (C) 2008 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.text.style;
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import android.annotation.NonNull;
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import android.text.TextPaint;
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import android.view.View;
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/**
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* If an object of this type is attached to the text of a TextView
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* with a movement method of LinkMovementMethod, the affected spans of
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* text can be selected. If selected and clicked, the {@link #onClick} method will
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* be called.
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* <p>
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* The text with a <code>ClickableSpan</code> attached will be underlined and the link color will be
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* used as a text color. The default link color is the theme's accent color or
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* <code>android:textColorLink</code> if this attribute is defined in the theme.
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* For example, considering that we have a <code>CustomClickableSpan</code> that extends
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* <code>ClickableSpan</code>, it can be used like this:
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* <pre>{@code SpannableString string = new SpannableString("Text with clickable text");
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*string.setSpan(new CustomClickableSpan(), 10, 19, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);}</pre>
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* <img src="{@docRoot}reference/android/images/text/style/clickablespan.png" />
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* <figcaption>Text with <code>ClickableSpan</code>.</figcaption>
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*/
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public abstract class ClickableSpan extends CharacterStyle implements UpdateAppearance {
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private static int sIdCounter = 0;
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private int mId = sIdCounter++;
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/**
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* Performs the click action associated with this span.
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*/
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public abstract void onClick(@NonNull View widget);
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/**
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* Makes the text underlined and in the link color.
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*/
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@Override
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public void updateDrawState(@NonNull TextPaint ds) {
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ds.setColor(ds.linkColor);
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ds.setUnderlineText(true);
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}
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/**
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* Get the unique ID for this span.
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*
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* @return The unique ID.
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* @hide
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*/
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public int getId() {
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return mId;
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}
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@Override
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public String toString() {
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return "ClickableSpan{}";
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}
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}
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