ClickableSpan.java revision 193520e3dff5248ddcf8435203bf99d2ba667219
1/* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.text.style; 18 19import android.text.TextPaint; 20import android.view.View; 21 22/** 23 * If an object of this type is attached to the text of a TextView 24 * with a movement method of LinkMovementMethod, the affected spans of 25 * text can be selected. If clicked, the {@link #onClick} method will 26 * be called. 27 */ 28public abstract class ClickableSpan extends CharacterStyle implements UpdateAppearance { 29 private static int sIdCounter = 0; 30 31 private int mId = sIdCounter++; 32 33 /** 34 * Performs the click action associated with this span. 35 */ 36 public abstract void onClick(View widget); 37 38 /** 39 * Makes the text underlined and in the link color. 40 */ 41 @Override 42 public void updateDrawState(TextPaint ds) { 43 ds.setColor(ds.linkColor); 44 ds.setUnderlineText(true); 45 } 46 47 /** 48 * Get the unique ID for this span. 49 * 50 * @return The unique ID. 51 * @hide 52 */ 53 public int getId() { 54 return mId; 55 } 56} 57