1 /* 2 * Copyright (C) 2015 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 17 package com.android.contacts.editor; 18 19 import android.view.View; 20 import android.view.View.AccessibilityDelegate; 21 import android.view.ViewGroup; 22 import android.view.accessibility.AccessibilityEvent; 23 24 /** 25 * This is an AccessibilityDelegate that filters out the TYPE_VIEW_SELECTED event. 26 */ 27 public class ViewSelectedFilter extends AccessibilityDelegate { 28 private View mView; //the view we don't want TYPE_VIEW_SELECTED event to fire. 29 ViewSelectedFilter(View view)30 private ViewSelectedFilter(View view) { 31 super(); 32 mView = view; 33 } 34 35 /** 36 * AccessibilityEvent can only be suppressed at a view's parent, so this function adds the 37 * delegate to the view's parent. 38 * @param view the view whose TYPE_VIEW_SELECTED event should be suppressed. 39 */ suppressViewSelectedEvent(View view)40 public static void suppressViewSelectedEvent(View view) { 41 final View parent = (View) view.getParent(); 42 parent.setAccessibilityDelegate(new ViewSelectedFilter(view)); 43 } 44 45 @Override onRequestSendAccessibilityEvent( ViewGroup host, View child,AccessibilityEvent event)46 public boolean onRequestSendAccessibilityEvent( 47 ViewGroup host, View child,AccessibilityEvent event) { 48 if (child == mView && event.getEventType() == AccessibilityEvent.TYPE_VIEW_SELECTED) { 49 return false; 50 } 51 return super.onRequestSendAccessibilityEvent(host, child, event); 52 } 53 } 54