1 package com.android.dialer.list; 2 3 import android.view.View; 4 import android.view.View.AccessibilityDelegate; 5 import android.view.ViewGroup; 6 import android.view.accessibility.AccessibilityEvent; 7 8 /** 9 * AccessibilityDelegate that will filter out TYPE_WINDOW_CONTENT_CHANGED 10 * Used to suppress "Showing items x of y" from firing of ListView whenever it's content changes. 11 * AccessibilityEvent can only be rejected at a view's parent once it is generated, 12 * use addToParent() to add this delegate to the parent. 13 */ 14 public class ContentChangedFilter extends AccessibilityDelegate { 15 //the view we don't want TYPE_WINDOW_CONTENT_CHANGED to fire. 16 private View mView; 17 18 /** 19 * Add this delegate to the parent of @param view to filter out TYPE_WINDOW_CONTENT_CHANGED 20 */ 21 public static void addToParent(View view){ 22 View parent = (View) view.getParent(); 23 parent.setAccessibilityDelegate(new ContentChangedFilter(view)); 24 } 25 26 private ContentChangedFilter(View view){ 27 super(); 28 mView = view; 29 } 30 @Override 31 public boolean onRequestSendAccessibilityEvent (ViewGroup host, View child, AccessibilityEvent event){ 32 if(child == mView){ 33 if(event.getEventType() == AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED){ 34 return false; 35 } 36 } 37 return super.onRequestSendAccessibilityEvent(host,child,event); 38 } 39 40 } 41
