diff options
Diffstat (limited to 'java/com/android/dialer/app/list/ContentChangedFilter.java')
-rw-r--r-- | java/com/android/dialer/app/list/ContentChangedFilter.java | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/java/com/android/dialer/app/list/ContentChangedFilter.java b/java/com/android/dialer/app/list/ContentChangedFilter.java new file mode 100644 index 000000000..663846da5 --- /dev/null +++ b/java/com/android/dialer/app/list/ContentChangedFilter.java @@ -0,0 +1,56 @@ +/* + * Copyright (C) 2016 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package com.android.dialer.app.list; + +import android.view.View; +import android.view.View.AccessibilityDelegate; +import android.view.ViewGroup; +import android.view.accessibility.AccessibilityEvent; + +/** + * AccessibilityDelegate that will filter out TYPE_WINDOW_CONTENT_CHANGED Used to suppress "Showing + * items x of y" from firing of ListView whenever it's content changes. AccessibilityEvent can only + * be rejected at a view's parent once it is generated, use addToParent() to add this delegate to + * the parent. + */ +public class ContentChangedFilter extends AccessibilityDelegate { + + //the view we don't want TYPE_WINDOW_CONTENT_CHANGED to fire. + private View mView; + + private ContentChangedFilter(View view) { + super(); + mView = view; + } + + /** Add this delegate to the parent of @param view to filter out TYPE_WINDOW_CONTENT_CHANGED */ + public static void addToParent(View view) { + View parent = (View) view.getParent(); + parent.setAccessibilityDelegate(new ContentChangedFilter(view)); + } + + @Override + public boolean onRequestSendAccessibilityEvent( + ViewGroup host, View child, AccessibilityEvent event) { + if (child == mView) { + if (event.getEventType() == AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED) { + return false; + } + } + return super.onRequestSendAccessibilityEvent(host, child, event); + } +} |