1 /* 2 * Copyright (C) 2014 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.keyguard; 18 19 import android.content.Context; 20 import android.util.AttributeSet; 21 import android.widget.ImageButton; 22 23 /** 24 * A frame layout which does not have overlapping renderings commands and therefore does not need a 25 * layer when alpha is changed. 26 */ 27 public class AlphaOptimizedImageButton extends ImageButton { 28 AlphaOptimizedImageButton(Context context, AttributeSet attrs)29 public AlphaOptimizedImageButton(Context context, AttributeSet attrs) { 30 super(context, attrs); 31 } 32 33 @Override hasOverlappingRendering()34 public boolean hasOverlappingRendering() { 35 return false; 36 } 37 } 38