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.systemui.recents.views; 18 19 import android.content.Context; 20 import android.graphics.drawable.BitmapDrawable; 21 import android.graphics.drawable.Drawable; 22 import android.util.AttributeSet; 23 24 import com.android.systemui.statusbar.AlphaOptimizedImageView; 25 26 /** 27 * This is an optimized ImageView that does not trigger a <code>requestLayout()</code> or 28 * <code>invalidate()</code> when setting the image to <code>null</code>. 29 */ 30 public class FixedSizeImageView extends AlphaOptimizedImageView { 31 32 private boolean mAllowRelayout = true; 33 private boolean mAllowInvalidate = true; 34 35 public FixedSizeImageView(Context context) { 36 this(context, null); 37 } 38 39 public FixedSizeImageView(Context context, AttributeSet attrs) { 40 this(context, attrs, 0); 41 } 42 43 public FixedSizeImageView(Context context, AttributeSet attrs, int defStyleAttr) { 44 this(context, attrs, defStyleAttr, 0); 45 } 46 47 public FixedSizeImageView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) { 48 super(context, attrs, defStyleAttr, defStyleRes); 49 } 50 51 @Override 52 public void requestLayout() { 53 if (mAllowRelayout) { 54 super.requestLayout(); 55 } 56 } 57 58 @Override 59 public void invalidate() { 60 if (mAllowInvalidate) { 61 super.invalidate(); 62 } 63 } 64 65 @Override 66 public void setImageDrawable(Drawable drawable) { 67 boolean isNullBitmapDrawable = (drawable instanceof BitmapDrawable) && 68 (((BitmapDrawable) drawable).getBitmap() == null); 69 if (drawable == null || isNullBitmapDrawable) { 70 mAllowRelayout = false; 71 mAllowInvalidate = false; 72 } 73 super.setImageDrawable(drawable); 74 mAllowRelayout = true; 75 mAllowInvalidate = true; 76 } 77 } 78
