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.launcher3; 18 19 import android.content.Context; 20 import android.graphics.Bitmap; 21 import android.graphics.Canvas; 22 import android.graphics.Paint; 23 import android.view.View; 24 25 public class FastBitmapView extends View { 26 27 private final Paint mPaint = new Paint(Paint.FILTER_BITMAP_FLAG); 28 private Bitmap mBitmap; 29 30 public FastBitmapView(Context context) { 31 super(context); 32 } 33 34 /** 35 * Applies the new bitmap. 36 * @return true if the view was invalidated. 37 */ 38 public boolean setBitmap(Bitmap b) { 39 if (b != mBitmap){ 40 if (mBitmap != null) { 41 invalidate(0, 0, mBitmap.getWidth(), mBitmap.getHeight()); 42 } 43 mBitmap = b; 44 if (mBitmap != null) { 45 invalidate(0, 0, mBitmap.getWidth(), mBitmap.getHeight()); 46 } 47 return true; 48 } 49 return false; 50 } 51 52 @Override 53 protected void onDraw(Canvas canvas) { 54 if (mBitmap != null) { 55 canvas.drawBitmap(mBitmap, 0, 0, mPaint); 56 } 57 } 58 } 59
