Jon Miranda | 16ea1b1 | 2017-12-12 14:52:48 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2017 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 | package com.android.wallpaper.asset; |
| 17 | |
| 18 | import android.app.Activity; |
| 19 | import android.app.WallpaperManager; |
| 20 | import android.content.Context; |
| 21 | import android.graphics.Bitmap; |
| 22 | import android.graphics.Point; |
| 23 | import android.graphics.Rect; |
| 24 | import android.graphics.drawable.BitmapDrawable; |
| 25 | import android.graphics.drawable.Drawable; |
| 26 | import android.os.AsyncTask; |
| 27 | |
| 28 | /** |
| 29 | * Asset implementation which represents the currently-set wallpaper on API 16 through 23 devices. |
| 30 | */ |
| 31 | public class CurrentWallpaperAssetV16 extends Asset { |
| 32 | |
| 33 | private static final boolean FILTER_SCALED_BITMAP = true; |
| 34 | |
| 35 | private Context mApplicationContext; |
Santiago Etchebehere | 69934b3 | 2021-04-19 16:44:15 -0700 | [diff] [blame] | 36 | private Drawable mCurrentWallpaperDrawable; |
Jon Miranda | 16ea1b1 | 2017-12-12 14:52:48 -0800 | [diff] [blame] | 37 | |
| 38 | public CurrentWallpaperAssetV16(Context context) { |
| 39 | mApplicationContext = context.getApplicationContext(); |
| 40 | } |
| 41 | |
| 42 | @Override |
| 43 | public void decodeBitmapRegion(Rect rect, int targetWidth, int targetHeight, |
Santiago Etchebehere | 16cf060 | 2020-12-11 17:04:18 -0800 | [diff] [blame] | 44 | boolean shouldAdjustForRtl, BitmapReceiver receiver) { |
Jon Miranda | 16ea1b1 | 2017-12-12 14:52:48 -0800 | [diff] [blame] | 45 | receiver.onBitmapDecoded(null); |
| 46 | } |
| 47 | |
| 48 | @Override |
| 49 | public void decodeBitmap(int targetWidth, int targetHeight, |
| 50 | BitmapReceiver receiver) { |
| 51 | DecodeBitmapAsyncTask task = new DecodeBitmapAsyncTask(receiver, targetWidth, targetHeight); |
| 52 | task.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR); |
| 53 | } |
| 54 | |
| 55 | @Override |
| 56 | public boolean supportsTiling() { |
| 57 | return false; |
| 58 | } |
| 59 | |
| 60 | @Override |
| 61 | public void decodeRawDimensions(Activity unused, DimensionsReceiver receiver) { |
| 62 | DecodeDimensionsAsyncTask task = new DecodeDimensionsAsyncTask(receiver); |
| 63 | task.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR); |
| 64 | } |
| 65 | |
Santiago Etchebehere | 69934b3 | 2021-04-19 16:44:15 -0700 | [diff] [blame] | 66 | private synchronized Drawable getCurrentWallpaperDrawable() { |
| 67 | if (mCurrentWallpaperDrawable != null) { |
| 68 | return mCurrentWallpaperDrawable; |
Jon Miranda | 16ea1b1 | 2017-12-12 14:52:48 -0800 | [diff] [blame] | 69 | } |
Santiago Etchebehere | 69934b3 | 2021-04-19 16:44:15 -0700 | [diff] [blame] | 70 | WallpaperManager wallpaperManager = WallpaperManager.getInstance(mApplicationContext); |
| 71 | try { |
| 72 | mCurrentWallpaperDrawable = wallpaperManager.getDrawable(); |
| 73 | } catch (java.lang.SecurityException e) { |
| 74 | // Work around Samsung bug where SecurityException is thrown if device is still using |
| 75 | // its default wallpaper. |
| 76 | mCurrentWallpaperDrawable = wallpaperManager.getBuiltInDrawable(); |
| 77 | } |
| 78 | return mCurrentWallpaperDrawable; |
Jon Miranda | 16ea1b1 | 2017-12-12 14:52:48 -0800 | [diff] [blame] | 79 | } |
| 80 | |
| 81 | /** |
| 82 | * Decodes and then post-decode scales down the currently-set wallpaper bitmap. |
| 83 | */ |
| 84 | private class DecodeBitmapAsyncTask extends AsyncTask<Void, Void, Bitmap> { |
| 85 | |
| 86 | private BitmapReceiver mReceiver; |
| 87 | private int mTargetWidth; |
| 88 | private int mTargetHeight; |
| 89 | |
| 90 | public DecodeBitmapAsyncTask(BitmapReceiver receiver, int width, int height) { |
| 91 | mReceiver = receiver; |
| 92 | mTargetWidth = width; |
| 93 | mTargetHeight = height; |
| 94 | } |
| 95 | |
| 96 | @Override |
| 97 | protected Bitmap doInBackground(Void... unused) { |
| 98 | Drawable wallpaperDrawable = getCurrentWallpaperDrawable(); |
| 99 | Bitmap bitmap = ((BitmapDrawable) wallpaperDrawable).getBitmap(); |
| 100 | |
| 101 | // The final bitmap may be constrained by only one of height and width, so find the maximum |
| 102 | // downscaling factor without having the final result bitmap's height or width dip below the |
| 103 | // provided target height or width. |
| 104 | float maxDownscaleFactor = Math.min((float) bitmap.getWidth() / mTargetWidth, |
| 105 | (float) bitmap.getHeight() / mTargetHeight); |
| 106 | |
| 107 | // Scale down full bitmap to save memory consumption post-decoding, while maintaining the |
| 108 | // source bitmap's aspect ratio. |
| 109 | int resultWidth = Math.round(bitmap.getWidth() / maxDownscaleFactor); |
| 110 | int resultHeight = Math.round(bitmap.getHeight() / maxDownscaleFactor); |
| 111 | return Bitmap.createScaledBitmap(bitmap, resultWidth, resultHeight, FILTER_SCALED_BITMAP); |
| 112 | } |
| 113 | |
| 114 | @Override |
| 115 | protected void onPostExecute(Bitmap bitmap) { |
| 116 | mReceiver.onBitmapDecoded(bitmap); |
| 117 | } |
| 118 | } |
| 119 | |
| 120 | /** |
| 121 | * Decodes the raw dimensions of the currently-set wallpaper. |
| 122 | */ |
| 123 | private class DecodeDimensionsAsyncTask extends AsyncTask<Void, Void, Point> { |
| 124 | |
| 125 | private DimensionsReceiver mReceiver; |
| 126 | |
| 127 | public DecodeDimensionsAsyncTask(DimensionsReceiver receiver) { |
| 128 | mReceiver = receiver; |
| 129 | } |
| 130 | |
| 131 | @Override |
| 132 | protected Point doInBackground(Void... unused) { |
| 133 | Drawable wallpaperDrawable = getCurrentWallpaperDrawable(); |
| 134 | return new Point( |
| 135 | wallpaperDrawable.getIntrinsicWidth(), wallpaperDrawable.getIntrinsicHeight()); |
| 136 | } |
| 137 | |
| 138 | @Override |
| 139 | protected void onPostExecute(Point dimensions) { |
| 140 | mReceiver.onDimensionsDecoded(dimensions); |
| 141 | } |
| 142 | } |
| 143 | } |