| /* |
| * Copyright (C) 2017 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.wallpaper.asset; |
| |
| import android.app.Activity; |
| import android.app.WallpaperManager; |
| import android.content.Context; |
| import android.graphics.Bitmap; |
| import android.graphics.Point; |
| import android.graphics.Rect; |
| import android.graphics.drawable.BitmapDrawable; |
| import android.graphics.drawable.Drawable; |
| import android.os.AsyncTask; |
| |
| /** |
| * Asset implementation which represents the currently-set wallpaper on API 16 through 23 devices. |
| */ |
| public class CurrentWallpaperAssetV16 extends Asset { |
| |
| private static final boolean FILTER_SCALED_BITMAP = true; |
| |
| private Context mApplicationContext; |
| private Drawable mCurrentWallpaperDrawable; |
| |
| public CurrentWallpaperAssetV16(Context context) { |
| mApplicationContext = context.getApplicationContext(); |
| } |
| |
| @Override |
| public void decodeBitmapRegion(Rect rect, int targetWidth, int targetHeight, |
| boolean shouldAdjustForRtl, BitmapReceiver receiver) { |
| receiver.onBitmapDecoded(null); |
| } |
| |
| @Override |
| public void decodeBitmap(int targetWidth, int targetHeight, |
| BitmapReceiver receiver) { |
| DecodeBitmapAsyncTask task = new DecodeBitmapAsyncTask(receiver, targetWidth, targetHeight); |
| task.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR); |
| } |
| |
| @Override |
| public boolean supportsTiling() { |
| return false; |
| } |
| |
| @Override |
| public void decodeRawDimensions(Activity unused, DimensionsReceiver receiver) { |
| DecodeDimensionsAsyncTask task = new DecodeDimensionsAsyncTask(receiver); |
| task.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR); |
| } |
| |
| private synchronized Drawable getCurrentWallpaperDrawable() { |
| if (mCurrentWallpaperDrawable != null) { |
| return mCurrentWallpaperDrawable; |
| } |
| WallpaperManager wallpaperManager = WallpaperManager.getInstance(mApplicationContext); |
| try { |
| mCurrentWallpaperDrawable = wallpaperManager.getDrawable(); |
| } catch (java.lang.SecurityException e) { |
| // Work around Samsung bug where SecurityException is thrown if device is still using |
| // its default wallpaper. |
| mCurrentWallpaperDrawable = wallpaperManager.getBuiltInDrawable(); |
| } |
| return mCurrentWallpaperDrawable; |
| } |
| |
| /** |
| * Decodes and then post-decode scales down the currently-set wallpaper bitmap. |
| */ |
| private class DecodeBitmapAsyncTask extends AsyncTask<Void, Void, Bitmap> { |
| |
| private BitmapReceiver mReceiver; |
| private int mTargetWidth; |
| private int mTargetHeight; |
| |
| public DecodeBitmapAsyncTask(BitmapReceiver receiver, int width, int height) { |
| mReceiver = receiver; |
| mTargetWidth = width; |
| mTargetHeight = height; |
| } |
| |
| @Override |
| protected Bitmap doInBackground(Void... unused) { |
| Drawable wallpaperDrawable = getCurrentWallpaperDrawable(); |
| Bitmap bitmap = ((BitmapDrawable) wallpaperDrawable).getBitmap(); |
| |
| // The final bitmap may be constrained by only one of height and width, so find the maximum |
| // downscaling factor without having the final result bitmap's height or width dip below the |
| // provided target height or width. |
| float maxDownscaleFactor = Math.min((float) bitmap.getWidth() / mTargetWidth, |
| (float) bitmap.getHeight() / mTargetHeight); |
| |
| // Scale down full bitmap to save memory consumption post-decoding, while maintaining the |
| // source bitmap's aspect ratio. |
| int resultWidth = Math.round(bitmap.getWidth() / maxDownscaleFactor); |
| int resultHeight = Math.round(bitmap.getHeight() / maxDownscaleFactor); |
| return Bitmap.createScaledBitmap(bitmap, resultWidth, resultHeight, FILTER_SCALED_BITMAP); |
| } |
| |
| @Override |
| protected void onPostExecute(Bitmap bitmap) { |
| mReceiver.onBitmapDecoded(bitmap); |
| } |
| } |
| |
| /** |
| * Decodes the raw dimensions of the currently-set wallpaper. |
| */ |
| private class DecodeDimensionsAsyncTask extends AsyncTask<Void, Void, Point> { |
| |
| private DimensionsReceiver mReceiver; |
| |
| public DecodeDimensionsAsyncTask(DimensionsReceiver receiver) { |
| mReceiver = receiver; |
| } |
| |
| @Override |
| protected Point doInBackground(Void... unused) { |
| Drawable wallpaperDrawable = getCurrentWallpaperDrawable(); |
| return new Point( |
| wallpaperDrawable.getIntrinsicWidth(), wallpaperDrawable.getIntrinsicHeight()); |
| } |
| |
| @Override |
| protected void onPostExecute(Point dimensions) { |
| mReceiver.onDimensionsDecoded(dimensions); |
| } |
| } |
| } |