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      1 /**
      2  * Copyright (C) 2015 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.wallpaperpicker.common;
     17 
     18 import android.content.Context;
     19 import android.graphics.Bitmap;
     20 import android.graphics.Bitmap.CompressFormat;
     21 import android.graphics.RectF;
     22 import android.os.AsyncTask;
     23 import android.util.Log;
     24 import android.widget.Toast;
     25 
     26 import com.android.wallpaperpicker.R;
     27 
     28 import java.io.ByteArrayInputStream;
     29 import java.io.ByteArrayOutputStream;
     30 import java.io.IOException;
     31 
     32 public class CropAndSetWallpaperTask extends AsyncTask<Integer, Void, Boolean> {
     33 
     34     public interface OnBitmapCroppedHandler {
     35         void onBitmapCropped(byte[] imageBytes);
     36     }
     37 
     38     public interface OnEndCropHandler {
     39         void run(boolean cropSucceeded);
     40     }
     41 
     42     private static final int DEFAULT_COMPRESS_QUALITY = 90;
     43     private static final String TAG = "CropAndSetWallpaperTask";
     44 
     45     private final InputStreamProvider mStreamProvider;
     46     private final Context mContext;
     47 
     48     private final RectF mCropBounds;
     49     private int mOutWidth, mOutHeight;
     50     private int mRotation;
     51     private CropAndSetWallpaperTask.OnEndCropHandler mOnEndCropHandler;
     52     private CropAndSetWallpaperTask.OnBitmapCroppedHandler mOnBitmapCroppedHandler;
     53 
     54     public CropAndSetWallpaperTask(InputStreamProvider streamProvider, Context context,
     55                                    RectF cropBounds, int rotation, int outWidth, int outHeight,
     56                                    OnEndCropHandler onEndCropHandler) {
     57         mStreamProvider = streamProvider;
     58         mContext = context;
     59 
     60         mCropBounds = cropBounds;
     61         mRotation = rotation;
     62         mOutWidth = outWidth;
     63         mOutHeight = outHeight;
     64         mOnEndCropHandler = onEndCropHandler;
     65     }
     66 
     67     public void setOnBitmapCropped(CropAndSetWallpaperTask.OnBitmapCroppedHandler handler) {
     68         mOnBitmapCroppedHandler = handler;
     69     }
     70 
     71     public boolean cropBitmap(int whichWallpaper) {
     72         Bitmap crop = mStreamProvider.readCroppedBitmap(
     73                 mCropBounds, mOutWidth, mOutHeight, mRotation);
     74         if (crop == null) {
     75             return false;
     76         }
     77 
     78         boolean failure = false;
     79         // Compress to byte array
     80         ByteArrayOutputStream tmpOut = new ByteArrayOutputStream(2048);
     81         if (crop.compress(CompressFormat.JPEG, DEFAULT_COMPRESS_QUALITY, tmpOut)) {
     82             // Set the wallpaper
     83             try {
     84                 byte[] outByteArray = tmpOut.toByteArray();
     85                 WallpaperManagerCompat.getInstance(mContext).setStream(
     86                         new ByteArrayInputStream(outByteArray),
     87                         null, true, whichWallpaper);
     88                 if (mOnBitmapCroppedHandler != null) {
     89                     mOnBitmapCroppedHandler.onBitmapCropped(outByteArray);
     90                 }
     91             } catch (IOException e) {
     92                 Log.w(TAG, "cannot write stream to wallpaper", e);
     93                 failure = true;
     94             }
     95         } else {
     96             Log.w(TAG, "cannot compress bitmap");
     97             failure = true;
     98         }
     99         return !failure; // True if any of the operations failed
    100     }
    101 
    102     @Override
    103     protected Boolean doInBackground(Integer... whichWallpaper) {
    104         return cropBitmap(whichWallpaper[0]);
    105     }
    106 
    107     @Override
    108     protected void onPostExecute(Boolean cropSucceeded) {
    109         if (!cropSucceeded) {
    110             Toast.makeText(mContext, R.string.wallpaper_set_fail, Toast.LENGTH_SHORT).show();
    111         }
    112         if (mOnEndCropHandler != null) {
    113             mOnEndCropHandler.run(cropSucceeded);
    114         }
    115     }
    116 }