CropAndSetWallpaperTask.java 文件源码

public boolean cropBitmap(int whichWallpaper) {
    Bitmap crop = mStreamProvider.readCroppedBitmap(
            mCropBounds, mOutWidth, mOutHeight, mRotation);
    if (crop == null) {
        return false;
    }

    boolean failure = false;
    // Compress to byte array
    ByteArrayOutputStream tmpOut = new ByteArrayOutputStream(2048);
    if (crop.compress(CompressFormat.JPEG, DEFAULT_COMPRESS_QUALITY, tmpOut)) {
        // Set the wallpaper
        try {
            byte[] outByteArray = tmpOut.toByteArray();
            WallpaperManagerCompat.getInstance(mContext).setStream(
                    new ByteArrayInputStream(outByteArray),
                    null, true, whichWallpaper);
            if (mOnBitmapCroppedHandler != null) {
                mOnBitmapCroppedHandler.onBitmapCropped(outByteArray);
            }
        } catch (IOException e) {
            Log.w(TAG, "cannot write stream to wallpaper", e);
            failure = true;
        }
    } else {
        Log.w(TAG, "cannot compress bitmap");
        failure = true;
    }
    return !failure; // True if any of the operations failed
}