BitmapSource.java 文件源码

public TileImage getTileImage() {
    if (mIsGif) {
        return null;
    }

    BitmapFactory.Options options = new BitmapFactory.Options();
    options.inJustDecodeBounds = true;
    BitmapFactory.decodeFile(this.mFilePath, options);
    int width = options.outWidth;
    int height = options.outHeight;

    if (width <= 0 || height <= 0) {
        return null;
    }

    try {
        BitmapRegionDecoder bitmapRegionDecoder = BitmapRegionDecoder.newInstance(this.mFilePath, false);
        return TileImage.newInstance(width, height, OrientationInfoUtility.getOrientation(this.mFilePath), bitmapRegionDecoder);
    } catch (IOException e) {
        e.printStackTrace();
    }
    return null;
}