PhotoViewAttacher.java 文件源码

/**
 * Set's the ImageView's ScaleType to Matrix.
 */
private static void setImageViewScaleTypeMatrix(ImageView imageView) {
    /**
     * PhotoView sets it's own ScaleType to Matrix, then diverts all calls
     * setScaleType to this.setScaleType automatically.
     */
    if (null != imageView && !(imageView instanceof IPhotoView)) {
        if (!ScaleType.MATRIX.equals(imageView.getScaleType())) {
            imageView.setScaleType(ScaleType.MATRIX);
        }
    }
}