Bitmap镜像

private Bitmap convertBitmap(Bitmap srcBitmap){
    int width = srcBitmap.getWidth();
    int height = srcBitmap.getHeight();

    Bitmap newBitmap = Bitmap.createBitmap(width,height, Bitmap.Config.ARGB_8888);

    Canvas canvas = new Canvas();
    Matrix matrix = new Matrix();

    matrix.postScale(-1,1);

    Bitmap newBitmap2 = Bitmap.createBitmap(srcBitmap,0,0,width,height,matrix,true);

    canvas.drawBitmap(newBitmap2,
            new Rect(0,0,width,height),
            new Rect(0,0,width,height),null);

    return newBitmap2;

}