Android Bitmap换背景颜色

public static Bitmap drawBg4Bitmap(int color, Bitmap orginBitmap) {
Paint paint = new Paint();
paint.setColor(color);
Bitmap bitmap = Bitmap.createBitmap(orginBitmap.getWidth(),
orginBitmap.getHeight(), orginBitmap.getConfig());
Canvas canvas = new Canvas(bitmap);
canvas.drawRect(0, 0, orginBitmap.getWidth(), orginBitmap.getHeight(), paint);
canvas.drawBitmap(orginBitmap, 0, 0, paint);
return bitmap;
}