Bitmap添加背景色

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;