Android 动态改变图片的颜色值

public void onViewClicked(View view) {
        switch (view.getId()) {
            case R.id.bt1:
                img1.setColorFilter(getResources().getColor(R.color.color3));
                break;
            case R.id.bt2:
                img1.setColorFilter(getResources().getColor(R.color.color1));
                break;
            case R.id.bt3:
                img1.setColorFilter(getResources().getColor(R.color.color2));
                break;
        }

    }