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;

        }

    }