如何在画布圈中设置imageview或图标？

public class MainActivity extends AppCompatActivity implements View.OnTouchListener {
    private ImageView imageView;
    private float lastX, lastY;
    private float offsetX, offsetY;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        imageView = findViewById(R.id.imageView);
        imageView.setOnTouchListener(this);
    }

    @Override
    public boolean onTouch(View v, MotionEvent event) {
        switch (event.getAction()) {
            case MotionEvent.ACTION_DOWN:
                lastX = event.getRawX();
                lastY = event.getRawY();
                break;
            case MotionEvent.ACTION_MOVE:
                offsetX = event.getRawX() - lastX;
                offsetY = event.getRawY() - lastY;
                imageView.setX(imageView.getX() + offsetX);
                imageView.setY(imageView.getY() + offsetY);
                lastX = event.getRawX();
                lastY = event.getRawY();
                break;
            case MotionEvent.ACTION_UP:
                // 处理手指抬起的操作
                break;
        }
        return true;
    }
}