这是由于Android模拟器在API 30上的一个已知问题。解决方法是在代码中手动启用多点触摸。下面是代码示例：

public class MainActivity extends AppCompatActivity implements View.OnTouchListener {
    private int MAX_TOUCHES = 2 // 设置最大触摸点数，此处为2点触控

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        View view = findViewById(R.id.my_view);
        view.setOnTouchListener(this);

        // 添加代码以启用多点触摸
        view.setClickable(true);
        view.setLongClickable(true);
        view.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View view, MotionEvent motionEvent) {
                int pointerCount = motionEvent.getPointerCount();
                if (pointerCount > MAX_TOUCHES) {
                    pointerCount = MAX_TOUCHES;
                }
                for (int i = 0; i < pointerCount; i++) {
                    int pointerId = motionEvent.getPointerId(i);
                    int action = motionEvent.getActionMasked();
                    int x = (int) motionEvent.getX(i);
                    int y = (int) motionEvent.getY(i);
                    switch (action) {
                        case MotionEvent.ACTION_DOWN:
                        case MotionEvent.ACTION_POINTER_DOWN:
                            // 添加代码以处理多点触摸按下事件
                            break;
                        case MotionEvent.ACTION_MOVE:
                            // 添加代码以处理多点触摸移动事件
                            break;
                        case MotionEvent.ACTION_UP:
                        case MotionEvent.ACTION_POINTER_UP:
                            // 添加代码以处理多点触摸抬起事件
                            break;
                    }
                }
                return true;
            }
        });
    }

    @Override
    public boolean onTouch(View view, MotionEvent motionEvent) {
        // 在此处添加您的触摸事件处理代码
        return true;
    }
}