Android onTouchEvent（MotionEvent事件）在自定义视图中不起作用

我编写了以下代码。当我只想触摸

矩形

对象时，我会看到

大矩形

对象。但是当我只想使用

矩形

对象触摸时，我在屏幕上看不到

大矩形

对象。请帮帮我

public class MainActivity extends Activity {
    Rectangle rectangle;

    @Override
    protected void onCreate(Bundle bundle) {
        super.onCreate(bundle);
        rectangle = new Rectangle(this);
        setContentView(rectangle);

    }

}

class Rectangle extends View {
    Paint paint;

    Rectangle(Context context) {
        super(context);
        paint = new Paint();
    }
@Override
public boolean onTouchEvent(MotionEvent event) {
    new Larger_Rectangle(getContext());

    return true;
}
    @Override
    public void onDraw(Canvas canvas) {
        paint.setColor(Color.RED);
        canvas.drawRect(10, 30, 50, 70, paint);
    }

}

 class Larger_Rectangle extends View {
    Paint paint;

    Larger_Rectangle(Context context) {
        super(context);
        paint = new Paint();
    }

    @Override
    public void onDraw(Canvas canvas) {
        paint.setColor(Color.BLUE);
        canvas.drawRect(60,100,120,150,paint);
    }

}

---

步骤1-制作一个如下所示的类：

public class OnTouchListener implements OnTouchListener {

    private final GestureDetector gestureDetector;

    public OnTouchListener (Context ctx){
        gestureDetector = new GestureDetector(ctx, new OnTouchViewListener());
    }

    private final class OnTouchViewListener extends SimpleOnGestureListener {

        private static final int SWIPE_THRESHOLD = 100;
        private static final int SWIPE_VELOCITY_THRESHOLD = 100;

        @Override
        public boolean onDown(MotionEvent e) {
            return true;
        }

        @Override
        public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
            boolean result = false;
            onTouchView();
            return result;
        }
    }

    public void onTouchView() {
    }



    @Override
    public boolean onTouch(View v, MotionEvent event) {
        this.gestureDetector.onTouchEvent(event);
        return false;
    }
}

步骤2-然后在活动课上：

@Override
    protected void onCreate(Bundle bundle) {
        super.onCreate(bundle);
        rectangle = new Rectangle(this);
        setContentView(rectangle);

        rectangle.setOnTouchListener(new OnTouchListener(context){
            @Override
            public void onTouchView() {
                // TODO Auto-generated method stub
                super.onTouchView();
               //do whatever you want to do
            }

        });
}

---

“

new Large_Rectangle（getContext（））；

”它是干什么用的？因为我只想在触摸

Rectangle

对象时，我在屏幕上看到

Large_Rectangle

。有关自定义视图的更多信息，请阅读：@stackoverflow:this'new Large_Rectangle（getContext（））；”将只创建一个对象。“不要将其附加到任何UI元素”。。！！您必须将矩形附加到父布局才能使其工作。创建父布局。在OnTouch方法中使用addView将矩形添加到父布局