点击按钮时，Activity的onTouchEvent()方法没有被调用

Question

我希望在Activity.onTouchEvent()方法中进行一些B.logic操作。对于TextView和其他不可点击的视图，它可以正常工作。然而，在点击Button时它并没有被调用。但我也需要这个功能。

以下是代码：

public class MainActivity extends Activity {
    private static final String TAG = MainActivity.class.getSimpleName();
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        findViewById(R.id.button1).setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                Toast.makeText(MainActivity.this, "Oh shit!! click performed... :(", Toast.LENGTH_LONG).show();

            }
        });



    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        Log.d(TAG, "ssssssssssssssssssssssss:touch");
        return super.onTouchEvent(event);
    }

    public boolean dispatchTouchEvent(MotionEvent event) {
        int eventaction=event.getAction();

        switch(eventaction) {
        case MotionEvent.ACTION_MOVE:
            break;
        default:
            break;
        }

        return super.dispatchTouchEvent(event);
    }

}

请帮我整理一下。

- Noundla Sandeep

---

根据文档，只有在“当触摸屏事件未被其下面的任何视图处理时”，才会调用Activity.onTouchEvent()。由于您的按钮消耗/处理了触摸事件，因此活动未接收到调用。TextViews未消耗点击事件。您所观察到的行为是预期的行为。 - greg7gkb

我通过处理Activity.dispatchTouchEvent()方法添加了下面的解决方案。 - Noundla Sandeep

Answer 1

我已经按要求使用了dispatchTouchEvent(MotionEvent ev)。以下是解决方案。

private boolean isInSideClicked = false;
public boolean dispatchTouchEvent(MotionEvent event) {
    if (event.getAction() == MotionEvent.ACTION_DOWN) {
        View content = findViewById(R.id.textView1);
        int[] contentLocation = new int[2];
        content.getLocationOnScreen(contentLocation);
        Rect rect = new Rect(contentLocation[0], 
                             contentLocation[1], 
                             contentLocation[0] + content.getWidth(), 
                             contentLocation[1] + content.getHeight());
        
        View frame = findViewById(R.id.editText1);
        int[] frameLocation = new int[2];
        frame.getLocationOnScreen(frameLocation);
        Rect framerect = new Rect(frameLocation[0], 
                                  frameLocation[1], 
                                  frameLocation[0] + frame.getWidth(), 
                                  frameLocation[1] + frame.getHeight());
        Log.d(TAG, "rect:  "+rect.bottom+" , "+rect.top+" , "+rect.left+" , "+rect.right);
        Log.d(TAG, "FrameRect:  "+framerect.bottom+" , "+framerect.top+" , "+framerect.left+" , "+framerect.right);
        Log.d(TAG, "x: "+event.getX()+"  y: "+event.getY());
        
        if ((rect.contains((int)event.getX(), (int)event.getY()) || framerect.contains((int)event.getX(), (int)event.getY()) ) ) {
            isInSideClicked = true;
        }
        if (isInSideClicked){
            return super.dispatchTouchEvent(event); 
        } else {
            return true;
        }
    } else if (event.getAction() == MotionEvent.ACTION_UP && isInSideClicked) {
        isInSideClicked = false;
        return super.dispatchTouchEvent(event);
    } else if (event.getAction() == MotionEvent.ACTION_MOVE && isInSideClicked) {
        return super.dispatchTouchEvent(event);
    } else {
        isInSideClicked = false;
        return true; 
    }
}

以下是触摸事件在操作系统层面上的处理层级。

Activity.dispatchTouchEvent()
ViewGroup.dispatchTouchEvent()
View.dispatchTouchEvent()
View.onTouchEvent()
ViewGroup.onTouchEvent()
Activity.onTouchEvent()

通过这样做，我限制了未在所需布局/视图中的视图的触摸事件。

- Noundla Sandeep

---

非常好的解决方案。 - Sudhanshu Gaur

Answer 2

您在哪里为按钮注册了touchListener。您只为按钮实现了clickListener。要调用按钮的onTouchEvent（），您必须将按钮注册为：button.setOnTouchListener（this）;

- Ranjit

Answer 3

我曾经遇到过同样的问题。解决起来非常简单，而且不需要删除你的：

@Override
public boolean onTouchEvent(MotionEvent event) {
    Log.d(TAG, "ssssssssssssssssssssssss:touch");
    return super.onTouchEvent(event);
};

添加到按钮：

button.setOnTouchListener(new OnTouchListener() {

    @Override
    public boolean onTouch(View v, MotionEvent event) {
        //YOUR CODE HERE
        if(v==button){
           //Your button has been pressed
        }
        else {  
          //Other View element has been pressed
             }
    }
}

- Antonio Moreno Borras

Answer 4

 Please add below given 2 line in your xml hope it will help you its working fine for me.

    **android:focusable="false"
    android:focusableInTouchMode="false"**


     <Button
            android:id="@+id/button2"
            android:layout_width="80dp"
            android:layout_height="40dp"
            android:layout_alignParentRight="true"
            android:layout_below="@+id/button1"
            android:layout_marginTop="3dp"
            android:background="#FFFFFF"
            android:focusable="false"
            android:focusableInTouchMode="false"
            android:text="Delete"
            android:textColor="#0099CC" />

- Manish Srivastava

Answer 5

请在您的 onCreate 方法中添加以下代码。

在此，您可以获取按钮的按下、移动或释放事件。

编写您的逻辑以响应按钮释放事件。

findViewById(R.id.btn).setOnTouchListener(new OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {

            switch (event.getAction()) {
            case MotionEvent.ACTION_DOWN:
                Toast.makeText(Main.this,
                        "Oh shit!! click down performed... :(",
                        Toast.LENGTH_LONG).show();
                break;
            case MotionEvent.ACTION_MOVE:
                break;
            case MotionEvent.ACTION_UP:
                Toast.makeText(Main.this,
                        "Oh shit!! click up performed... :(",
                        Toast.LENGTH_LONG).show();
                break;
            default:
                break;
            }
            return true;
        }
    });

- Divyang Metaliya