java 如何为整个屏幕设置 OnTouchListener？

How to set OnTouchListener for the entire screen?

提问by Lemon Juice

Please have a look at the following code. I am only posting the important sections of the code.

请看下面的代码。我只发布代码的重要部分。

activity_game.xml

活动游戏.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/fullView"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".Game" >

    <TextView
        android:id="@+id/numberOfQuestionsLeft"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_marginLeft="20dp"
        android:text="TextView" />
</RelativeLayout>

Game.java

游戏.java

public class Game extends Activity {



    private View fullView;

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

        fullView = (View)findViewById(R.id.fullView);
        fullView.setOnTouchListener(imageViewSwiped);



    }


 OnTouchListener imageViewSwiped = new OnSwipeTouchListener()
    {
         public boolean onSwipeRight() 
         {
            //code removed
         }

          public boolean onSwipeLeft() 
          {
             //code removed
                return true;
          }

          public boolean onSwipeBottom()
          {
              //code removed
              return true;
          }


    };
}

OnSwipTouchListener.java

OnSwipTouchListener.java

Note - I do not own this class of the code. It is written by another SO member.

注意 - 我不拥有此类代码。它是由另一个 SO 成员编写的。

  package game.Game;
    import android.view.GestureDetector;
    import android.view.GestureDetector.SimpleOnGestureListener;
    import android.view.MotionEvent;
    import android.view.View;
    import android.view.View.OnTouchListener;

    public class OnSwipeTouchListener implements OnTouchListener {

        private final GestureDetector gestureDetector = new GestureDetector(new GestureListener());

        public boolean onTouch(final View v, final MotionEvent event) {
            return gestureDetector.onTouchEvent(event);
        }

        private final class GestureListener extends SimpleOnGestureListener {

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

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

            @Override
            public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
                boolean result = false;
                try {
                    float diffY = e2.getY() - e1.getY();
                    float diffX = e2.getX() - e1.getX();
                    if (Math.abs(diffX) > Math.abs(diffY)) {
                        if (Math.abs(diffX) > SWIPE_THRESHOLD && Math.abs(velocityX) > SWIPE_VELOCITY_THRESHOLD) {
                            if (diffX > 0) {
                                result = onSwipeRight();
                            } else {
                                result = onSwipeLeft();
                            }
                        }
                    } else {
                        if (Math.abs(diffY) > SWIPE_THRESHOLD && Math.abs(velocityY) > SWIPE_VELOCITY_THRESHOLD) {
                            if (diffY > 0) {
                                result = onSwipeBottom();
                            } else {
                                result = onSwipeTop();
                            }
                        }
                    }
                } catch (Exception exception) {
                    exception.printStackTrace();
                }
                return result;
            }
        }

        public boolean onSwipeRight() {
            return false;
        }

        public boolean onSwipeLeft() {
            return false;
        }

        public boolean onSwipeTop() {
            return false;
        }

        public boolean onSwipeBottom() {
            return false;
        }
    }

Now, I am trying to make the make the WHOLE ACTIVITY touched enabled. Please view Game.javato see how I did it. But the problem is, it is not reacting to any kind of touch event! There is nothing wrong with the code OnSwipTouchListener.javabecause I have used the touch events of this by setting the listener to an image view.

现在，我正在尝试启用整个 ACTIVITY 触摸功能。请查看Game.java我是如何做到的。但问题是，它不会对任何类型的触摸事件做出反应！代码没有任何问题，OnSwipTouchListener.java因为我通过将侦听器设置为image view.

There must be a problem where I am trying to make the whole activity touch enabled. By saying "Whole Activity Touch Enabled" what I mean is, I need to swipe across the whole screen instead of adding the listener to an imageview.

一定有问题，我试图使整个活动触摸启用。通过说“启用整个活动触摸”，我的意思是，我需要在整个屏幕上滑动而不是将侦听器添加到imageview.

What have I done wrong here?

我在这里做错了什么？

回答by Piseth Sok

This is my example:

这是我的例子：

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        super.onTouchEvent(event);
        float x = event.getX();
        float y = event.getY();
        Toast.makeText(Example.this, "x=" + x + " y="+ y,
                Toast.LENGTH_SHORT).show();
        return false;
    }

Hope this is helpful to someone! Cheer!

希望这对某人有帮助！欢呼！

回答by Dreamer

As requested by the Questioner, the solution is at the answers to this question ontouchlistener-doesnt-work-with-relative-layout

根据提问者的要求，解决方案是在这个问题上的答案ontouchlistener-doesnt-work-with-relative-layout

回答by Gabe Sechan

Add the TouchListener to the highest level layout of your activity. That will catch any touches not handled elsewhere.

将 TouchListener 添加到您的活动的最高级别布局。这将捕获其他地方未处理的任何触摸。

回答by Mena

Is your RelativeLayout focusable?

你的 RelativeLayout 是可聚焦的吗？

android:focusable="true"

and/or

和/或

android:focusableInTouchMode="true"