Wischgeste in Fragment erkennen

Question

Hallo Ich habe eine Fragment implementiert, und ich möchte Touch-Ereignis auf meinem Fragment erkennen.

Aber ich bin nicht in der Lage, dieses Ereignis zu erkennen, in der Tat wird kein Ereignis überhaupt erkannt. Es funktioniert gut in Activity, aber es arbeitet nicht an Fragmenten.

Im Anschluss ist mein Code:

public class Swipe_Fragment extends Fragment implements 
    GestureDetector.OnGestureListener, GestureDetector.OnDoubleTapListener { 

private SimpleGestureFilter detector; 
private LinearLayout swipLinear; 
private static int DEFAULT = 50; 
private int brightness; 
private GestureDetectorCompat mDetector; 

@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, 
     Bundle savedInstanceState) { 
    View rootView = inflater.inflate(R.layout.swipe_screen, container, 
      false); 
    swipLinear = (LinearLayout) rootView.findViewById(R.id.swipLinear); 

    brightness = DEFAULT; 
    mDetector = new GestureDetectorCompat(getActivity(), this); 
    // Set the gesture detector as the double tap 
    // listener. 
    mDetector.setOnDoubleTapListener(this); 
    // Detect touched area 
    // detector = new SimpleGestureFilter(getActivity(), this); 
    return rootView; 
} 


@Override 
public boolean onDoubleTap(MotionEvent arg0) { 
    Toast.makeText(getActivity(), "onDoubleTap", Toast.LENGTH_LONG).show(); 
    return false; 
} 

@Override 
public boolean onDoubleTapEvent(MotionEvent e) { 
    Toast.makeText(getActivity(), "onDoubleTapEvent", Toast.LENGTH_LONG).show(); 
    return false; 
} 

@Override 
public boolean onSingleTapConfirmed(MotionEvent e) { 
    Toast.makeText(getActivity(), "onSingleTapConfirmed", Toast.LENGTH_LONG).show(); 
    return false; 
} 

@Override 
public boolean onDown(MotionEvent e) { 
    Toast.makeText(getActivity(), "onDown", Toast.LENGTH_LONG).show(); 
    return false; 
} 

@Override 
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, 
     float velocityY) { 
    Toast.makeText(getActivity(), "onFling", Toast.LENGTH_LONG).show(); 
    return false; 
} 

@Override 
public void onLongPress(MotionEvent e) { 
    Toast.makeText(getActivity(), "onLongPress", Toast.LENGTH_LONG).show(); 

} 

@Override 
public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, 
     float distanceY) { 
    Toast.makeText(getActivity(), "onScroll", Toast.LENGTH_LONG).show(); 
    return false; 
} 

@Override 
public void onShowPress(MotionEvent e) { 
    Toast.makeText(getActivity(), "onShowPress", Toast.LENGTH_LONG).show(); 

} 

@Override 
public boolean onSingleTapUp(MotionEvent e) { 
    Toast.makeText(getActivity(), "onSingleTapUp", Toast.LENGTH_LONG).show(); 
    return false; 
} 

} 

Answer 1

Endlich habe ich eine Lösung aus dem folgenden Code, der von Android Fragment onCreateView with Gestures ist.

final GestureDetector gesture = new GestureDetector(getActivity(), 
    new GestureDetector.SimpleOnGestureListener() { 

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

     @Override 
     public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, 
      float velocityY) { 
      Log.i(Constants.APP_TAG, "onFling has been called!"); 
      final int SWIPE_MIN_DISTANCE = 120; 
      final int SWIPE_MAX_OFF_PATH = 250; 
      final int SWIPE_THRESHOLD_VELOCITY = 200; 
      try { 
       if (Math.abs(e1.getY() - e2.getY()) > SWIPE_MAX_OFF_PATH) 
        return false; 
       if (e1.getX() - e2.getX() > SWIPE_MIN_DISTANCE 
        && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) { 
        Log.i(Constants.APP_TAG, "Right to Left"); 
       } else if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE 
        && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) { 
        Log.i(Constants.APP_TAG, "Left to Right"); 
       } 
      } catch (Exception e) { 
       // nothing 
      } 
      return super.onFling(e1, e2, velocityX, velocityY); 
     } 
    }); 

v.setOnTouchListener(new View.OnTouchListener() { 
    @Override 
    public boolean onTouch(View v, MotionEvent event) { 
     return gesture.onTouchEvent(event); 
    } 
}); 

geht dieser in den onCreateView() Verfahren des Fragments.