Android: How to swipe between activities (not fragments), master/detail best set-up

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猫巷女王i
猫巷女王i 2021-02-06 17:11

I\'m working on an android app and I\'m fairly new to all this, including mobile app development, so I have a few questions. Any help would be amazing!

1) Is it possible

4条回答
  •  青春惊慌失措
    2021-02-06 17:50

    Yes swiping is possible:

    OnTouchSwipeListener

    import android.content.Context;
    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;
    private Context context;
    
    /* (non-Javadoc)
     * @see android.view.View.OnTouchListener#onTouch(android.view.View, android.view.MotionEvent)
     */
    public boolean onTouch(final View view, final MotionEvent motionEvent) {
        return gestureDetector.onTouchEvent(motionEvent);
    }
    
    /**
     * Gets the gesture detector.
     * 
     * @return the gesture detector
     */
    public GestureDetector getGestureDetector(){
        return  gestureDetector;
    }
    
    /**
     * Instantiates a new on swipe touch listener.
     * 
     * @param context
     *            the context
     */
    public OnSwipeTouchListener(Context context) {
        super();
        this.context = context;
        gestureDetector = new GestureDetector(context, new GestureListener());
    }
    
    private final class GestureListener extends SimpleOnGestureListener {
    
        private static final int SWIPE_THRESHOLD = 100;
        private static final int SWIPE_VELOCITY_THRESHOLD = 100;
    
        /* (non-Javadoc)
         * @see android.view.GestureDetector.SimpleOnGestureListener#onDown(android.view.MotionEvent)
         */
        @Override
        public boolean onDown(MotionEvent e) {
            return true;
        }
    
        /* (non-Javadoc)
         * @see android.view.GestureDetector.SimpleOnGestureListener#onFling(android.view.MotionEvent, android.view.MotionEvent, float, float)
         */
    
        @Override
        public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
            boolean result = false;
            try {
                float diffY = e2.getRawY() - e1.getRawY();
                float diffX = e2.getRawX() - e1.getRawX();
                if ((Math.abs(diffX) - Math.abs(diffY)) > SWIPE_THRESHOLD) {
                    if (Math.abs(diffX) > SWIPE_THRESHOLD && Math.abs(velocityX) > SWIPE_VELOCITY_THRESHOLD) {
                        if (diffX > 0) {
                            onSwipeRight();
                        } else {
                            onSwipeLeft();
                        }
                    }
                } else {
                    if (Math.abs(diffY) > SWIPE_THRESHOLD && Math.abs(velocityY) > SWIPE_VELOCITY_THRESHOLD) {
                        if (diffY > 0) {
                            onSwipeBottom();
                        } else {
                            onSwipeTop();
                        }
                    }
                }
            } catch (Exception e) {
    
            }
            return result;
        }
    }
    
    /**
     * On swipe right.
     */
    public void onSwipeRight() {
    }
    
    /**
     * On swipe left.
     */
    public void onSwipeLeft() {
    }
    
    /**
     * On swipe top.
     */
    public void onSwipeTop() {
    }
    
    /**
     * On swipe bottom.
     */
    public void onSwipeBottom() {
    }
    }
    

    Implementation:

    OnSwipeTouchListener onSwipeTouchListener = new OnSwipeTouchListener(Activity.this) {
            @Override
            public void onSwipeLeft() {
                //your actions
            }
        };
    

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