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
  •  臣服心动
    2021-02-06 17:52

    in addition to @Mirek Rusin answer

    OnSwipeTouchListener.java:

    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;
    
        public OnSwipeTouchListener (Context ctx){
            gestureDetector = new GestureDetector(ctx, new GestureListener());
        }
    
        @Override
        public boolean onTouch(View v, 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 true;
            }
    
            @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) {
                                onSwipeRight();
                            } else {
                                onSwipeLeft();
                            }
                            result = true;
                        }
                    }
                    else if (Math.abs(diffY) > SWIPE_THRESHOLD && Math.abs(velocityY) > SWIPE_VELOCITY_THRESHOLD) {
                        if (diffY > 0) {
                            onSwipeBottom();
                        } else {
                            onSwipeTop();
                        }
                        result = true;
                    }
                } catch (Exception exception) {
                    exception.printStackTrace();
                }
                return result;
            }
        }
    
        public void onSwipeRight() {
        }
    
        public void onSwipeLeft() {
        }
    
        public void onSwipeTop() {
        }
    
        public void onSwipeBottom() {
        }
    }
    

    Usage on your activity : define a layout (Linear or relative or anything even a toolbar or an image..)

    yourLayout.setOnTouchListener(new OnSwipeTouchListener(MyActivity.this) {
    public void onSwipeTop() {
        Toast.makeText(MyActivity.this, "top", Toast.LENGTH_SHORT).show();
    }
    public void onSwipeRight() {
        startActivity(new Intent(MyActivity.this,NewActivity.class));
                finish();
    }
    public void onSwipeLeft() {
        Toast.makeText(MyActivity.this, "left", Toast.LENGTH_SHORT).show();
    }
    public void onSwipeBottom() {
        Toast.makeText(MyActivity.this, "bottom", Toast.LENGTH_SHORT).show();
    }
    
    });
    

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