Swipe Android Library

To detect swipe events using RxJava, follow these steps:

1. Declare a Swipe instance and a Disposable in your Activity.
2. Initialize Swipe and subscribe to its observe() method. The observable emits SwipeEvent enum values.
3. Override dispatchTouchEvent(MotionEvent event) to pass touch events to the Swipe instance.
4. Dispose of the Disposable in onPause() to prevent memory leaks.

Available SwipeEvent values:

• SWIPING_LEFT / SWIPED_LEFT
• SWIPING_RIGHT / SWIPED_RIGHT
• SWIPING_UP / SWIPED_UP
• SWIPING_DOWN / SWIPED_DOWN

// Step 1: Declare
private Swipe swipe;
private Disposable disposable;

// Step 2: Initialize and subscribe
@Override protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);

  swipe = new Swipe();
  disposable = swipe.observe()
      .subscribeOn(Schedulers.computation())
      .observeOn(AndroidSchedulers.mainThread())
      .subscribe(swipeEvent -> info.setText(swipeEvent.toString()));
}

// Step 3: Pass events
@Override public boolean dispatchTouchEvent(MotionEvent event) {
  swipe.dispatchTouchEvent(event);
  return super.dispatchTouchEvent(event);
}

// Step 4: Dispose
@Override protected void onPause() {
  super.onPause();
  if (disposable != null && !disposable.isDisposed()) {
    disposable.dispose();
  }
}

To detect swipe events using a listener, follow these steps:

1. Declare a Swipe instance in your Activity.
2. Initialize Swipe and provide a SwipeListener implementation. The listener provides callbacks for both the active swiping state (onSwiping...) and the completed swipe state (onSwiped...).
3. Override dispatchTouchEvent(MotionEvent event) in your Activity to pass touch events to the Swipe instance.

If you only need to react to a subset of events, extend SimpleSwipeListener instead of implementing the full SwipeListener interface.

// Step 1: Declare
private Swipe swipe;

// Step 2: Initialize and set listener
@Override protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);

  swipe = new Swipe();
  swipe.setListener(new SwipeListener() {
    @Override public void onSwipingLeft(final MotionEvent event) { /* ... */ }
    @Override public void onSwipedLeft(final MotionEvent event) { /* ... */ }
    // ... other methods
  });
}

// Step 3: Pass events
@Override public boolean dispatchTouchEvent(MotionEvent event) {
  swipe.dispatchTouchEvent(event);
  return super.dispatchTouchEvent(event);
}