Multi-Touch Gestures(Java) for detecting custom gestures

Add the jitpack maven repository

allprojects {
  repositories {
    ...
    maven { url 'https://jitpack.io' }
  }
}

Add the dependency

dependencies {
  implementation 'com.github.slaviboy:MultiTouchGestures:v0.1.0'
}

Set up your view(it can be whatever view type you want) using xml

<View
  android:id="@+id/gesture_view"
  android:layout_width="match_parent"
  android:layout_height="match_parent"/>

Create your gesture detector object using java

// init multi finger gesture detector
GestureDetector detector = new GestureDetector();

// attach gesture detector listener to your view
View view = findViewById(R.id.gesture_view);
view.setOnTouchListener(detector);

detector.setOnGestureListener(new GestureDetector.OnGestureListener() {
  @Override
  public void onStateChange(Finger[] fingers, int fingerIndex) {

  }
});

At any moment in time, each finger has a current state. Using those states for multiple fingers, you can form multi-touch gesture.

• NONE
• SWIPE UP
• SWIPE DOWN
• SWIPE LEFT
• SWIPE RIGHT
• HOLD_DOWN
• DOWN
• UP
• MOVE UP
• MOVE DOWN
• MOVE LEFT
• MOVE RIGHT
• DOUBLE TAP

• holdDownDelay - (default:100) delay time(ms) after which if finger is -hold down, state will be changed to HOLD_DOWN
• upDelay - (default:50) delay time(ms), after which if finger is -swiped, state will be changed to UP
• consumeTouchEvents - (default:true) whether to consume touch event after handling
• numberOfFingers - (default:2) number of allowed fingers, that will be detected

• minDistanceSwipe - (default:10) minimum distance finger must travel, before swipe can be detected
• maxDurationSwipe - (default:400) maximum time after which swipe WILL NOT be detected (ms)
• minDistanceMove - (default:30) minimum distance finger must travel, before move can be detected
• maxDurationDoubleTap - (default:250) maximum delay time between the two -down events for the double tap (ms)
• maxDownDoubleTap - (default:100) maximum time the finger can be hold down for the two -down events (ms)
• slopeIntolerance - (default:1) slope intolerance for swipe and move