swipe-touch-listener

Simple touch listener for swiping gestures.

Getting Started

Installing

Add to your .gradle file

allprojects {
    repositories {
        ...
        maven { url 'https://jitpack.io' }
    }
}
    
dependencies {
        implementation 'com.github.colorgreen:swipe-touch-listener:v1.3'
}

Usage

• First create listener

OnSwipeTouchListener listener = new OnSwipeTouchListener();

• Then create SwipeAction

SwipeAction swipeAction = new SwipeAction();

• Create listener

swipeAction.setSwipeActionListener( new SwipeActionListener() {
    @Override
    public void onDragStart( float val, float totalFriction ) {}

    @Override
    public void onDrag( float val, float friction ) {
        bar.setLayoutParams( new RelativeLayout.LayoutParams( bar.getWidth(), (int) val ) );
        bar.setBackgroundColor( interpolateColor( lightBlue, darkBlue, val / targetHeight ) );
    }

    @Override
    public void onDragEnd( float val, float totalFriction ) {
        // use setBlocked() for blocking another panels from extending
        bottomSwipeAction.setBlocked( swipeAction.isExtended() );
    }
} );

You can override functions like onDragStart, onDrag and onDragEnd. onDragEnd is invoked only when val reach step. Set properties for action.

swipeAction.setDirection( SwipeAction.DragDirection.Down );
swipeAction.setSteps( new float[]{ startBarHeight, targetHeight * 0.3f, targetHeight } );
swipeAction.setDragThreshold( 0.4f );

Threshold is distance in percent between steps above which we accept drag and value will be automatically animated to next step. For example steps are [ 200,700 ], threshold is 0.2f, so if we drag over 300 ( (700-200)*0.2f) ) value will be animated to 700, else back to 300.

• Add action to listener

listener.addAction( swipeAction );

We can add multiple actions to listener. See example app for this case. But no more than one view can be extended simultaneously.

• And attach listener to view

listener.attachToView( view );
//... or
view.setOnTouchListener( listener );

Other functions

• setBlocked( boolean )
• pushToStep( int stepIndex )
• expand()
• collapse()
• isExtended()

Authors

@colorgreen

Version History

• v1.4
  • Changed to raw axis (no problem on moving panel with attached OnSwipeTouchListener)
  • javadoc support
• v1.3
  • Swipe action is based now on listener
  • Addes expand, collapse and pushToStep method which allow to control elements without swipe
• v1.2
  • Friction fix
• v1.1
  • Added friction in onDrag
• v1.0
  • Initial Release

Licence

Free to use