Release Note:

0.0.1

• support Both LEFT and RIGHT side swipe.
• support more callback

How to use:

• 1. Add dependency:

        implementation 'com.lovejjfg:swipeback:latestVersion'
     

• 1. Create Your SwipeBackHelper in Layout like this:

        private val swipeBackHelper: SwipeBackHelper =
            SwipeBackHelper(this, object : Callback() {
                override fun onBackReleased() {
                    (getContext() as? Activity)?.finish()
                }
            })
     

• 1. Override method:

        override fun onInterceptTouchEvent(ev: MotionEvent?): Boolean {
             return swipeBackHelper.onInterceptTouchEvent(ev) || super.onInterceptTouchEvent(ev)
        }
     
        override fun onTouchEvent(ev: MotionEvent?): Boolean {
            return swipeBackHelper.onTouchEvent(ev) || super.onTouchEvent(ev)
        }
     
        override fun dispatchDraw(canvas: Canvas?) {
            super.dispatchDraw(canvas)
            swipeBackHelper.onDispatchDraw(canvas)
        }
     

• 1. Callback Methods:

        /**
         * Callback release when the shape is fully showed.
         */
        fun onBackReleased(type: Int) = Unit
     
        /**
         * Callback current percent when swipe or release, size change in [0f,1f].
         */
        fun onShapeChange(percent: Float) = Unit
     
        /**
         * Callback the Shape's color, Default color is FUll BLACK because is's match to the screen border.
         */
        @ColorInt
        fun getShapeColor(): Int = Color.BLACK
     
        /**
         * Callback the Shape's alpha , Default value is 255. */
        @IntRange(from = 0, to = 255)
        fun getShapeAlpha(): Int = SHAPE_DEFAULT_ALPHA
     
        /**
         * Callback whether change the shape's alpha during swiping, Default is depend on current alpha is full (255).
         */
        fun isShapeAlphaGradient(): Boolean = getShapeAlpha() != SHAPE_DEFAULT_ALPHA
     
        /**
         * Callback the max peak size of the shape NOTE: it's not a exact value.
         */
        fun getShapeMaxPeak(): Float = 0f
     
        /**
         * Callback the Arrow color, the Arrow size width and so on are depend on method getShapeMaxPeak(),
         * DEFAULT color is WHITE.
         */
        @ColorInt
        fun getArrowColor(): Int = Color.WHITE
     
        /**
         * Callback the Edge size DEFAULT is 24dp.
         */
        fun getEdgeSize(): Float = -1F
     
        /**
         * Callback the support edge swipe side，support EDGE_LEFT EDGE_RIGHT or both.
         */
        @IntRange(from = 1, to = 3)
        fun getEdgeTrackingEnabled(): Int = EDGE_LEFT
     

PS: It's Kotlin lib, so you should SUPPORT Kotlin at first!