added: BalloonWindowListener

BalloonWindow/src/main/java/com/ht/balloonwindow/BalloonWindow.kt

@@ -35,9 +35,14 @@ class BalloonWindow : PopupWindow {
 
     var balloonColor: Int? = null
 
+    var x: Int = 0
+    var y: Int = 0
+
     private var measuredContentsWidth: Int? = null
     private var measuredContentsHeight: Int? = null
 
+    var listener: BalloonWindowListener? = null
+
     constructor(context: Context, targetView: View, position: Position, offset: Int = 0) : super(context) {
         this.context = context
         this.position = position
@@ -49,26 +54,28 @@ class BalloonWindow : PopupWindow {
     }
 
     override fun dismiss() {
+        listener?.willDisappear(this)
+
         val animation = AlphaAnimation(1f, 0f)
         animation.duration = 100
         contentView.startAnimation(animation)
         animation.setAnimationListener(object: Animation.AnimationListener{
             override fun onAnimationRepeat(p0: Animation?) {}
 
             override fun onAnimationEnd(p0: Animation?) {
-                exit()
+                super@BalloonWindow.dismiss()
+
+                listener?.didDisappear(this@BalloonWindow)
             }
 
             override fun onAnimationStart(p0: Animation?) {
             }
         })
     }
 
-    fun exit() {
-        super.dismiss()
-    }
-
     fun show(view: View) {
+        listener?.willAppear(this)
+
         contentView = BalloonView(context, view)
         val balloonView = (contentView as BalloonView)
         balloonView.contentsLl.setPadding(
@@ -84,6 +91,10 @@ class BalloonWindow : PopupWindow {
         paddingBottom = bottom
     }
 
+    fun setBalloonListener(listener: BalloonWindowListener) {
+        this.listener = listener
+    }
+
     private fun getAbsolutePosition(view: View): Pair<Int, Int> {
         val locations = IntArray(2)
         view.getLocationOnScreen(locations)
@@ -137,9 +148,22 @@ class BalloonWindow : PopupWindow {
 
         update(xPos, yPos, this@BalloonWindow.width, this@BalloonWindow.height)
 
+        x = xPos
+        y = yPos
         val anim = ScaleAnimation(0f, 1f, 0f, 1f, Animation.RELATIVE_TO_SELF, pivotX, Animation.RELATIVE_TO_SELF, pivotY)
         anim.duration = 300
         contentView.startAnimation(anim)
+        anim.setAnimationListener(object: Animation.AnimationListener{
+            override fun onAnimationStart(p0: Animation?) {
+            }
+
+            override fun onAnimationRepeat(p0: Animation?) {
+            }
+
+            override fun onAnimationEnd(p0: Animation?) {
+                listener?.didAppear(this@BalloonWindow)
+            }
+        })
     }
 
     inner class BalloonView: ConstraintLayout {
@@ -177,6 +201,7 @@ class BalloonWindow : PopupWindow {
                         set.connect(R.id.contentsLl, ConstraintSet.RIGHT, R.id.container, ConstraintSet.RIGHT)
                     set.applyTo(container)
 
+
                     arrowTopIv.visibility = View.VISIBLE
                     arrowRightIv.visibility = View.GONE
                 }

BalloonWindow/src/main/java/com/ht/balloonwindow/BalloonWindowListener.kt

@@ -0,0 +1,19 @@
+package com.ht.balloonwindow
+
+interface BalloonWindowListener {
+    fun willAppear(window: BalloonWindow) {
+
+    }
+
+    fun didAppear(window: BalloonWindow) {
+
+    }
+
+    fun willDisappear(window: BalloonWindow) {
+
+    }
+
+    fun didDisappear(window: BalloonWindow) {
+
+    }
+}

app/src/main/java/com/ht/example/balloonwindow/MainActivity.kt

@@ -1,12 +1,18 @@
 package com.ht.example.balloonwindow
 
+import android.animation.ValueAnimator
 import android.graphics.Color
 import android.support.v7.app.AppCompatActivity
 import android.os.Bundle
 import android.support.v4.content.ContextCompat
+import android.util.Log
 import android.widget.TextView
 import com.ht.balloonwindow.BalloonWindow
+import com.ht.balloonwindow.BalloonWindowListener
 import kotlinx.android.synthetic.main.activity_main.*
+import kotlin.math.PI
+import kotlin.math.sign
+import kotlin.math.sin
 
 class MainActivity : AppCompatActivity() {
 
@@ -23,7 +29,22 @@ class MainActivity : AppCompatActivity() {
             window.offset = -35
             window.show(view)
 
+            val anim = ValueAnimator.ofFloat(0f, PI.toFloat())
+            anim.duration = 1500
+            anim.repeatCount = 3
+
+            window.setBalloonListener(object: BalloonWindowListener {
+                override fun didAppear(window: BalloonWindow) {
+                    anim.addUpdateListener {
+                        val value = it.animatedValue as Float
+                        val sign = sin(value)
+                        window.update(window.x, (window.y + (30 * sign)).toInt(), window.width, window.height)
+                    }
+                    anim.start()
+                }
+            })
         }
+
         belowBtn.setOnClickListener {
             val view = TextView(this)
             view.text = "position:below\noffset:55\nmargin:25\nballoonColor: #f1f1f1"