Add reusable classes extending AnimatorListenerAdapter.

Author: Isira-Seneviratne

app/src/main/java/org/schabi/newpipe/ktx/View.kt

@@ -90,7 +90,9 @@ fun View.animate(
  */
 fun View.animateBackgroundColor(duration: Long, @ColorInt colorStart: Int, @ColorInt colorEnd: Int) {
     if (MainActivity.DEBUG) {
-        Log.d(TAG, "animateBackgroundColor() called with: view = [$this], duration = [$duration], " +
+        Log.d(
+            TAG,
+            "animateBackgroundColor() called with: view = [$this], duration = [$duration], " +
                 "colorStart = [$colorStart], colorEnd = [$colorEnd]"
         )
     }
@@ -147,20 +149,13 @@ private fun View.animateAlpha(enterOrExit: Boolean, duration: Long, delay: Long,
     if (enterOrExit) {
         animate().setInterpolator(FastOutSlowInInterpolator()).alpha(1f)
             .setDuration(duration).setStartDelay(delay)
-            .setListener(object : AnimatorListenerAdapter() {
-                override fun onAnimationEnd(animation: Animator) {
-                    execOnEnd?.run()
-                }
-            }).start()
+            .setListener(ExecOnEndListener(execOnEnd))
+            .start()
     } else {
         animate().setInterpolator(FastOutSlowInInterpolator()).alpha(0f)
             .setDuration(duration).setStartDelay(delay)
-            .setListener(object : AnimatorListenerAdapter() {
-                override fun onAnimationEnd(animation: Animator) {
-                    isGone = true
-                    execOnEnd?.run()
-                }
-            }).start()
+            .setListener(HideAndExecOnEndListener(this, execOnEnd))
+            .start()
     }
 }
 
@@ -172,24 +167,17 @@ private fun View.animateScaleAndAlpha(enterOrExit: Boolean, duration: Long, dela
             .setInterpolator(FastOutSlowInInterpolator())
             .alpha(1f).scaleX(1f).scaleY(1f)
             .setDuration(duration).setStartDelay(delay)
-            .setListener(object : AnimatorListenerAdapter() {
-                override fun onAnimationEnd(animation: Animator) {
-                    execOnEnd?.run()
-                }
-            }).start()
+            .setListener(ExecOnEndListener(execOnEnd))
+            .start()
     } else {
         scaleX = 1f
         scaleY = 1f
         animate()
             .setInterpolator(FastOutSlowInInterpolator())
             .alpha(0f).scaleX(.8f).scaleY(.8f)
             .setDuration(duration).setStartDelay(delay)
-            .setListener(object : AnimatorListenerAdapter() {
-                override fun onAnimationEnd(animation: Animator) {
-                    isGone = true
-                    execOnEnd?.run()
-                }
-            }).start()
+            .setListener(HideAndExecOnEndListener(this, execOnEnd))
+            .start()
     }
 }
 
@@ -202,11 +190,8 @@ private fun View.animateLightScaleAndAlpha(enterOrExit: Boolean, duration: Long,
             .setInterpolator(FastOutSlowInInterpolator())
             .alpha(1f).scaleX(1f).scaleY(1f)
             .setDuration(duration).setStartDelay(delay)
-            .setListener(object : AnimatorListenerAdapter() {
-                override fun onAnimationEnd(animation: Animator) {
-                    execOnEnd?.run()
-                }
-            }).start()
+            .setListener(ExecOnEndListener(execOnEnd))
+            .start()
     } else {
         alpha = 1f
         scaleX = 1f
@@ -215,12 +200,8 @@ private fun View.animateLightScaleAndAlpha(enterOrExit: Boolean, duration: Long,
             .setInterpolator(FastOutSlowInInterpolator())
             .alpha(0f).scaleX(.95f).scaleY(.95f)
             .setDuration(duration).setStartDelay(delay)
-            .setListener(object : AnimatorListenerAdapter() {
-                override fun onAnimationEnd(animation: Animator) {
-                    isGone = true
-                    execOnEnd?.run()
-                }
-            }).start()
+            .setListener(HideAndExecOnEndListener(this, execOnEnd))
+            .start()
     }
 }
 
@@ -231,22 +212,15 @@ private fun View.animateSlideAndAlpha(enterOrExit: Boolean, duration: Long, dela
         animate()
             .setInterpolator(FastOutSlowInInterpolator()).alpha(1f).translationY(0f)
             .setDuration(duration).setStartDelay(delay)
-            .setListener(object : AnimatorListenerAdapter() {
-                override fun onAnimationEnd(animation: Animator) {
-                    execOnEnd?.run()
-                }
-            }).start()
+            .setListener(ExecOnEndListener(execOnEnd))
+            .start()
     } else {
         animate()
             .setInterpolator(FastOutSlowInInterpolator())
             .alpha(0f).translationY(-height.toFloat())
             .setDuration(duration).setStartDelay(delay)
-            .setListener(object : AnimatorListenerAdapter() {
-                override fun onAnimationEnd(animation: Animator) {
-                    isGone = true
-                    execOnEnd?.run()
-                }
-            }).start()
+            .setListener(HideAndExecOnEndListener(this, execOnEnd))
+            .start()
     }
 }
 
@@ -257,21 +231,14 @@ private fun View.animateLightSlideAndAlpha(enterOrExit: Boolean, duration: Long,
         animate()
             .setInterpolator(FastOutSlowInInterpolator()).alpha(1f).translationY(0f)
             .setDuration(duration).setStartDelay(delay)
-            .setListener(object : AnimatorListenerAdapter() {
-                override fun onAnimationEnd(animation: Animator) {
-                    execOnEnd?.run()
-                }
-            }).start()
+            .setListener(ExecOnEndListener(execOnEnd))
+            .start()
     } else {
         animate().setInterpolator(FastOutSlowInInterpolator())
             .alpha(0f).translationY(-height / 2.0f)
             .setDuration(duration).setStartDelay(delay)
-            .setListener(object : AnimatorListenerAdapter() {
-                override fun onAnimationEnd(animation: Animator) {
-                    isGone = true
-                    execOnEnd?.run()
-                }
-            }).start()
+            .setListener(HideAndExecOnEndListener(this, execOnEnd))
+            .start()
     }
 }
 
@@ -293,11 +260,7 @@ fun View.slideUp(
         .setStartDelay(delay)
         .setDuration(duration)
         .setInterpolator(FastOutSlowInInterpolator())
-        .setListener(object : AnimatorListenerAdapter() {
-            override fun onAnimationEnd(animation: Animator) {
-                execOnEnd?.run()
-            }
-        })
+        .setListener(ExecOnEndListener(execOnEnd))
         .start()
 }
 
@@ -311,6 +274,20 @@ fun View.animateHideRecyclerViewAllowingScrolling() {
     animate().alpha(0.0f).setDuration(200).start()
 }
 
+private open class ExecOnEndListener(private val execOnEnd: Runnable?) : AnimatorListenerAdapter() {
+    override fun onAnimationEnd(animation: Animator) {
+        execOnEnd?.run()
+    }
+}
+
+private class HideAndExecOnEndListener(private val view: View, execOnEnd: Runnable?) :
+    ExecOnEndListener(execOnEnd) {
+    override fun onAnimationEnd(animation: Animator) {
+        view.isGone = true
+        super.onAnimationEnd(animation)
+    }
+}
+
 enum class AnimationType {
     ALPHA, SCALE_AND_ALPHA, LIGHT_SCALE_AND_ALPHA, SLIDE_AND_ALPHA, LIGHT_SLIDE_AND_ALPHA
 }