优化启动时会闪一下的问题

.gitignore

@@ -1,7 +1,7 @@
 *.iml
 .gradle
 /local.properties
-/.idea
+/.idea/
 /.idea/caches
 /.idea/libraries
 /.idea/modules.xml

POPDialog/src/main/java/com/yutou/popdialog/POPDialog.kt

@@ -1,5 +1,6 @@
 package com.yutou.popdialog
 
+import android.animation.Animator
 import android.animation.ObjectAnimator
 import android.annotation.SuppressLint
 import android.app.Activity
@@ -64,6 +65,7 @@ class POPDialog : Dialog {
         )
         windowParams.gravity = Gravity.BOTTOM
         view.layoutParams = windowParams
+        view.y=+POPDialogUtils.getDisplay(activityContext).mode.physicalHeight.toFloat()
         mainView.addView(view)
         super.setContentView(mainView)
     }
@@ -174,16 +176,35 @@ class POPDialog : Dialog {
      * @param expansion true 展开 false 拉下
      */
     private fun expansion(expansion: Boolean) {
+        if (showModel == 0 && !expansion) {
+            finish()
+            return
+        }
         val viewAnim = if (expansion) {
             ObjectAnimator.ofFloat(view, "translationY", 0f).setDuration(300L)
         } else {
             ObjectAnimator.ofFloat(view, "translationY", expansionY).setDuration(300L)
         }
+
+        viewAnim.addListener(object : Animator.AnimatorListener {
+            override fun onAnimationStart(p0: Animator?) {
+            }
+
+            override fun onAnimationEnd(p0: Animator?) {
                 showModel = if (expansion) {
                     1
                 } else {
                     0
                 }
+            }
+
+            override fun onAnimationCancel(p0: Animator?) {
+            }
+
+            override fun onAnimationRepeat(p0: Animator?) {
+            }
+
+        })
         viewAnim.start()
     }
 
@@ -267,6 +288,10 @@ class POPDialog : Dialog {
         view.startAnimation(animation)
     }
 
+    override fun onTouchEvent(event: MotionEvent): Boolean {
+        return touch.onTouchEvent(event)
+    }
+
     /**
      * 触摸事件
      */