diff --git a/app/src/main/java/com/ray650128/gstreamer_demo_app/ui/mainScreen/SplitViewFragment.kt b/app/src/main/java/com/ray650128/gstreamer_demo_app/ui/mainScreen/SplitViewFragment.kt
index 4793313..efed992 100644
--- a/app/src/main/java/com/ray650128/gstreamer_demo_app/ui/mainScreen/SplitViewFragment.kt
+++ b/app/src/main/java/com/ray650128/gstreamer_demo_app/ui/mainScreen/SplitViewFragment.kt
@@ -78,12 +78,7 @@ class SplitViewFragment : Fragment() {
 
     override fun onResume() {
         super.onResume()
-        //if (viewModel.activePage.value == mPageNum) {
-            MainScope().launch {
-                //delay(splitMode * Constants.CONF_DELAY_BASE_MILLIS)
-                playAll()
-            }
-        //}
+        playAll()
         Log.d("${TAG}_$mPageNum", "onResume()")
     }
 
@@ -167,7 +162,7 @@ class SplitViewFragment : Fragment() {
                             }
                             MainScope().launch {
                                 stopAll()
-                                //delay(splitMode * Constants.CONF_DELAY_BASE_MILLIS)
+                                delay(splitMode * Constants.CONF_DELAY_BASE_MILLIS)
                                 //delay((splitMode * 100) + Constants.CONF_DELAY_BASE_MILLIS)
                                 val item = data[position]
                                 val bundle = Bundle().apply {
@@ -195,16 +190,16 @@ class SplitViewFragment : Fragment() {
         }
     }
 
-    fun playAll() /*= MainScope().launch(Dispatchers.Main)*/ {
-        if (videoViews.isEmpty()) return
-        //delay(splitMode * Constants.CONF_DELAY_BASE_MILLIS)
+    fun playAll() = MainScope().launch(Dispatchers.Main) {
+        if (videoViews.isEmpty()) return@launch
+        delay(splitMode * Constants.CONF_DELAY_BASE_MILLIS)
         for (index in data.indices) {
             if (!videoViews[index].isReady) continue
             videoViews[index].resetRetryCount()
             videoViews[index].play()
             //delay(300)
         }
-    }//.start()
+    }.start()
 
     fun stopAll() /*= MainScope().launch(Dispatchers.Main)*/ {
         if (videoViews.isEmpty()) return