Update

Author: Zenlua

app/src/main/java/com/tool/tree/ActionPage.kt

@@ -32,6 +32,8 @@ import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.isActive
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
+import kotlinx.coroutines.async
+import kotlinx.coroutines.awaitAll
 
 class ActionPage : AppCompatActivity() {
     private val progressBarDialog by lazy { ProgressBarDialog(this) }