diff --git a/android/src/main/java/org/opentraa/pip/PipPlugin.java b/android/src/main/java/org/opentraa/pip/PipPlugin.java
index 026bb0f..222de2d 100644
--- a/android/src/main/java/org/opentraa/pip/PipPlugin.java
+++ b/android/src/main/java/org/opentraa/pip/PipPlugin.java
@@ -110,7 +110,9 @@ public void onMethodCall(@NonNull MethodCall call, @NonNull Result result) {
   @Override
   public void onDetachedFromEngine(@NonNull FlutterPluginBinding binding) {
     channel.setMethodCallHandler(null);
-    pipController.dispose();
+    if(pipController!=null){
+      pipController.dispose();
+    }
   }
 
   private void initPipController(@NonNull ActivityPluginBinding binding) {