[image_picker] Fix activity leak

0xZOne · 0xZOne · commit 0b4c89066d67 · 2021-10-21T09:07:24.000+08:00
diff --git a/packages/image_picker/image_picker/android/src/main/java/io/flutter/plugins/imagepicker/ImagePickerPlugin.java b/packages/image_picker/image_picker/android/src/main/java/io/flutter/plugins/imagepicker/ImagePickerPlugin.java
@@ -214,6 +214,8 @@ private void tearDown() {
     channel = null;
     application.unregisterActivityLifecycleCallbacks(observer);
     application = null;
+    activity = null;
+    observer = null;
   }
 
   @VisibleForTesting

Original file line number	Diff line number	Diff line change
`@@ -214,6 +214,8 @@ private void tearDown() {`
`214`	`214`	`channel = null;`
`215`	`215`	`application.unregisterActivityLifecycleCallbacks(observer);`
`216`	`216`	`application = null;`
	`217`	`+ activity = null;`
	`218`	`+ observer = null;`
`217`	`219`	`}`
`218`	`220`
`219`	`221`	`@VisibleForTesting`