内存泄漏问题优化

services/mogo-service/src/main/java/com/mogo/service/impl/fragmentmanager/FragmentStack.java

@@ -48,7 +48,7 @@ public class FragmentStack {
         return sInstance;
     }
 
-    public synchronized void release() {
+    public static synchronized void release() {
         sInstance = null;
     }
 
@@ -199,4 +199,8 @@ public class FragmentStack {
         }
         invokeCallback();
     }
+
+    public void destroy(){
+        mFragmentManager = null;
+    }
 }

services/mogo-service/src/main/java/com/mogo/service/impl/fragmentmanager/MogoFragmentManager.java

@@ -74,6 +74,11 @@ public class MogoFragmentManager implements IMogoFragmentManager {
         return FragmentStack.getInstance().getMessageHistoryContainerId();
     }
 
+    @Override
+    public void destroy() {
+        FragmentStack.getInstance().destroy();
+    }
+
     @Override
     public void init( Context context ) {