android - 尝试在空对象上调用虚拟方法 ‘android.os.Handler android.support.v4.app.FragmentHostCallback.getHandler()’

Question

Attempt to invoke virtual method 'android.os.Handler android.support.v4.app.FragmentHostCallback.getHandler()' on a null object reference
  at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1588)
  at android.support.v4.app.FragmentController.execPendingActions(FragmentController.java:330)
  at android.support.v4.app.FragmentActivity.onResume(FragmentActivity.java:441)
  at com.app.rare10.activities.ViewAllMemberActivity.onResume(ViewAllMemberActivity.java:192)
  at com.app.rare10.activities.ViewAllMemberActivity$1.onReceive(ViewAllMemberActivity.java:74)
  at android.support.v4.content.LocalBroadcastManager.executePendingBroadcasts(LocalBroadcastManager.java:297)
  at android.support.v4.content.LocalBroadcastManager.access$000(LocalBroadcastManager.java:46)
  at android.support.v4.content.LocalBroadcastManager$1.handleMessage(LocalBroadcastManager.java:116)
  at android.os.Handler.dispatchMessage(Handler.java:102)
  at android.os.Looper.loop(Looper.java:135)
  at android.app.ActivityThread.main(ActivityThread.java:5254)
  at java.lang.reflect.Method.invoke(Native Method)
  at java.lang.reflect.Method.invoke(Method.java:372)
  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698

我在我的项目中使用了推送通知，每当我点击我的通知时，我都会收到上面的错误。帮忙？

Answer 1

我使用了一个 bool 值来防止 Activity 被破坏并恢复。

boolean hasStop;
.
.
.
.
//here is when I need to prevent
if(!hasStop)
   //Statement
.
.
.
@Override
protected void onDestroy() {
    super.onDestroy();
    hasStop=true;
}

@Override
protected void onResume() { 
    super.onResume();
    hasStop=false;
}