IllegalArgumentException: Receiver not registered

一脸懵逼，敲的正爽的时候突然“很抱歉，xxx已停止运行”，感觉自己就只做了个json解析，之前注册的广播从未发生此类错误，直到一个小时前，what is？ Who can help me？？？

E/AndroidRuntime: FATAL EXCEPTION: main
Process: org.newmedia, PID: 18356
java.lang.RuntimeException: Unable to destroy activity {org.xxx/org.xxx.activites.MainActivity}: java.lang.IllegalArgumentException: Receiver not registered: org.xxx.base.ExitAppReceiver@222fa703
at android.app.ActivityThread.performDestroyActivity(ActivityThread.java:3706)
at android.app.ActivityThread.handleDestroyActivity(ActivityThread.java:3724)
at android.app.ActivityThread.access$1400(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1357)
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)
Caused by: java.lang.IllegalArgumentException: Receiver not registered: org.newmedia.base.ExitAppReceiver@222fa703
at android.app.LoadedApk.forgetReceiverDispatcher(LoadedApk.java:765)
at android.app.ContextImpl.unregisterReceiver(ContextImpl.java:1666)
at android.content.ContextWrapper.unregisterReceiver(ContextWrapper.java:511)
at org.xxx.base.BaseActivity.unRegisterExitReceiver(BaseActivity.java:435)
at org.xxx.base.BaseActivity.onDestroy(BaseActivity.java:1051)
at org.xxx.activites.MainActivity.onDestroy(MainActivity.java:2239)
at android.app.Activity.performDestroy(Activity.java:6169)
at android.app.Instrumentation.callActivityOnDestroy(Instrumentation.java:1141)
at android.app.ActivityThread.performDestroyActivity(ActivityThread.java:3693)
at android.app.ActivityThread.handleDestroyActivity(ActivityThread.java:3724)
at android.app.ActivityThread.access$1400(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1357)
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)

“该广播接受器已被注销,导致找不到该广播接收器”，这好办，给它加上一个tag标识嘛，如果此广播为注册状态则可解除广播，否则不予理会；but 为什么好好的项目，并没有任何改动广播类的情况下会发生此错误？what is？

private boolean mReceiverTag = false;   //广播接受者标识
//代码中动态注册广播
private void registerExitReceiver() {
if (!mReceiverTag){     //在注册广播接受者的时候 判断是否已被注册,避免重复多次注册广播
mReceiverTag = true;    //标识值 赋值为 true 表示广播已被注册
IntentFilter exitFilter = new IntentFilter();
exitFilter.addAction(EXIT_APP_ACTION);
registerReceiver(exitReceiver, exitFilter);
}
}

private void unRegisterExitReceiver() {
if (mReceiverTag) {   //判断广播是否注册
mReceiverTag = false;   //Tag值 赋值为false 表示该广播已被注销
unregisterReceiver(exitReceiver);   //注销广播
}

}

但是，又有一个坑，不知道为何广播的问题一个接一个

Are you missing a call to unregisterReceiver()?

mygod！我真的“unregisterReceiver();”了，但是……