【已解决】Unable to stop activity {com.xxx.xxx.Activity}: java.lang.IllegalArgumentException: Receiver no

Unable to stop activity {com.xxx.xxx.Activity}: java.lang.IllegalArgumentException: Receiver not registered: com.xx.xxx.fragment$1@8a6d2bc

public class BaseFragment extends Fragment {

	public IntentFilter filter = new IntentFilter();
    private BroadcastReceiver mDateReceiver = new BroadcastReceiver() {

        @Override
        public void onReceive(Context context, Intent intent) {
            onReceiveProcess(intent);

        }
    };

    /**
     * 处理广播事件
     */
    protected void onReceiveProcess(Intent intent) {
    }
    
    protected void registerSysReceiver() {
        filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
        getBaseActivity().registerReceiver(mDateReceiver, filter);
    }

    protected void unregisterSysReceiver() {
        getBaseActivity().unregisterReceiver(mDateReceiver);
    }


    @Override
    public void onStart() {
        super.onStart();
        if (!isHidden()) {
            registerSysReceiver();
        }
    }

	@Override
	public void onStop(){
		super.onStop();
        unregisterSysReceiver();
	}
}       

public class ActivityV extends FragmentActivity {

@Override
	protected void onCreate(Bundle savedInstanceState) {
		displayFragment(new BaseFragment(),R.id.container);
    }

    
    @Override
    public void displayFragment(BaseFragment targetFrg, int containerId) {
        if (targetFrg == null) {
            return;
        }
        FragmentTransaction transaction = mActivity.getSupportFragmentManager().beginTransaction();
        try {
            transaction.setTransition(FragmentTransaction.TRANSIT_NONE);
            if (targetFrg.isAdded()) {
                transaction.hide(mCurrentFrg);
                transaction.show(targetFrg);
            } else {
                if (mCurrentFrg != null) {
                    transaction.hide(mCurrentFrg);
                }
                if (mFragments.contains(targetFrg)) {
                    transaction.show(targetFrg);
                } else {
                    transaction.add(containerId, targetFrg, targetFrg.getClass().getName());
                    mFragments.add(targetFrg);
                }
            }
            mCurrentFrg = targetFrg;
            
            transaction.commitAllowingStateLoss();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    
}

基本流程代码是这样的,看起来可能是很正常的系统广播注册与反注册流程，但为什么偏偏会在OnStop的时候进行反注册，报了如下的错呢？

2023-11-17 15:18:45.454 13985-13985/kdv.mt.mtui.skywalker E/AndroidRuntime: FATAL EXCEPTION: main
    Process: kdv.mt.mtui.skywalker, PID: 13985
    java.lang.RuntimeException: Unable to stop activity {xx.xx.xx.xx/xx.xxx.xx.xx.xx.xx.xxxxActivityV}: java.lang.IllegalArgumentException: Receiver not registered: xx.xx.xx.xx.xx.xx.BaseFragment$1@5d7b1ae
        at android.app.ActivityThread.callActivityOnStop(ActivityThread.java:4151)
        at android.app.ActivityThread.performStopActivityInner(ActivityThread.java:4121)
        at android.app.ActivityThread.handleStopActivity(ActivityThread.java:4196)
        at android.app.servertransaction.StopActivityItem.execute(StopActivityItem.java:41)
        at android.app.servertransaction.TransactionExecutor.executeLifecycleState(TransactionExecutor.java:145)
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:70)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1808)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:193)
        at android.app.ActivityThread.main(ActivityThread.java:6669)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
     Caused by: java.lang.IllegalArgumentException: Receiver not registered: xxxx.xx.xx.xx.xx.xxx.BaseFragment$1@5d7b1ae
        at android.app.LoadedApk.forgetReceiverDispatcher(LoadedApk.java:1271)
        at android.app.ContextImpl.unregisterReceiver(ContextImpl.java:1504)
        at android.content.ContextWrapper.unregisterReceiver(ContextWrapper.java:659)
        at xxx.xxx.xxx.xxx.xx.xxx.xxxx.onStop(BaseFragment.java:134)
        at androidx.fragment.app.Fragment.performStop(Fragment.java:2797)
        at androidx.fragment.app.FragmentManagerImpl.moveToState(FragmentManagerImpl.java:940)
        at androidx.fragment.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManagerImpl.java:1238)
        at androidx.fragment.app.FragmentManagerImpl.moveToState(FragmentManagerImpl.java:1303)
        at androidx.fragment.app.FragmentManagerImpl.dispatchStateChange(FragmentManagerImpl.java:2659)
        at androidx.fragment.app.FragmentManagerImpl.dispatchStop(FragmentManagerImpl.java:2634)
        at androidx.fragment.app.FragmentController.dispatchStop(FragmentController.java:290)
        at androidx.fragment.app.FragmentActivity.onStop(FragmentActivity.java:564)
        at xxx.xx.xx.xx.xxx.xxx.BaseActivity.onStop(BaseActivity.java:648)
        at android.app.Instrumentation.callActivityOnStop(Instrumentation.java:1432)
        at android.app.Activity.performStop(Activity.java:7367)
        at android.app.ActivityThread.callActivityOnStop(ActivityThread.java:4143)
        at android.app.ActivityThread.performStopActivityInner(ActivityThread.java:4121) 
        at android.app.ActivityThread.handleStopActivity(ActivityThread.java:4196) 
        at android.app.servertransaction.StopActivityItem.execute(StopActivityItem.java:41) 
        at android.app.servertransaction.TransactionExecutor.executeLifecycleState(TransactionExecutor.java:145) 
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:70) 
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1808) 
        at android.os.Handler.dispatchMessage(Handler.java:106) 
        at android.os.Looper.loop(Looper.java:193) 
        at android.app.ActivityThread.main(ActivityThread.java:6669) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858) 

简答总结一下上面的操作：

在一个fragmentA里面onstart && !isHidden()的时候注册一个系统广播CONNECTIVITY_ACTION，然后再onstop的时候进行反注册；然后在fragmentA中open一个新的Activity，此时会在fragmentA的onstop的反注册时机上，导致apk崩溃；

我尝试怀疑过
1、注册广播使用的Context不对；改用成更高层的applicationContext问题依旧
2、反注册时机，延后到ondestory或者往前onpause，甚至在onhiddenchange回调里面去做反注册，问题都是一样的相似

最终大家了打印，在fragment的OnStart注册之前把Context和BroadcastReceiver两个对象打出来，反注册时也把这两个对象打出来。发现两点原因：

原因

1、Context前后不一致了；注册和反注册使用到的Context不是同一个；

2、BroadcastReceiver对象前后不一致；注册时用到的广播器对象和反注册用到的广播器对象不是同一个；

这是我犯的错；

潜在的原因其实还有可能是

3、你的系统广播没有注册成功

4、反注册的时机不对；