踩坑错误记录

在做安卓项目的时候，要使用实现在Fragment之间传数据，故使用EventBus，但遇到一个错误：

org.greenrobot.eventbus.EventBusException: Subscriber class com.cyt.translate.fragment.MemoFragment and its super classes have no public methods with the @Subscribe annotationat org.greenrobot.eventbus.SubscriberMethodFinder.findSubscriberMethods(SubscriberMethodFinder.java:67)at org.greenrobot.eventbus.EventBus.register(EventBus.java:143)at com.cyt.translate.fragment.MemoFragment.onCreateView(MemoFragment.kt:53)at androidx.fragment.app.Fragment.performCreateView(Fragment.java:2698)at androidx.fragment.app.FragmentStateManager.createView(FragmentStateManager.java:320)at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1187)at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1356)at androidx.fragment.app.FragmentManager.moveFragmentToExpectedState(FragmentManager.java:1434)at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1497)at androidx.fragment.app.FragmentManager.dispatchStateChange(FragmentManager.java:2625)at androidx.fragment.app.FragmentManager.dispatchActivityCreated(FragmentManager.java:2577)at androidx.fragment.app.Fragment.performActivityCreated(Fragment.java:2722)at androidx.fragment.app.FragmentStateManager.activityCreated(FragmentStateManager.java:346)at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1188)at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1356)at androidx.fragment.app.FragmentManager.moveFragmentToExpectedState(FragmentManager.java:1434)at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1497)at androidx.fragment.app.FragmentManager.dispatchStateChange(FragmentManager.java:2625)at androidx.fragment.app.FragmentManager.dispatchActivityCreated(FragmentManager.java:2577)at androidx.fragment.app.FragmentController.dispatchActivityCreated(FragmentController.java:247)at androidx.fragment.app.FragmentActivity.onStart(FragmentActivity.java:541)at androidx.appcompat.app.AppCompatActivity.onStart(AppCompatActivity.java:210)at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1435)at android.app.Activity.performStart(Activity.java:8024)at android.app.ActivityThread.handleStartActivity(ActivityThread.java:3475)at android.app.servertransaction.TransactionExecutor.performLifecycleSequence(TransactionExecutor.java:221)at android.app.servertransaction.TransactionExecutor.cycleToPath(TransactionExecutor.java:201)at android.app.servertransaction.TransactionExecutor.executeLifecycleState(TransactionExecutor.java:173)at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:97)at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2066)at android.os.Handler.dispatchMessage(Handler.java:106)at android.os.Looper.loop(Looper.java:223)at android.app.ActivityThread.main(ActivityThread.java:7656)at java.lang.reflect.Method.invoke(Native Method)at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)

其实问题再第一行错误提示已经很明显了…

Subscriber class com.cyt.translate.fragment.MemoFragment and its super classes have no public methods with the @Subscribe annotation

问题在于：
只有在有使用 @Subscribe 注解方法的类中才需要去注册 EventBus
在这里，我的代码中发送者Fragment1 并没有用到@Subscribe注解，故不能去注册：

EventBus.getDefault().register(this);

只是在接受者里有函数：

@Subscribe(threadMode = ThreadMode.MAIN)
fun onEvent(bundle: Bundle){// dosomething
}

故解决方法：不要在没有出现@Subscribe注解类里注册EventBus

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这个错误是自己在使用EventBus的时候 register 多写了一次引起的. EventBus.getDefault().register(this);

EventBus: Subscriber class XXX and its super classes have no public method with the @Subscribe

踩坑错误记录

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