EventBus StickyEvent(粘性事件) 的应用场景! 不需要手动注销事件总线

最新推荐文章于 2024-11-17 17:11:53 发布

oLevin

最新推荐文章于 2024-11-17 17:11:53 发布

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分类专栏： Android

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本文详细介绍了EventBus在Android开发中的应用，包括如何发布和订阅事件，以及如何避免常见错误。特别强调了粘性事件的使用及注意事项。

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=========>>>Actvity A

//通知UserRegisterStautsActivity更新状态
    EventBus.getDefault().postSticky(new UserRegisterActivity.EventFromUserRegisterActivity_RegisterFailed("未知错误:" + _status));

=========>>>Actvity B

EventBus.getDefault().registerSticky(this);

public void onEventMainThread(UserRegisterActivity.EventFromUserRegisterActivity_RegisterFailed event) {

注意：网上说的那个receiveXXXX()好像不管用

我们并没有在onDestory中对订阅者进行注销，也就是没有调用EventBus的unregister()函数,这就是最新版的特性之一，也是目前唯一不需要手动注销的事件总线库。这里需要注意是，粘性Sticky事件需要你手动进行移除！EventBus.getDefault().removeStickyEvent(event);

注册EventBus时，当前类必须实现回到函数，否则运行报错：

4-09 23:38:45.745 6096-6096/com.smart.vbox E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.smart.vbox, PID: 6096
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.smart.vbox/com.smart.vbox.ui.activity.setting.UserRegisterStautsActivity}: de.greenrobot.event.EventBusException: Subscriber class com.smart.vbox.ui.activity.setting.UserRegisterStautsActivity has no public methods called onEvent
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2338)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2390)
at android.app.ActivityThread.access$800(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1321)
at android.os.Handler.dispatchMessage(Handler.java:110)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:5292)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:825)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:641)
at dalvik.system.NativeStart.main(Native Method)
Caused by: de.greenrobot.event.EventBusException: Subscriber class com.smart.vbox.ui.activity.setting.UserRegisterStautsActivity has no public methods called onEvent
at de.greenrobot.event.SubscriberMethodFinder.findSubscriberMethods(SubscriberMethodFinder.java:119)
at de.greenrobot.event.EventBus.register(EventBus.java:163)
at de.greenrobot.event.EventBus.registerSticky(EventBus.java:151)
at com.smart.vbox.ui.activity.setting.UserRegisterStautsActivity.onCreate(UserRegisterStautsActivity.java:57)
at android.app.Activity.performCreate(Activity.java:5318)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1088)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2302)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2390)
at android.app.ActivityThread.access$800(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1321)
at android.os.Handler.dispatchMessage(Handler.java:110)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:5292)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:825)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:641)
at dalvik.system.NativeStart.main(Native Method)