RxBus的简单使用 | 易学教程

1、添加库的依赖，顺便把ButterKinfe添加一下，偷个懒哈哈

    implementation 'com.jakewharton:butterknife:8.7.0'     annotationProcessor 'com.jakewharton:butterknife-compiler:8.7.0'     implementation 'io.reactivex:rxandroid:1.2.1'     implementation 'io.reactivex:rxjava:1.2.1'

2、新建RxBus类，不多说，这个自己从网上找一下

public class RxBus {     private static volatile RxBus defaultInstance;      private final Subject<Object, Object> bus;          public RxBus() {         bus = new SerializedSubject<>(PublishSubject.create());     }     // 单例RxBus     public static RxBus getDefault() {         if (defaultInstance == null) {             synchronized (RxBus.class) {                 if (defaultInstance == null) {                     defaultInstance = new RxBus();                 }             }         }         return defaultInstance ;     }     // 发送一个新的事件     public void post (Object o) {         bus.onNext(o);     }     // 接受消息     public <T> Observable<T> toObservable (Class<T> eventType) {         return bus.ofType(eventType);      } }

3、创建需要发送的事件类，我们要传一个city名字过去

public class CityEvent {     private String id;     private String cityName;      public CityEvent(String id, String cityName) {         this.id = id;         this.cityName = cityName;     }      public String getId() {         return id;     }      public void setId(String id) {         this.id = id;     }      public String getCityName() {         return cityName;     }      public void setCityName(String cityName) {         this.cityName = cityName;     } }

4、发送事件，我们就设定在第二个activity的点击事件中了

 RxBus.getDefault().post(new CityEvent("001","北京市"));

5、在MainActivity中接受事件

 mSubscription = RxBus.getDefault().toObservable(CityEvent.class)                 .subscribe(new Action1<CityEvent>() {                     @Override                     public void call(CityEvent cityEvent) {                         text1.setText("添加城市成功，收到了ActivityTwo传来的城市名称"+ cityEvent.getCityName());                     }                 },                 new Action1<Throwable>() {                     @Override                     public void call(Throwable throwable) {                     }                 });

6、最后不要忘了取消订阅哦，防止内存泄漏

 @Override     protected void onDestroy() {         if (!mSubscription.isUnsubscribed()){             mSubscription.unsubscribe();         }         super.onDestroy();     }

看看结果

总结

RxBus的简单用法，方便同学们查询

小Demo地址https://github.com/pengboboer/RxBusTest

文章来源: RxBus的简单使用

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