RxBus----Rxjava实现EventBus

最新推荐文章于 2021-02-28 17:06:34 发布

原创最新推荐文章于 2021-02-28 17:06:34 发布 · 372 阅读

0 ·

CC 4.0 BY-SA版权

Android 专栏收录该内容

5 篇文章

订阅专栏

本文介绍了一种基于RxJava实现的RxBus组件，该组件可以替代传统的EventBus，用于实现不同组件间的解耦通信。文章通过示例代码详细展示了RxBus的创建过程及其在实际项目中的具体应用。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

基于RxJava实现的RxBus可替换原有的EventBus

这位作者写的还是比较容易理解的

package com.xc.todaynews.rxjava;

import rx.Observable;
import rx.subjects.PublishSubject;
import rx.subjects.SerializedSubject;
import rx.subjects.Subject;


public class RxBus {
    private static RxBus mRxBus = null;
    /**
     * PublishSubject只会把在订阅发生的时间点之后来自原始Observable的数据发射给观察者
     */

    private Subject<Object, Object> mRxBusObserverable = new SerializedSubject<>(PublishSubject.create());

    public static synchronized RxBus getInstance() {
        if (mRxBus == null) {
            mRxBus = new RxBus();
        }
        return mRxBus;
    }

    public void post(Object o) {
        if (hasObservers())
            mRxBusObserverable.onNext(o);
    }

    public Observable<Object> toObserverable() {
        return mRxBusObserverable;
    }

    /**
     * 判断是否有订阅者
     */
    public boolean hasObservers() {
        return mRxBusObserverable.hasObservers();
    }
}

实际使用

public class RxBusActivity extends AppCompatActivity {
    private CompositeSubscription mCompositeSubscription;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_rx_bus);
        rxBusObservers();
        rxBusPost();
    }
    private void rxBusPost() {
        findViewById(R.id.button).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                RxBus.getInstance().post(HandleEvent.getInstance());
            }
        });
    }
    public void addSubscription(Subscription subscription) {
        if (this.mCompositeSubscription == null) {
            this.mCompositeSubscription = new CompositeSubscription();
        }
        this.mCompositeSubscription.add(subscription);
    }
    private void rxBusObservers() {
        Subscription subscription = RxBus.getInstance()
                .toObserverable()
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Subscriber<Object>() {
                    @Override
                    public void onCompleted() {
                    }
                    @Override
                    public void onError(Throwable e) {
                    }
                    @Override
                    public void onNext(Object event) {
                        if (event instanceof HandleEvent) {
                            //do something

                        }
                    }
                });
        addSubscription(subscription);
    }
    @Override
    protected void onDestroy() {
        super.onDestroy();
        Log.d("xc", "onDestroy");
        if (this.mCompositeSubscription != null) {
            //取消注册，以避免内存泄露
            this.mCompositeSubscription.unsubscribe();
        }
    }
}