RxJava的使用,教你四步搞定RxBus.-优快云博客

本文链接：https://blog.youkuaiyun.com/qq_33275672/article/details/52305580

本文详细介绍如何在Android应用中引入并使用RxBus进行事件通信。从添加依赖开始，到创建工具类，再到订阅与发送消息的具体实现，一步步引导读者轻松上手RxBus。

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教你四步搞定RxBus.

1,在你的工程中添加依赖

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:23.3.0'
   <span style="color:#ff0000;"> <em>compile 'io.reactivex:rxjava:1.1.9'</em></span>
}

在你的项目中添加Rxbus.java工具类,方便使用RxJava

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

 
public class RxBus {

    private RxBus() {}

    private static class SingleHolder {
        public static RxBus mRxBus = new RxBus();
    }

    public static RxBus getInstance() {
        return SingleHolder.mRxBus;
    }

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

    public void send(Object o) {
        _bus.onNext(o);
    }

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

3,接下来就可以使用了

在需要的地方首先订阅.最后别忘了解除订阅.

package com.example.jiang_yan.rxbus;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.TextView;

import rx.Subscription;
import rx.functions.Action1;

/**
 * Created by jiang_yan on 2016/8/25.
 */
public class B extends Activity{

    private Subscription mSubscribe;
    private TextView tv;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.b);
        tv = (TextView) findViewById(R.id.tv_b);
       //订阅
        subscribeRxBus();
    }


/**

订阅

****/

    private void subscribeRxBus() {
        mSubscribe = RxBus.getInstance().toObserverable().subscribe(new Action1<Object>() {
            @Override
            public void call(Object o) {

//在这里就是收到的发送来的数据
                Log.e("RxBus", "call: " + o);
                if (o instanceof CharSequence) {
                    tv.setText(o.toString());
                }
            }
        });
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        if (mSubscribe != null && !mSubscribe.isUnsubscribed()) {
            mSubscribe.unsubscribe();
        }
    }
}

4,发送数据(就更简单了)

其实就是一行代码

RxBus.getInstance().send("要发送的东西");

import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.TextView;

import rx.Subscription;

public class MainActivity extends AppCompatActivity {

    private Subscription mSubscribe;
    Handler mHandler = new Handler();
    private TextView tv;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        tv = (TextView) findViewById(R.id.tv);
        //跳转到B
        tv.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                startActivity(new Intent(MainActivity.this,B.class));
            }
        });
        mHandler.postDelayed(new Runnable() {
            @Override
            public void run() {
              mHandler.postDelayed(this,1000);
                RxBus.getInstance().send(System.currentTimeMillis()+"");
            }
        },1000);
    }



}

完了,就这么简单.你会了吗?