RxBus简单使用

RxBus并不是一个库，而是一种模式。相信大多数开发者都使用过EventBus，作为事件总线通信库，如果你的项目已经加入RxJava和EventBus，不妨用RxBus代替EventBus，以减少库的依赖。
一、添加RxJava和RxAndroid依赖

 compile 'io.reactivex:rxjava:1.1.0'    compile 'io.reactivex:rxandroid:1.1.0'

二、 新建RxBus类

public class RxBus {    private static volatile RxBus mInstance;    private final Subject bus;    public RxBus()    {        bus = new SerializedSubject<>(PublishSubject.create());    }    /**     * 单例模式RxBus     *     * @return     */    public static RxBus getInstance()    {        RxBus rxBus2 = mInstance;        if (mInstance == null)        {            synchronized (RxBus.class)            {                rxBus2 = mInstance;                if (mInstance == null)                {                    rxBus2 = new RxBus();                    mInstance = rxBus2;                }            }        }        return rxBus2;    }    /**     * 发送消息     *     * @param object     */    public void post(Object object)    {        bus.onNext(object);    }    /**     * 接收消息     *     * @param eventType     * @param <T>     * @return     */    public <T> Observable<T> toObserverable(Class<T> eventType)    {        return bus.ofType(eventType);    }}

三、创建你需要发送的事件类

public class StudentEvent {    private String id;    private String name;    public StudentEvent(String id, String name) {        this.id = id;        this.name = name;    }    public String getId() {        return id;    }    public void setId(String id) {        this.id = id;    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }}

四、发送事件

RxBus.getInstance().post(new StudentEvent("007","小明"));

五、接收事件

rxSbscription=RxBus.getInstance().toObserverable(StudentEvent.class)                .subscribe(new Action1<StudentEvent>() {                    @Override                    public void call(StudentEvent studentEvent) {                        textView.setText("id:"+ studentEvent.getId()+"  name:"+ studentEvent.getName());                    }                });

六、取消订阅

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

七、MainActivity整体代码

public class MainActivity extends AppCompatActivity {    TextView textView;    Subscription rxSbscription;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        textView = (TextView) findViewById(R.id.button);        //接收事件        rxBusObservers();        //监听跳转        rxBusPost();    }    //监听跳转    private void rxBusPost() {        textView.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                //发送事件                RxBus.getInstance().post(new StudentEvent("007", "小明"));            }        });    }    //接收事件    private void rxBusObservers() {        //rxSbscription是Sbscription的对象，        // 我们这里把RxBus.getInstance().toObserverable(StudentEvent.class)赋值给rxSbscription以方便生命周期结束时取消订阅事件        rxSbscription = RxBus.getInstance().toObserverable(StudentEvent.class)                .subscribe(new Action1<StudentEvent>() {                    @Override                    public void call(StudentEvent studentEvent) {                        textView.setText("id:" + studentEvent.getId() + "  name:" + studentEvent.getName());                    }                });    }    @Override    protected void onDestroy() {        if (!rxSbscription.isUnsubscribed()) {            rxSbscription.unsubscribe();        }        super.onDestroy();    }}