Android RxBus 学习-优快云博客

本文链接：https://blog.youkuaiyun.com/shiluohuashengmi/article/details/80703628

本文详细介绍了如何使用RxBus实现Android应用中不同组件之间的数据传递，包括定义RxBus类、创建数据Bean、在MainActivity及另一个Activity中进行数据发送与接收的过程。

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今天记录下 RxBus 内容
RxBus 可实现组件间数据的传递（如两个Activity 之间传递数据）；

1.定义 RxBus

public class RxBus {

    private static volatile RxBus instance;
    private final Subject<Object, Object> BUS;

    private RxBus() {
        BUS = new SerializedSubject<>(PublishSubject.create());
    }

    public static RxBus getDefault() {
        if (instance == null) {
            synchronized (RxBus.class) {
                if (instance == null) {
                    instance = new RxBus();
                }
            }
        }
        return instance;
    }

    public void post(Object event) {
        BUS.onNext(event);
    }

    public <T> Observable<T> toObserverable(Class<T> eventType) {
        return BUS.ofType(eventType);
    }
}

2.定义数据 bean
定义的数据，其中就包括了两个变量

public class userEvent {

    private String name = null;
    private String ID = null;

    public userEvent(String name, String ID) {
        this.name = name;
        this.ID = ID;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getID() {
        return ID;
    }

    public void setID(String ID) {
        this.ID = ID;
    }
}

3.MainActvity

public class MainActivity extends AppCompatActivity {

    private CompositeSubscription allSubscription = new CompositeSubscription();
    private Button button = null;

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

         //接收数据
         allSubscription.add(RxBus.getDefault()
                .toObserverable(userEvent.class).subscribe(new Action1<userEvent>() {
                     @Override
                     public void call(userEvent uEvent) {
                          Log.e("MainActivity","response\n" + event.getName());
                     }
                 }));

         button = (Button)findViewById(R.id.send);

         button.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
                 Intent intent = new Intent(MainActivity.this,ScondActivity.class);
                 startActivity(intent);
             }
         });
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        //取消订阅
        if (allSubscription != null && !allSubscription.isUnsubscribed())
            allSubscription.unsubscribe();
    }
}

注意接收数据的类型是我们定义的 bean – userEvent

4.第二个 Activity

public class ScondActivity extends AppCompatActivity {

    private Button button = null;
    private userEvent userEvent = null;

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

        button = (Button)findViewById(R.id.secBtn);

        userEvent = new userEvent("zhang","1111");
       //在这个 Activity 中发送数据，在 MainActivity中可接收到数据
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                RxBus.getDefault().post(userEvent);
            }
        });
    }
}

5.添加依赖项

    compile 'io.reactivex:rxandroid:1.2.1'
    compile 'io.reactivex:rxjava:1.1.6'

以上为学习和理解内容