RxJava

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一、创建Observable，Observer ，建立连接observable.subscribe(observer);

1、添加依赖

compile 'io.reactivex.rxjava2:rxjava:2.0.1'compile 'io.reactivex.rxjava2:rxandroid:2.0.1'

private String TAG="MainActivity";

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

Observable<Integer> observable=Observable.create(new ObservableOnSubscribe<Integer>() {
@Override
public void subscribe(ObservableEmitter<Integer> e) throws Exception {
e.onNext(1);
e.onNext(2);
e.onNext(3);
e.onComplete();
}
});

Observer observer=new Observer() {
@Override
public void onSubscribe(Disposable d) {

Log.e(TAG,"onSubscribe");
}

@Override
public void onNext(Object value) {

Log.e(TAG,"value:--"+value);

}

@Override
public void onError(Throwable e) {

}

@Override
public void onComplete() {

Log.e(TAG,"onComplete");
}
};

observable.subscribe(observer);

}

二、执行顺序

08-06 10:17:54.468 14600-14600/chzy.org.rxjava E/MainActivity: onSubscribe

08-06 10:17:54.469 14600-14600/chzy.org.rxjava E/MainActivity: value:--1

08-06 10:17:54.469 14600-14600/chzy.org.rxjava E/MainActivity: value:--2

08-06 10:17:54.469 14600-14600/chzy.org.rxjava E/MainActivity: value:--3

08-06 10:17:54.469 14600-14600/chzy.org.rxjava E/MainActivity: onComplete

三、链式

Observable.create(new ObservableOnSubscribe<Integer>() {    @Override    public void subscribe(ObservableEmitter<Integer> e) throws Exception {        e.onNext(1);        e.onNext(2);        e.onNext(3);        e.onComplete();    }}) .subscribe(new Observer<Integer>() {    @Override    public void onSubscribe(Disposable d) {        Log.e(TAG,"onSubscribe");    }    @Override    public void onNext(Integer value) {        Log.e(TAG,"value:--"+value);    }    @Override    public void onError(Throwable e) {        Log.e(TAG,"onError");    }    @Override    public void onComplete() {        Log.e(TAG,"onComplete");    }});

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