### RxJava使用总结
1.
```
.subscribeOn(Schedulers.computation())
.observeOn(Schedulers.computation())
```
这样会发生线程切换
2.
- subscribeOn只能使用一次,只有第一次有用
- observeOn可是使用多次,最后一次生效
```
public static void main(String[] args) {
Disposable disposable = Observable.create(new ObservableOnSubscribe() {
@Override
public void subscribe(ObservableEmitter emitter) throws Exception {
Log.i(TAG, "subscribe1: " + Thread.currentThread().getId() + ":" + Thread.currentThread().getName());
emitter.o