[英]how to change Schedulers in RxAndroid?
I want to use RxAndroid in my project, and i make the thread sleep for 50ms but it caused anr,the code 我想在我的项目中使用RxAndroid,我使线程休眠50毫秒,但它导致了错误,代码
public void getTypeAndCommodity() {
Observable.from(getCommodities())
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new Subscriber<Commodity>() {
@Override
public void onCompleted() {
}
@Override
public void onError(Throwable e) {
}
@Override
public void onNext(Commodity commodity) {
}
});
}
and the getCommodities: 和getCommodities:
private ArrayList<Commodity> getCommodities() {
// some test info
ArrayList<Commodity> list = new ArrayList<>();
for (int i = 0; i < 99; i++) {
Commodity commodity = new Commodity();
try {
Thread.sleep(50);
} catch (InterruptedException e) {
e.printStackTrace();
}
commodity.setName("name" + i);
commodity.setType("type" + (i + 1) / 10);
list.add(commodity);
}
return list;
}
why it cause anr?please help 为什么会引起过敏?请帮助
This happens because getCommodities() is executed in main thread, and only the item emited is executed in io thread with subscribeOn(Schedulers.io()). 发生这种情况是因为getCommodities()在主线程中执行,并且只有发出的项目才在io线程中使用subscriptionOn(Schedulers.io())执行。 If you want to execute getCommidities() in background thread too, you need to create an observable with defer() method:
如果您也想在后台线程中执行getCommidities(),则需要使用defer()方法创建一个可观察对象:
Observable.defer(new Func0<Observable<Object>>() {
@Override public Observable<Object> call() {
return Observable.from(getCommodities());
}
}).subscribeOn(Schedulers.io())...
If you need more info: http://blog.danlew.net/2015/07/23/deferring-observable-code-until-subscription-in-rxjava/ 如果您需要更多信息,请访问: http : //blog.danlew.net/2015/07/23/deferring-observable-code-until-subscription-in-rxjava/
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