关于android：如何将AsyncTask 转换为RxAndroid

how to convert AsyncTask to RxAndroid

我是 rxandroid 新手，现在我想使用 rxandroid 访问互联网而不使用 AsyncTask，我在下面写了一些代码

```

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Observable<String> o= Observable.create(new Observable.OnSubscribe<String>() {

@Override
public void call(Subscriber<? super String> sub) {
sub.onNext("http://192.168.191.1/test3.html");//The test url in my computer ,it works ok;
}
});
Subscriber<String> mySubscriber = new Subscriber<String>() {
@Override
public void onNext(String s) {
InputStream in = null;
try {
in = new URL(s).openStream();
} catch (IOException e) {
e.printStackTrace();
}
Reader r = null;
try {
r = new InputStreamReader(in,"utf-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
char[] buffer = new char[8000];
try {
r.read(buffer);
} catch (IOException e) {
e.printStackTrace();
}
Log.d("AAA", new String(buffer));
}

@Override
public void onCompleted() { }

@Override
public void onError(Throwable e) { }
};
o.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(mySubscriber);

```

它没有导致任何崩溃，但我无法得到任何输出，有人知道如何解决吗？非常感谢。