package qianxingzhe.rxjava_learning;
import org.junit.Test;
import java.util.ArrayList;
import java.util.List;
import rx.Observable;
import rx.Observer;
import rx.Scheduler;
import rx.Subscriber;
import rx.Subscription;
import rx.android.schedulers.AndroidSchedulers;
import rx.functions.Action1;
import rx.functions.Func1;
import rx.schedulers.Schedulers;
/**
* Created by lunyi.yly on 16/8/6.
*/
public class RxJavaText {
@Test
public void hello_world_01() {
Observable<String> observable = Observable.create(new Observable.OnSubscribe<String>() {
@Override
public void call(Subscriber<? super String> subscriber) {
subscriber.onNext("Hello, World!");
subscriber.onCompleted();
}
});
Subscriber<String> subscriber = new Subscriber<String>() {
@Override
public void onCompleted() {
System.out.println("onCompleted()");
}
@Override
public void onError(Throwable e) {
System.out.println("onError()");
}
@Override
public void onNext(String s) {
System.out.println("onNext()");
System.out.println(s);
}
};
observable.subscribe(subscriber);
}
@Test
public void hello_world_02() {
Observable<String> observable = Observable.create(new Observable.OnSubscribe<String>() {
@Override
public void call(Subscriber<? super String> subscriber) {
subscriber.onNext("Hello, World!");
subscriber.onCompleted();
}
});
Observer<String> observer = new Observer<String>() {
@Override
public void onCompleted() {
System.out.println("onCompleted()");
}
@Override
public void onError(Throwable e) {
System.out.println("onError()");
}
@Override
public void onNext(String s) {
System.out.println("onNext()");
System.out.println("s");
}
};
observable.subscribe(observer);
}
@Test
public void just_01() {
Observable<String> observable = Observable.just("hello world");
Action1<String> action1 = new Action1<String>() {
@Override
public void call(String s) {
System.out.println(s);
}
};
observable.subscribe(action1);
}
/**
* just 用来创建只发出一个事件就结束的Observable对象
*/
@Test
public void just_02() {
Observable.just("hello world").subscribe(new Action1<String>() {
@Override
public void call(String s) {
System.out.println(s);
}
});
}
/**
* map 把一个事件转换为另一个事件
*/
@Test
public void map() {
Observable.just("hello world")
.map(new Func1<String, Integer>() {
@Override
public Integer call(String s) {
return s.hashCode();
}
})
.subscribe(new Action1<Integer>() {
@Override
public void call(Integer integer) {
System.out.println(integer);
}
});
}
/**
* from 接收一个集合作为输入,然后每次输出一个元素给subscriber
*/
@Test
public void from() {
Observable.from(new String[]{"hello", "world"})
.subscribe(new Action1<String>() {
@Override
public void call(String s) {
System.out.println(s);
}
});
}
/**
* flatMap 接收一个Observable的输出作为输入，同时输出另外一个Observable
*/
@Test
public void flatmap() {
List<List<String>> lists = new ArrayList<>();
Observable.from(lists)
.flatMap(new Func1<List<String>, Observable<String>>() {
@Override
public Observable<String> call(List<String> strings) {
return Observable.from(strings);
}
})
.subscribe(new Action1<String>() {
@Override
public void call(String s) {
System.out.println(s);
}
});
}
/**
* filter 输出和输入相同的元素，并且会过滤掉那些不满足检查条件的
*/
@Test
public void filter() {
Observable.from(new String[]{"hello", "world"})
.flatMap(new Func1<String, Observable<String>>() {
@Override
public Observable<String> call(String s) {
return Observable.just(s);
}
})
.filter(new Func1<String, Boolean>() {
@Override
public Boolean call(String s) {
return s.equals("hello");
}
})
.subscribe(new Action1<String>() {
@Override
public void call(String s) {
System.out.println(s);
}
});
}
/**
* take 输出最多指定数量的结果
*/
@Test
public void take() {
Observable.from(new Integer[]{1, 2, 3, 4, 5,})
.take(3)
.subscribe(new Action1<Integer>() {
@Override
public void call(Integer integer) {
System.out.println(integer);
}
});
}
/**
* doOnNext 允许我们在每次输出一个元素之前做一些额外的事情，比如这里的保存标题。
*/
@Test
public void doOnNext() {
Observable.just("hello world")
.doOnNext(new Action1<String>() {
@Override
public void call(String s) {
System.out.println(s);
}
})
.subscribe(new Action1<String>() {
@Override
public void call(String s) {
System.out.println(s);
}
});
}
/**
* subscribeOn 指定被观察者代码运行的线程
* ObserverOn 指定观察者运行的线程
*/
@Test
public void subscribeOn_ObserverOn() {
Observable.just("http://www.baidu.com")
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new Action1<String>() {
@Override
public void call(String s) {
System.out.println("在UI线程执行");
}
});
}
/**
* unsubscribe 在他当前执行的地方终止
*/
@Test
public void unsubscribe() {
Subscription subscribe = Observable.just("hello world")
.subscribe(new Action1<String>() {
@Override
public void call(String s) {
System.out.println(s);
}
});
subscribe.unsubscribe();
System.out.println(subscribe.isUnsubscribed());
}
}
