RxJava入门
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导入依赖
compile 'io.reactivex.rxjava2:rxandroid:2.0.1' compile 'io.reactivex.rxjava2:rxjava:2.1.7' compile 'com.squareup.retrofit2:retrofit:2.3.0' compile 'com.google.code.gson:gson:2.8.2' compile 'com.squareup.retrofit2:converter-gson:2.3.0' compile 'com.squareup.retrofit2:adapter-rxjava2:2.3.0'点击按钮触发事件,布局中的按钮
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="com.example.exercise_06_rxjava.MainActivity"> <Button android:id="@+id/btn" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Hello World!" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toRightOf="parent" app:layout_constraintTop_toTopOf="parent" /></LinearLayout>
retrofit 的接口类
public interface IInterface { @GET("/yunifang/mobile/home") Call<ResponseBody> get(); @GET("/yunifang/mobile/home") Observable<Bean> get1();}MainActivity
public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); findViewById(R.id.btn).setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { zip1(); } }); } Disposable disposable = null; private void onObserverable(){ //创建了一个被观察者 Observable<String> observable = Observable.create(new ObservableOnSubscribe<String>() { @Override public void subscribe(ObservableEmitter<String> e) throws Exception {// e 发射器 //发送onnext事件 for(int i=0;i<100;i++){// if(i == 50){// disposable.dispose();// } e.onNext(""+i); if(i == 50){// e.onComplete();// e.onError(new Exception("1")); } //只要执行了 onComplete onError ， 后续在发送的onNext 事件， 再也无法接受 }// e.onError(new Exception(""));// e.onComplete(); } }); //创建观察者 Observer observer = new Observer<String>(){ @Override public void onSubscribe(Disposable d) { disposable = d ;// 断开 被观察者和观察者之间的关系// disposable.dispose(); // 判断 被观察者和观察者 之间是否还订阅关系// disposable.isDisposed() } @Override public void onNext(String s) { //用于接受 被观察者所发送的事件 System.out.println("Observer s = " + s); } @Override public void onError(Throwable e) { //发生异常 System.out.println("onError s = " + e.getMessage()); } @Override public void onComplete() {// 事件完成 System.out.println("onComplete s = "); } }; //订阅 observable.subscribe(observer); } private void test1(){ Observable.create(new ObservableOnSubscribe<String>() { @Override public void subscribe(ObservableEmitter<String> e) throws Exception { System.out.println("Observable " + Thread.currentThread().getName()); for(int i=0;i<1000;i++){ e.onNext(i+""); } System.out.println("Observable over " ); }// subscribeOn 指定 被观察者所在的线程 }).subscribeOn(Schedulers.io())// 指定 观察者所在的线程 .observeOn(AndroidSchedulers.mainThread()) .subscribe(new Observer<String>() { @Override public void onSubscribe(Disposable d) { } @Override public void onNext(String s) { System.out.println("Observer " + Thread.currentThread().getName()); try { Thread.sleep(2000); } catch (InterruptedException e) { e.printStackTrace(); } System.out.println(" "+ s); } @Override public void onError(Throwable e) { } @Override public void onComplete() { } }); } private void test2(){ Flowable.create(new FlowableOnSubscribe<String>() { @Override public void subscribe(FlowableEmitter<String> e) throws Exception { for(int i=0;i<1000;i++){ e.onNext(""+i); } } }, BackpressureStrategy.LATEST) .subscribeOn(Schedulers.io()) .observeOn(AndroidSchedulers.mainThread()) .subscribe(new Consumer<String>() { @Override public void accept(String s) throws Exception { Thread.sleep(100); System.out.println("Consumer " + s); } }); } private void test3(){ Flowable.create(new FlowableOnSubscribe<String>() { @Override public void subscribe(FlowableEmitter<String> e) throws Exception { e.onNext("onnext"); e.onError(new Exception("1"));// e.onComplete(); } },BackpressureStrategy.BUFFER)// .subscribeOn(Schedulers.io())// .observeOn(AndroidSchedulers.mainThread()) .subscribe(new Consumer<String>() { @Override public void accept(String s) throws Exception {// onnext System.out.println("Consumer onnext" + s); } }, new Consumer<Throwable>() { @Override public void accept(Throwable throwable) throws Exception {// onerror System.out.println("Consumer onerror" + throwable.getMessage()); } }, new Action() { @Override public void run() throws Exception {// onComplet System.out.println("Consumer Action"); } }); } private void test4(){ Flowable.create(new FlowableOnSubscribe<Integer>() { @Override public void subscribe(FlowableEmitter<Integer> e) throws Exception { e.onNext(1); e.onError(new Exception("")); } },BackpressureStrategy.BUFFER).subscribe(new Consumer<Integer>() { @Override public void accept(Integer integer) throws Exception { System.out.println(" onNext"); } }, new Consumer<Throwable>() { @Override public void accept(Throwable throwable) throws Exception { System.out.println(" onError"); } }); } private void map(){ Flowable.create(new FlowableOnSubscribe<String>() { @Override public void subscribe(FlowableEmitter<String> e) throws Exception { e.onNext("11"); } },BackpressureStrategy.BUFFER) .map(new Function<String, Integer>() { @Override public Integer apply(String s) throws Exception { return Integer.valueOf(s); } }).subscribe(new Consumer<Integer>() { @Override public void accept(Integer integer) throws Exception { System.out.println("integer = " + integer); } }); } private void test5(){ Flowable.create(new FlowableOnSubscribe<String>() { @Override public void subscribe(final FlowableEmitter<String> e) throws Exception { Retrofit retrofit = new Retrofit.Builder() .baseUrl("http://m.yunifang.com") .build(); IInterface iInterface = retrofit.create(IInterface.class); iInterface.get().enqueue(new Callback<ResponseBody>() { @Override public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) { try { String result = response.body().string() ; e.onNext(result); } catch (IOException e1) { e1.printStackTrace(); } } @Override public void onFailure(Call<ResponseBody> call, Throwable t) { } }); } },BackpressureStrategy.BUFFER) .map(new Function<String, Bean>() { @Override public Bean apply(String s) throws Exception { Gson gson = new Gson(); return gson.fromJson(s,Bean.class); } }) .subscribeOn(Schedulers.io()) .observeOn(AndroidSchedulers.mainThread()) .subscribe(new Consumer<Bean>() { @Override public void accept(Bean bean) throws Exception { } }); } private void flatMap(){ // Observable.create(new ObservableOnSubscribe<String>() { // @Override// public void subscribe(final ObservableEmitter<String> e) throws Exception {//// e.onNext("1");// e.onNext("2");////// Retrofit retrofit = new Retrofit.Builder()//// .baseUrl("")//// .build();//////// final IInterface iInterface = retrofit.create(IInterface.class);//////// iInterface.get().enqueue(new Callback<ResponseBody>() {//// @Override//// public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {//////// try {//// String result = response.body().string();//////// e.onNext(result);//////////////// } catch (IOException e) {//// e.printStackTrace();//// }////// }//// @Override// public void onFailure(Call<ResponseBody> call, Throwable t) {//// }// });//// }// }).flatMap(new Function<String, ObservableSource<ArrayList>>() {// @Override// public ObservableSource<ArrayList> apply(String s) throws Exception {//////// ArrayList list = new ArrayList<>();// for (int i=0;i<3;i++){// list.add( s + " " + i);// }// return Observable.fromArray(list).delay(1, TimeUnit.SECONDS);// }// }).subscribe(new Consumer<ArrayList>() {// @Override// public void accept(ArrayList arrayList) throws Exception {////// for (int i=0;i<arrayList.size();i++){// System.out.println("arrayList = " + arrayList.get(i));// }//// }// }); } private void t1(IInterface iInterface,String result){ iInterface.get().enqueue(new Callback<ResponseBody>() { @Override public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) { try { String te = response.body().string(); } catch (IOException e) { e.printStackTrace(); } } @Override public void onFailure(Call<ResponseBody> call, Throwable t) { } }); } private void concatMap(){ Observable.create(new ObservableOnSubscribe<String>() { @Override public void subscribe(ObservableEmitter<String> e) throws Exception { e.onNext("1"); e.onNext("2"); e.onNext("3"); } }).concatMap(new Function<String, ObservableSource<ArrayList>>() { @Override public ObservableSource<ArrayList> apply(String s) throws Exception { ArrayList list = new ArrayList<>(); for (int i=0;i<3;i++){ list.add( s + " " + i); } return Observable.fromArray(list).delay(1, TimeUnit.SECONDS);// return null; } }).subscribe(new Consumer<ArrayList>() { @Override public void accept(ArrayList arrayList) throws Exception { for (int i=0;i<arrayList.size();i++){ System.out.println("arrayList = " + arrayList.get(i)); } } }); } private void zip(){ Observable<String> observable = Observable.create(new ObservableOnSubscribe<String>() { @Override public void subscribe(ObservableEmitter<String> e) throws Exception { e.onNext("1"); e.onNext("2"); e.onNext("3"); } }); Observable<String> observable1 = Observable.create(new ObservableOnSubscribe<String>() { @Override public void subscribe(ObservableEmitter<String> e) throws Exception { e.onNext("A"); e.onNext("B"); e.onNext("C"); } }); Observable.zip(observable, observable1, new BiFunction<String, String, String>() { @Override public String apply(String s, String s2) throws Exception { return s + s2;' } }).subscribe(new Consumer<String>() { @Override public void accept(String s) throws Exception { System.out.println("s = " + s); } }); } // rxjava 和retrofit 结合使用 private void zip1(){ Retrofit retrofit = new Retrofit.Builder() .baseUrl("http://m.yunifang.com") .addConverterFactory(GsonConverterFactory.create()) // call 转化成 Observerable .addCallAdapterFactory(RxJava2CallAdapterFactory.create()) .build(); IInterface iInterface = retrofit.create(IInterface.class); iInterface.get1() // 指定 被观察者 所在一个IO线程 .subscribeOn(Schedulers.io()) //指定观察者所在 住县城 .observeOn(AndroidSchedulers.mainThread()) .subscribe(new Consumer<Bean>() { @Override public void accept(Bean bean) throws Exception { System.out.println("bean = " + bean.toString()); } }); }}阅读全文
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