Retrofit结合RxJava1.x使用，RxJava变换flatMap和Map的使用

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//导入依赖compile 'com.squareup.retrofit2:retrofit:2.0.1'    compile 'com.squareup.retrofit2:converter-gson:2.0.1'    compile 'com.squareup.retrofit2:adapter-rxjava:2.0.1'    compile 'io.reactivex:rxandroid:1.1.0'    compile 'com.squareup.okhttp3:logging-interceptor:3.4.1'

//权限：<uses-permission android:name="android.permission.INTERNET"></uses-permission>

public class MainActivity extends AppCompatActivity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);    //    getNoParams();       // getHasParams();        getHasParams2();    }    private void getHasParams2() {        Retrofit retrofit = new Retrofit.Builder().baseUrl(Api.BASE_URL).addConverterFactory(GsonConverterFactory.create())                .addCallAdapterFactory(RxJavaCallAdapterFactory.create())//支持RxJava                .build();        ApiService apiService = retrofit.create(ApiService.class);        //得到Observable        Observable<List<Data>> observable = apiService.getHasParams2("square", "retrofit");        observable.subscribeOn(Schedulers.io())                .observeOn(AndroidSchedulers.mainThread())                .flatMap(new Func1<List<Data>, Observable<Data>>() {                    @Override                    public Observable<Data> call(List<Data> datas) {//一对多的关系                        return Observable.from(datas);//循环取Data 代替了迷之缩进的方式获取                    }                }).subscribe(new Subscriber<Data>() {            @Override            public void onCompleted() {            }            @Override            public void onError(Throwable e) {            }            @Override            public void onNext(Data data) {//根据被观察生产多少个事件就消费多少个                String avatar_url = data.getAvatar_url();                Log.i("xxx", avatar_url);            }        });    }    private void getHasParams() {        Retrofit retrofit = new Retrofit.Builder().baseUrl(Api.BASE_URL).addConverterFactory(GsonConverterFactory.create())                .addCallAdapterFactory(RxJavaCallAdapterFactory.create())//支持RxJava                .build();        ApiService apiService = retrofit.create(ApiService.class);        //得到Observable        Observable<User> observable = apiService.getHasParams("forever");        observable.subscribeOn(Schedulers.io())                .observeOn(AndroidSchedulers.mainThread())                .map(new Func1<User, User>() {//直接变换 一对一的关系                    @Override                    public User call(User user) {                        return user;                    }                }).subscribe(new Subscriber<User>() {            @Override            public void onCompleted() {            }            @Override            public void onError(Throwable e) {            }            @Override            public void onNext(User user) {                String avatar_url = user.getAvatar_url();                Log.i("xxx", avatar_url);            }        });    }    private void getNoParams() {        Retrofit retrofit = new Retrofit.Builder().baseUrl(Api.BASE_PATH).addConverterFactory(GsonConverterFactory.create())                .addCallAdapterFactory(RxJavaCallAdapterFactory.create())//支持RxJava                .build();        ApiService apiService = retrofit.create(ApiService.class);        //得到Observable        Observable<News> observable = apiService.getNoParams();//生产事件        //被观察者订阅观察 默认在同一个线程         observable.subscribeOn(Schedulers.io())//指定IO做耗时操作                .observeOn(AndroidSchedulers.mainThread())//指定更新UI在主线程                .subscribe(new Observer<News>() {                    @Override                    public void onCompleted() {//完成                    }                    @Override                    public void onError(Throwable e) {//失败                        Log.i("xxx", e.getMessage());                    }                    @Override                    public void onNext(News news) {//消费事件                        List<News.AdsBean> ads = news.getAds();                        for (int i = 0; i < ads.size(); i++) {                            News.AdsBean adsBean = ads.get(i);                            String gonggaoren = adsBean.getGonggaoren();                            Log.i("xxx", gonggaoren);                        }                    }                });    }}//网络请求接口public class Api {    public static  final  String BASE_PATH = "http://service.meiyinkeqiu.com/service/";    public static final String BASE_URL = "https://api.github.com/";}public interface ApiService {    /**     * 结合Retrofit+RxJava     * thtp://service.meiyinkeqiu.com/service/ads/cptj     * @param     * @return     */    @GET("ads/cptj")    Observable<News> getNoParams();    /**     * 结合RxJava     * @param user     * @return     * https://api.github.com/users/forever     */    @GET("users/{user}")  Observable<User>  getHasParams(@Path("user")String user);    //第三个接口,,兼容json解析功能，，集成rxjava  square  retrofit    //https://api.github.com/repos/square/retrofit/contributors    @GET("repos/{square}/{retrofit}/contributors")   Observable<List<Data>> getHasParams2(@Path("square")String square, @Path("retrofit")String retrofit);}

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