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

最新推荐文章于 2019-06-11 14:12:15 发布

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最新推荐文章于 2019-06-11 14:12:15 发布

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本文链接：https://blog.youkuaiyun.com/Lay_y/article/details/78451394

本文详细介绍了如何在Android开发中结合Retrofit和RxJava1.x进行网络请求。重点讲解了RxJava的flatMap和Map操作符的使用，包括它们的区别和实际应用示例，帮助开发者更好地理解和掌握异步数据处理。

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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);
}