Retrofit+Rxjava 等

/**
 * APIKEY=‘71e58b5b2f930eaf1f937407acde08fe’
 * http://api.tianapi.com/nba/?key=APIKEY&num=10

*/

  compile 'io.reactivex:rxjava:1.3.4'
    compile 'io.reactivex:rxandroid:1.2.1'
    compile 'com.squareup.retrofit2:retrofit:2.3.0'
    compile 'com.squareup.retrofit2:converter-gson:2.3.0'
    compile 'com.squareup.retrofit2:adapter-rxjava:2.3.0'
    compile 'com.squareup.retrofit2:adapter-rxjava:2.3.0-beta4'
    compile 'com.squareup.okhttp3:okhttp:3.9.0'

<uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>

public class RetrofitUtils {
    private static volatile RetrofitUtils instance;
    private Retrofit retrofit;

    private RetrofitUtils() {
    }

    private RetrofitUtils(String baseUrl) {
        OkHttpClient client = new OkHttpClient();
        retrofit = new Retrofit.Builder()
                .client(client)
                .addCallAdapterFactory(RxJavaCallAdapterFactory.create())
                .addConverterFactory(GsonConverterFactory.create())
                .baseUrl(baseUrl)
                .build();
    }

    public static RetrofitUtils getInstance(String baseUrl) {
        if (instance == null) {
            synchronized (RetrofitUtils.class) {
                if (null == instance) {
                    instance = new RetrofitUtils(baseUrl);

                }
            }
        }
        return instance;

    }

    public static RetrofitUtils getInstance() {
        if (null == instance) {
            /**
             * APIKEY=‘71e58b5b2f930eaf1f937407acde08fe’
             * http://api.tianapi.com/nba/?key=APIKEY&num=10
             */
            return getInstance("http://api.tianapi.com/");
        }
        return instance;
    }

    public Retrofit getRetrofit() {
        return retrofit;
    }
}

public interface BlogService {
    @GET("nba/")
    Observable<JavaBean> getUrl(@Query("key") String key, @Query("num") int num);

}

public interface NewsView {
    void success(List<JavaBean.NewslistBean> data);
    void failed(String e);
}

public class NewsPresenter {
    private NewsView inv;
    private Subscription subscribe;

    public void attachView(NewsView inv){
        this.inv = inv;
    }
    public void getNews(String key,int num){
        Retrofit retrofit = RetrofitUtils.getInstance().getRetrofit();
        BlogService service = retrofit.create(BlogService.class);
        subscribe = service.getUrl(key, num)
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Action1<JavaBean>() {
                    @Override
                    public void call(JavaBean javaBean) {
                        List<JavaBean.NewslistBean> list = javaBean.getNewslist();
                        inv.success(list);
                    }
                }, new Action1<Throwable>() {
                    @Override
                    public void call(Throwable throwable) {
                        inv.failed(throwable.getMessage());
                    }
                });

    }
    public void detachView(){
        // 当Activity销毁的时候取消订阅时间，防止内存泄漏
        if (subscribe != null) {
            if (subscribe.isUnsubscribed()) {
                subscribe.unsubscribe();
            }
        }
        if (inv!=null){
            inv = null;
        }
    }
}

public class MainActivity extends AppCompatActivity {
    private List<JavaBean.NewslistBean> list = new ArrayList<>();
    private NewsPresenter presenter;
    private MyAdapter adapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        getData(10);
    }

    public void getData(int count) {
        presenter = new NewsPresenter();
        presenter.getNews("71e58b5b2f930eaf1f937407acde08fe", count);
        presenter.attachView(new NewsView() {
            @Override
            public void success(List<JavaBean.NewslistBean> data) {
                list.clear();
                list.addAll(data);
              
//                if (adapter == null) {
//                    adapter = new MyAdapter(list, MainActivity.this);
//                } else {
//                    adapter.notifyDataSetChanged();
//                }
            }
            @Override
            public void failed(String e) {
            }
        });
    }
}