MVP+Rxjava+Retryfit+分页加载+RecyclerView展示，解析以集合开头的json数据

//加依赖
compile 'io.reactivex:rxandroid:1.1.0'
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 'com.google.code.gson:gson:2.8.1'
compile 'com.android.support:recyclerview-v7:26.+'
compile 'com.squareup.okhttp3:okhttp:3.9.0'
compile 'com.squareup.okio:okio:1.13.0'
compile 'com.squareup.okhttp3:logging-interceptor:3.4.1'
compile 'com.facebook.fresco:fresco:0.12.0'

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

public interface IView {
    void showList(List<MyBean.DataBean> list);
    void showError(String e);
}

public class Api {
    //http://mnews.gw.com.cn/wap/data/news/txs/page_1.json

    public static final String PATH = "http://mnews.gw.com.cn/";
}

public interface ApiService {
    @GET("wap/data/news/txs/page_{pages}.json")
    Observable<List<MyBean>> getdatas(@Path("pages")int pages) ;
}

public interface OnRequestListener {
    void OnSuccess(List<MyBean.DataBean> list);
    void OnError(String e);
}

public interface IModel {
    void RequestData(String url,int page,OnRequestListener onRequestListener);
}

public class ListModel implements IModel {
    @Override
    public void RequestData(String url,int page, final OnRequestListener onRequestListener) {
        //retrofit网络请求
        Retrofit retrofit=new Retrofit
                .Builder()
                .baseUrl(url)
                .addConverterFactory(GsonConverterFactory.create())
                .addCallAdapterFactory(RxJavaCallAdapterFactory.create())
                .build();
        ApiService apiService = retrofit.create(ApiService.class);
        //结合rxjava
        Observable<List<MyBean>> getdatas = apiService.getdatas(page);
        getdatas.subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Subscriber<List<MyBean>>() {
                    @Override
                    public void onCompleted() {

                    }

                    @Override
                    public void onError(Throwable e) {
                        onRequestListener.OnError(e.getMessage().toString());
                    }

                    @Override
                    public void onNext(List<MyBean> myBeen) {
                        List<MyBean.DataBean> data = myBeen.get(0).data;
                        onRequestListener.OnSuccess(data);
                    }
                });

    }
}

public interface IPresenter {
    void loadList(String url,int page);
}

public class ListPresenter implements IPresenter {
    private IView iView;
    private IModel iModel;

    public ListPresenter(IView iView) {
        this.iView = iView;
        iModel = new ListModel();
    }
    //model层与view层交互
    @Override
    public void loadList(String url,int page) {
      iModel.RequestData(url,page, new OnRequestListener() {
          @Override
          public void OnSuccess(List<MyBean.DataBean> list) {
              iView.showList(list);
          }

          @Override
          public void OnError(String e) {
              iView.showError(e);
          }
      });
    }
}

public class MyBean {

public HeaderBean header;
public List<DataBean> data;

public static MyBean objectFromData(String str) {

    return new Gson().fromJson(str, MyBean.class);
}

public static class HeaderBean {

 public int pagesize;
    public String last;
    public String pre;
    public String next;
    public int totalsize;
    public String first;
    public int totalpage;

    public static HeaderBean objectFromData(String str) {

        return new Gson().fromJson(str, HeaderBean.class);
    }
}

public static class DataBean {

 public String summary;
        public String img;
        public String advTypeShare;
        public String url;
        public int countid;
        public String id;
        public String title;
        public String otime;
        public String source;
        public String views;
        public String resType;

        public static DataBean objectFromData(String str) {

            return new Gson().fromJson(str, DataBean.class);
        }
    }
}

在清单列表注册
android:name=".App"

public class App extends Application {
    @Override
    public void onCreate() {
        super.onCreate();
        Fresco.initialize(this);
    }
}

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
    private Context context;
    private List<MyBean.DataBean> list;

    public MyAdapter(Context context, List<MyBean.DataBean> list) {
        this.context = context;
        this.list = list;
    }

    @Override
    public MyAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(context).inflate(R.layout.item, parent, false);
        return new ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(MyAdapter.ViewHolder holder, int position) {
      holder.img.setImageURI(list.get(position).img);
        holder.tv.setText(list.get(position).title);
    }

    @Override
    public int getItemCount() {
        return list.size();
    }
    public class ViewHolder extends RecyclerView.ViewHolder{
        public SimpleDraweeView img;
        public TextView tv;
        public ViewHolder(View itemView) {
            super(itemView);
            img=itemView.findViewById(R.id.item_img);
            tv=itemView.findViewById(R.id.tv);
        }
    }
}

public class MainActivity extends AppCompatActivity implements IView{

    private RecyclerView recycler;
    private MyAdapter myAdapter;
    private int p=1;
    private SwipeRefreshLayout swif;
    private ListPresenter listPresenter;
    private LinearLayoutManager linearLayoutManager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        recycler = (RecyclerView) findViewById(R.id.recycler);
        swif = (SwipeRefreshLayout) findViewById(R.id.swif);
        linearLayoutManager = new LinearLayoutManager(MainActivity.this);
        recycler.setLayoutManager(linearLayoutManager);
        listPresenter = new ListPresenter(this);
        listPresenter.loadList(Api.PATH,p);

    }

    @Override
    public void showList(final List<MyBean.DataBean> list) {
        //设置recyclerview展示
        myAdapter = new MyAdapter(MainActivity.this, list);
        recycler.setAdapter(myAdapter);
        recycler.addOnScrollListener(new RecyclerView.OnScrollListener() {
            @Override
            public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
                super.onScrollStateChanged(recyclerView, newState);
                int lastVisibleItemPosition = linearLayoutManager.findLastVisibleItemPosition();
                if (lastVisibleItemPosition == list.size() - 1) {
                    p++;
                    listPresenter.loadList(Api.PATH,p);
                }
            }
        });
        swif.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
            @Override
            public void onRefresh() {
                p++;
                listPresenter.loadList(Api.PATH,p);

                swif.setRefreshing(false);

            }
        });
    }

    @Override
    public void showError(String e) {
        Toast.makeText(this, "" + e, Toast.LENGTH_SHORT).show();
        Log.e("哈哈哈哈啊哈哈哈哈", e);
    }
}

//主页面布局
<android.support.v4.widget.SwipeRefreshLayout
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"

    android:id="@+id/swif">
    <android.support.v7.widget.RecyclerView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/recycler"></android.support.v7.widget.RecyclerView>

</android.support.v4.widget.SwipeRefreshLayout>

//Adapter布局
<com.facebook.drawee.view.SimpleDraweeView
    android:id="@+id/item_img"
    android:layout_width="150dp"
    android:layout_height="150dp"
    android:layout_margin="8dp"
    fresco:failureImage="@mipmap/ic_launcher" />
<TextView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/tv"
    android:text="dfdf"
    android:gravity="center"/>