Android 用Retrofit进行网络获取数据，recyclerview进行展示在Fragment里，并存入到GreenDao数据库中

MainActivity的代码

package wangyetian.bwie.com.myapplication.activity;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.view.View;import android.widget.FrameLayout;import android.widget.RadioButton;import butterknife.Bind;import butterknife.ButterKnife;import butterknife.OnClick;import wangyetian.bwie.com.myapplication.R;import wangyetian.bwie.com.myapplication.fragment.HomePageFragment;import wangyetian.bwie.com.myapplication.fragment.IdeaFragment;import wangyetian.bwie.com.myapplication.fragment.InformFragment;import wangyetian.bwie.com.myapplication.fragment.MarketFragment;import wangyetian.bwie.com.myapplication.fragment.MoreFragment;public class MainActivity extends AppCompatActivity {    @Bind(R.id.homepage)    RadioButton homepage;    @Bind(R.id.idea)    RadioButton idea;    @Bind(R.id.market)    RadioButton market;    @Bind(R.id.inform)    RadioButton inform;    @Bind(R.id.more)    RadioButton more;    @Bind(R.id.Fragment)    FrameLayout Fragment;    private HomePageFragment homePageFragment;    private IdeaFragment ideaFragment;    private InformFragment informFragment;    private MarketFragment marketFragment;    private MoreFragment moreFragment;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        ButterKnife.bind(this);        homePageFragment = new HomePageFragment();        ideaFragment = new IdeaFragment();        informFragment = new InformFragment();        marketFragment = new MarketFragment();        moreFragment = new MoreFragment();        getSupportFragmentManager().beginTransaction().add(R.id.Fragment, homePageFragment).commit();        getSupportFragmentManager().beginTransaction().add(R.id.Fragment, ideaFragment).commit();        getSupportFragmentManager().beginTransaction().add(R.id.Fragment, informFragment).commit();        getSupportFragmentManager().beginTransaction().add(R.id.Fragment, marketFragment).commit();        getSupportFragmentManager().beginTransaction().add(R.id.Fragment, moreFragment).commit();        getSupportFragmentManager().beginTransaction().show(homePageFragment).commit();        getSupportFragmentManager().beginTransaction().hide(ideaFragment).commit();        getSupportFragmentManager().beginTransaction().hide(informFragment).commit();        getSupportFragmentManager().beginTransaction().hide(marketFragment).commit();        getSupportFragmentManager().beginTransaction().hide(moreFragment).commit();    }        //网络判断//    public boolean isNetworkConnected(Context context) {//        if (context != null) {//            ConnectivityManager mConnectivityManager = (ConnectivityManager) context//                    .getSystemService(Context.CONNECTIVITY_SERVICE);//            NetworkInfo mNetworkInfo = mConnectivityManager.getActiveNetworkInfo();//            if (mNetworkInfo != null) {//                Toast.makeText(context, "有网", Toast.LENGTH_SHORT).show();//                EventBus.getDefault().postSticky("0");//                return mNetworkInfo.isAvailable();//            }else{//                Toast.makeText(context, "无网", Toast.LENGTH_SHORT).show();//                EventBus.getDefault().postSticky("1");//            }//        }//        return false;//    }    @OnClick({R.id.homepage, R.id.idea, R.id.market, R.id.inform, R.id.more})    public void onViewClicked(View view) {        switch (view.getId()) {            case R.id.homepage:                getSupportFragmentManager().beginTransaction().show(homePageFragment).commit();                getSupportFragmentManager().beginTransaction().hide(ideaFragment).commit();                getSupportFragmentManager().beginTransaction().hide(informFragment).commit();                getSupportFragmentManager().beginTransaction().hide(marketFragment).commit();                getSupportFragmentManager().beginTransaction().hide(moreFragment).commit();                break;            case R.id.idea:                getSupportFragmentManager().beginTransaction().hide(homePageFragment).commit();                getSupportFragmentManager().beginTransaction().show(ideaFragment).commit();                getSupportFragmentManager().beginTransaction().hide(informFragment).commit();                getSupportFragmentManager().beginTransaction().hide(marketFragment).commit();                getSupportFragmentManager().beginTransaction().hide(moreFragment).commit();                break;            case R.id.market:                getSupportFragmentManager().beginTransaction().hide(homePageFragment).commit();                getSupportFragmentManager().beginTransaction().hide(ideaFragment).commit();                getSupportFragmentManager().beginTransaction().show(informFragment).commit();                getSupportFragmentManager().beginTransaction().hide(marketFragment).commit();                getSupportFragmentManager().beginTransaction().hide(moreFragment).commit();                break;            case R.id.inform:                getSupportFragmentManager().beginTransaction().hide(homePageFragment).commit();                getSupportFragmentManager().beginTransaction().hide(ideaFragment).commit();                getSupportFragmentManager().beginTransaction().hide(informFragment).commit();                getSupportFragmentManager().beginTransaction().show(marketFragment).commit();                getSupportFragmentManager().beginTransaction().hide(moreFragment).commit();                break;            case R.id.more:                getSupportFragmentManager().beginTransaction().hide(homePageFragment).commit();                getSupportFragmentManager().beginTransaction().hide(ideaFragment).commit();                getSupportFragmentManager().beginTransaction().hide(informFragment).commit();                getSupportFragmentManager().beginTransaction().hide(marketFragment).commit();                getSupportFragmentManager().beginTransaction().show(moreFragment).commit();                break;            default:                break;        }    }}

Fragmeng里的代码

package wangyetian.bwie.com.myapplication.fragment;import android.os.Bundle;import android.support.annotation.Nullable;import android.support.v4.app.Fragment;import android.support.v7.widget.LinearLayoutManager;import android.support.v7.widget.RecyclerView;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import java.util.List;import wangyetian.bwie.com.myapplication.R;import wangyetian.bwie.com.myapplication.activity.IApplication;import wangyetian.bwie.com.myapplication.adapter.MyAdapter;import wangyetian.bwie.com.myapplication.bean.NetDataBean;import wangyetian.bwie.com.myapplication.bean.NewslistBean;import wangyetian.bwie.com.myapplication.presenter.MyPresenter;import wangyetian.bwie.com.myapplication.view.IView;public class HomePageFragment extends Fragment implements IView {    private MyPresenter presenter;    private RecyclerView recyclerView;    private LinearLayoutManager manager;    private MyAdapter adapter;    @Nullable    @Override    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {        View view = View.inflate(getActivity(), R.layout.home_page_fragment, null);        recyclerView = view.findViewById(R.id.recyclerview);        presenter = new MyPresenter(this);        presenter.get();        manager = new LinearLayoutManager(getActivity(), LinearLayoutManager.VERTICAL, false);        adapter = new MyAdapter(getActivity());        recyclerView.setAdapter(adapter);        recyclerView.setLayoutManager(manager);        IApplication.session.getNewslistBeanDao().loadAll();//        EventBus.getDefault().register(this);        List list1 = presenter.getdb();        if(list1 == null || list1.size() == 0){            presenter.get();        }else {            adapter.addList(list1);        }        return view;    }    @Override    public void onSuccess(NetDataBean bean) {        adapter.addData(bean);    }    @Override    public void onFailure(Exception e) {    }//    @Subscribe(threadMode = ThreadMode.MAIN,sticky = true)//    public void getEventBus(String i){//        if (i.equals("0")){//            return;//        }else{//            List datalist = IApplication.session.getNewslistBeanDao().loadAll();//            MyAdapter myAdapter = new MyAdapter(getActivity(),datalist);//            recyclerView.setAdapter(myAdapter);////        }////    }//    @Override//    public void onDestroyView() {//        super.onDestroyView();//        EventBus.getDefault().unregister(this);//    }}

retrofit网络获取代码

package wangyetian.bwie.com.myapplication.activity;import retrofit2.Call;import retrofit2.http.Field;import retrofit2.http.FormUrlEncoded;import retrofit2.http.GET;import retrofit2.http.POST;import retrofit2.http.Query;import wangyetian.bwie.com.myapplication.bean.NetDataBean;/** * Created by hp on 2017/12/2. */public interface IGetDataBase {    @GET("/nba/?")    Call get(@Query("key") String key,@Query("num") int num);    @FormUrlEncoded    @POST("/nba/?")    Call post(@Field("key") String key,@Query("num") int num);}

初始化类的代码

package wangyetian.bwie.com.myapplication.activity;import android.app.Application;import com.facebook.drawee.backends.pipeline.Fresco;import org.greenrobot.greendao.database.Database;import retrofit2.Retrofit;import retrofit2.converter.gson.GsonConverterFactory;import wangyetian.bwie.com.myapplication.dao.DaoMaster;import wangyetian.bwie.com.myapplication.dao.DaoSession;/** * Created by hp on 2017/12/2. */public class IApplication extends Application {    public static IGetDataBase iGetDataBase;    public static DaoSession session;    @Override    public void onCreate() {        super.onCreate();        Fresco.initialize(this);        Retrofit retrofit = new Retrofit.Builder()                .baseUrl("http://api.tianapi.com")                .addConverterFactory(GsonConverterFactory.create())                .build();        iGetDataBase = retrofit.create(IGetDataBase.class);        DaoMaster.DevOpenHelper helper = new DaoMaster.DevOpenHelper(this,"tests");        Database database = helper.getWritableDb();        session = new DaoMaster(database).newSession();    }}

adapter适配器代码

package wangyetian.bwie.com.myapplication.adapter;import android.content.Context;import android.support.v7.widget.RecyclerView;import android.view.View;import android.view.ViewGroup;import android.widget.TextView;import com.facebook.drawee.view.SimpleDraweeView;import java.util.ArrayList;import java.util.List;import wangyetian.bwie.com.myapplication.R;import wangyetian.bwie.com.myapplication.bean.NetDataBean;import wangyetian.bwie.com.myapplication.bean.NewslistBean;/** * Created by hp on 2017/12/2. */public class MyAdapter extends RecyclerView.Adapter {    private Context context;    private List list;    public void addData(NetDataBean bean) {        if (list == null) {            list = new ArrayList<>();        }        list.addAll(bean.getNewslist());        notifyDataSetChanged();    }    public void addList(List bean) {        if (list == null) {            list = new ArrayList<>();        }        list.addAll(bean);        notifyDataSetChanged();    }    public MyAdapter(Context context) {        this.context = context;    }    @Override    public MyHolder onCreateViewHolder(ViewGroup parent, int viewType) {        View view = View.inflate(context,R.layout.item,null);        return new MyHolder(view);    }    @Override    public void onBindViewHolder(MyHolder holder, int position) {        holder.simpleDraweeView.setImageURI(list.get(position).getPicUrl());        holder.tv_title.setText(list.get(position).getTitle());        holder.tv_source.setText(list.get(position).getCtime());    }        @Override        public int getItemCount() {            return list == null?0:list.size();        }        static class MyHolder extends RecyclerView.ViewHolder{            SimpleDraweeView simpleDraweeView;            TextView tv_title,tv_source;        public MyHolder(View itemView) {            super(itemView);            simpleDraweeView = itemView.findViewById(R.id.simpledraweeview);            tv_title = itemView.findViewById(R.id.tv_title);            tv_source = itemView.findViewById(R.id.tv_source);        }    }}

MVP的View层代码

package wangyetian.bwie.com.myapplication.view;import wangyetian.bwie.com.myapplication.bean.NetDataBean;/** * Created by hp on 2017/12/2. */public interface IView {    public void onSuccess(NetDataBean bean);    public void onFailure(Exception e);}

MVP的Model层接口代码

package wangyetian.bwie.com.myapplication.model;import wangyetian.bwie.com.myapplication.bean.NetDataBean;/** * Created by hp on 2017/12/2. */public interface IModel {    public void onSuccess(NetDataBean bean);    public void onFailure(Exception e);}

MVP的Model层代码

package wangyetian.bwie.com.myapplication.model;import java.util.List;import retrofit2.Call;import retrofit2.Callback;import retrofit2.Response;import wangyetian.bwie.com.myapplication.activity.IApplication;import wangyetian.bwie.com.myapplication.bean.NetDataBean;import wangyetian.bwie.com.myapplication.bean.NewslistBean;import wangyetian.bwie.com.myapplication.dao.DaoSession;/** * Created by hp on 2017/12/2. */public class MyModel {    public void getData(final IModel callback){        Call call = IApplication.iGetDataBase.get("11ebce8ebe253e019b886ae1547b07d7",10);        call.enqueue(new Callback() {            @Override            public void onResponse(Call call, Response response) {                NetDataBean bean = response.body();                callback.onSuccess(bean);                IApplication.session.getNewslistBeanDao().insertInTx(bean.getNewslist());            }            @Override            public void onFailure(Call call, Throwable t) {                callback.onFailure(new Exception(""));            }        });    }    public void postDat(final IModel callback){        Call call = IApplication.iGetDataBase.post("11ebce8ebe253e019b886ae1547b07d7",10);        call.enqueue(new Callback() {            @Override            public void onResponse(Call call, Response response) {                NetDataBean bean = response.body();                callback.onSuccess(bean);            }            @Override            public void onFailure(Call call, Throwable t) {                callback.onFailure(new Exception(""));            }        });    }    public List getdb(DaoSession session){        List list = session.getNewslistBeanDao().loadAll();        return list;    }}

MVP的Presente层r的代码

package wangyetian.bwie.com.myapplication.presenter;import java.util.List;import wangyetian.bwie.com.myapplication.activity.IApplication;import wangyetian.bwie.com.myapplication.bean.NetDataBean;import wangyetian.bwie.com.myapplication.bean.NewslistBean;import wangyetian.bwie.com.myapplication.model.IModel;import wangyetian.bwie.com.myapplication.model.MyModel;import wangyetian.bwie.com.myapplication.view.IView;/** * Created by hp on 2017/12/2. */public class MyPresenter {    private IView view;    private MyModel model;    public MyPresenter(IView view) {        this.view = view;        this.model = new MyModel();    }    public List getdb(){        List list = model.getdb(IApplication.session);        return list;    }    public void get(){        model.getData(new IModel() {            @Override            public void onSuccess(NetDataBean bean) {                if (view != null){                    view.onSuccess(bean);                }            }            @Override            public void onFailure(Exception e) {                if (view != null){                    view.onFailure(e);                }            }        });    }    public void post(){        model.postDat(new IModel() {            @Override            public void onSuccess(NetDataBean bean) {                if (view != null){                    view.onSuccess(bean);                }            }            @Override            public void onFailure(Exception e) {                if (view != null){                    view.onFailure(e);                }            }        });    }}

MainActivity的布局

<?xml version="1.0" encoding="utf-8"?>

recyclerview的布局自行定义，bean类自己定义

greendao的集成和使用可以去这个网址查看：http://www.jianshu.com/p/853401a7d02b

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