Fresco+eventBus+GreenDao+Retrofit

主activity_xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">

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

    </android.support.v7.widget.RecyclerView>
</LinearLayout>

rv_view  item布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">
    <TextView
        android:id="@+id/tv_title"
        android:layout_width="match_parent"
        android:layout_height="30dp" />
    <TextView
        android:id="@+id/tv_text"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
</LinearLayout>

MainActivity

package com.bawie.www.demoweek.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.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Toast;

import com.bawie.www.demoweek.R;
import com.bawie.www.demoweek.ResultsBean;
import com.bawie.www.demoweek.adapter.MyAdapter;
import com.bawie.www.demoweek.callback.IView;
import com.bawie.www.demoweek.gen.ResultsBeanDao;
import com.bawie.www.demoweek.presenter.NewPresenter;
import com.bawie.www.demoweek.util.DBUtils;

import java.util.List;

import butterknife.BindView;
import butterknife.ButterKnife;
import butterknife.Unbinder;

/**
 * Created by 杨文倩 on 2017/12/2.
 */

public class FragmentOne extends Fragment implements IView {
    @BindView(R.id.rv)
    RecyclerView rv;
    Unbinder unbinder;
    List<ResultsBean> lists;
    private MyAdapter adapter;


    private NewPresenter presenter;
    private ResultsBeanDao dao;


    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_one, container, false);

        unbinder = ButterKnife.bind(this, view);
        presenter = new NewPresenter();
        dao = DBUtils.getInstance(getActivity()).getDao();


        //先从数据库取数据展示
        lists = dao.loadAll();
        Log.d("TT", "onCreateView: "+lists.size()+"1111111111111");
        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(getActivity());
        rv.setLayoutManager(linearLayoutManager);

        adapter = new MyAdapter(getActivity(), this.lists);
        rv.setAdapter(adapter);
        //如果数据库为空就从网路请求
        if(lists==null||lists.size()==0){
            Log.d("TT", "onCreateView: "+"ewrekgmtrghtkt");
            presenter.getData();
        }


       presenter.attchView(this);


        return view;

    }


    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

    }

    @Override
    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);


    }

    @Override
    public void onDestroyView() {
        super.onDestroyView();
        unbinder.unbind();

    }

    @Override
    public void success(List<ResultsBean> list) {

        if(list!=null){
            Log.d("TT", "success: "+list.toString());

           for (ResultsBean l:list){
                Log.d("TT", "success: "+l);
                dao.insert(l);
            }
            adapter.notifyDataSetChanged();
        }
    }

    @Override
    public void failed(String msg) {
        Toast.makeText(getActivity(),"请求失败",Toast.LENGTH_SHORT).show();
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        if(presenter!=null){
           presenter.detachView();
        }

    }
}

MainActivity判断联网

package com.bawie.www.demoweek;

import android.graphics.Color;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.Toast;

import com.bawie.www.demoweek.bean.IsBean;
import com.bawie.www.demoweek.fragment.FragmentFive;
import com.bawie.www.demoweek.fragment.FragmentFour;
import com.bawie.www.demoweek.fragment.FragmentOne;
import com.bawie.www.demoweek.fragment.FragmentThree;
import com.bawie.www.demoweek.fragment.FragmentTwo;
import com.bawie.www.demoweek.util.NetWorkUtils;
import com.hjm.bottomtabbar.BottomTabBar;

import org.greenrobot.eventbus.EventBus;
import org.greenrobot.eventbus.Subscribe;
import org.greenrobot.eventbus.ThreadMode;

import butterknife.BindView;
import butterknife.ButterKnife;

public class MainActivity extends AppCompatActivity {

    @BindView(R.id.bt)
    BottomTabBar bt;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ButterKnife.bind(this);
        EventBus.getDefault().register(this);
        bt.init(getSupportFragmentManager())
                .setImgSize(50,50)
                .setFontSize(8)
                .setTabPadding(4,6,10)
                .setChangeColor(Color.RED,Color.DKGRAY)
                .addTabItem("首页",R.drawable.home_, FragmentOne.class)
                .addTabItem("分类",R.drawable.fenlei, FragmentTwo.class)
                .addTabItem("发现",R.drawable.faxian, FragmentThree.class)
                .addTabItem("购物车",R.drawable.car, FragmentFour.class)
                .addTabItem("我的",R.drawable.my, FragmentFive.class)
                .isShowDivider(false)
                .setOnTabChangeListener(new BottomTabBar.OnTabChangeListener() {
                    @Override
                    public void onTabChange(int position, String name) {

                    }
                });

        boolean b = NetWorkUtils.isNetworkConnected(this);
        IsBean isBean = new IsBean();
        isBean.setFlag(b);
        EventBus.getDefault().post(isBean);

    }

    @Subscribe(threadMode = ThreadMode.MAIN) //在ui线程执行
    public void onDataSynEvent(IsBean event) {
        if(event.isFlag()){
            Toast.makeText(this,"玩家已上线",Toast.LENGTH_SHORT).show();
        }else{
            Toast.makeText(this,"网络飘走了",Toast.LENGTH_SHORT).show();
        }
    }
    @Override
    protected void onDestroy() {
        super.onDestroy();
        EventBus.getDefault().unregister(this);
    }
}

Newpresenter

package com.bawie.www.demoweek.presenter;

import com.bawie.www.demoweek.ResultsBean;
import com.bawie.www.demoweek.bean.MessageBean;
import com.bawie.www.demoweek.callback.ApiService;
import com.bawie.www.demoweek.callback.IView;
import com.bawie.www.demoweek.util.RetrofitUtils;

import java.util.List;

import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;
import retrofit2.Retrofit;

/**
 * Created by 杨文倩 on 2017/12/2.
 */

public class NewPresenter {


    private IView iView;

    public void attchView(IView iView){
        this.iView=iView;
    }

    public void getData(){
        RetrofitUtils instance = RetrofitUtils.getInstance();

        Retrofit retrofit = instance.getRetrofit();

        ApiService apiService = retrofit.create(ApiService.class);

        Call<MessageBean> call = apiService.getData("10", "1");

        call.enqueue(new Callback<MessageBean>() {
            @Override
            public void onResponse(Response<MessageBean> response) {
                MessageBean body = response.body();
                List<ResultsBean> results = body.getResults();
                if(results!=null){
                    iView.success(results);
                }

            }

            @Override
            public void onFailure(Throwable t) {
                if(t!=null){
                    iView.failed(t.getMessage());
                }
            }
        });
    }

    public void detachView(){
        if(iView!=null){
            iView=null;
        }
    }
}

IsBean

package com.bawie.www.demoweek.bean;

/**
 * Created by 杨文倩 on 2017/12/2.
 */

public class IsBean {

    private boolean flag;

    public boolean isFlag() {
        return flag;
    }

    public void setFlag(boolean flag) {
        this.flag = flag;
    }
}

MessageBean

package com.bawie.www.demoweek.bean;

import com.bawie.www.demoweek.ResultsBean;

import java.util.List;

/**
 * Created by 杨文倩 on 2017/12/2.
 */

public class MessageBean {


    private boolean error;
    private List<ResultsBean> results;

    public boolean isError() {
        return error;
    }

    public void setError(boolean error) {
        this.error = error;
    }

    public List<ResultsBean> getResults() {
        return results;
    }

    public void setResults(List<ResultsBean> results) {
        this.results = results;
    }

}

MyAdapter

package com.bawie.www.demoweek.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.bawie.www.demoweek.R;
import com.bawie.www.demoweek.ResultsBean;

import java.util.List;

/**
 * Created by 杨文倩 on 2017/12/2.
 */

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder>{

    private Context context;
    private List<ResultsBean> list;

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

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = View.inflate(context, R.layout.rv_view, null);
        ViewHolder holder = new ViewHolder(view);
        return holder;
    }


    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        holder.title.setText(list.get(position).getWho());
        holder.text.setText(list.get(position).getDesc());
    }

    @Override
    public int getItemCount() {
        return list.size();
    }

    class ViewHolder extends RecyclerView.ViewHolder {

        private final TextView title;
        private final TextView text;

        public ViewHolder(View itemView) {
            super(itemView);
            title = (TextView)itemView.findViewById(R.id.tv_title);
            text = (TextView) itemView.findViewById(R.id.tv_text);
        }
    }
}

接口类

package com.bawie.www.demoweek.callback;

import com.bawie.www.demoweek.bean.MessageBean;

import retrofit2.Call;
import retrofit2.http.GET;
import retrofit2.http.Path;

/**
 * Created by 杨文倩 on 2017/12/2.
 */

public interface ApiService {

    @GET("data/Android/{num}/{page}")
    Call<MessageBean> getData(@Path("num") String num, @Path("page") String page);
}

接口类2

package com.bawie.www.demoweek.callback;

import com.bawie.www.demoweek.ResultsBean;

import java.util.List;

/**
 * Created by 杨文倩 on 2017/12/2.
 */

public interface IView {

    void success(List<ResultsBean> list);
    void failed(String msg);
}

导入的依赖

 compile 'com.jakewharton:butterknife:8.8.1'
    annotationProcessor 'com.jakewharton:butterknife-compiler:8.8.1'
    compile 'org.greenrobot:greendao:3.2.0'
    compile 'com.hjm:BottomTabBar:1.1.1'
    compile 'com.jakewharton:butterknife:8.8.0'
    annotationProcessor 'com.jakewharton:butterknife-compiler:8.8.0'
    compile 'com.android.support:recyclerview-v7:25.0.0'
    compile 'com.facebook.fresco:fresco:0.11.0'
    compile 'org.greenrobot:eventbus:3.0.0'
    compile 'com.squareup.retrofit2:retrofit:2.0.0-beta3'
    compile 'com.squareup.retrofit2:converter-gson:2.0.0-beta3'

导入的greenDao

 greendao {
        schemaVersion 1
        daoPackage 'com.bawie.www.demoweek.gen'
        targetGenDir 'src/main/java'
    }

App的最上层

apply plugin: 'org.greenrobot.greendao'

工程的依赖里

 classpath 'org.greenrobot:greendao-gradle-plugin:3.2.1'
 mavenCentral();