一级购物车demo

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//导入依赖
compile 'com.squareup.okhttp3:okhttp:3.9.0'
compile 'com.squareup.okhttp3:logging-interceptor:3.9.0'
compile 'com.google.code.gson:gson:2.8.2'
compile 'com.nostra13.universalimageloader:universal-image-loader:1.9.5'
compile 'org.greenrobot:eventbus:3.1.1'
compile 'com.android.support:recyclerview-v7:26.0.0-alpha1'
//net包 Api
public class Api {

    public static final String url = "http://tingapi.ting.baidu.com/v1/restserver/ting?method=baidu.ting.billboard.billList&type=1&size=10&offset=0 ";
    public static final String shopUrl = "http://120.27.23.105/product/getCarts?uid=100";
}
//App
public class App extends Application {
    @Override
    public void onCreate() {
        super.onCreate();
        ImageLoaderConfiguration configuration=new ImageLoaderConfiguration.Builder(this).build();
        ImageLoader.getInstance().init(configuration);
    }
}
//HttpUtils
public class HttpUtils {
    private static HttpUtils httpUtils;
    private final OkHttpClient client;
    private HttpUtils(){
        //创建OkHttpClient
        //创建拦截器
        client = new OkHttpClient.Builder()
                .addInterceptor(new LoggingInterceptor())
                .build();
    }
    public static HttpUtils getHttpUtils(){
        if(httpUtils == null){
            synchronized (HttpUtils.class){
                if(httpUtils == null){
                    httpUtils=new HttpUtils();
                }
            }
        }
        return  httpUtils;
    }
    public void doGet(String url, Callback callback){
        Request request = new Request.Builder().url(url).build();
        client.newCall(request).enqueue(callback);
    }
    public void doPost(String url, Map<String, String> params, Callback callback) {
        //这里可以加网络判断

        //判断参数

        // 创建Request
        FormBody.Builder builder = new FormBody.Builder();
        for (Map.Entry<String, String> entry : params.entrySet()) {
            builder.add(entry.getKey(), entry.getValue());
        }
        FormBody formBody = builder.build();
        Request request = new Request.Builder()
                .url(url)
                .post(formBody)
                .build();
        client.newCall(request).enqueue(callback);
    }
}
//OnNetListener
public interface OnNetListener<T> {    public void onSuccess(T t);
    public void onFailure(Exception e);
}
//LoggingInterceptor拦截器
public class LoggingInterceptor implements Interceptor{
    private static final String UA = "User-Agent";
    @Override
    public Response intercept(Chain chain) throws IOException {
        Request request = chain.request()
                .newBuilder()
                .addHeader(UA, makeUA())
                .build();
        return chain.proceed(request);
    }
    private String makeUA() {
        String s = Build.BRAND + "/" + Build.MODEL + "/" + Build.VERSION.RELEASE;
        return Build.BRAND + "/" + Build.MODEL + "/" + Build.VERSION.RELEASE;
    }
}
//展示数据的model层接口
public interface ISongModel {
    public void GetSong(OnNetListener<SongBean> onNetListener);
}

//展示数据的model层
public class SongModel implements ISongModel {
   private Handler handler=new Handler(Looper.getMainLooper());
    @Override
    public void GetSong(final OnNetListener<SongBean> onNetListener) {
        HttpUtils.getHttpUtils().doGet(Api.url, new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {
                onNetListener.onFailure(e);
            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
                String string=response.body().string();
                Log.e("asf",string);
                final SongBean shopBean=new Gson().fromJson(string,SongBean.class);

                handler.post(new Runnable() {
                    @Override
                    public void run() {
                        onNetListener.onSuccess(shopBean);
                    }
                });
            }
        });
    }

}

/购物车的model层接口
public interface IShopModel {
    public void getShop(OnNetListener<ShopBean> onNetListener);
}

//购物车的model层
public class ShopModel implements IShopModel {
    private Handler handler=new Handler(Looper.getMainLooper());
    @Override
    public void getShop(final OnNetListener<ShopBean> onNetListener) {
        HttpUtils.getHttpUtils().doGet(Api.shopUrl, new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {
                onNetListener.onFailure(e);
            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
            String string=response.body().string();
                final ShopBean shopBean=new Gson().fromJson(string,ShopBean.class);
                handler.post(new Runnable() {
                    @Override
                    public void run() {
                       onNetListener.onSuccess(shopBean);
                    }
                });
            }
        });
    }
}
//展示数据的presenter
public class SongPresenter {
    private final ISongModel iSongModel;
    private IMainActivity iMainActivity;
    public SongPresenter(IMainActivity iMainActivity) {
        this.iMainActivity=iMainActivity;
        iSongModel=new SongModel();
    }
    public void getShow(){
        iSongModel.GetSong(new OnNetListener<SongBean>() {
            @Override
            public void onSuccess(SongBean songBean) {
                List<SongBean.SongListBean> song_list = songBean.getSong_list();
                iMainActivity.showList(song_list);
            }

            @Override
            public void onFailure(Exception e) {
                  e.printStackTrace();
            }
        });
    }
}
//购物车的presenter
public class ShopPresenter {
    private IShopModel iShopModel;
    private final IShopActivity iShopActivity;
    public ShopPresenter(IShopActivity iShopActivity){
        iShopModel=new ShopModel();
        this.iShopActivity=iShopActivity;
    }
    public void getShop(){
        iShopModel.getShop(new OnNetListener<ShopBean>() {
            @Override
            public void onSuccess(ShopBean shopBean) {
                List<ShopBean.DataBean.ListBean> childList=
                       new ArrayList<>();
                for(int i=0;i<shopBean.getData().size();i++){
                    ShopBean.DataBean dataBean = shopBean.getData().get(i);
                    List<ShopBean.DataBean.ListBean> list = dataBean.getList();
                    for(int j=0;j<list.size();j++){
                        childList.add(list.get(j));
                    }

                }
                iShopActivity.getShopList(childList);
            }

            @Override
            public void onFailure(Exception e) {
             e.printStackTrace();
            }
        });
    }
}
//展示数据view层接口
public interface IMainActivity {
    public void showList(List<SongBean.SongListBean> songList);
}
//展示数据MainActivity
public class MainActivity extends AppCompatActivity implements IMainActivity {

    private RecyclerView mRv;
    private MyAdapter adapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
        new SongPresenter(this).getShow();
        mRv.setLayoutManager(new LinearLayoutManager(this));
    }

    private void initView() {
        mRv = (RecyclerView) findViewById(R.id.rv);

    }

    @Override
    public void showList(List<SongBean.SongListBean> songList) {
        adapter=new MyAdapter(this,songList);
        mRv.setAdapter(adapter);
        adapter.setOnItemClickListener(new MyAdapter.OnItemClickListener() {
            @Override
            public void onItemClick(View view, int position) {
                Intent intent=new Intent(MainActivity.this, ShopActivity.class);
                startActivity(intent);
            }
        });
    }
}
//view层购物车接口
public interface IShopActivity {
    public void getShopList(List<ShopBean.DataBean.ListBean> myList);
}
//view层购物车方法
public class ShopActivity extends AppCompatActivity implements IShopActivity {

    private RecyclerView mElv;
    private CheckBox mCheckbox2;
    private TextView mPriceTv;
    private TextView mNumTv;
    private MyShopAdapter shopAdapter;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_shop);
        initView();
        //注册
        EventBus.getDefault().register(this);
        new ShopPresenter(this).getShop();
        mElv.setLayoutManager(new LinearLayoutManager(this));
        mCheckbox2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                shopAdapter.allSelect(mCheckbox2.isChecked());
            }
        });
    }

    private void initView() {
        mElv = (RecyclerView) findViewById(R.id.elv);
        mCheckbox2 = (CheckBox) findViewById(R.id.checkbox2);
        mPriceTv = (TextView) findViewById(R.id.tv_price);
        mNumTv = (TextView) findViewById(R.id.tv_num);
    }

    @Override
    public void getShopList(List<ShopBean.DataBean.ListBean> myList) {
         shopAdapter=new MyShopAdapter(myList,this);
          mElv.setAdapter(shopAdapter);

    }
    @Subscribe
    public void onMessageEvent(MessageEvent event){
        mCheckbox2.setChecked(event.isChecked());
    }
    //接收价格
    @Subscribe
    public void onMessageEvent(PriceAndCountEvent event) {
        mNumTv.setText("结算(" + event.getCount() + ")");
        mPriceTv.setText(event.getPrice() + "");
    }
    @Override
    protected void onDestroy() {
        super.onDestroy();
        EventBus.getDefault().unregister(this);

    }
}
//evevtbusevent层传数据的方法
//传价格数量
public class PriceAndCountEvent {
    private int price;
    private int count;

    public int getPrice() {
        return price;
    }

    public void setPrice(int price) {
        this.price = price;
    }

    public int getCount() {
        return count;
    }

    public void setCount(int count) {
        this.count = count;
    }
}
//传全选按钮
public class MessageEvent {
    private boolean checked;

    public boolean isChecked() {
        return checked;
    }

    public void setChecked(boolean checked) {
        this.checked = checked;
    }
}

package mvpframework.bwie.com.monixmykdemo.adapter;
import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

import com.nostra13.universalimageloader.core.ImageLoader;

import java.util.List;

import mvpframework.bwie.com.monixmykdemo.R;
import mvpframework.bwie.com.monixmykdemo.bean.SongBean;
//展示RecyclerView的适配器

public class MyAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> implements View.OnClickListener {    private List<SongBean.SongListBean> list;    private Context context;    //设置点击事件的变量    private OnItemClickListener mOnItemClickListener = null;    public MyAdapter(Context context, List<SongBean.SongListBean> list) {        this.context = context;        this.list = list;    }    @Override    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {        View view = LayoutInflater.from(context).inflate(R.layout.item_song, parent, false);        //设置点击事件        view.setOnClickListener(this);        return new MyViewHolder(view);    }    @Override    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {        final SongBean.SongListBean dataBean = list.get(position);        final MyViewHolder myViewHolder = (MyViewHolder) holder;        myViewHolder.itemView.setTag(position);        myViewHolder.song_title.setText(dataBean.getArtist_name());        myViewHolder.song_date.setText(dataBean.getTitle());        String imgs=dataBean.getPic_big();        ImageLoader.getInstance().displayImage(imgs ,myViewHolder.song_iv);    }    @Override    public int getItemCount() {        return list.size();    }    @Override    public void onClick(View v) {        if (mOnItemClickListener != null) {            //注意这里使用getTag方法获取position            mOnItemClickListener.onItemClick(v,(int)v.getTag());        }    }    class MyViewHolder extends RecyclerView.ViewHolder{        private ImageView song_iv;        private TextView  song_title;        private TextView song_date;        public MyViewHolder(View itemView) {            super(itemView);            song_iv=itemView.findViewById(R.id.song_iv);            song_title=itemView.findViewById(R.id.song_title);            song_date=itemView.findViewById(R.id.song_date);        }    }    //定义点击接口    public static interface OnItemClickListener {        void onItemClick(View view , int position);    }    //最后暴露给外面的调用者，定义一个设置Listener的方法（）：    public void setOnItemClickListener(OnItemClickListener listener) {        this.mOnItemClickListener = listener;    }}
//一级购物车逻辑
public class MyShopAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
    private List<ShopBean.DataBean.ListBean> myList;
    private Context context;


    public MyShopAdapter(List<ShopBean.DataBean.ListBean> myList, Context context) {
        this.context = context;
        this.myList = myList;
    }

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



    @Override
    public void onBindViewHolder(RecyclerView.ViewHolder holder, final int position) {
        final ShopBean.DataBean.ListBean listBean = myList.get(position);
        final MyShopViewHolder myShopViewHolder = (MyShopViewHolder) holder;
        myShopViewHolder.mChildCb.setChecked(listBean.isChecked());
        myShopViewHolder.mTelTv.setText(listBean.getTitle());
        myShopViewHolder.mTimeTv.setText(listBean.getCreatetime());
        myShopViewHolder.mPriTv.setText(listBean.getPrice() + "");
        myShopViewHolder.mMv.setNum(listBean.getNum()+"");
        String[] split=listBean.getImages().split("\\|");
        ImageLoader.getInstance().displayImage(split[0] ,myShopViewHolder.mIv);
        myShopViewHolder.mChildCb.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //设置该条目对象里的checked属性值
                listBean.setChecked( myShopViewHolder.mChildCb.isChecked());
               //计算价格
                for (int i=0;i<myList.size();i++) {
                    PriceAndCountEvent compute = compute();
                    EventBus.getDefault().post(compute);
                    if (myShopViewHolder.mChildCb.isChecked()) {
                        if (isAllChildCbSelected()) {
                            changeAllCbState(true);
                        }
                        } else {
                            changeAllCbState(false);
                        }
                        notifyDataSetChanged();
                }
            }
        });


        //减
        myShopViewHolder.mMv.setDelClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                int num=myShopViewHolder.mMv.getNum();
                if(num == 1){

                    return ;
                }
                num--;
                listBean.setNum(num);
               if(myShopViewHolder.mChildCb.isChecked()){
                   EventBus.getDefault().post(compute());
                  notifyDataSetChanged();
               }
            }
        });
        //加
        myShopViewHolder.mMv.setAddClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                int num = myShopViewHolder.mMv.getNum();
                num++;
                listBean.setNum(num);
                if (myShopViewHolder.mChildCb.isChecked()) {
                    EventBus.getDefault().post(compute());
                }
                notifyDataSetChanged();
            }
        });
        //删除
        myShopViewHolder.mDelTv.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

               myList.remove(position);
                EventBus.getDefault().post(compute());
                notifyDataSetChanged();

            }
        });
    }



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

    class MyShopViewHolder extends RecyclerView.ViewHolder {
        private TextView mTelTv;
        private CheckBox mChildCb;
        private ImageView mIv;
        private TextView mContentTv;
        private TextView mTimeTv;
        private TextView mPriTv;
        private MyView mMv;
        private TextView mDelTv;
        public MyShopViewHolder(View itemView) {
            super(itemView);
            mTelTv = (TextView) itemView.findViewById(R.id.tv_tel);
            mChildCb = (CheckBox) itemView.findViewById(R.id.cb_child);
            mIv = (ImageView) itemView.findViewById(R.id.iv);
            mContentTv = (TextView) itemView.findViewById(R.id.tv_content);
            mTimeTv = (TextView) itemView.findViewById(R.id.tv_time);
            mPriTv = (TextView) itemView.findViewById(R.id.tv_pri);
            mMv = (MyView) itemView.findViewById(R.id.mv);
            mDelTv = (TextView) itemView.findViewById(R.id.tv_del);

        }

    }
    //计算价格
    private PriceAndCountEvent compute(){
        int count=0;
        int price=0;
        for(int i=0;i<myList.size();i++){
            ShopBean.DataBean.ListBean listBean = myList.get(i);
            if(listBean.isChecked()){
                price+=listBean.getPrice()*listBean.getNum();
                count+=listBean.getNum();
            }
        }
        PriceAndCountEvent priceAndCountEvent=new PriceAndCountEvent();
        priceAndCountEvent.setCount(count);
        priceAndCountEvent.setPrice(price);
        return priceAndCountEvent;
    }
    //让一级列表全选
    private boolean isAllChildCbSelected(){
        for (int i = 0; i < myList.size(); i++) {
            ShopBean.DataBean.ListBean listBeans = myList.get(i);
            if (!listBeans.isChecked()) {
                return false;
            }
        }
        return true;

    }
    //让全选框选中
    private void changeAllCbState(boolean flag){
        MessageEvent messageEvent=new MessageEvent();
        messageEvent.setChecked(flag);
      EventBus.getDefault().post(messageEvent);
    }
    //点击全选的操作
    public void allSelect(boolean flag) {
        for (int i = 0; i < myList.size(); i++) {
            ShopBean.DataBean.ListBean beans = myList.get(i);
            beans.setChecked(flag);
        }
        EventBus.getDefault().post(compute());
        notifyDataSetChanged();
    }
}