需求：mvp实现

• activity_details

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical">    <TextView        android:layout_width="match_parent"        android:layout_height="40dp"        android:background="#ff3660"        android:gravity="center"        android:text="商品详情"        android:textColor="#ffffff"        android:textSize="25sp" />    <ImageView        android:id="@+id/iv"        android:layout_width="match_parent"        android:layout_height="400dp" />    <TextView        android:id="@+id/tvBargainPrice"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_marginBottom="10dp"        android:layout_marginTop="10dp" />    <TextView        android:id="@+id/tvPrice"        android:layout_width="wrap_content"        android:layout_height="wrap_content" />    <View        android:layout_width="match_parent"        android:layout_height="match_parent"        android:layout_weight="1">View>    <LinearLayout        android:layout_width="match_parent"        android:layout_height="40dp">        <TextView            android:id="@+id/tvCart"            android:layout_width="0dp"            android:layout_height="match_parent"            android:layout_weight="1"            android:background="#33000000"            android:gravity="center"            android:text="购物车" />        <TextView            android:id="@+id/tvAddCart"            android:layout_width="0dp"            android:layout_height="match_parent"            android:layout_weight="1"            android:background="#33000000"            android:gravity="center"            android:text="加入购物车" />    LinearLayout>LinearLayout>

view层

• DetailsActivity

public class DetailsActivity extends AppCompatActivity implements IDetailsListener, View.OnClickListener {    private DetailsShopPresenter detailsPresenter;    private ImageView mIv;    private TextView mTvBargainPrice;    private TextView mTvPrice;    private TextView mTvCart;    private TextView mTvAddCart;    private DetailsAddPresenter addCartPresenter;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_details);        initView();        detailsPresenter = new DetailsShopPresenter(this);        addCartPresenter = new DetailsAddPresenter(this);        detailsPresenter.getProductDetail();    }    @Override    protected void onDestroy() {        super.onDestroy();        detailsPresenter.dettach();        addCartPresenter.dettach();    }    @Override    public void show(DetailsShopBean detailsBean) {        String images = detailsBean.getData().getImages();        String[] split = images.split("\\|");        Glide.with(this).load(split[0]).into(mIv);        TextPaint paint = mTvBargainPrice.getPaint();        paint.setFlags(Paint.STRIKE_THRU_TEXT_FLAG);        mTvBargainPrice.setText("原价：" + detailsBean.getData().getBargainPrice());        mTvPrice.setText("优惠价：" + detailsBean.getData().getPrice());    }    @Override    public void show(String str) {        Toast.makeText(DetailsActivity.this, str, Toast.LENGTH_SHORT).show();    }    private void initView() {        mIv = (ImageView) findViewById(R.id.iv);        mTvBargainPrice = (TextView) findViewById(R.id.tvBargainPrice);        mTvPrice = (TextView) findViewById(R.id.tvPrice);        mTvCart = (TextView) findViewById(R.id.tvCart);        mTvAddCart = (TextView) findViewById(R.id.tvAddCart);        mTvCart.setOnClickListener(this);        mTvAddCart.setOnClickListener(this);    }    @Override    public void onClick(View v) {        switch (v.getId()) {            default:                break;            case R.id.tvCart:                Intent intent = new Intent(DetailsActivity.this, SecondActivity.class);                startActivity(intent);                break;            case R.id.tvAddCart:                addCartPresenter.addCart();                break;        }    }

• • IDetailsListener

public interface IDetailsListener {    void show(DetailsShopBean detailsBean);    void show(String str);}

presenter层

• • DetailsShopPresenter

// 购物车public class DetailsShopPresenter {    private IDetailsListener iMainListener;    private DetailsService detailsService;    public DetailsShopPresenter(IDetailsListener iMainListener) {        this.iMainListener = iMainListener;        detailsService = new DetailsModel();    }    public void dettach() {        iMainListener = null;    }    public void getProductDetail() {        Map params = new HashMap<>();        params.put("pid", "71");        detailsService.getProductDetail(params, new OnNetListener() {            @Override            public void onSuccess(DetailsShopBean detailsBean) {                if (iMainListener != null) {                    iMainListener.show(detailsBean);                }            }            @Override            public void onFailure(Exception e) {            }        });    }}

• • DetailsAddPresenter

// 加入购物车public class DetailsAddPresenter {    private IDetailsListener iMainListener;    private DetailsAddService addCartService;    public DetailsAddPresenter(IDetailsListener iMainListener) {        this.iMainListener = iMainListener;        addCartService = new DetailsAddModel();    }    public void dettach() {        iMainListener = null;    }    public void addCart() {        Map params = new HashMap<>();        params.put("pid", "71");        params.put("uid", "39");        addCartService.addCart(params, new OnNetListener() {            @Override            public void onSuccess(DetailsAddBean addCartBean) {                if (iMainListener != null) {                    iMainListener.show(addCartBean.getCode().equals("0") ? "添加成功了" : "添加失败了");                }            }            @Override            public void onFailure(Exception e) {            }        });    }

model层

• DetailsAddService

public interface DetailsAddService {    void addCart(Map params, OnNetListener onNetListener);}

• DetailsAddModel

public class DetailsAddModel implements DetailsAddService {    private Handler handler = new Handler(Looper.getMainLooper());    @Override    public void addCart(Map params, final OnNetListener onNetListener) {        OkHttpUtils.getOkHttpUtils().doPost(Api.str1, params, new Callback() {            @Override            public void onFailure(Call call, IOException e) {            }            @Override            public void onResponse(Call call, Response response) throws IOException {                String string = response.body().string();                final DetailsAddBean addCartBean = new Gson().fromJson(string, DetailsAddBean.class);                handler.post(new Runnable() {                    @Override                    public void run() {                        onNetListener.onSuccess(addCartBean);                    }                });            }        });    }

• DetailsService

public interface DetailsService {    void getProductDetail(Map params, OnNetListener onNetListener);}

• DetailsModel

public class DetailsModel implements DetailsService {    private Handler handler = new Handler(Looper.getMainLooper());    @Override    public void getProductDetail(Map params, final OnNetListener onNetListener) {        OkHttpUtils.getOkHttpUtils().doPost(Api.str1, params, new Callback() {            @Override            public void onFailure(Call call, IOException e) {            }            @Override            public void onResponse(Call call, Response response) throws IOException {                String string = response.body().string();                final DetailsShopBean detailsBean = new Gson().fromJson(string, DetailsShopBean.class);                handler.post(new Runnable() {                    @Override                    public void run() {                        onNetListener.onSuccess(detailsBean);                    }                });            }        });    }}

bean包

• DetailsAddBean

public class DetailsAddBean {    private String msg;    private String code;    public String getMsg() {        return msg;    }    public void setMsg(String msg) {        this.msg = msg;    }    public String getCode() {        return code;    }    public void setCode(String code) {        this.code = code;    }}

• DetailsShopBean

public class DetailsShopBean {    private String msg;    private SellerBean seller;    private String code;    private DataBean data;    public String getMsg() {        return msg;    }    public void setMsg(String msg) {        this.msg = msg;    }    public SellerBean getSeller() {        return seller;    }    public void setSeller(SellerBean seller) {        this.seller = seller;    }    public String getCode() {        return code;    }    public void setCode(String code) {        this.code = code;    }    public DataBean getData() {        return data;    }    public void setData(DataBean data) {        this.data = data;    }    public static class SellerBean {        private String description;        private String icon;        private String name;        private int productNums;        private double score;        private int sellerid;        public String getDescription() {            return description;        }        public void setDescription(String description) {            this.description = description;        }        public String getIcon() {            return icon;        }        public void setIcon(String icon) {            this.icon = icon;        }        public String getName() {            return name;        }        public void setName(String name) {            this.name = name;        }        public int getProductNums() {            return productNums;        }        public void setProductNums(int productNums) {            this.productNums = productNums;        }        public double getScore() {            return score;        }        public void setScore(double score) {            this.score = score;        }        public int getSellerid() {            return sellerid;        }        public void setSellerid(int sellerid) {            this.sellerid = sellerid;        }    }    public static class DataBean {        private double bargainPrice;        private String createtime;        private String detailUrl;        private String images;        private int itemtype;        private int pid;        private double price;        private int pscid;        private int salenum;        private int sellerid;        private String subhead;        private String title;        public double getBargainPrice() {            return bargainPrice;        }        public void setBargainPrice(double bargainPrice) {            this.bargainPrice = bargainPrice;        }        public String getCreatetime() {            return createtime;        }        public void setCreatetime(String createtime) {            this.createtime = createtime;        }        public String getDetailUrl() {            return detailUrl;        }        public void setDetailUrl(String detailUrl) {            this.detailUrl = detailUrl;        }        public String getImages() {            return images;        }        public void setImages(String images) {            this.images = images;        }        public int getItemtype() {            return itemtype;        }        public void setItemtype(int itemtype) {            this.itemtype = itemtype;        }        public int getPid() {            return pid;        }        public void setPid(int pid) {            this.pid = pid;        }        public double getPrice() {            return price;        }        public void setPrice(double price) {            this.price = price;        }        public int getPscid() {            return pscid;        }        public void setPscid(int pscid) {            this.pscid = pscid;        }        public int getSalenum() {            return salenum;        }        public void setSalenum(int salenum) {            this.salenum = salenum;        }        public int getSellerid() {            return sellerid;        }        public void setSellerid(int sellerid) {            this.sellerid = sellerid;        }        public String getSubhead() {            return subhead;        }        public void setSubhead(String subhead) {            this.subhead = subhead;        }        public String getTitle() {            return title;        }        public void setTitle(String title) {            this.title = title;        }    }

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