仿京东分类+MVP

首先用到的依赖有

	 //okgo
    implementation 'com.lzy.net:okgo:3.0.4'
    implementation 'org.kie.modules:com-google-code-gson:6.5.0.Final'
    //butterknife快速查找资源的依赖
    implementation 'com.jakewharton:butterknife:8.8.1'
    annotationProcessor 'com.jakewharton:butterknife-compiler:8.8.1'
    //Brvah：RecyclerView快速开发框架
    implementation 'com.github.CymChad:BaseRecyclerViewAdapterHelper:2.9.30'
    ///glide图片加载框架
    implementation 'com.github.bumptech.glide:glide:4.8.0'
    annotationProcessor 'com.github.bumptech.glide:compiler:4.8.0'

brvah使用需要在最外的gradle里面写入

allprojects {
    repositories {
        google()
        jcenter()
        maven { url "https://jitpack.io" }
    }
}

清单文件下的网络权限

 <uses-permission android:name="android.permission.INTERNET"/>

下面开始写布局

主布局

<android.support.v7.widget.RecyclerView
        android:id="@+id/fl_recyle"
        android:layout_width="0dp"
        android:layout_weight="3"
        android:layout_height="wrap_content">
    </android.support.v7.widget.RecyclerView>

    <android.support.v7.widget.RecyclerView
        android:id="@+id/xq_recyle"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="7"
        >
    </android.support.v7.widget.RecyclerView>

分类的xml

 <TextView
        android:id="@+id/recy_text"
        android:layout_margin="5dp"
        android:textSize="18sp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textStyle="bold"
        />

右侧的条目的xml

 <TextView
        android:id="@+id/busimnss_text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="商家"
        />
    <android.support.v7.widget.RecyclerView
        android:id="@+id/busimnss_recyle"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
    </android.support.v7.widget.RecyclerView>

商家的条目信息

  <ImageView
        android:id="@+id/goods_img"
        android:layout_width="80dp"
        android:layout_height="80dp"
        android:background="@mipmap/ic_launcher"
        />
    <TextView
        android:id="@+id/goods_text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="商品1"
        />

契约类

public interface IContant {
    //V层
    public interface IView {
        //展示详情数据
        public void flshowData(String fl);
        //详情
        public void xqshowData(String xq);

    }

    //P层
    public interface IPresenter<IView> {
        //绑定
        public void attachView(IView iView);
        //解绑
        public void detachView(IView iView);
        //分类
        public void flrequest();
        //详情
        public void xqrequest(int cid);
    }

    //M层
    public interface IModel {
        //分类
        public void flresquest(OnCallBack oncallback);
        //请求详情数据
        public void xqresponse(int cid, OnCallBack callback);
        //回调
        public interface OnCallBack {
            public void onCallBack(String fl);
        }
    }
}

P层

public class IPersenter implements IContant.IPresenter<IContant.IView> {

    private IModel iModel;
    private SoftReference<IModel> reference;
    IContant.IView iView;
    @Override
    public void attachView(IContant.IView iView) {
        this.iView =iView;
        iModel = new IModel();
        reference = new SoftReference<>(iModel);
    }
    @Override
    public void detachView(IContant.IView iView) {
        reference.clear();
    }
    //分类的P
    @Override
    public void flrequest() {
        iModel.flresquest(new IContant.IModel.OnCallBack() {
            @Override
            public void onCallBack(String fl) {
                iView.flshowData(fl);
            }
        });
    }
    //详情的P层
    @Override
    public void xqrequest(int cid) {
        iModel.xqresponse(cid,new IContant.IModel.OnCallBack() {
            @Override
            public void onCallBack(String xq) {
                iView.xqshowData(xq);
            }
        });
    }
}

M层

public class IModel implements IContant.IModel {
    @Override
    public void flresquest(final OnCallBack oncallback) {
        OkGo.<String>get(Conters.FLINTER_URL).execute(new StringCallback() {
            @Override
            public void onSuccess(Response<String> response) {
                String fl = response.body().toString();
                Log.i("yyy", "onSuccess: "+fl);
                oncallback.onCallBack(fl);
            }
        });
    }

    @Override
    public void xqresponse(int cid, final OnCallBack callback) {
        OkGo.<String>get(Conters.XQINTER_URL).execute(new StringCallback() {
            @Override
            public void onSuccess(Response<String> response) {
                String xq = response.body().toString();
                Log.i("yyy", "onSuccess: "+xq);
                callback.onCallBack(xq);
            }
        });
    }
}

activity界面

public class HomeActivity extends AppCompatActivity implements IContant.IView {


    @BindView(R.id.xq_recyle)
    RecyclerView xqRecyle;
    @BindView(R.id.fl_recyle)
    RecyclerView flRecyle;
    private IPersenter iPersenter;
    private ListAdapter adapter;
    private List<FlBean.DataBean> data;
    private FlAdapter adapter1;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_home);
        ButterKnife.bind(this);
        //P层
        iPersenter = new IPersenter();
        iPersenter.attachView(this);
        iPersenter.flrequest();
    }

    //分类的列表
    @Override
    public void flshowData(String fl) {
        //gson解析
        Gson gson = new Gson();
        FlBean flBean = gson.fromJson(fl, FlBean.class);
        data = flBean.getData();
        //布局管理器
        LinearLayoutManager manager = new LinearLayoutManager(HomeActivity.this, LinearLayoutManager.VERTICAL, false);
        flRecyle.setLayoutManager(manager);
        //显示子条目
        adapter1 = new FlAdapter(R.layout.fllist_item,data);
        flRecyle.setAdapter(adapter1);
        //点击触发而获取id
        adapter1.setOnItemClickListener(new BaseQuickAdapter.OnItemClickListener() {
            @Override
            public void onItemClick(BaseQuickAdapter adapter, View view, int position) {
                int cid = data.get(position).getCid();
                iPersenter.xqrequest(cid);
            }
        });
    }
    //详情的回传数据
    @Override
    public void xqshowData(String xq) {
        //Gson解析
        Gson gson = new Gson();
        XqBean xqBean = gson.fromJson(xq, XqBean.class);
        List<XqBean.DataBean> data = xqBean.getData();
        //布局管理器
        LinearLayoutManager manager = new LinearLayoutManager(HomeActivity.this);
        xqRecyle.setLayoutManager(manager);
        //recyleview的适配器
        RecyAdapter adapter = new RecyAdapter(R.layout.business_item, data);
        xqRecyle.setAdapter(adapter);
    }
    //避免内存泄漏
    @Override
    protected void onDestroy() {
        super.onDestroy();
        iPersenter.detachView(this);
    }
}

左侧条目的适配器

public class FlAdapter extends BaseQuickAdapter<FlBean.DataBean,BaseViewHolder> {
    public FlAdapter(int layoutResId, @Nullable List<FlBean.DataBean> data) {
        super(layoutResId, data);
    }

    @Override
    protected void convert(BaseViewHolder helper, FlBean.DataBean item) {
    //利用helper获取id
        helper.setText(R.id.recy_text,item.getName());
    }
}

商家的条目

public class RecyAdapter extends BaseQuickAdapter<XqBean.DataBean,BaseViewHolder> {

    public RecyAdapter(int layoutResId, @Nullable List<XqBean.DataBean> data) {
        super(layoutResId, data);
    }

    @Override
    protected void convert(BaseViewHolder helper, XqBean.DataBean item) {
        //获取id
        helper.setText(R.id.busimnss_text, item.getName());
        //获取商家的recyleView
        RecyclerView goods_text = helper.getView(R.id.busimnss_recyle);
        List<XqBean.DataBean.ListBean> list = item.getList();
        //布局管理器
        GridLayoutManager gridLayoutManager = new GridLayoutManager(mContext, 3, GridLayoutManager.VERTICAL, false);
        goods_text.setLayoutManager(gridLayoutManager);
        //条目详情的adapter
        GoodsAdapter adapter = new GoodsAdapter(R.layout.goods_item,list);
        goods_text.setAdapter(adapter);
    }
}

商家里面的详情

public class GoodsAdapter extends BaseQuickAdapter<XqBean.DataBean.ListBean,BaseViewHolder> {

    public GoodsAdapter(int layoutResId, @Nullable List<XqBean.DataBean.ListBean> data) {
        super(layoutResId, data);
    }

    @Override
    protected void convert(BaseViewHolder helper, XqBean.DataBean.ListBean item) {
        helper.setText(R.id.goods_text,item.getName());
        ImageView imageView = helper.getView(R.id.goods_img);
        Glide.with(mContext).load(item.getIcon()).into(imageView);
    }
}