MVP+加二级列表

重要的事情说三遍

加权限加权限加权限

dependencies {
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    implementation 'com.android.support:appcompat-v7:28.0.0-alpha3'
    implementation 'com.android.support.constraint:constraint-layout:1.1.2'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
   //  xrecyclerview下拉刷新上拉加载依赖包
    implementation('com.jcodecraeer:xrecyclerview:1.5.9') {
        exclude group: 'com.android.support'
    }
  //recyclerview依赖包
    implementation 'com.android.support:recyclerview-v7:28.0.0-alpha3'
  //okhttp网络请求依赖包
    implementation 'com.squareup.okhttp3:okhttp:3.11.0'
  //ImageLoader请求图片依赖包
    implementation files('libs/universal-image-loader-1.9.5.jar')
  //Gson解析依赖包
    implementation 'com.google.code.gson:gson:2.2.4'
}

第一步okhttp网络请求封装

public class OkhttpUtils {

      public static OkhttpUtils httpUtils;
          public static OkHttpClient client;
          public static Handler handler = new Handler();



          public OkhttpUtils() {

              client= new OkHttpClient.Builder().build();

          }
          public static OkHttpClient getclient(){
              return client;
          }

          public static Handler getHandler() {
              return handler;
          }



          //赖汉师
          public static OkhttpUtils getInstance(){

              if(httpUtils==null){
                  synchronized (OkhttpUtils.class){
                      if(httpUtils==null){
                          httpUtils= new OkhttpUtils();
                      }
                  }

              }
              return httpUtils;
          }

          //get异步网络请求
          public void get(String url, Callback callback){

              Request build = new Request.Builder().url(url).build();

              Call call = getclient().newCall(build);


              call.enqueue(callback);
          }
}

-----------------------------------------------------------------------------------------------------------------------------------------------

public abstract class OkhttpBack implements Callback{


       //okhttpback
        public abstract void success(String json);

        /**
         * 失败
         * @param json
         */
        public abstract void failed(String json);

        @Override
        public void onFailure(Call call, final IOException e) {

            OkhttpUtils.getHandler().post(new Runnable() {
                @Override
                public void run() {
                    failed(e.getMessage());

                }
            });

        }

        @Override
        public void onResponse(Call call, final Response response) throws IOException {

            final String string = response.body().string();
            OkhttpUtils.getHandler().post(new Runnable() {
                @Override
                public void run() {
                    success(string);

                }
            });

        }
}

----------------------------------------------------------------------------------------------------------------------------

ImageLoader封装

public class Myapplication extends Application {

    //APP
        @Override
        public void onCreate() {
            super.onCreate();


            String file= Environment.getExternalStorageDirectory().getPath();
            File file1 = new File(file);
            //进行框架初使化操作-全局配置
            ImageLoaderConfiguration configuration=new ImageLoaderConfiguration.Builder(this)
                    .memoryCacheExtraOptions(480, 800)//缓存图片最大的长和宽
                    .threadPoolSize(2)//线程池的数量
                    .threadPriority(4)
                    .memoryCacheSize(5*1024*1024)//设置内存缓存区大小
                    .diskCacheSize(20*1024*1024)//设置sd卡缓存区大小
                    .diskCache(new UnlimitedDiskCache(file1))//自定义磁盘缓存目录
                    .writeDebugLogs()//打印日志内容
                    .diskCacheFileNameGenerator(new Md5FileNameGenerator())//给缓存的文件名进行md5加密处理
                    .build();

            ImageLoader.getInstance().init(configuration);

        }

        public static DisplayImageOptions getoptions(){


            DisplayImageOptions options=new DisplayImageOptions.Builder()
                    .cacheInMemory(true)//使用内存缓存
                    .cacheOnDisk(true)//使用磁盘缓存
                    .showImageOnLoading(R.mipmap.ic_launcher)//设置正在下载的图片
                    .showImageForEmptyUri(R.mipmap.ic_launcher)//url为空或请求的资源不存在时
                    .showImageOnFail(R.mipmap.ic_launcher)//下载失败时显示的图片
                    .bitmapConfig(Bitmap.Config.RGB_565)//设置图片格式
                   //.displayer(new RoundedBitmapDisplayer(300))//设置圆角图片
                    .build();



            return options;
        }

}

----------------------------------------------------------------------------------------------------------------------

MVP框架

 

M层

返回的接口

public interface IShowBack { //成功 void success(ShowBean showBean); //失败 void failed(String msg); }

请求网络的接口

public interface IShowTask {

    void getList(String url,IShowBack iShowBack);
}

请求网络

public class ShowTask implements IShowTask{
    @Override
    public void getList(String url, final IShowBack iShowBack) {
        OkhttpUtils.getInstance().get(url, new OkhttpBack() {
            @Override
            public void success(String json) {
                Gson gson = new Gson();
                ShowBean bean = gson.fromJson(json, ShowBean.class);
                Log.i("TAG",json);
                iShowBack.success(bean);
            }

            @Override
            public void failed(String json) {

                iShowBack.failed("sssss");
            }
        });
    }
}

V层

返回数据的接口

public interface IShowView {
    void getDataList(ShowBean showBean);
}

P层

P层的接口

public interface IPresenter {

    void getData(String name,int page);
}

P层调用的方法

public class Presenter implements IPresenter,IShowBack{

    //M层
    IShowTask iShowTask;
    //V层
    IShowView iShowView;
    private String encode;

    public Presenter(MainActivity activity) {
        //实例化ishowtask
        iShowTask = new ShowTask();
        iShowView =activity;

    }

    @Override
    public void success(ShowBean showBean) {
iShowView.getDataList(showBean);
    }

    @Override
    public void failed(String msg) {

    }


    @Override
    public void getData(String name, int page) {
        try {
            encode = URLEncoder.encode(name, "UTF-8");
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        iShowTask.getList("http://www.zhaoapi.cn/product/searchProducts?keywords="+encode+"&"+page+"&sort=0",this);
    }
}

--------------------------------------------------

 

-----------------------------------------------------------------------------------------------------------------------------------------

Recycler适配器

public class RecyclerAdapter extends RecyclerView.Adapter<RecyclerAdapter.reviewholder> {

    private Context context;
    private List<ShowBean.DataBean>list;
    private onItemListen onItemListen;

    public RecyclerAdapter(Context context) {
        this.context = context;
        list= new ArrayList<>();
    }
    public void addData(List<ShowBean.DataBean> dataBeans){
        list.addAll(dataBeans);
        notifyDataSetChanged();
    }
    public void cleanData(List<ShowBean.DataBean> dataBeans){
        list.clear();
        list.addAll(dataBeans);
        notifyDataSetChanged();
    }

    @NonNull
    @Override
    public reviewholder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
        return new reviewholder(LayoutInflater.from(context).inflate(R.layout.recyclerbase,null));
    }

    @Override
    public void onBindViewHolder(@NonNull reviewholder reviewholder, int i) {
        reviewholder.text1.setText(list.get(i).getTitle());

        ImageLoader.getInstance().displayImage((list.get(i).getImages()).split("\\|")[0],reviewholder.image, Myapplication.getoptions());

        final String detailUrl = list.get(i).getDetailUrl();
        final int pid = list.get(i).getPid();
        reviewholder.image.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                onItemListen.getonItem(detailUrl,pid);
            }
        });


    }

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

    class reviewholder extends RecyclerView.ViewHolder{

        TextView text1;
        ImageView image;
        public reviewholder(@NonNull View itemView) {
            super(itemView);
            text1= itemView.findViewById(R.id.text1);
            image = itemView.findViewById(R.id.image);
        }
    }

    public  void setonItemList(RecyclerAdapter.onItemListen onItemListen) {
        this.onItemListen = onItemListen;
    }

    public interface onItemListen{
        void getonItem(String detailUrl,int pid);
    }
}

--------------------------------------------------------------------------------------------------------------------------

MainActivity

public class MainActivity extends AppCompatActivity implements IShowView{

    private Presenter presenter;
    private XRecyclerView xrecycler;
    private RecyclerAdapter adapter;
    private EditText edittext;
    private TextView text;
    private int page;
    private String name="手机";


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //实例化presenter
        presenter =new Presenter(this);
       // presenter.getData(name,page);
        edittext= findViewById(R.id.edittext);

        getinto();
        text= findViewById(R.id.text);
        text.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                name= edittext.getText().toString();
                presenter.getData(name,page);
            }
        });





    }

    private void getinto() {
        //获取资源ID
        xrecycler= findViewById(R.id.xrecycler);
        xrecycler.setLoadingMoreEnabled(true);
        xrecycler.setPullRefreshEnabled(true);
        xrecycler.setLoadingListener(new XRecyclerView.LoadingListener() {
            @Override
            public void onRefresh() {
                page=1;
               presenter.getData(name,page);
               xrecycler.refreshComplete();

            }

            @Override
            public void onLoadMore() {
                page++;
                presenter.getData(name,page);
                xrecycler.loadMoreComplete();

            }
        });
        adapter = new RecyclerAdapter(this);
        xrecycler.setLayoutManager(new LinearLayoutManager(this));
        xrecycler.addItemDecoration(new DividerItemDecoration(this,DividerItemDecoration.VERTICAL));
        xrecycler.setAdapter(adapter);

    }

    @Override
    public void getDataList(ShowBean showBean) {
        List<ShowBean.DataBean> data = showBean.getData();
        Log.i("TAG",data+"");
        if(page==0){
            adapter.cleanData(data);
        }else {
            adapter.addData(data);
        }
        adapter.setonItemList(new RecyclerAdapter.onItemListen() {
            @Override
            public void getonItem(String detailUrl,int pid) {

                Intent intent = new Intent(MainActivity.this, ShowActivity.class);
                intent.putExtra("s",detailUrl);
                startActivity(intent);
            }
        });

    }
}

----------------------------------------------------------------------------------------------------------------------

获取Webview

public class ShowActivity extends AppCompatActivity {

    private WebView webview;
    private Button button;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_show);
        //获取资源ID
        webview =findViewById(R.id.webview);
        String ss = getIntent().getStringExtra("s");
        webview.loadUrl(ss);

        button= findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent(ShowActivity.this, CarActivity.class);
                startActivity(intent);
            }
        });
    }
}

--------------------------------------------------------------------------------------

创建二级列表的适配器

public class ExpandableAdapter extends BaseExpandableListAdapter {

    private Context context;
    private List<CarBean.DataBean> list;

    public ExpandableAdapter(Context context) {
        this.context = context;
        this.list = new ArrayList<>();
    }
    public void addData(List<CarBean.DataBean>dataBeans){
        list.addAll(dataBeans);
        notifyDataSetChanged();
    }

    public void expandGrou(ExpandableListView listView){
        for (int i=0;i<getGroupCount();i++){
              listView.expandGroup(i);
        }
    }

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

    @Override
    public int getChildrenCount(int i) {
        return list.get(i).getList().size();
    }

    @Override
    public CarBean.DataBean getGroup(int i) {
        return list.get(i);
    }

    @Override
    public CarBean.DataBean.ListBean getChild(int i, int i1) {
        return list.get(i).getList().get(i1);
    }

    @Override
    public long getGroupId(int i) {
        CarBean.DataBean group = getGroup(i);
        return group.getId();
    }

    @Override
    public long getChildId(int i, int i1) {
        CarBean.DataBean.ListBean child = getChild(i, i1);
        return child.getSellerid();
    }

    @Override
    public boolean hasStableIds() {
        return false;
    }

    @Override
    public View getGroupView(int i, boolean b, View view, ViewGroup viewGroup) {

        oneciewholder holder;
        if(view==null){
            view= View.inflate(context,R.layout.oneexpandable,null);
            holder= new oneciewholder();
            holder.car_text1=view.findViewById(R.id.car_text1);
            view.setTag(holder);

        }else{
            holder = (oneciewholder) view.getTag();
        }
        holder.car_text1.setText(list.get(i).getSellerName());

        return view;
    }

    @Override
    public View getChildView(int i, int i1, boolean b, View view, ViewGroup viewGroup) {


        twoviewholder holder;
        if(view==null){
            view= View.inflate(context,R.layout.twoexpandable,null);
            holder= new twoviewholder();
            holder.car_text2= view.findViewById(R.id.car_text2);
            holder.car_image= view.findViewById(R.id.car_image);
            view.setTag(holder);

        }else{
            holder= (twoviewholder) view.getTag();
        }

        holder.car_text2.setText(list.get(i).getList().get(i1).getTitle());
        ImageLoader.getInstance().displayImage((list.get(i).getList().get(i1).getImages()).split("\\|")[0],holder.car_image, Myapplication.getoptions());
        return view;
    }

    @Override
    public boolean isChildSelectable(int i, int i1) {
        return false;
    }

    class oneciewholder{

        TextView car_text1;


    }
    class twoviewholder{
        TextView car_text2;
        ImageView car_image;

    }

------------------------------------------------------------------------------------------------

展示二级列表

public class CarActivity extends AppCompatActivity {

    private ExpandableListView expandable;
    private List<CarBean.DataBean> data;
    ExpandableAdapter expandableAdapter;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_car);
        //获取资源ID
        expandable= findViewById(R.id.expandable);

        getData();



    }

    private void getData() {
        OkhttpUtils.getInstance().get("https://www.zhaoapi.cn/product/getCarts?uid=4243&token=94A2C256471982A75C170CAB844FE4FE", new OkhttpBack() {
            @Override
            public void success(String json) {
                Log.i("TAG",json);
                Gson gson = new Gson();
                CarBean carBean = gson.fromJson(json, CarBean.class);
                data = carBean.getData();

                expandableAdapter   = new ExpandableAdapter(CarActivity.this);
                expandable.setAdapter(expandableAdapter);
                expandableAdapter.addData(data);
                expandableAdapter.expandGrou(expandable);


            }

            @Override
            public void failed(String json) {

            }
        });
    }
}