防京东列表+布局切换

所需依赖

    /*banner轮播图 依赖*/
    implementation 'com.youth.banner:banner:1.4.9'
    /*gson解析*/
    implementation 'com.google.code.gson:gson:2.2.4'
    /*okhttp网络请求*/
    implementation 'com.squareup.okhttp3:okhttp:3.12.0'
    /*recyclerview展示*/
    implementation 'com.android.support:recyclerview-v7:28.0.0'
    /*xrecyclerview展示*/
    implementation 'com.jcodecraeer:xrecyclerview:1.2.0'
    /*glide图片工具*/
    implementation 'com.github.bumptech.glide:glide:4.8.0'

IVew

public interface IView {
    public Context context();
}

DataCall–继承IVew

public interface DataCall extends IView {
    void ShowSuccess(GoodsBean goodsBean);

    void ShowError(String error);
}

Model

public class GoodsModel {
    public void showGoods(int page, String name, final MainmodelCallback mainmodelCallback) {
        HttpUtils httpUtils = HttpUtils.getHttpUtils();
        String url = "http://www.zhaoapi.cn/product/searchProducts?keywords=" + name + "&page=" + page;
        httpUtils.doGet(url, new HttpUtils.IOKhttpUtilsCallback() {
            @Override
            public void onFailure(String error) {
                if (mainmodelCallback != null) {
                    mainmodelCallback.getFaid(error);
                }
            }

            @Override
            public void onResponse(String json) {
                GoodsBean goodsBean = new Gson().fromJson(json, GoodsBean.class);

                if (goodsBean.getCode().equals("0")) {
                    if (mainmodelCallback != null) {
                        mainmodelCallback.getSuccess(goodsBean);
                    }
                } else {
                    if (mainmodelCallback != null) {
                        mainmodelCallback.getFaid("请求失败");
                    }
                }
            }
        });
    }

    public interface MainmodelCallback {
        void getSuccess(GoodsBean goodsBean);

        void getFaid(String error);
    }
}

HttpUtils

public class HttpUtils {
    public static HttpUtils httpUtils;
    private final Handler handler;
    private final OkHttpClient HttpClient;

    private HttpUtils() {
        //主线程Handler
        handler = new Handler(Looper.getMainLooper());
        HttpClient = new OkHttpClient.Builder()
                .readTimeout(5000, TimeUnit.MILLISECONDS)
                .writeTimeout(5000, TimeUnit.MILLISECONDS)
                .connectTimeout(5000, TimeUnit.MILLISECONDS)
                .connectionPool(new ConnectionPool(5, 1, TimeUnit.SECONDS))//内存溢出
                .build();
    }


    public static HttpUtils getHttpUtils() {
        if (httpUtils == null) {
            synchronized (HttpUtils.class) {
                if (httpUtils == null) {
                    return httpUtils = new HttpUtils();
                }
            }
        }
        return httpUtils;
    }

    //异步get
    public void doGet(String url, final IOKhttpUtilsCallback ioKhttpUtilsCallback) {
        Request request = new Request.Builder().get().url(url).build();
        Call call = HttpClient.newCall(request);
        call.enqueue(new Callback() {
            @Override
            public void onFailure(Call call, final IOException e) {
                if (ioKhttpUtilsCallback != null) {
                    handler.post(new Runnable() {
                        @Override
                        public void run() {
                            ioKhttpUtilsCallback.onFailure(e.getMessage());
                        }
                    });
                }
            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
                if (response != null && response.isSuccessful()) {
                    final String json = response.body().string();
                    if (ioKhttpUtilsCallback != null) {
                        //切换到主线程
                        handler.post(new Runnable() {
                            @Override
                            public void run() {
                                ioKhttpUtilsCallback.onResponse(json);
                            }
                        });
                    }


                } else {
                    if (ioKhttpUtilsCallback != null) {
                        //切换到主线程
                        handler.post(new Runnable() {
                            @Override
                            public void run() {
                                ioKhttpUtilsCallback.onFailure("网络异常");
                            }
                        });
                    }
                }
            }
        });

    }
    //异步post
    public void doPost(String url, Map<String, String> map, final IOKhttpUtilsCallback ioKhttpUtilsCallback) {
        FormBody.Builder builder = new FormBody.Builder();
        for (Map.Entry<String, String> entry : map.entrySet()) {
            builder.add(entry.getKey(), entry.getValue());
        }
        FormBody formBody = builder.build();
        Request request = new Request.Builder()
                .post(formBody)
                .url(url)
                .build();
        Call call = HttpClient.newCall(request);
        call.enqueue(new Callback() {
            @Override
            public void onFailure(Call call, final IOException e) {
                if (ioKhttpUtilsCallback != null) {
                    //切换到主线程
                    handler.post(new Runnable() {
                        @Override
                        public void run() {
                            ioKhttpUtilsCallback.onFailure(e.getMessage());
                        }
                    });
                }
            }


            @Override
            public void onResponse(Call call, Response response) throws IOException {
                if (response != null && response.isSuccessful()) {
                    final String json = response.body().string();
                    if (ioKhttpUtilsCallback != null) {
                        //切换到主线程
                        handler.post(new Runnable() {
                            @Override
                            public void run() {
                                ioKhttpUtilsCallback.onResponse(json);
                            }
                        });
                    }


                } else {
                    if (ioKhttpUtilsCallback != null) {
                        //切换到主线程
                        handler.post(new Runnable() {
                            @Override
                            public void run() {
                                ioKhttpUtilsCallback.onFailure("网络异常");
                            }
                        });
                    }
                }
            }
        });
    }

    //接口回调
    public interface IOKhttpUtilsCallback {
        void onFailure(String error);

        void onResponse(String json);
    }
}

BasePresenter

public abstract class BasePresenter<V extends IView> {
    protected V view;

    public BasePresenter(V view) {
        this.view = view;
        initModel();
    }
    protected abstract void initModel();
    public void onDestroy() {
        view = null;
    }
}

Presenter

public class GoodsPresenter extends BasePresenter<DataCall> {


    private GoodsModel goodsModel;

    public GoodsPresenter(DataCall view) {
        super(view);

    }

    @Override
    protected void initModel() {
        goodsModel = new GoodsModel();
    }

    public void showGoods(int page, String name) {
        goodsModel.showGoods(page, name, new GoodsModel.MainmodelCallback() {
            @Override
            public void getSuccess(GoodsBean goodsBean) {
                view.ShowSuccess(goodsBean);
            }

            @Override
            public void getFaid(String error) {
                view.ShowError(error);
            }
        });
    }
}

Activity

public class MainActivity extends AppCompatActivity implements View.OnClickListener, DataCall {

    private ImageView mBtnBack;
    private ImageView mBtnMenu;
    private XRecyclerView mXrecy;
    private int type = 1;
    private GoodsAdapter adapter;
    private SearchView mSea;
    private GoodsPresenter presenter;
    private List<GoodsBean.DataBean> list;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //初始化控件
        initView();
        //数据获取
        initData();
        //刷新加载
        initRefresh();
        mSea = (SearchView) findViewById(R.id.sea);
        mSea.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
            @Override
            public boolean onQueryTextSubmit(String s) {

                return false;
            }

            @Override
            public boolean onQueryTextChange(String s) {
                presenter.showGoods(1, s);
                return false;
            }
        });

    }

    private void initRefresh() {
        mXrecy.setLoadingListener(new XRecyclerView.LoadingListener() {
            @Override
            public void onRefresh() {
                //更新UI
                new Handler().postDelayed(new Runnable() {
                    @Override
                    public void run() {
                        mXrecy.refreshComplete();
                        Toast.makeText(MainActivity.this, "刷新完成", Toast.LENGTH_SHORT).show();
                    }
                }, 2000);
            }

            @Override
            public void onLoadMore() {
                //更新UI
                new Handler().postDelayed(new Runnable() {
                    @Override
                    public void run() {
                        mXrecy.loadMoreComplete();
                        Toast.makeText(MainActivity.this, "加载完成", Toast.LENGTH_SHORT).show();
                    }
                }, 2000);
            }
        });
    }

    private void initData() {
        presenter = new GoodsPresenter(this);
        presenter.showGoods(1, "笔记本");
        mBtnMenu.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (type == 1) {
                    LinearLayoutManager linearLayoutManager = new LinearLayoutManager(MainActivity.this);
                    linearLayoutManager.setOrientation(LinearLayoutManager.VERTICAL);
                    mXrecy.setLayoutManager(linearLayoutManager);
                    adapter.notifyDataSetChanged();
                    type = 2;
                } else {
                    GridLayoutManager gridLayoutManager = new GridLayoutManager(MainActivity.this, 2);
                    mXrecy.setLayoutManager(gridLayoutManager);
                    adapter.notifyDataSetChanged();
                    type = 1;
                }
            }
        });
    }

    private void initView() {
        mBtnBack = (ImageView) findViewById(R.id.btn_back);
        mBtnMenu = (ImageView) findViewById(R.id.btn_menu);
        mBtnMenu.setOnClickListener(this);
        mXrecy = (XRecyclerView) findViewById(R.id.xrecy);

    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            default:
                break;
            case R.id.btn_menu:
                break;
        }
    }

    @Override
    public void ShowSuccess(GoodsBean goodsBean) {
        Toast.makeText(this, "成功——————" + goodsBean.getData(), Toast.LENGTH_SHORT).show();
        list = goodsBean.getData();
        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(MainActivity.this);
        linearLayoutManager.setOrientation(LinearLayoutManager.VERTICAL);
        mXrecy.setLayoutManager(linearLayoutManager);
        adapter = new GoodsAdapter(list, context());
        mXrecy.setAdapter(adapter);

        adapter.setOnItemLongClickListener(new GoodsAdapter.OnItemLongClickListener() {
            @Override
            public void OnItemLongClick(View view, int position) {
                ObjectAnimator alpha = ObjectAnimator.ofFloat(view, "alpha", 1f, 0f, 1f);
                alpha.setDuration(5000);
                alpha.start();
                AlertDialog.Builder builder = new AlertDialog.Builder(context());
                builder.setTitle("删除");
                builder.setMessage("确认删除吗");
                builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {
                        list.remove(i);
                        adapter.notifyDataSetChanged();
                    }
                });
                builder.setNegativeButton("取消", null);
                builder.show();
            }
        });
    }

    @Override
    public void ShowError(String error) {
        Toast.makeText(this, "失败——————" + error, Toast.LENGTH_SHORT).show();
    }

    @Override
    public Context context() {
        return this;
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        presenter.onDestroy();
    }
}

Adapter

public class GoodsAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
    private List<GoodsBean.DataBean> list;
    private Context context;

    public GoodsAdapter(List<GoodsBean.DataBean> list, Context context) {
        this.list = list;
        this.context = context;
    }

    @NonNull
    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
        View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.itemlayout, viewGroup, false);
        return (new ViewHolder(view));
    }

    @Override
    public void onBindViewHolder(@NonNull RecyclerView.ViewHolder viewHolder, final int position) {

        ((ViewHolder) viewHolder).item_dec.setText(list.get(position).getTitle());
        ((ViewHolder) viewHolder).item_price.setText(list.get(position).getPrice() + "");
        String images = list.get(position).getImages();
        String imageurl = "http" + images.substring(5);

        String[] split = imageurl.split("\\|");
        if (split.length > 0) {
            Glide.with(context).load(split[0]).into(((ViewHolder) viewHolder).item_img);
            //   Glide.with(context).load(ii).into(((ViewHolder) viewHolder).item_img);
        }
        viewHolder.itemView.setOnLongClickListener(new View.OnLongClickListener() {
            @Override
            public boolean onLongClick(View view) {
                ObjectAnimator alpha = ObjectAnimator.ofFloat(view, "alpha", 1f, 0f, 1f);
                alpha.setDuration(5000);
                alpha.start();
                AlertDialog.Builder builder = new AlertDialog.Builder(context);
                builder.setTitle("删除");
                builder.setMessage("确认删除吗");
                builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {
                        list.remove(position);
                        notifyDataSetChanged();
                    }
                });
                builder.setNegativeButton("取消", null);
                builder.show();
                return true;
            }
        });
        viewHolder.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent(context, DataActivity.class);
                intent.putExtra("aaa", list.get(position).getTitle());
                intent.putExtra("bbb", list.get(position).getBargainPrice());
                intent.putExtra("ccc", list.get(position).getCreatetime());
                intent.putExtra("eee", list.get(position).getImages());
                context.startActivity(intent);
                Toast.makeText(context, "点击了" + position, Toast.LENGTH_LONG).show();
            }
        });
    }

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

    public class ViewHolder extends RecyclerView.ViewHolder {
        private TextView item_dec, item_price;
        private ImageView item_img;

        public ViewHolder(View itemView) {
            super(itemView);
            item_img = itemView.findViewById(R.id.img_icon);
            item_dec = itemView.findViewById(R.id.txt_name);
            item_price = itemView.findViewById(R.id.txt_price);
        }
    }

    private OnItemLongClickListener onItemLongClickListener;

    public void setOnItemLongClickListener(OnItemLongClickListener onItemLongClickListener) {
        this.onItemLongClickListener = onItemLongClickListener;
    }

    public interface OnItemLongClickListener {
        void OnItemLongClick(View view, int position);
    }
}

布局****

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal" android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <ImageView
        android:id="@+id/img_icon"
        android:layout_width="120dp"
        android:layout_height="120dp" />
    <LinearLayout
        android:orientation="vertical"
        android:layout_width="match_parent"
        android:layout_height="120dp">
        <TextView
            android:id="@+id/txt_name"
            android:text="详情"
            android:textSize="20dp"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
        <TextView
            android:id="@+id/txt_price"
            android:text="价格"
            android:textSize="25dp"
            android:textColor="#f00"
            android:layout_marginTop="5dp"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
    </LinearLayout>

</LinearLayout>