电商项目

首先说一下需要导入的依赖

注意 : 我这里使用的是androidx

分别是Gson依赖,tablayout依赖,recycleView依赖 等

//frseo
implementation 'com.facebook.fresco:fresco:2.3.0'implementation 'androidx.recyclerview:recyclerview:1.1.0'  //RecyclerViewimplementation 'com.jakewharton:butterknife:10.2.3'  //butterknifeannotationProcessor 'com.jakewharton:butterknife-compiler:10.2.3'implementation("com.squareup.okhttp3:okhttp:4.8.1") //okhttp
implementation("com.squareup.okhttp3:logging-interceptor:4.8.1") //日志拦截依赖implementation 'com.squareup.retrofit2:retrofit:2.6.0'   //retrofit
implementation 'com.squareup.retrofit2:adapter-rxjava2:2.3.0'  //rxjava
implementation 'com.squareup.retrofit2:converter-gson:2.1.0'   //gson 转换
implementation 'io.reactivex.rxjava2:rxandroid:2.0.1'  //rxandroid implementation 'org.greenrobot:eventbus:3.2.0' //EventBus//二维码继承
implementation 'cn.yipianfengye.android:zxing-library:2.2'//Gson添加依赖
implementation 'com.google.code.gson:gson:2.8.5'

接下来就是基类的抽取

IBaseView类只是一个接口
这是BaseIPresenter也就是Presenter的基类抽取

public class BasePresenter<V extends IBaseView> {public V mView;//绑定public void attachView(V view) {mView = view;}//解绑public void deatchView() {mView = null;}
}

这是BaseActivity也就是Activity的基类抽取(这里面我们不需要用这个来表示数据)

public abstract class BaseActivity

extends Activity implements IBaseView {

protected P presenter;@Override
protected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(layoutID());//初始化控件initView();//初始化presenterpresenter = initPresenter();//绑定控件presenter.attachView(this);//初始化数据initData();
}protected abstract void initData();protected abstract P initPresenter();protected abstract void initView();protected abstract int layoutID();
//解绑@Override
protected void onDestroy() {super.onDestroy();if (presenter != null) {presenter.deatchView();}
}

现在开始mvp的封装

首先是契约类

public interface IMainContract {interface IMainView extends IBaseView {void setData(String json);}interface IMainPresenter {void getHomeData();}
}

接着是mvp中的presenter层

public class MainPresenter extends BasePresenter<IMainContract.IMainView> implements IMainContract.IMainPresenter {private OkHttpUtils mOkHttpUtils;public MainPresenter() {mOkHttpUtils = OkHttpUtils.getInstance();}@Overridepublic void getHomeData() {mOkHttpUtils.doGet(Api.STUDIO_URL, new OkHttpUtils.OkHttpCallBack() {@Overridepublic void onResponse(String json) {mView.setData(json);}});}
}

从这里开始写工具类OkHttpUtils

public class OkHttpUtils {private final Handler mHandle;private final OkHttpClient mOkHttpClient;private OkHttpUtils() {HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor().setLevel(HttpLoggingInterceptor.Level.BODY);mHandle = new Handler(Looper.myLooper());mOkHttpClient = new OkHttpClient.Builder().readTimeout(3000, TimeUnit.SECONDS).connectTimeout(3000, TimeUnit.SECONDS).build();}private static OkHttpUtils mOkHttpUtils;public static OkHttpUtils getInstance() {if (mOkHttpUtils == null) {mOkHttpUtils = new OkHttpUtils();}return mOkHttpUtils;}//判断网络方法public boolean isNet(Context context) {ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);NetworkInfo activeNetworkInfo = manager.getActiveNetworkInfo();if (activeNetworkInfo != null) {return activeNetworkInfo.isAvailable();}return false;}//接口回调public interface OkHttpCallBack {void onResponse(String json);}//get方法public void doGet(String url, OkHttpCallBack callBack) {Request request = new Request.Builder().get().url(url).build();Call call = mOkHttpClient.newCall(request);call.enqueue(new Callback() {@Overridepublic void onFailure(@NotNull Call call, @NotNull IOException e) {}@Overridepublic void onResponse(@NotNull Call call, @NotNull Response response) throws IOException {String string = response.body().string();if (callBack != null) {mHandle.post(new Runnable() {@Overridepublic void run() {callBack.onResponse(string);}});}}});}

flitemlayout的布局在res下的drawable中写

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"android:shape="rectangle"><corners android:radius="20dp" /><sizeandroid:width="20dp"android:height="40dp" /><solid android:color="@color/colortextColor" /></shape>

这是mvp中负责展示的view层,(我们从这里开始展示数据)

首先是MainActivity,因为我们不使用这个view来进行数据展示,所以简单些只要一些viewpager和tablayout就行

public class MainActivity extends BaseActivity {private ViewPager pager;private TabLayout tab;private ArrayList<String> strings;private ArrayList<Fragment> fragments;private HomeFragment homeFragment;private OtherFragment otherFragment;//本页面只提供activity加fragment的效果@Overrideprotected void initData() {}@Overrideprotected void initView() {//查询资源idpager = (ViewPager) findViewById(R.id.viewpager);tab = (TabLayout) findViewById(R.id.tablayout);strings = new ArrayList<>();fragments = new ArrayList<>();homeFragment = new HomeFragment();otherFragment = new OtherFragment();strings.add("首页");strings.add("我的");fragments.add(homeFragment);fragments.add(otherFragment);pager.setAdapter(new FragmentPagerAdapter(getSupportFragmentManager()) {@NonNull@Overridepublic Fragment getItem(int position) {return fragments.get(position);}@Overridepublic int getCount() {return fragments.size();}@Nullable@Overridepublic CharSequence getPageTitle(int position) {return strings.get(position);}});tab.setupWithViewPager(pager);}@Overrideprotected int layoutID() {return R.layout.activity_main;}
}

我们在这里来进行数据的展示,简单点都好

public class MainActivity extends BaseActivity<MainPresenter> implements IMainContract.IMainView {@BindView(R.id.main_recycle)RecyclerView mainRecycle;private Unbinder unbinder;//数据@Overridepublic void setData(String json) {Toast.makeText(this, json + "", Toast.LENGTH_SHORT).show();List<MainBean.ResultBean> result = new Gson().fromJson(json, MainBean.class).getResult();MyRecycleView myRecycleView = new MyRecycleView(result, MainActivity.this);mainRecycle.setAdapter(myRecycleView);mainRecycle.setLayoutManager(new LinearLayoutManager(this, RecyclerView.VERTICAL, false));myRecycleView.setMyOnClickLisenter(new MyRecycleView.onItemClickLisenter() {@Overridepublic void onitemClickView(View view, String s) {EventBus.getDefault().postSticky("" + s);Intent intent = new Intent(MainActivity.this, LoginActivity.class);startActivity(intent);}});}@Overrideprotected void initData() {presenter.getHomeData();}@Overrideprotected MainPresenter initPresenter() {return new MainPresenter();}@Overrideprotected void initView() {unbinder = ButterKnife.bind(this);}@Overrideprotected int layoutID() {return R.layout.activity_main;}//解绑@Overrideprotected void onDestroy() {super.onDestroy();unbinder.unbind();}

因为是使用的recycleView所以还有adapter

public class MyRecycleView extends RecyclerView.Adapter<MyRecycleView.ViewHolder> {List<MainBean.ResultBean> result;Context context;public MyRecycleView(List<MainBean.ResultBean> result, Context context) {this.context = context;this.result = result;}@NonNull@Overridepublic ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {View view = View.inflate(context, R.layout.item_recycle, null);return new ViewHolder(view);}@Overridepublic void onBindViewHolder(@NonNull ViewHolder holder, int position) {//处理String commodityName = result.get(position).getCommodityName();String masterPic = result.get(position).getMasterPic();int price = result.get(position).getPrice();//控件holder.item_name.setText(commodityName);holder.item_price.setText(price + "");//frescoUri parse = Uri.parse(masterPic);holder.item_fresco.setImageURI(parse);}@Overridepublic int getItemCount() {return result.size();}public class ViewHolder extends RecyclerView.ViewHolder {@BindView(R.id.item_fresco)SimpleDraweeView item_fresco;@BindView(R.id.item_name)TextView item_name;@BindView(R.id.item_price)TextView item_price;public ViewHolder(@NonNull View itemView) {super(itemView);ButterKnife.bind(this, itemView);itemView.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {myOnClickLisenter.onitemClickView(v, result.get(getLayoutPosition()).getCommodityName());}});}}//创建接口public interface onItemClickLisenter {void onitemClickView(View view, String s);}private onItemClickLisenter myOnClickLisenter;public void setMyOnClickLisenter(onItemClickLisenter myOnClickLisenter) {this.myOnClickLisenter = myOnClickLisenter;}
}

对了权限记得加一个联网权限
还有记得要在AndroidManifest.xml中将app注释否则呵呵