图片加载 二维码 解析移动开发weixin47340783的博客-

图片加载 二维码 解析

1. layout布局文件

（1）activity_category.xml

<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="https://schemas.android.com/apk/res/android"     xmlns:app="https://schemas.android.com/apk/res-auto"     xmlns:tools="https://schemas.android.com/tools"     android:layout_width="match_parent"     android:layout_height="match_parent"     tools:context=".view.activity.MainActivity">    <androidx.recyclerview.widget.RecyclerView        android:id="@+id/categoryList"        android:background="@color/grgray"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentTop="true"       />     <FrameLayout        android:layout_below="@+id/categoryList"        android:layout_width="match_parent"        android:layout_height="match_parent">       <androidx.recyclerview.widget.RecyclerView           android:id="@+id/productList"           android:layout_width="wrap_content"           android:layout_height="wrap_content"           />       <androidx.recyclerview.widget.RecyclerView           android:id="@+id/secondList"           android:layout_width="wrap_content"           android:layout_height="wrap_content"           />    </FrameLayout>   </RelativeLayout> 

（2）activity_zxing.xml

<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="https://schemas.android.com/apk/res/android"     xmlns:app="https://schemas.android.com/apk/res-auto"     xmlns:tools="https://schemas.android.com/tools"     android:layout_width="match_parent"     android:layout_height="match_parent"     tools:context=".view.activity.MainActivity">     <Button        android:id="@+id/button"        android:layout_width="100dp"        android:layout_height="50dp"/>  </RelativeLayout> 

（3）item_category.xml

<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="https://schemas.android.com/apk/res/android"     xmlns:app="https://schemas.android.com/apk/res-auto"     xmlns:tools="https://schemas.android.com/tools"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:background="#99000000">      <TextView         android:id="@+id/oneName"         android:textSize="20sp"         android:layout_margin="20dp"         android:textColor="@color/encode_view"         android:layout_width="wrap_content"         android:layout_height="wrap_content"/>  </RelativeLayout> 

（4）item_category_products.xml

<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="https://schemas.android.com/apk/res/android"     xmlns:app="https://schemas.android.com/apk/res-auto"     xmlns:tools="https://schemas.android.com/tools"     android:layout_width="match_parent"     android:layout_height="match_parent"     >      <com.facebook.drawee.view.SimpleDraweeView         android:id="@+id/icon"         android:layout_alignParentTop="true"         android:layout_width="100dp"         app:placeholderImage="@mipmap/ic_launcher"         android:layout_centerInParent="true"         android:layout_height="100dp"/>      <TextView         android:id="@+id/productName"         android:textSize="16sp"         android:layout_centerHorizontal="true"         android:layout_below="@+id/icon"         android:textColor="@color/grgray"         android:layout_width="wrap_content"         android:layout_height="wrap_content"/>  </RelativeLayout> 

（5）item_category_second.xml

<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="https://schemas.android.com/apk/res/android"     xmlns:app="https://schemas.android.com/apk/res-auto"     xmlns:tools="https://schemas.android.com/tools"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:background="#99111111">      <com.facebook.drawee.view.SimpleDraweeView         android:id="@+id/icon"         android:layout_alignParentTop="true"         android:layout_width="100dp"         app:placeholderImage="@mipmap/ic_launcher"         android:layout_centerInParent="true"         android:layout_height="100dp"/>      <TextView         android:id="@+id/secondName"         android:textSize="20sp"         android:layout_centerHorizontal="true"         android:layout_below="@+id/icon"         android:textColor="@color/encode_view"         android:layout_width="wrap_content"         android:layout_height="wrap_content"/>  </RelativeLayout> 

2.java文件

（1）application包下的

1.Constant.java

package cj.com.a1711amvpproject.application;  public class Constant {     public static final String BASE_URL= "https://mobile.bwstudent.com/small/";     public static final String REGISTER = "user/v1/register";     public static final String LOGIN = "user/v1/login";     public static final String PRODUCT_LIST = "commodity/v1/commodityList";     public static final String ODER_LIST = "order/verify/v1/findOrderListByStatus";     public static final String CATEGORY_LIST = "commodity/v1/findCategory";     public static final String CATEGORY_PRODUCT_LIST = "commodity/v1/findCommodityByCategory";   } 

2.MyApplication.java

package cj.com.a1711amvpproject.application;  import android.app.Application; import android.content.Context;  import com.facebook.drawee.backends.pipeline.Fresco; import com.uuzuche.lib_zxing.activity.ZXingLibrary;  public class MyApplication extends Application {     public static Context mContext;     @Override     public void onCreate() {         super.onCreate();         mContext = this;         ZXingLibrary.initDisplayOpinion(this);         Fresco.initialize(this);     } }  

（2）contract包下的

ICategoryContract.java

package cj.com.a1711amvpproject.contract;  import cj.com.a1711amvpproject.model.bean.CategoryBean; import cj.com.a1711amvpproject.model.bean.HomeBean; import cj.com.a1711amvpproject.model.bean.ProductList; import cj.com.a1711amvpproject.view.interfaces.IBaseView;  public interface ICategoryContract {     //view     interface ICategoryView extends IBaseView {         void getCategorySuccess(CategoryBean bean);         void getProductListSuccess(ProductList productList);     }      //presenter     interface ICategoryPresenter{         void getCategory();     }      //model     interface ICategoryModel{         void getHomeData();     } } 

（3）model包下的

一.bean包

1.CategoryBean.java

                             alt+s即可 

2.ProductList.java

                             alt+s即可 

二.http包

HttpUtils2.java

public class HttpUtils2 {     private static HttpUtils2 httpUtils;      private HttpUtils2() {     }      public static HttpUtils2 getInstance() {         if (httpUtils == null) {             httpUtils = new HttpUtils2();         }         return httpUtils;     }      private CallbackData mCallbackData;     //get 请求     public void getData(String url,CallbackData callbackData) {         this.mCallbackData = callbackData;         //1、初始化 HttpClient 对象         //OkHttpClient okHttpClient = new OkHttpClient();         OkHttpClient okHttpClient = new OkHttpClient.Builder()                 .addInterceptor(new LogginInterceptor())                 .build();         //2、创建Request对象 先创建Build 的对象 new XXX.Build(); .......build;         //why 1、设置属性（构造方法、setter getter）         Request request = new Request.Builder().url(url).get().build();         //3、把 request 赋值给okHttpClient 创建call 对象         Call call = okHttpClient.newCall(request);         //同步请求         //call.execute();         //4、调用 异步请求         call.enqueue(new Callback() {             @Override             public void onFailure(Call call, IOException e) {              }              @Override             public void onResponse(Call call, Response response) throws IOException {                 //子线程                 String data = response.body().string();                 Message message = handler.obtainMessage();                 message.obj = data;                 handler.sendMessage(message);                 Log.e("myMessage", "=== " + data);             }         });     }       @SuppressLint("HandlerLeak")     Handler handler = new Handler(){         @Override         public void handleMessage(@NonNull Message msg) {             super.handleMessage(msg);             String data = (String) msg.obj;             mCallbackData.success(data);         }     };      public interface CallbackData{         void success(String data);     }      //post 请求     public void postData(String url, HashMap<String, String> params) {         //1、初始化 HttpClient 对象         //OkHttpClient okHttpClient = new OkHttpClient();         OkHttpClient okHttpClient = new OkHttpClient.Builder()                 .addInterceptor(new LogginInterceptor())                 .build();         //2、创建RequestBody 对象         FormBody.Builder builder = new FormBody.Builder();         Iterator<Map.Entry<String, String>> iterator = params.entrySet().iterator();         while (iterator.hasNext()) {             Map.Entry<String, String> next = iterator.next();             String key = next.getKey();             String value = next.getValue();             builder.add(key, value);         }         FormBody body = builder.build();          //3、创建Request对象         Request request = new Request.Builder().url(url).post(body).build();         //4、把 request 赋值给okHttpClient 创建call 对象         Call call = okHttpClient.newCall(request);         //同步请求         //call.execute();         //5、调用 异步请求         call.enqueue(new Callback() {             @Override             public void onFailure(Call call, IOException e) {              }              @Override             public void onResponse(Call call, Response response) throws IOException {                 //子线程                 String data = response.body().string();                  Log.e("myMessage", "=== " + data);             }         });     }         public class LogginInterceptor implements Interceptor{         @Override         public Response intercept(Chain chain) throws IOException {             Request request = chain.request();             Response response =  chain.proceed(request);             return response;         }     }   } 

（4）presenter包下的

1.BasePresenter.java

public class BasePresenter<V extends IBaseView> {     private V view;      public V getView() {         return view;     }      public void setView(V view) {         this.view = view;     }      public void detachView() {         if (view != null) {             view = null;         }     } } 

2.CategroyPresenter.java

public class CategroyPresenter extends BasePresenter<ICategoryContract.ICategoryView> implements ICategoryContract.ICategoryPresenter {      private final HttpUtils2 httpUtils2;      public CategroyPresenter(){         httpUtils2 = HttpUtils2.getInstance();     }     @Override     public void getCategory() {         httpUtils2.getData(Constant.BASE_URL + Constant.CATEGORY_LIST, new HttpUtils2.CallbackData() {             @Override             public void success(String data) {                 Gson gson = new Gson();                 CategoryBean categoryBean = gson.fromJson(data, CategoryBean.class);                 getView().getCategorySuccess(categoryBean);             }         });     }      public void getProductsById(String categoryId,int page){         String url = Constant.BASE_URL + Constant.CATEGORY_PRODUCT_LIST +"?categoryId="+categoryId+"&page="+page+"&count=10";         httpUtils2.getData(url, new HttpUtils2.CallbackData() {             @Override             public void success(String data) {                 Gson gson = new Gson();                 ProductList productList = gson.fromJson(data, ProductList.class);                 getView().getProductListSuccess(productList);             }         });     } } 

（5）view包下的

1.BasePresenter.java

一.activity包

（1）BaseActivity.java

public abstract class BaseActivity<P extends BasePresenter> extends AppCompatActivity implements IBaseView {      private P presenter;      @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(setSelfContentView());         initView();         presenter = setSelfPresenter();         if(presenter!=null) {             presenter.setView(this);         }         initData();      }       abstract int setSelfContentView();     abstract void initView();     abstract P setSelfPresenter();     abstract void initData();      public P getPresenter() {         return presenter;     }      @Override     protected void onDestroy() {         super.onDestroy();         if(presenter!=null) {             presenter.detachView();         }     } } 

（2）CategoryActivity.java

public class CategoryActivity extends BaseActivity<CategroyPresenter> implements ICategoryContract.ICategoryView {      private RecyclerView recyclerView;     private RecyclerView secondList;     private RecyclerView productList;     private CategoryAdapter categoryAdapter;     private CategorySecondAdapter categorySecondAdapter;     private CategoryProductAdapter categoryProductAdapter;     private List<CategoryBean.ResultBean> resultBeans;      @Override     int setSelfContentView() {         return R.layout.activity_category;     }      @Override     void initView() {         //一级分类         recyclerView = findViewById(R.id.categoryList);         categoryAdapter = new CategoryAdapter(this, new CategoryAdapter.ClickItemCallback() {             @Override             public void clickItem(View view, int position) {                 TextView textView = (TextView) view;                 textView.setTextColor(Color.RED);                 categorySecondAdapter.setData(resultBeans.get(position).getSecondCategoryVo());             }         });         recyclerView.setLayoutManager(new LinearLayoutManager(this,RecyclerView.HORIZONTAL,false));         recyclerView.setAdapter(categoryAdapter);           //二级分类         secondList = findViewById(R.id.secondList);         secondList.setLayoutManager(new LinearLayoutManager(this,RecyclerView.HORIZONTAL,false));         categorySecondAdapter = new CategorySecondAdapter(this, new CategorySecondAdapter.ClickItemCallback() {             @Override             public void clickItem(String categoryId) {                 loadProductById(categoryId);             }           });         secondList.setAdapter(categorySecondAdapter);          //商品列表         productList = findViewById(R.id.productList);         productList.setLayoutManager(new GridLayoutManager(this,2));         categoryProductAdapter = new CategoryProductAdapter(this);         productList.setAdapter(categoryProductAdapter);        }      @Override     CategroyPresenter setSelfPresenter() {         return new CategroyPresenter();     }      @Override     void initData() {         getPresenter().getCategory();     }      private void loadProductById(String categoryId) {         getPresenter().getProductsById(categoryId,1);     }      @Override     public void getCategorySuccess(CategoryBean bean) {         resultBeans = bean.getResult();         categoryAdapter.setData(resultBeans);     }      @Override     public void getProductListSuccess(ProductList productList) {         categoryProductAdapter.setData(productList.getResult());     } } 

（3）ZxingActivity.java

public class ZxingActivity extends AppCompatActivity {     @Override     protected void onCreate(@Nullable Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_zxing);         findViewById(R.id.button).setOnClickListener(new View.OnClickListener() {             @Override             public void onClick(View v) {                 Intent intent = new Intent(ZxingActivity.this, CaptureActivity.class);                 startActivityForResult(intent, 1001);             }         });     }      @Override     protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {         super.onActivityResult(requestCode, resultCode, data);         /**          * 处理二维码扫描结果          */          if (requestCode == 1001) {             //处理扫描结果（在界面上显示）             if (null != data) {                 Bundle bundle = data.getExtras();                 if (bundle == null) {                     return;                 }                 if (bundle.getInt(CodeUtils.RESULT_TYPE) == CodeUtils.RESULT_SUCCESS) {                     String result = bundle.getString(CodeUtils.RESULT_STRING);                     Toast.makeText(this, "解析结果:" + result, Toast.LENGTH_LONG).show();                 } else if (bundle.getInt(CodeUtils.RESULT_TYPE) == CodeUtils.RESULT_FAILED) {                     Toast.makeText(this, "解析二维码失败", Toast.LENGTH_LONG).show();                 }             }         }     } } 

二.adapter包

（1）CategoryAdapter.java

public class CategoryAdapter extends RecyclerView.Adapter {     private Context mContext;     private ClickItemCallback mClickItemCallback;     public CategoryAdapter(Context context,ClickItemCallback clickItemCallback) {         this.mContext = context;         this.mClickItemCallback = clickItemCallback;     }       @NonNull     @Override     public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {         View view = LayoutInflater.from(mContext).inflate(R.layout.item_category, null);         return new ViewHolder(view);     }       ArrayList<TextView> arrayList = new ArrayList<>();     @Override     public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, final int position) {         ViewHolder viewHolder = (ViewHolder) holder;         viewHolder.oneName.setText(list.get(position).getName());         arrayList.add(viewHolder.oneName);         viewHolder.oneName.setOnClickListener(new View.OnClickListener() {             @Override             public void onClick(View v) {                 for (int i = 0; i < arrayList.size(); i++) {                     TextView textView = arrayList.get(i);                     textView.setTextColor(Color.WHITE);                 }                 mClickItemCallback.clickItem(v,position);                 notifyDataSetChanged();              }         });     }      public interface ClickItemCallback{         void clickItem(View view,int position);     }      @Override     public int getItemCount() {         if(list!=null) {            return list.size();         }         return 0;     }      private List<CategoryBean.ResultBean> list;     public void setData(List<CategoryBean.ResultBean> result) {         list = result;         notifyDataSetChanged();     }      class ViewHolder extends RecyclerView.ViewHolder{         TextView oneName;         public ViewHolder(@NonNull View itemView) {             super(itemView);             oneName = itemView.findViewById(R.id.oneName);         }     } } 

（2）CategoryProductAdapter.java

public class CategoryProductAdapter extends RecyclerView.Adapter {     private Context mContext;      public CategoryProductAdapter(Context context) {         this.mContext = context;     }       @NonNull     @Override     public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {         View view = LayoutInflater.from(mContext).inflate(R.layout.item_category_products, null);         return new ViewHolder(view);     }      @Override     public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, int position) {         ViewHolder viewHolder = (ViewHolder) holder;         viewHolder.productName.setText(list.get(position).getCommodityName());         viewHolder.icon.setImageURI(list.get(position).getMasterPic());         viewHolder.icon.setOnClickListener(new View.OnClickListener() {             @Override             public void onClick(View v) {              }         });     }      @Override     public int getItemCount() {         if(list!=null) {            return list.size();         }         return 0;     }      private List<ProductList.ResultBean> list;     public void setData(List<ProductList.ResultBean> result) {         list = result;         notifyDataSetChanged();     }      class ViewHolder extends RecyclerView.ViewHolder{         TextView productName;         SimpleDraweeView icon;         View view;         public ViewHolder(@NonNull View itemView) {             super(itemView);             view = itemView;             productName = itemView.findViewById(R.id.productName);             icon = itemView.findViewById(R.id.icon);         }     } } 

（3）CategorySecondAdapter.java

public class CategorySecondAdapter extends RecyclerView.Adapter {     private Context mContext;     private ClickItemCallback clickItemCallback;      public CategorySecondAdapter(Context context,ClickItemCallback clickItemCallback) {         this.mContext = context;         this.clickItemCallback = clickItemCallback;     }       @NonNull     @Override     public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {         View view = LayoutInflater.from(mContext).inflate(R.layout.item_category_second, null);         return new ViewHolder(view);     }      @Override     public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, final int position) {         ViewHolder viewHolder = (ViewHolder) holder;         viewHolder.secondName.setText(list.get(position).getName());         //viewHolder.icon.setImageURI();         viewHolder.icon.setOnClickListener(new View.OnClickListener() {             @Override             public void onClick(View v) {                 clickItemCallback.clickItem(list.get(position).getId());             }         });     }      public interface ClickItemCallback{         void clickItem(String categoryId);     }      @Override     public int getItemCount() {         if(list!=null) {            return list.size();         }         return 0;     }      private List<CategoryBean.ResultBean.SecondCategoryVoBean> list;     public void setData(List<CategoryBean.ResultBean.SecondCategoryVoBean> result) {         list = result;         notifyDataSetChanged();     }      class ViewHolder extends RecyclerView.ViewHolder{         TextView secondName;         SimpleDraweeView icon;         View view;         public ViewHolder(@NonNull View itemView) {             super(itemView);             view = itemView;             secondName = itemView.findViewById(R.id.secondName);             icon = itemView.findViewById(R.id.icon);         }     } } 

三.interfaces包

IBaseView.java

public interface IBaseView { } 

3.assets文件

test.html文档导入 

4.AndroidManifest.xml文件

<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="https://schemas.android.com/apk/res/android"     package="cj.com.a1711amvpproject">      <application         android:name=".application.MyApplication"         android:allowBackup="true"         android:icon="@mipmap/ic_launcher"         android:label="@string/app_name"         android:roundIcon="@mipmap/ic_launcher_round"         android:supportsRtl="true"         android:theme="@style/AppTheme">         <activity android:name=".view.activity.CategoryActivity">             <intent-filter>                 <action android:name="android.intent.action.MAIN" />                  <category android:name="android.intent.category.LAUNCHER" />             </intent-filter>         </activity>         <activity android:name=".view.activity.WebViewActivity"/>     </application>     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />     <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />      <uses-permission android:name="android.permission.INTERNET" />  </manifest>