• Retrofit

    1.导入依赖 

    1.   //Retrofit 核心库
    2.     implementation("com.squareup.retrofit2:retrofit:2.9.0")
    3.     //响应数据自动序列化
    4.     //JSON
    5.     implementation("com.squareup.retrofit2:converter-gson:2.9.0")
    6.     //String类型
    7.     implementation("com.squareup.retrofit2:converter-scalars:2.9.0")
    8.     //拦截器 logging
    9.     implementation("com.squareup.okhttp3:logging-interceptor:3.14.+")

    2.需要配置清单文件

    1. "1.0" encoding="utf-8"?>
    2. <manifest xmlns:android="http://schemas.android.com/apk/res/android">
    3.  
    4.     <uses-permission android:name="android.permission.INTERNET"/>
    5.     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
    6.     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    7.  
    8.     <application
    9.         android:allowBackup="true"
    10.         android:icon="@mipmap/ic_launcher"
    11.         android:label="@string/app_name"
    12.         android:roundIcon="@mipmap/ic_launcher_round"
    13.         android:supportsRtl="true"
    14.         android:theme="@style/Theme.OkHttp"
    15.         android:networkSecurityConfig="@xml/network_security_config">
    16.         <activity
    17.             android:name=".MainActivity"
    18.             android:exported="true">
    19.             <intent-filter>
    20.                 <action android:name="android.intent.action.MAIN" />
    21.  
    22.                 <category android:name="android.intent.category.LAUNCHER" />
    23.             intent-filter>
    24.         activity>
    25.  
    26.         <provider
    27.  
    28.             android:authorities="${applicationId}.provider"
    29.             android:name="androidx.core.content.FileProvider"
    30.             android:exported="false"
    31.             android:grantUriPermissions="true">
    32.             <meta-data
    33.                 android:name="android.support.FILE_PROVIDER_PATHS"
    34.                 android:resource="@xml/provider_paths"/>
    35.         provider>
    36.     application>
    37.  
    38. manifest>

    3.网络权限和 provider

    provider_paths.xml

    1. "1.0" encoding="utf-8" ?>
    2. <paths>
    3.     <external-path
    4.         name="aaa"
    5.         path="."/>
    6.     
    7. paths>

    network_security_config.xml

    1. "1.0" encoding="utf-8"?>
    2. <network-security-config>
    3.     <base-config cleartextTrafficPermitted="true" />
    4. network-security-config>

    4.xml

    1. "1.0" encoding="utf-8"?>
    2. <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    3.     xmlns:app="http://schemas.android.com/apk/res-auto"
    4.     xmlns:tools="http://schemas.android.com/tools"
    5.     android:layout_width="match_parent"
    6.     android:layout_height="match_parent"
    7.     tools:context=".MainActivity">
    8.  
    9.     <Button
    10.         android:id="@+id/upload"
    11.         android:layout_width="match_parent"
    12.         android:layout_height="wrap_content"
    13.         android:text="上传图片"
    14.         app:layout_constraintBottom_toBottomOf="parent"
    15.         app:layout_constraintEnd_toEndOf="parent"
    16.         app:layout_constraintStart_toStartOf="parent"
    17.         app:layout_constraintTop_toTopOf="parent" />
    18.  
    19. androidx.constraintlayout.widget.ConstraintLayout>

    5.ApiService

    1. package com.tiger.retrofel.api;
    2.  
    3. import java.util.List;
    4. import java.util.Map;
    5.  
    6. import okhttp3.MultipartBody;
    7. import retrofit2.Call;
    8. import retrofit2.http.Field;
    9. import retrofit2.http.FormUrlEncoded;
    10. import retrofit2.http.GET;
    11. import retrofit2.http.Multipart;
    12. import retrofit2.http.POST;
    13. import retrofit2.http.Part;
    14. import retrofit2.http.Query;
    15.  
    16. public interface ApiService {
    17.  
    18.     @POST("findList")
    19.     @FormUrlEncoded
    20.     Call> test(
    21.             @Field("start") Integer start,
    22.             @Field("count") Integer count
    23.     );
    24.  
    25.     @POST("uploadPic")
    26.     @Multipart
    27.     Call> upload(
    28.             @Part MultipartBody.Part part
    29.             );
    30.  
    31.  
    32.  
    33.  
    34. }

    6.权限工具类

    1. package com.tiger.retrofel;
    2.  
    3. import android.Manifest;
    4. import android.app.Activity;
    5. import android.content.pm.PackageManager;
    6. import android.os.Build;
    7.  
    8. import androidx.core.app.ActivityCompat;
    9. import androidx.core.content.ContextCompat;
    10.  
    11. public class PermissionUtil {
    12.  
    13.     public static final String[] PERMISSIONS_EXTERNAL_STORAGE = new String[]{
    14.             Manifest.permission.READ_EXTERNAL_STORAGE,
    15.             Manifest.permission.WRITE_EXTERNAL_STORAGE
    16.     };
    17.  
    18.  
    19.     public static final int PERMISSIONS_EXTERNAL_STORAGE_TAG = 1;
    20.  
    21.  
    22.     //检查多个权限。返回true表示已完全启用权限，返回false 表示 未完全启用权限
    23.     public static boolean checkPermission(Activity act, String[] permissions, int requestCode) {
    24.  
    25.         //Android 6.0之后开始采用动态权限管理
    26.         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
    27.             int check = PackageManager.PERMISSION_GRANTED;
    28.             for (String permission : permissions) {
    29.                 check = ContextCompat.checkSelfPermission(act, permission);
    30.                 if (check != PackageManager.PERMISSION_GRANTED) {
    31.                     break;
    32.                 }
    33.             }
    34.             //未开启该权限，则请求系统弹窗，好让用户选择 是否立即开启权限
    35.             if (check != PackageManager.PERMISSION_GRANTED) {
    36.                 ActivityCompat.requestPermissions(act, permissions, requestCode);
    37.                 return false;
    38.             }
    39.  
    40.         }
    41.  
    42.         return true;
    43.     }
    44.  
    45.  
    46.     public static boolean checkGrant(int[] grantResults) {
    47.         if (grantResults != null) {
    48.             for (int grantResult : grantResults) {
    49.                 if (grantResult != PackageManager.PERMISSION_GRANTED) {
    50.                     return false;
    51.                 }
    52.             }
    53.             return true;
    54.         } else {
    55.             return false;
    56.         }
    57.     }
    58. }

    7.Activity

    1. package com.tiger.retrofel;
    2.  
    3. import androidx.annotation.Nullable;
    4. import androidx.appcompat.app.AppCompatActivity;
    5.  
    6. import android.app.Activity;
    7. import android.content.Intent;
    8. import android.database.Cursor;
    9. import android.net.Uri;
    10. import android.os.Bundle;
    11. import android.provider.MediaStore;
    12. import android.util.Log;
    13. import android.view.View;
    14. import android.widget.Button;
    15.  
    16. import com.tiger.retrofel.api.ApiService;
    17. import com.tiger.retrofel.api.Subject;
    18.  
    19. import java.io.File;
    20. import java.io.IOException;
    21. import java.util.List;
    22. import java.util.Map;
    23.  
    24. import okhttp3.MediaType;
    25. import okhttp3.MultipartBody;
    26. import okhttp3.OkHttpClient;
    27. import okhttp3.RequestBody;
    28. import okhttp3.logging.HttpLoggingInterceptor;
    29. import retrofit2.Call;
    30. import retrofit2.Callback;
    31. import retrofit2.Response;
    32. import retrofit2.Retrofit;
    33. import retrofit2.converter.gson.GsonConverterFactory;
    34. import retrofit2.converter.scalars.ScalarsConverterFactory;
    35.  
    36. public class MainActivity extends AppCompatActivity {
    37.     Retrofit retrofit;
    38.     private OkHttpClient client;
    39.     private ApiService apiService;
    40.  
    41.  
    42.     @Override
    43.     protected void onCreate(Bundle savedInstanceState) {
    44.         super.onCreate(savedInstanceState);
    45.         setContentView(R.layout.activity_main);
    46.  
    47.         HttpLoggingInterceptor httpLoggingInterceptor = new HttpLoggingInterceptor(new HttpLoggingInterceptor.Logger() {
    48.             @Override
    49.             public void log(String message) {
    50.                 Log.i("TAG", message);
    51.             }
    52.         }).setLevel(HttpLoggingInterceptor.Level.BASIC);
    53.  
    54.         client = new OkHttpClient.Builder()
    55.                 .addInterceptor(httpLoggingInterceptor)
    56.                 .build();
    57.         retrofit = new Retrofit.Builder()
    58.                 .baseUrl("http://192.168.202.55:8999/")
    59.                 .client(client)
    60. //                .addConverterFactory(ScalarsConverterFactory.create())
    61.                 .addConverterFactory(GsonConverterFactory.create())
    62.                 .build();
    63.  
    64.         apiService = retrofit.create(ApiService.class);
    65.  
    66.         Button viewById = findViewById(R.id.upload);
    67.         viewById.setOnClickListener(new View.OnClickListener() {
    68.             @Override
    69.             public void onClick(View v) {
    70.                 showPhoto();
    71.             }
    72.         });
    73.  
    74.         syncRequest();
    75.  
    76.     }
    77.  
    78.     //同步的请求
    79.     private void syncRequest() {
    80.         //同步
    81.         new Thread(() -> {
    82.  
    83.             Response> execute = null;
    84.             try {
    85.                 execute = apiService.test(0, 2).execute();
    86.             } catch (IOException e) {
    87.                 throw new RuntimeException(e);
    88.             }
    89.             Map body = execute.body();
    90.                 Log.i("ning", "run:response：" + body);
    91.  
    92.         }).start();
    93.  
    94.     }
    95.  
    96.  
    97.     //异步的请求
    98.     private void ayncRequest() {
    99.         //同步
    100.  
    101.             try {
    102.                  apiService.test(0, 2).enqueue(new Callback>() {
    103.                      @Override
    104.                      public void onResponse(Call> call, Response> response) {
    105.  
    106.                      }
    107.  
    108.                      @Override
    109.                      public void onFailure(Call> call, Throwable t) {
    110.  
    111.                      }
    112.                  });
    113.  
    114.             } catch (Exception e) {
    115.               e.printStackTrace();
    116.             }
    117.  
    118.  
    119.     }
    120.     private void showPhoto() {
    121.  
    122.         if (PermissionUtil.checkPermission(this, PermissionUtil.PERMISSIONS_EXTERNAL_STORAGE, PermissionUtil.PERMISSIONS_EXTERNAL_STORAGE_TAG)) {
    123.             //有权限
    124.             // 跳转到系统相册，选择图片，并返回
    125.             Intent intent = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
    126.  
    127.             startActivityForResult(intent,1);
    128.         }
    129.  
    130.  
    131.     }
    132.  
    133.  
    134.     @Override
    135.     protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
    136.         super.onActivityResult(requestCode, resultCode, data);
    137. //        Log.d("ning","进来了"+resultCode+":"+resultCode);
    138.         //获取图片路径
    139.         if (requestCode==1 && resultCode == Activity.RESULT_OK &&data!=null){
    140.             Uri selectedImage = data.getData();
    141.             String[] filePathColumns ={MediaStore.Images.Media.DATA};
    142.             Cursor query = getContentResolver().query(selectedImage, filePathColumns, null, null, null);
    143.             query.moveToFirst();
    144.             int columnIndex = query.getColumnIndex(filePathColumns[0]);
    145.             String string = query.getString(columnIndex);
    146.             Log.d("ning",string);
    147.             uploadFile(string);
    148.             query.close();
    149.         }
    150.     }
    151.  
    152.  
    153.  
    154.     public void uploadFile(String path){
    155.         File file = new File(path);
    156.         RequestBody requestBody = RequestBody.create(MediaType.parse("image/jp"),file);
    157.  
    158.         MultipartBody.Part part = MultipartBody.Part.createFormData("pic",file.getName(),requestBody);
    159.  
    160.      apiService.upload(part).enqueue(new Callback>() {
    161.          @Override
    162.          public void onResponse(Call> call, Response> response) {
    163.              Log.d("ning",response.body().get("result").toString());
    164.          }
    165.  
    166.          @Override
    167.          public void onFailure(Call> call, Throwable t) {
    168.  
    169.          }
    170.      });
    171.  
    172.  
    173.     }
    174.  
    175. }

    8.实体类

    1. public class Subject {
    2.     private String episodes_info;
    3.     private String rate;
    4.     private Integer cover_x;
    5.     private String title;
    6.     private String url;
    7.     private Boolean playable;
    8.     private String cover;
    9.     private String id;
    10.     private Integer cover_y;
    11.     private Boolean is_new;

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  • 原文地址：https://blog.csdn.net/qq_53374893/article/details/136625390