android okhttp+解析json( okhttp 工具类）

今天药忘吃喽~ 2023-06-12 09:17 63阅读 0赞

2019.12.28更新

# 注意点： #

1.只需要在AndroidManifest.xml application 属性中添加 ，就可以访问 http,而不是https

android:usesCleartextTraffic="true"

2.检查项目网络权限有没有开

3.检查模拟机网络权限有没有开

4.卸载软件，点击重新安装。

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1amluZzFfMQ_size_16_color_FFFFFF_t_70][]

我选择的免费的接口

https://api.apiopen.top/musicBroadcasting

json格式比较复杂，所以实体类较多

# 下面是项目结构 #

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1amluZzFfMQ_size_16_color_FFFFFF_t_70 1][]

# 1.在AndroidManifest.xml中添加网络请求权限 #

<uses-permission android:name="android.permission.INTERNET" />
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
     <uses-permission android:name="android.permission.CAMERA" />
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
     <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />

##  在build.grandle中添加（版本在29较高，所以你们可以选择小一点的） ##

implementation 'com.google.code.gson:gson:2.8.6'
    implementation 'com.squareup.okhttp3:okhttp:4.2.0'

# 2.创建json对应的实体类 #

## Music类 ##

import java.util.List;
    
    public class Music {
        private String code;
        private String message;
        private List<Result> result;
    
        @Override
        public String toString() {
            return "Music{" +
                    "code='" + code + '\'' +
                    ", message='" + message + '\'' +
                    ", result=" + result +
                    '}';
        }
    
        public String getCode() {
            return code;
        }
    
        public void setCode(String code) {
            this.code = code;
        }
    
        public String getMessage() {
            return message;
        }
    
        public void setMessage(String message) {
            this.message = message;
        }
    
        public List<Result> getResult() {
            return result;
        }
    
        public void setResult(List<Result> result) {
            this.result = result;
        }
    }

## Result类 ##

import java.util.List;
    
    public class Result {
        private List<Channellist> channellist;
        private String title;
        private String cid;
    
        @Override
        public String toString() {
            return "Result{" +
                    "channellist=" + channellist +
                    ", title='" + title + '\'' +
                    ", cid='" + cid + '\'' +
                    '}';
        }
    
        public List<Channellist> getChannellist() {
            return channellist;
        }
    
        public void setChannellist(List<Channellist> channellist) {
            this.channellist = channellist;
        }
    
        public String getTitle() {
            return title;
        }
    
        public void setTitle(String title) {
            this.title = title;
        }
    
        public String getCid() {
            return cid;
        }
    
        public void setCid(String cid) {
            this.cid = cid;
        }
    }

## Channellist类 ##

package com.example.myapplication.movies;
    
    public class Channellist {
        private  String thumb;
        private String name;
        private String cate_name;
        private String cate_sname;
        private int value;
        private String channelid;
    
        @Override
        public String toString() {
            return "Channellist{" +
                    "thumb='" + thumb + '\'' +
                    ", name='" + name + '\'' +
                    ", cate_name='" + cate_name + '\'' +
                    ", cate_sname='" + cate_sname + '\'' +
                    ", value=" + value +
                    ", channelid='" + channelid + '\'' +
                    '}';
        }
    
        public String getThumb() {
            return thumb;
        }
    
        public void setThumb(String thumb) {
            this.thumb = thumb;
        }
    
        public String getName() {
            return name;
        }
    
        public void setName(String name) {
            this.name = name;
        }
    
        public String getCate_name() {
            return cate_name;
        }
    
        public void setCate_name(String cate_name) {
            this.cate_name = cate_name;
        }
    
        public String getCate_sname() {
            return cate_sname;
        }
    
        public void setCate_sname(String cate_sname) {
            this.cate_sname = cate_sname;
        }
    
        public int getValue() {
            return value;
        }
    
        public void setValue(int value) {
            this.value = value;
        }
    
        public String getChannelid() {
            return channelid;
        }
    
        public void setChannelid(String channelid) {
            this.channelid = channelid;
        }
    }

# 3.创建okhttp的工具类 #

OKHttpUtils 类

package com.example.vae.webcontroller;
    
    import android.content.Context;
    import android.database.Cursor;
    import android.graphics.Bitmap;
    import android.graphics.BitmapFactory;
    import android.net.Uri;
    import android.os.Handler;
    import android.os.Message;
    import android.provider.MediaStore;
    import android.util.Log;
    
    
    import com.google.gson.Gson;
    import com.google.gson.GsonBuilder;
    import com.google.gson.JsonDeserializationContext;
    import com.google.gson.JsonDeserializer;
    import com.google.gson.JsonElement;
    import com.google.gson.JsonParseException;
    
    import org.jetbrains.annotations.NotNull;
    
    import java.io.File;
    import java.io.FileNotFoundException;
    import java.io.FileOutputStream;
    import java.io.IOException;
    
    import java.lang.reflect.Type;
    import java.util.Date;
    import java.util.List;
    import java.util.Map;
    
    import okhttp3.Call;
    import okhttp3.Callback;
    import okhttp3.FormBody;
    import okhttp3.MediaType;
    import okhttp3.MultipartBody;
    import okhttp3.OkHttpClient;
    import okhttp3.Request;
    import okhttp3.RequestBody;
    import okhttp3.Response;
    import retrofit2.http.Url;
    
    /**
     * OKHttp网络请求工具类
     * get
     * post
     * 上传图片
     */
    
    public class OKHttpUtils {
        private static final MediaType JSON = MediaType.parse("application/json; charset=utf-8");
        private OKHttpGetListener onOKHttpGetListener;
        private MyHandler myHandler = new MyHandler();
        private static final String TAG = "OKHttpUitls";
        private OkHttpClient client = null;
    
        private String BaseUrl="https://api.apiopen.top/";
    
    //    private String BaseUrl="http://47.100.104.187:8080/ssm05/";
    
        // /get
        public void get(String url) {
    
            url=BaseUrl+url;
            try {
                if (client == null) {
                    client = new OkHttpClient();
                }
                //创建请求对象
                Request request = new Request.Builder().url(url).build();
                //创建Call请求队列
                //请求都是放到一个队列里面的
                Call call = client.newCall(request);
    
                Log.d(TAG, "get() returned: " + call + "------------");
                //开始请求
                call.enqueue(new Callback() {
                    //       失败，成功的方法都是在子线程里面，不能直接更新UI
                    @Override
                    public void onFailure(Call call, IOException e) {
                        Message message = myHandler.obtainMessage();
                        message.obj = "请求失败";
                        message.what = 0;
                        myHandler.sendMessage(message);
                    }
    
                    @Override
                    public void onResponse(Call call, Response response) throws IOException {
                        Message message = myHandler.obtainMessage();
                        String json = response.body().string();
                        message.obj = json;
                        message.what = 1;
                        myHandler.sendMessage(message);
                    }
                });
            } catch (Exception e) {
                e.printStackTrace();
            }
    
        }
    
        //    post 请求
        public void post(String url, Map<String, Object> params) {
            try {
                if (client == null) {
                    client = new OkHttpClient();
                }
                url=BaseUrl+url;
                FormBody.Builder builder = new FormBody.Builder();
                if (params != null) {
                    for (Map.Entry<String, Object> entry : params.entrySet()) {
                        Log.i("参数:", entry.getKey() + ":" + entry.getValue());
                        builder.add(entry.getKey(), entry.getValue().toString());
                    }
                }
    
    
                RequestBody requestBody = builder.build();
                Request request = new Request.Builder()
                        .url(url)
                        .post(requestBody)
                        .build();
                Call call = client.newCall(request);
                call.enqueue(new Callback() {
                    @Override
                    public void onFailure(@NotNull Call call, @NotNull IOException e) {
                        Message message = myHandler.obtainMessage();
                        message.obj = "请求失败";
                        message.what = 0;
                        myHandler.sendMessage(message);
                    }
    
                    @Override
                    public void onResponse(@NotNull Call call, @NotNull Response response) throws IOException {
                        Message message = myHandler.obtainMessage();
                        String json = response.body().string();
                        message.obj = json;
                        message.what = 1;
                        myHandler.sendMessage(message);
                    }
                });
    
    
            } catch (Exception e) {
                e.printStackTrace();
            }
    
        }
    
    
        public void POST_JSON(String url, Map<String, Object> params) {
            try {
                if (client == null) {
                    client = new OkHttpClient();
                }
                url=BaseUrl+url;
    
                GsonBuilder builder = new GsonBuilder();
                // Register an adapter to manage the date types as long values
                builder.registerTypeAdapter(Date.class, new JsonDeserializer<Date>() {
                    public Date deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
                        return new Date(json.getAsJsonPrimitive().getAsLong());
                    }
                });
    
                Gson gson = builder.create();
                String json=gson.toJson(params);
                Log.d("json",json);
    
                RequestBody body = RequestBody.create(MediaType.parse("application/json"), json);
                Request request = new Request.Builder()
                        .url(url)
                        .post(body)
                        .build();
    
    
                Call call = client.newCall(request);
                call.enqueue(new Callback() {
                    @Override
                    public void onFailure(@NotNull Call call, @NotNull IOException e) {
                        Message message = myHandler.obtainMessage();
                        message.obj = "请求失败";
                        message.what = 0;
                        myHandler.sendMessage(message);
                    }
    
                    @Override
                    public void onResponse(@NotNull Call call, @NotNull Response response) throws IOException {
                        Message message = myHandler.obtainMessage();
                        String json = response.body().string();
                        message.obj = json;
                        message.what = 1;
                        myHandler.sendMessage(message);
                    }
                });
    
    
            } catch (Exception e) {
                e.printStackTrace();
            }
    
        }
    
    
    
    
        private static final MediaType MEDIA_TYPE_PNG = MediaType.parse("image/*");
    
        //    上传图片地址
        public void photo(String url, List<String> photoPath, Map<String, Object> params) {
    
            try {
                url=BaseUrl+url;
                if (client == null) {
                    client = new OkHttpClient();
                }
                MultipartBody.Builder builder = new MultipartBody.Builder().setType(MultipartBody.FORM);
    
    //            添加参数
                if (params != null) {
                    for (Map.Entry<String, Object> entry : params.entrySet()) {
                        Log.i("参数:", entry.getKey() + ":" + entry.getValue());
                        builder.addFormDataPart(entry.getKey(), entry.getValue().toString());
                    }
                }
    //            添加图片
                if (photoPath.size() > 0) {
                    for (int i = 0; i < photoPath.size(); i++) {
                        File f = new File(photoPath.get(i));
                        if (f == null) break;
                        try {
                            BitmapFactory.Options options = new BitmapFactory.Options();
                            options.inPreferredConfig = Bitmap.Config.RGB_565;
                            Bitmap bm = BitmapFactory.decodeFile(f.getAbsolutePath(), options);
                            bm.compress(Bitmap.CompressFormat.JPEG, 90, new FileOutputStream(f));
                            bm.recycle();
                        } catch (FileNotFoundException e) {
                            e.printStackTrace();
                        }
                        builder.addFormDataPart("multipartFile", f.getName(), RequestBody.create(MEDIA_TYPE_PNG, f));
                    }
                }
    
                MultipartBody requesBody = builder.build();
    
                Request request = new Request.Builder()
                        .url(url)
                        .post(requesBody)
                        .build();
    
                client.newCall(request).enqueue(new Callback() {
    
                    @Override
                    public void onFailure(@NotNull Call call, @NotNull IOException e) {
                        Message message = myHandler.obtainMessage();
                        message.obj = "请求失败";
                        message.what = 0;
                        myHandler.sendMessage(message);
                    }
    
                    @Override
                    public void onResponse(@NotNull Call call, @NotNull Response response) throws IOException {
                        Message message = myHandler.obtainMessage();
                        String json = response.body().string();
                        message.obj = json;
                        message.what = 1;
                        myHandler.sendMessage(message);
                    }
                });
    
            } catch (Exception e) {
                e.printStackTrace();
            }
    
        }
    
    
        //使用接口回到，将数据返回
        public interface OKHttpGetListener {
            void error(String error);
    
            void success(String json);
        }
    
        //给外部调用的方法
        public void setOnOKHttpGetListener(OKHttpGetListener onOKHttpGetListener) {
            this.onOKHttpGetListener = onOKHttpGetListener;
        }
    
    
        //使用Handler，将数据在主线程返回
        class MyHandler extends Handler {
            @Override
            public void handleMessage(Message msg) {
                int w = msg.what;
                Log.d(TAG, "handleMessage() returned: " + msg);
                if (w == 0) {
                    String error = (String) msg.obj;
                    onOKHttpGetListener.error(error);
                }
                if (w == 1) {
                    String json = (String) msg.obj;
                    onOKHttpGetListener.success(json);
                }
            }
        }
    
    }

# 4.主线程中的 #

# MainActivity.java #

import androidx.appcompat.app.AppCompatActivity;
    
    import android.os.Bundle;
    import android.util.Log;
    import android.view.View;
    import android.widget.Button;
    import android.widget.Toast;
    
    import com.example.myapplication.movies.Music;
    import com.example.myapplication.weather.Weather;
    import com.google.gson.Gson;
    
    public class MainActivity extends AppCompatActivity {
    
        private Button b1;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
    
            b1 = findViewById(R.id.button);
            b1.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    OKHttpUitls okHttpUitls = new OKHttpUitls();
                    okHttpUitls.get("musicBroadcasting");
    //                okHttpUitls.get("http://47.100.104.187:8080/interface/hello");
                    okHttpUitls.setOnOKHttpGetListener(new OKHttpUitls.OKHttpGetListener() {
                        @Override
                        public void error(String error) {
                            Toast.makeText(MainActivity.this, "error", Toast.LENGTH_SHORT).show();
                            Log.d("Person", "-----error-----");
                        }
    
                        @Override
                        public void success(String json) {
                            Toast.makeText(MainActivity.this, json, Toast.LENGTH_SHORT).show();
                            System.out.println(json);
                            Gson gson = new Gson();
                            Music music = gson.fromJson(json, Music.class);
                            System.out.println(music);
                            Log.d("Person", music.toString());
                        }
                    });
                }
            });
    
        }
    }

首先找到关于免费的json接口

# [http://47.100.104.187:8080/interface/hello][http_47.100.104.187_8080_interface_hello] #

# [http://47.100.104.187:8080/interface/person][http_47.100.104.187_8080_interface_person] #

这个是我自己写的接口，针对http格式，

# 别人的文章免费json 接口 #

#  [https://blog.csdn.net/rosener/article/details/81699698][https_blog.csdn.net_rosener_article_details_81699698] #

多多点赞，谢谢各位看客老爷！！！！

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1amluZzFfMQ_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20191228150359976.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1amluZzFfMQ==,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1amluZzFfMQ_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20191111214511905.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1amluZzFfMQ==,size_16,color_FFFFFF,t_70
[http_47.100.104.187_8080_interface_hello]: http://47.100.104.187:8080/interface/hello
[http_47.100.104.187_8080_interface_person]: http://47.100.104.187:8080/interface/person
[https_blog.csdn.net_rosener_article_details_81699698]: https://blog.csdn.net/rosener/article/details/81699698