android okhttp+解析json( okhttp 工具类）
16lz
2021-01-26
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。
我选择的免费的接口
https://api.apiopen.top/musicBroadcastingjson格式比较复杂，所以实体类较多
下面是项目结构
1.在AndroidManifest.xml中添加网络请求权限
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; @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 getResult() { return result; } public void setResult(List result) { this.result = result; }} Result类
import java.util.List;public class Result { private List channellist; private String title; private String cid; @Override public String toString() { return "Result{" + "channellist=" + channellist + ", title='" + title + '\'' + ", cid='" + cid + '\'' + '}'; } public List getChannellist() { return channellist; } public void setChannellist(List 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 params) { try { if (client == null) { client = new OkHttpClient(); } url=BaseUrl+url; FormBody.Builder builder = new FormBody.Builder(); if (params != null) { for (Map.Entry 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 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() { 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 photoPath, Map 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 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/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
多多点赞，谢谢各位看客老爷！！！！
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