Android开发中使用Gson解析OkHttp传回来的复杂json数据

在学习Android的过程中总是会遇见很多坑，看过很多书籍、查过很多资料发现还是不太实用，现在把自己写的实现方式贴出来供大家参考：

activity_ok_http3.xml：

    android:id="@+id/button1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="Button1" />

OkHttp3Activity.java：

package com.example.administrator.fromnew;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;

import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;

import java.lang.reflect.Type;
import java.util.Iterator;
import java.util.LinkedList;

import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;

public class OkHttp3Activity extends AppCompatActivity {
    Button button1;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_ok_http3);
        button1 = findViewById(R.id.button1);
        button1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //核心代码
                sendRequestWithOkHttp();
            }
        });
    }

    //核心代码
    private void sendRequestWithOkHttp(){
        new Thread(new Runnable(){
            @Override
            public void run(){
                try{
                    OkHttpClient client = new OkHttpClient();
                    Request request = new Request.Builder()
                            //要在服务器环境下运行data.json
                            .url("http://localhost:8080/Android/json/data.json")
                            .build();
                    Response response = client.newCall(request).execute();
                    String responseData = response.body().string();
                    parseJsonWithGson(responseData);
                }catch (Exception e){
                    e.printStackTrace();
                }
            }
        }).start();
    }

    //核心代码
    private void parseJsonWithGson(String jsonData){
        Type type = new TypeToken>(){}.getType();
        Gson gson = new Gson();
        LinkedList users = gson.fromJson(jsonData, type);
        for(Iterator iterator = users.iterator(); iterator.hasNext();){
            User_json user = (User_json)iterator.next();
            Log.v("Gson","username:" + user.getUsername() + "id:" + user.getUserId());
        }
    }
}

 data.json内容如下：

[{"username":"小王","userid":01},
{"username":"小李","userid":02},

{"username":"小陈","userid":03}]

GitHub地址为：https://github.com/samveduan/FromNew