利用okhttp3调用接口，用gson解析json数据

package ink.cik.logininfoapp;

import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

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

import java.io.IOException;
import java.util.List;
import java.util.Map;

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

public class MainActivity extends AppCompatActivity {
    private final Gson gson = new Gson();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Button button = (Button) findViewById(R.id.loginButton);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                EditText userName = findViewById(R.id.userName);
                EditText passWord = findViewById(R.id.passWord);
                Toast.makeText(MainActivity.this, userName.toString(), Toast.LENGTH_SHORT).show();
                verLogin();
            }
        });
    }

    private void verLogin() {
        new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    OkHttpClient client = new OkHttpClient();
                    Request request = new Request.Builder().url("https://api.565.ink/login/getAll?passwd=lanol666").build();
                    Response response = client.newCall(request).execute();
                    String responsedata = response.body().string();
                    Log.d("返回数据：", responsedata);
                    parseJson(responsedata);
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }).start();
    }

    private void parseJson(String JsonData) {
        Gson gson = new Gson();
        List<userInfo> userInfoList = gson.fromJson(JsonData, new TypeToken<List<userInfo>>() {
        }.getType());
        for (userInfo userInfo : userInfoList) {
            Log.d("信息：", userInfo.getUserName());
        }
    }
}

package ink.cik.logininfoapp;

public class userInfo {
    private int id;
    private String userName;
    private String passWord;
    private String nation;
    private int age;
    private String tel;

    public int getAge() {
        return age;
    }

    public String getNation() {
        return nation;
    }

    public int getId() {
        return id;
    }

    public String getPassWord() {
        return passWord;
    }

    public String getTel() {
        return tel;
    }

    public String getUserName() {
        return userName;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public void setId(int id) {
        this.id = id;
    }

    public void setNation(String nation) {
        this.nation = nation;
    }

    public void setPassWord(String passWord) {
        this.passWord = passWord;
    }

    public void setTel(String tel) {
        this.tel = tel;
    }

    public void setUserName(String userName) {
        this.userName = userName;
    }
}