获取服务端数据

public void  okHttp(){
        new Thread(){
            @Override
            public void run() {
               /* try {
                    client=new OkHttpClient();
                    request = new Request.Builder()
                            .url("http://192.168.2.5:8080/transportservice/type/jason/action/GetCarAccountBalance.do")
                            .build();

                    client.newCall(request).execute().;
                    String responseData= response.body().string();
                    parsejson(responseData);
                } catch (Exception e) {
                    e.printStackTrace();
                }*/
               //传的参数
               String jsonCar = "";
                JSONObject jsonObject = new JSONObject();
                try {
                    jsonObject.put("CarId",4);
                    jsonCar = jsonObject.toString();
                } catch (JSONException e) {
                    e.printStackTrace();
                }

                String url = "http://192.168.2.5:8080/transportservice/type/jason/action/GetCarAccountBalance.do";
                RequestBody requestBody = RequestBody.create(MediaType.parse("application/json;charset=utf8"),jsonCar);  //RequestBody.create(MediaType.parse("application/json; charset=utf-8"), jsonCar);
                Request request = new Request.Builder().url(url).post(requestBody).build();
                client=new OkHttpClient();

package mad.com.its02.fragment;


import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;

import mad.com.its02.MainActivity;
import mad.com.its02.R;
import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.MediaType;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;




import static okhttp3.RequestBody.*;

/**
 * A simple {@link Fragment} subclass.
 */
public class PayFragment extends Fragment {
private Button chongzhi;
private Button check;
private SimpleDateFormat sm;
private EditText et_chongzhi;
private TextView balance;
 private AlertDialog.Builder dialog=null;
 private OkHttpClient client;
    private Request request;
    private Response response;
    private JSONObject jsonObject;
    private JSONArray jsonArray;
    private Handler handler=new Handler(){
        @Override
        public void handleMessage(Message msg) {
            String data= (String) msg.obj;
            int i = Integer.parseInt(data);
            balance.setText(i);
            super.handleMessage(msg);
        }
    };


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {

        return inflater.inflate(R.layout.fragment_pay, container, false);
    }
    @Override
    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
      chongzhi= (Button) getActivity().findViewById(R.id.chongzhi);
      balance= (TextView) getActivity().findViewById(R.id.balance);
     check= (Button) getActivity().findViewById(R.id.check);
        sm=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
         et_chongzhi= (EditText) getActivity().findViewById(R.id.et_chongzhi);
        chongzhi.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                dialog=new AlertDialog.Builder(getContext());
                dialog.setTitle("账户充值");
                dialog.setMessage("充值金额为："+et_chongzhi.getText().toString()+"元,现在是北京时间"+sm.format(new Date()));
                dialog.setPositiveButton("确定", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        Toast.makeText(getContext(),"充值成功",Toast.LENGTH_SHORT).show();
                    }
                });
                dialog.setNegativeButton("取消", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface d, int which) {
                        dialog=new AlertDialog.Builder(getContext());
                        dialog.setTitle("提示");
                        dialog.setMessage("请问你真的要取消充值吗，可能会影响你的正常使用？");
                        dialog.setNegativeButton("确定", new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {

                            }
                        });
                        dialog.setPositiveButton("取消", new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {

                            }
                        });dialog.show();
                    }
                });
                dialog.show();
            }
        });
            check.setOnClickListener(new View.OnClickListener() {

                @Override
                public void onClick(View v) {
                    if (v.getId()==R.id.check){
                        okHttp();
                    }
                }
            });
    }
    //从服务端获取json数据

 public void  okHttp(){
        new Thread(){
            @Override
            public void run() {
               /* try {
                    client=new OkHttpClient();
                    request = new Request.Builder()
                            .url("http://192.168.2.5:8080/transportservice/type/jason/action/GetCarAccountBalance.do")
                            .build();

                    client.newCall(request).execute().;
                    String responseData= response.body().string();
                    parsejson(responseData);
                } catch (Exception e) {
                    e.printStackTrace();
                }*/
               //传的参数
               String jsonCar = "";
                JSONObject jsonObject = new JSONObject();
                try {
                    jsonObject.put("CarId",4);
                    jsonCar = jsonObject.toString();
                } catch (JSONException e) {
                    e.printStackTrace();
                }

                String url = "http://192.168.2.5:8080/transportservice/type/jason/action/GetCarAccountBalance.do";
                RequestBody requestBody = RequestBody.create(MediaType.parse("application/json;charset=utf8"),jsonCar);  //RequestBody.create(MediaType.parse("application/json; charset=utf-8"), jsonCar);
                Request request = new Request.Builder().url(url).post(requestBody).build();
                client=new OkHttpClient();
                client.newCall(request).enqueue(new Callback() {
                    @Override
                    public void onFailure(Call call, IOException e) {
                        System.out.println("联网失败");
                    }

                    @Override
                    public void onResponse(Call call, Response response) throws IOException {
                        String s = response.body().string();
                        try {
                            JSONObject object = new JSONObject(s);
                            String serverinfo = object.getString("serverinfo");
                            JSONObject jsonObject1 = new JSONObject(serverinfo);
                            int balance = jsonObject1.getInt("Balance");
                            Message msg=new Message();
                            msg.obj=balance;
                            handler.sendMessage(msg);

                        } catch (JSONException e) {
                            e.printStackTrace();
                        }
                    }
                });

            }
        }.start();
    }
//解析jsonshuju
   /* private void parsejson(String jsonData ) {

            try {
                JSONObject jsonObject = new JSONObject(jsonData);
                String serverinfo = jsonObject.getString("serverinfo");
                JSONObject jsonObject1 = new JSONObject(serverinfo);
                Object o = jsonObject.get(String.valueOf(jsonObject1));
                Message msg=new Message();
                msg.obj=o;

            } catch (JSONException e1) {
                e1.printStackTrace();
            }
        }*/
    }