Android异步线程OkHttp Post请求Json数据并解析

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package com.wpl.http;import android.os.AsyncTask;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.util.Log;import android.view.View;import android.widget.Button;import org.json.JSONException;import org.json.JSONObject;import java.io.IOException;import okhttp3.FormBody;import okhttp3.OkHttpClient;import okhttp3.Request;import okhttp3.RequestBody;import okhttp3.Response;public class MainActivity extends AppCompatActivity {    private Button btn1;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        initUI();    }    private void initUI() {        btn1 = (Button) findViewById(R.id.login);        btn1.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                login();            }        });    }    private void login() {        new GetDataTask().execute();    }    private class GetDataTask extends AsyncTask<Void, Void, String> {        @Override        protected String doInBackground(Void... params) {            String result = null;            OkHttpClient client = new OkHttpClient();            FormBody.Builder builder = new FormBody.Builder();            builder.add("name", "123");            builder.add("password", "123");            RequestBody body = builder.build();            Request request = new Request.Builder()                    .url("http://211.149.239.137:8080/user/loginPhone")                    .post(body)                    .build();            Response response = null;            try {                response = client.newCall(request).execute();                result = response.body().string();            } catch (IOException e) {                e.printStackTrace();            }            return result;        }        @Override        protected void onPostExecute(String s) {            Log.e("result", "" + s);            try {                JSONObject jsonObject = new JSONObject(s);                Log.e("key",""+jsonObject.get("key"));            } catch (JSONException e) {                e.printStackTrace();            }            super.onPostExecute(s);        }    }}
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