android开发中网络通讯必不可少，目前使用率较高的http框架有Okhttp、nohttp、volley等等，

下面做一个用户登陆的demo，说明一下Okhttp的用法，废话不多说，看代码。

LoginActivity.java

1 package com.junyi.shangqifixture; 2  3 import java.io.IOException; 4  5 import android.app.Activity; 6 import android.content.Intent; 7 import android.os.AsyncTask; 8 import android.os.Bundle; 9 import android.view.View;10 import android.view.View.OnClickListener;11 import android.widget.Button;12 import android.widget.EditText;13 import okhttp3.FormBody;14 import okhttp3.OkHttpClient;15 import okhttp3.Request;16 import okhttp3.RequestBody;17 import okhttp3.Response;18 19 public class LoginActivity extends Activity {20 21     private final OkHttpClient client = new OkHttpClient();22     private EditText editAccount,editPwd;23 24     @Override25     protected void onCreate(Bundle savedInstanceState) {26         // TODO Auto-generated method stub27         super.onCreate(savedInstanceState);28         setContentView(R.layout.activity_login);29 30         editAccount=(EditText)findViewById(R.id.accountEdittext);31         editPwd=(EditText)findViewById(R.id.pwdEdittext);32 33         Button btnLogin=(Button)findViewById(R.id.login_in);34         btnLogin.setOnClickListener(new OnClickListener() {35 36             @Override37             public void onClick(View arg0) {38                 // TODO Auto-generated method stub39                 new AnsyTry().execute(editAccount.getText().toString(),editPwd.getText().toString());40             }41         });42     }43 44     private class AnsyTry extends AsyncTask
     
      {45 46         @Override47         protected String doInBackground(String... params) {48             // TODO Auto-generated method stub49             try {50                 RequestBody formBody = new FormBody.Builder()51                         .add("account", params[0])52                         .add("pwd", params[1])53                         .build();54 55                 Request request = new Request.Builder()56                         .url("http://baidu.com")57                         .post(formBody)58                         .build();59 60                 Response response = client.newCall(request).execute();61                 if(response.isSuccessful()){62                     return response.body().string();63                 }64             } catch (IOException e) {65                 // TODO Auto-generated catch block66                 e.printStackTrace();67             }68             return null;69         }70 71         @Override72         protected void onPostExecute(String result) {73             // TODO Auto-generated method stub74             super.onPostExecute(result);75 76             //TODO 此处判断返回值77             78             Intent intent = new Intent();79             intent.setClass(LoginActivity.this, MainActivity.class);80             startActivity(intent);81             finish();82         }83     }84 }
     

activity_login.xml

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2016-05-31 14:52:30