（一）Android OkHttp 用户登陆demo

 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     @Override
25     protected void onCreate(Bundle savedInstanceState) {
26         // TODO Auto-generated method stub
27         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             @Override
37             public void onClick(View arg0) {
38                 // TODO Auto-generated method stub
39                 new AnsyTry().execute(editAccount.getText().toString(),editPwd.getText().toString());
40             }
41         });
42     }
43 
44     private class AnsyTry extends AsyncTask<String, Integer, String>{
45 
46         @Override
47         protected String doInBackground(String... params) {
48             // TODO Auto-generated method stub
49             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 block
66                 e.printStackTrace();
67             }
68             return null;
69         }
70 
71         @Override
72         protected void onPostExecute(String result) {
73             // TODO Auto-generated method stub
74             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 }

  1 <?xml version="1.0" encoding="utf-8"?>
  2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  3     android:layout_width="fill_parent"
  4     android:layout_height="fill_parent"
  5     android:background="@drawable/bkcolor"
  6     android:orientation="vertical" >
  7 
  8     <ImageView
  9         android:id="@+id/iv1"
 10         android:layout_width="match_parent"
 11         android:layout_height="wrap_content"
 12         android:layout_gravity="center"
 13         android:layout_marginTop="20dp"
 14         android:src="@drawable/head" />
 15 
 16     <RelativeLayout
 17         android:id="@+id/editRel"
 18         android:layout_width="fill_parent"
 19         android:layout_height="wrap_content"
 20         android:layout_marginTop="20dp" >
 21 
 22         <RelativeLayout
 23             android:id="@+id/accountRel"
 24             android:layout_width="fill_parent"
 25             android:layout_height="wrap_content"
 26             android:layout_marginTop="14dp"
 27             android:background="@drawable/preference_first_item"
 28             android:clickable="true"
 29             android:gravity="center_vertical" >
 30 
 31             <TextView
 32                 android:id="@+id/account"
 33                 android:layout_width="wrap_content"
 34                 android:layout_height="wrap_content"
 35                 android:padding="8dp"
 36                 android:text="@string/account"
 37                 android:textColor="#000"
 38                 android:textSize="17sp" />
 39 
 40             <EditText
 41                 android:id="@+id/accountEdittext"
 42                 android:layout_width="fill_parent"
 43                 android:layout_height="wrap_content"
 44                 android:layout_centerVertical="true"
 45                 android:layout_marginLeft="20dip"
 46                 android:layout_toRightOf="@id/account"
 47                 android:background="@null"
 48                 android:hint="@string/account"
 49                 android:text="test"
 50                 android:textSize="15sp" />
 51         </RelativeLayout>
 52 
 53         <RelativeLayout
 54             android:id="@+id/pwdRel"
 55             android:layout_width="fill_parent"
 56             android:layout_height="wrap_content"
 57             android:layout_below="@id/accountRel"
 58             android:background="@drawable/preference_last_item"
 59             android:clickable="true"
 60             android:gravity="center_vertical" >
 61 
 62             <TextView
 63                 android:id="@+id/pwd"
 64                 android:layout_width="wrap_content"
 65                 android:layout_height="wrap_content"
 66                 android:padding="8dp"
 67                 android:text="@string/pwd"
 68                 android:textColor="#000"
 69                 android:textSize="17sp" />
 70 
 71             <EditText
 72                 android:id="@+id/pwdEdittext"
 73                 android:layout_width="fill_parent"
 74                 android:layout_height="wrap_content"
 75                 android:layout_centerVertical="true"
 76                 android:layout_marginLeft="20dip"
 77                 android:layout_toRightOf="@id/pwd"
 78                 android:background="@null"
 79                 android:hint="@string/pwd"
 80                 android:text="test"
 81                 android:inputType="textPassword"
 82                 android:textSize="15sp" />
 83         </RelativeLayout>
 84     </RelativeLayout>
 85 
 86     <Button
 87         android:id="@+id/login_in"
 88         style="@style/common_button_style"
 89         android:layout_margin="10dp"
 90         android:text="@string/login_in" />
 91 
 92     <TextView
 93         android:id="@+id/sound_help"
 94         android:layout_width="wrap_content"
 95         android:layout_height="wrap_content"
 96         android:layout_marginLeft="15dip"
 97         android:layout_marginTop="10dip"
 98         android:text="@string/forget_pwd"
 99         android:textColor="#29981A" />
100 
101 </LinearLayout>