Android访问php取回json数据实例

$array = array( 
'username'=>'杨铸', 
'password'=>'123456', 
'user_id'=>1 
); 
echo json_encode($array); 

private void startUrlCheck(String username,String password) 
{ 
HttpClient client = new DefaultHttpClient(); 
StringBuilder builder = new StringBuilder(); 
HttpGet myget = new HttpGet("http://10.0.2.2/Android/index.php"); 
try { 
HttpResponse response = client.execute(myget); 
BufferedReader reader = new BufferedReader(new InputStreamReader( 
response.getEntity().getContent())); 
for (String s = reader.readLine(); s != null; s = reader.readLine()) { 
builder.append(s); 
} 
JSONObject jsonObject = new JSONObject(builder.toString()); 
String re_username = jsonObject.getString("username"); 
String re_password = jsonObject.getString("password"); 
int re_user_id = jsonObject.getInt("user_id"); 
setTitle("用户id_"+re_user_id); 
Log.v("url response", "true="+re_username); 
Log.v("url response", "true="+re_password); 
} catch (Exception e) { 
Log.v("url response", "false"); 
e.printStackTrace(); 
} 
} 

其中http://10.0.2.2为Android访问本机url的ip地址。对应电脑上测试的http://127.0.0.1 
另外执行代码时会抛出异常 
java.net.SocketException: Permission denied 
此为应用访问网络的权限不足 在AndroidManifest.xml中，需要进行如下配置： 
<uses-permission Android:name="android.permission.INTERNET" /> 
就加在 
</manifest> 
之前就好了 
然后测试通过。