Android訪問php取回json數據

PHP代碼：

$array = array(
  'username'=>'楊鑄',
  'password'=>'123456',
  'user_id'=>1
);
echo json_encode($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("用戶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();
}

}</pre>其中http://10.0.2.2為Android訪問本機url的ip地址。對應電腦上測試的http://127.0.0.1 另外執行代碼時會拋出異常 java.net.SocketException: Permission denied 此為應用訪問網絡的權限不足 在AndroidManifest.xml中，需要進行如下配置： 
  <uses-permission android:name="android.permission.INTERNET">
    就加在 之前就好了然后測試通過。 
  </uses-permission>