Android开发中使用AsyncHttpClient框架怎么更新后台json数据

public void getWeiXinInfo(String code) {
Log.d("gaolei", "getWeiXinOpenId------------------------");
String getWeiXinOpenIdUrl = "https://api.weixin.qq.com/sns/oauth2/access_token?"
+ "appid="+ Constant.WEIXIN_APP_ID
+ "&secret="+ Constant.WEIXIN_APP_SECRET
+ "&code="+ code
+ "&grant_type=authorization_code";
new AsyncHttpClient().get(getWeiXinOpenIdUrl,
new AsyncHttpResponseHandler() {
@Override
public void onSuccess(int statusCode, Header[] headers,
byte[] responseBody) {
// TODO Auto-generated method stub
String result = new String(responseBody);
Log.d("gaolei","result----------getWeiXinOpenId------------"+ result);
try {
JSONObject object=new JSONObject (result);
String openId=object.getString("openid");
String accessToken=object.getString("access_token");
Log.d("gaolei", "WeiXinLogin,openId:"+openId+",accessToken:"+accessToken);
Toast.makeText(context, result, Toast.LENGTH_SHORT).show();
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

@Override
public void onFailure(int arg0, Header[] arg1, byte[] arg2,
Throwable arg3) {
// TODO Auto-generated method stub
Log.d("gaolei","result---------------------failure------------");
}
});
}