android-async-http json字符串提交到服務器

private static AsyncHttpClient client = new AsyncHttpClient();
public static void postJSON(Activity activity, String url ,  StringEntity stringEntity, AsyncHttpResponseHandler responseHandler) {
    client.addHeader("Content-Type", "charset=utf-8");
    client.post(activity , url, stringEntity , "application/json" , responseHandler);
}

如果要用android-async-http提交json字符串到服務器，就用StringEntity類，使用方法如上所示。