Question

我正在制作一个需要HttpURLConnection的应用。我在模拟器和我的

上测试了它

Optimus S版本2.3.3但是当我在Galaxy S3版本4.1.2上测试它时会自动失败。 LogCat不会显示任何错误。所以我想知道为什么它在Galaxy S3上失败了。

Http Setup

System.setProperty("http.keepAlive", "false");
                    URL check_url = new URL("http://www.website.com");
HttpURLConnection http = (HttpURLConnection) check_url.openConnection();
                        http.setConnectTimeout(3000);
                        http.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.1.2) Gecko/20090729 Firefox/3.5.2 (.NET CLR 3.5.30729)");
                        http.setRequestMethod("GET");
                        http.connect();

Answer 1

某些Android版本（我不知道）需要AsyncTask来建立HTTP连接，因此您必须将代码放在这样的后台线程中。

public void makeSingUp(){
    new AsyncTask<Void, Void, Boolean>(){
        @Override
        protected Boolean doInBackground(Void... params){
           //Your code connection
           return true;
        }
        @Override
        public void onPostExecute(Boolean result){
            //Some message that indicates the connection was finished, or nothing.
        }
    }.execute();
}

Answer 2

下载volley lib并添加到您的项目中。教程[link]：http://www.androidhive.info/2014/05/android-working-with-volley-library-1/ public class send_data extends AsyncTask { protected void onPreExecute（）{ super.onPreExecute（）; mProgressDialog = new ProgressDialog（main.this）; mProgressDialog.setCancelable（假）; mProgressDialog.setTitle（“请稍等......”）; mProgressDialog.show（）; } protected String doInBackground（String ... args）{

    String url = "http://your_url";
    try {
        ArrayList<BasicNameValuePair> nvp = new ArrayList<BasicNameValuePair>(
                1);
        nvp.add(new BasicNameValuePair("key for your data","yourdata"));


        String str_responsebody = obj_service.executer(url, nvp);
        Log.i("responce", str_responsebody + "===");
        return str_responsebody;

    } catch (Exception e) {

        Log.i("error1", "" + e.toString());
        return null;
    }

}

protected void onPostExecute(String result) {

    super.onPostExecute(result);



    try {

        Log.i("result", result);
            mProgressDialog.dismiss();


            }


    } catch (Exception e) {
        Log.e("error2", "" + e.toString());
        e.printStackTrace();
        mProgressDialog.dismiss();
    }
}

}

HttpUrlConnection无法在Galaxy S3上运行

2 个答案: