如何从android中的数组中获取值？

Question

我正在构建一个 Android 应用程序，用户在其中输入一个值，例如 name 和 emailId，这个值被解析为一个 URL，作为响应我得到 作为该用户的主键的用户 ID。

我以带有成功消息的数组形式获得 ID。喜欢 这个 - {"message" : "succefull", "userID":"34341390ssvjsv"}.

现在我需要将此用户 ID 保存在该数组中的字符串中。

如何将这个ID“34341390ssvjsv”存储在字符串中？

这里是代码 -

private class DownloadJSON extends AsyncTask<String, String, String> {

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        // Create a progressdialog

    }

    @Override
    protected String doInBackground(String... params) {

        InputStream inputStream = null;
        String result = "";

        // Create an array
        // public String postData() {
        HttpClient httpclient = new DefaultHttpClient();
        String URl = "http://url/api/user";
        HttpPost httppost = new HttpPost(URl);
        try {
            // Add your data
            List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(
                    3);
            nameValuePairs.add(new BasicNameValuePair("name", name));
            nameValuePairs.add(new BasicNameValuePair("email", email));
            httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));

            // Execute HTTP Post Request
            HttpResponse response = httpclient.execute(httppost);
            inputStream  = response.getEntity().getContent();

            if(inputStream != null)
                result = convertInputStreamToString(inputStream);

            else
                result = "Did not work!";

        } catch (Exception e) {
            Log.d("InputStream", e.getLocalizedMessage());
        }

            return result;

    }


     private String convertInputStreamToString(InputStream inputStream) throws IOException{
            BufferedReader bufferedReader = new BufferedReader( new    
         InputStreamReader(inputStream));
            String line = "";
            String result = "";
            while((line = bufferedReader.readLine()) != null)
                result += line;

            inputStream.close();
            return result;

        }   



    @Override
    protected void onPostExecute(String result) {
         Toast.makeText(getApplicationContext(), result,
                   Toast.LENGTH_LONG).show();

    }
}

在上面关于 toast 结果的代码中，我得到 {"message" : "succefull", "userID":"34341390ssvjsv"}

Answer 1

您可以使用此代码 - String re = result.substring(37,3);