而不是 JSON 数据链接返回.txt文件如何在 android 中获取 JSON 数据

Question

当我在浏览器中打开该链接时，我正在使用该链接，它会生成一个 json.txt 文件并下载它。我想在安卓应用程序中获取这个 txt 文件，并希望从这个 txt 文件中获取 JSON 数据。

Answer 1

new DownloadFileFromURL().execute("your_file_downloadable_url");
class DownloadFileFromURL extends AsyncTask<String, String, String> {
    /**
     * Before starting background thread
     * */
    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        System.out.println("Starting download");

    }
    /**
     * Downloading file in background thread
     * */
    @Override
    protected String doInBackground(String... f_url) {
        int count;
        try {
            String root = Environment.getExternalStorageDirectory().toString();
            System.out.println("Downloading");
            URL url = new URL(f_url[0]);
            URLConnection conection = url.openConnection();
            conection.connect();
            // getting file length
            int lenghtOfFile = conection.getContentLength();
            // input stream to read file - with 8k buffer
            InputStream input = new BufferedInputStream(url.openStream(), 8192);
            // Output stream to write file
            OutputStream output = new FileOutputStream(root+"/downloadedfile.txt");
            byte data[] = new byte[1024];
            long total = 0;
            while ((count = input.read(data)) != -1) {
                total += count;
                // writing data to file
                output.write(data, 0, count);
            }
            // flushing output
            output.flush();
            // closing streams
            output.close();
            input.close();
        } catch (Exception e) {
            Log.e("Error: ", e.getMessage());
        }
        return null;
    }

    /**
     * After completing background task
     * **/
    @Override
    protected void onPostExecute(String file_url) {
        System.out.println("Downloaded");
        pDialog.dismiss();
    }
}