How to convert this code that use deprecated methods?

问题

I'm using for my first time an AsyncTask class as inner class in my main activity class. Here is the code:

    // Async Task Class
    class fetchdata extends AsyncTask<String, String, String> {

        // Show Progress bar before downloading file
        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            // Shows Progress Bar Dialog and then call doInBackground method
            showDialog(progress_bar_type);
        }

        // Download File from Internet
        @Override
        protected String doInBackground(String... f_url) {
            int count;
            try {
                URL url = new URL(f_url[0]);
                URLConnection conection = url.openConnection();
                conection.connect();
                // Get Music file length
                int lenghtOfFile = conection.getContentLength();
                // input stream to read file - with 8k buffer
                InputStream input = new BufferedInputStream(url.openStream(),10*1024);
                // Output stream to write file in SD card
                OutputStream output = new FileOutputStream(Environment.getExternalStorageDirectory().getPath()+"/jai_ho.mp3");
                byte data[] = new byte[1024];
                long total = 0;
                while ((count = input.read(data)) != -1) {
                    total += count;
                    // Publish the progress which triggers onProgressUpdate method
                    publishProgress("" + (int) ((total * 100) / lenghtOfFile));

                    // Write data to file
                    output.write(data, 0, count);
                }
                // Flush output
                output.flush();
                // Close streams
                output.close();
                input.close();
            } catch (Exception e) {
                Log.e("Error: ", e.getMessage());
            }
            return null;
        }

        // While Downloading File
        protected void onProgressUpdate(String... progress) {
            // Set progress percentage
            prgDialog.setProgress(Integer.parseInt(progress[0]));
        }

        // Once File is downloaded
        @Override
        protected void onPostExecute(String file_url) {
            // Dismiss the dialog after the file was downloaded
            dismissDialog(progress_bar_type);
            Toast.makeText(getApplicationContext(), "Download complete", Toast.LENGTH_LONG).show();
            // Play the music
        }
    }

Eclipse tell me that showDialog and dismissDialog methods are deprecated. How to change my code using DialogFragment class with FragmentManager?

回答1:

Make changes (eg. parameters, return types) as you require to structure :

private class getData extends AsyncTask<Void, Void, Void> {

@Override
protected void onPreExecute() {
    super.onPreExecute();
    // Showing progress dialog
    progressDialog = new ProgressDialog(activityName.this);//getApplicationContext()
    progressDialog.setMessage("Please wait...");
    progressDialog.setCancelable(false);
    progressDialog.show();

}

@Override
protected Void doInBackground(Void... arg0) {   
    // Making a request to url and getting response

    return null;
}

@Override
protected void onPostExecute(Void result) {
    super.onPostExecute(result);
    // Dismiss the progress dialog
    if (progressDialog.isShowing())
        progressDialog.dismiss();
    /**
     * To do code
     * */

    }
}

Add following line after your main class starts:

private ProgressDialog processDialog;

来源：https://stackoverflow.com/questions/25259970/how-to-convert-this-code-that-use-deprecated-methods

标签

android

android-asynctask

deprecated

showdialog