Android: how to resume main thread after download is finished

Question

What can I do, if I'm in any Activity and I want download a file (using thread) and at same time I want the main thread waits until download is finished?

Answer 1

Use AsyncTask.. from activity

new DownloadTask(this).execute();

The task for example:

public class DownloadTask extends AsyncTask<Void, Void, String>  {

private ProgressDialog progressDialog;  
private Context context;

/**
 * 
 * @param context
 * @param pdfDoc the document of the PDF
 */
public DownloadTask(Context context) {
    this.context = context;

    progressDialog = new ProgressDialog(context);
}

@Override
protected void onPreExecute() {  
        progressDialog.setMessage("Downloading...");
        progressDialog.setIndeterminate(true);
        progressDialog.show();
}

@Override
protected String doInBackground(Void... arg0) {
    //download here
}

@Override
protected void onPostExecute(final String result) {
        progressDialog.dismiss();

}
}