Progressdialog Not Shown In Asynctask

I have a huge database (40MB) on an SDCard. I need fetch data, with LIKE in query, which is very slow. DB request takes about 5 seconds. Therefore, I need to do it asynchronously a

Solution 1:

I put the definition of the dialog into the AsyncTask Class and it works fine for me. Take a look at this exampel (You have to change NAMEOFCLASS in the name of your CLASS:

privateclassdoInBackgroundextendsAsyncTask<Integer, Integer, Void> {

   final ProgressDialog dialog = new ProgressDialog(NAMEOFCLASS.this) {

    @Override
    protectedvoidonPreExecute() {
        dialog.setCancelable(false);
        dialog.setTitle(getString(R.string.daten_wait_titel));
        dialog.setIcon(R.drawable.icon);
        dialog.setMessage(getString(R.string.dse_dialog_speichern));
        dialog.show();
    }

    @Override
    protectedvoidonCancelled() {
        dialog.cancel();
    }

....

@Override
    protected void onProgressUpdate(Integer... values) {
                   // DO YOUR UPDATE HERE
    }

    @Override
    protected void onPostExecute(Void result) {
        dialog.dismiss();
                }

}

Solution 2:

Maybe this SO answer could help you. It looks like similar problem. Try to use AsyncQueryHandler for querying your database

Solution 3:

declare you Dialog box on Class (Activity) level like this

privateProgressDialogdialog=null;

show the progress dialog and call the AsyncTask class when you want to start you Busy work..like onButton click or any

dialog = ProgressDialog.show(this,"Sending Email to your account please! wait...", true);
SendingEmailTasktask=newSendingEmailTask();
Strings="";
task.execute(s);

create your inner class like

privateclassSendingEmailTaskextendsAsyncTask<String, Void, String> {

    protectedStringdoInBackground(String... urls) {
         //do your work here..// like fetching the Data from DB or anyreturnnull;
       }

       @OverrideprotectedvoidonPostExecute(String str) {
           //hide progress dialog here
           dialog.dismiss();
       }
}

let me know if this help!!