Question

why it is not showing me a messageboxdialog when the Service is being activated.

@Override
public void onStart(Intent intent, int startid) {
    Toast.makeText(this, "My Service Started", Toast.LENGTH_LONG).show();
    Log.d(TAG, "onStart");
    player.start();

    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setMessage("Are you sure you want to exit?")
           .setCancelable(false)
           .setPositiveButton("Yes", new DialogInterface.OnClickListener() {
               public void onClick(DialogInterface dialog, int id) {
                    AlarmService.this.onDestroy();
               }
           })
           .setNegativeButton("No", new DialogInterface.OnClickListener() {
               public void onClick(DialogInterface dialog, int id) {
                    dialog.cancel();
               }
           });


}

The Toast is appearing the sound is being played only the showdialog is not comming, why ?

Answer 1

You need to call builder.create() to create your AlertDialog, then show() on the dialog to display it.

However, if this is a Service, you won’t be able to display the dialog directly. Have a look at this question for how to show a Dialog from within a Service: Alert dialog from Android service