Bad window token, you cannot show a dialog before an Activity is created or after it's hidden

Question

I am using an AppIntro library in my app.

It has 3 slides. I want to ask the user something when the third slide is shown. To achieve that I am using material dialogs b

Answer 1

MaterialDialog dialog = new MaterialDialog.Builder(getApplicationContext())

I suppose you need to pass the Activity instance here, not the application context.