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

Use "this" instead of "getApplicationContext()" if this error happening even inside the activity.

    mProgress = new MaterialDialog.Builder(this)