Android: “BadTokenException: Unable to add window; is your activity running?” at showing dialog in PreferenceActivity

Question

I\'d like to ask for some help: In my app, I have only one activity, a PreferenceActivity (don\'t need other, it\'s just a simple background-sync app, so the

Answer 1

This is usually caused by your app trying to display a dialog using a previously-finished Activity as a context. Then check that the activity is not closed by some other apps or other triggers before showing the dialog

if (!isFinishing()) {
    //showdialog here
    }