android - How can I programmatically make sure a user has selected an option with AlertDialog.Builder? -

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in android application, have created dialog box showing user multiple options list.

i have used class so: http://developer.android.com/reference/android/app/alertdialog.builder.html

more specifically, used setmultichoiceitems

now options displaying correctly , works well. however, need make sure user has selected 1 of these options , not pressed proceeding button have set using setpositivebutton.

is there way can programmatically make sure 1 or more of these options picked? set quick if statement , display warning dialog if none of options picked.

thank , apologize if question has been asked before.

the easiest way use dialoginterface.onmultichoiceclicklistener keep track of user's selections. initialize array before create dialog , every time user makes/clears selection add/remove array. once user hits positive button check if array empty: if is, made no selections.


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