DialogFragment.dismiss crashing with NullPointerException

Question

I\'m doing some background work and showing a DialogFragment while I do that. Once my work is done and the relevant callback is invoked, I dismiss the dialog. When I do, I get a

Answer 1

Checking if it's Visible before dimissing could avoid this null pointer exception

    if (mDialog != null && mDialog.isVisible) {
        mDialog.dismiss();
        mDialog = null;
    }