android - How to retain a dialog's opened state onRestoreInstanceState -


say i've opened dialog , turn phone sideways. want dialog remain open. how acheive that?

here's i've tried

dialog dialog; boolean dialogshown = false;  onclick:    dialog = new dialog(login.this, r.style.no_title_dialog);    dialog.show();    dialogshown = true;     dialogbutton.onclick:         //dostuff         dialog.dismiss();         dialogshown = false;

and 

@override protected void onsaveinstancestate(bundle outstate) {     super.onsaveinstancestate(outstate);     if(dialogshown) {         outstate.putboolean("dialogshown", true);     } }  @override protected void onrestoreinstancestate(bundle outstate) {     super.onrestoreinstancestate(outstate);     outstate.getboolean("dialogshown");     if(dialogshown){         dialog.show();     } }

but when turn phone sideways, nullpointer exception on row:

        dialog.show();

in onrestoreinstancestate, doesnt recognize dialog anymore?

you want have dialogshown = outstate.getboolean("dialogshown") key parameter getboolean() can string, it's not variable name.

stylistically, bundle should called instate in onrestoreinstancestate().

further, dialogfragments, 1 of problems they're supposed solve.


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