handle button clicks in a DialogFragment

Question

I have Fragment that extends DialogFragment and I have a custom layout for it which contains two edittexts and two buttons - ok and cancel. My dialog displays just fine, using the onCreateView method for specifying the layout, but I don't know how to handle button clicks. Inside the onCreateView method, button.setOnClickListener doesn't work. This may have a simple solution, but I am stuck for several hours. I would very much appreciate an advice or example code.

P.S I don't want to use AlertDialog, because in this case when clicking on the ok button, the dialog automatically dismisses itself, and I can't do a validation on the edittext's (example: when the user presses ok button and the edittext's are empty I don't want the dialog to disappear). That is way I went with the option for creating a custom dialog and easily manage the buttons behavior.

Answer 1

This is the code for a Dialog I'm using (the actual GUI for the dialog is defined in the layout resource confirm_dialog.xml):

public class ConfirmDialog extends DialogFragment {

    public static String TAG = "Confirm Dialog";

    public interface ConfirmDialogCompliant {
        public void doOkConfirmClick();
        public void doCancelConfirmClick();
    }

    private ConfirmDialogCompliant caller;
    private String message;

    public ConfirmDialog(ConfirmDialogCompliant caller, String message){
        super();
        this.caller = caller;
        this.message = message;
    }

    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        final View view = inflater.inflate(R.layout.confirm_dialog, container, false);
        getDialog().requestWindowFeature(Window.FEATURE_NO_TITLE);
        ((TextView) view.findViewById(R.id.textview_confirm)).setText(message);
        ((Button) view.findViewById(R.id.ok_confirm_button)).setOnClickListener(new OnClickListener() {
            public void onClick(View v) {
                // When button is clicked, call up to owning activity.
                caller.doOkConfirmClick();
            }
        });
        ((Button) view.findViewById(R.id.cancel_confirm_button)).setOnClickListener(new OnClickListener() {
            public void onClick(View v) {
                // When button is clicked, call up to owning activity.
                caller.doCancelConfirmClick();
            }
        });
        return view;
    }

}

The dialog is created with the following lines

confirm_dialog = new ConfirmDialog(this, message);
confirm_dialog.show(getActivity().getSupportFragmentManager(), ConfirmDialog.TAG);

The interface definition is used to assure that the caller (Fragment or Activity) implements the methods to handle the events thrown by the controller. That is, a Fragment or Activity calling this dialog must implement the given interface.
Maybe there is a better solution but this is the one I figured out. Hope it helps!