DialogFragment with negative button

Question

I want to make an About dialog in my app, and I want it to have the default dialog's button, and I decided to use DialogFragment, so I made it like this

public class AboutDialog extends DialogFragment {

public AboutDialog() {
    // Empty constructor for fragment
}

@Override
@NonNull
public Dialog onCreateDialog(Bundle savedInstanceState) {
    AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
    builder.setTitle("About");
    builder.setNegativeButton("Close", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int which) {
            dismiss();
        }
    });
    return builder.create();
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.about_dialog, container);
    getDialog().setTitle(getString(R.string.action_about));
    return rootView;
}

}

then call it from the Activity like this

AboutDialog about = new AboutDialog();
        about.show(getSupportFragmentManager(), null);

and then I get this error

android.util.AndroidRuntimeException: requestFeature() must be called before adding content

How do I fix this?

Answer 1

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
    // Use the Builder class for convenient dialog construction
    AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
    LayoutInflater inflater = getActivity().getLayoutInflater();
    builder.setView(inflater.inflate(R.layout.about_dialog, null));
    builder.setMessage("Test")
           .setPositiveButton("fire", new DialogInterface.OnClickListener() {
               public void onClick(DialogInterface dialog, int id) {
                   // FIRE ZE MISSILES!
               }
           })
           .setNegativeButton("cancel", new DialogInterface.OnClickListener() {
               public void onClick(DialogInterface dialog, int id) {
                   // User cancelled the dialog
               }
           });
    // Create the AlertDialog object and return it
    return builder.create();
}

remove your onCreateView