How to return a value from a inner class?

Question

My code is here:

public static boolean showConfirmationDialog(Context context, String title, String dialogContent) {
        AlertDialog.Builder builder = new AlertDialog.Builder(context);
        builder.setIcon(android.R.drawable.ic_dialog_alert);
        builder.setTitle(title);
        builder.setMessage(dialogContent);
        builder.setPositiveButton("Confirm", new OnClickListener() {

            @Override
            public void onClick(DialogInterface dialog, int which) {
                // what to do ?
            }
        });

right now, I want to return true after I clicked the "confirm" button. so how do I return "true" from a inner class - OnClickListener for the method.

Need some help, thanks.

Answer 1

You can't return things from an inner class in this instance. In this case it doesn't make much sense. Is the program supposed to wait inside your onClick function until it returns something? That's not really how listeners work. What you need to do is take what ever code you plan on executing if "true" was returned, and put it inside your inner class.

Answer 2

OnClickListeners dont return values. Without knowing what exactly you need to do when the click listener fires I cant give you any specifics but

private boolean classBoolean = false;
public static boolean showConfirmationDialog(Context context, String title, String    dialogContent) {

    //local variables must be declared final to access in an inner anonymous class
    final boolean localBoolean = false;

    AlertDialog.Builder builder = new AlertDialog.Builder(context);
    builder.setIcon(android.R.drawable.ic_dialog_alert);
    builder.setTitle(title);
    builder.setMessage(dialogContent);
    builder.setPositiveButton("Confirm", new OnClickListener() {

        @Override
        public void onClick(DialogInterface dialog, int which) {
            // what to do ?
            //you can't change a local var since to access it it needs to be final
            //localBoolean = true; can't do this
            //so you can change a class var
            classBoolean = true;
            //or you can also call some method to do something
            someMethod();
        }
    });