Error while placing a spinner inside Activity Group

Question

I have an activity group containing 3 activities. When a button is pressed, I enter into this activity group and show the 1st activity. From the 1st activity I can goto 2nd

Answer 1

The error was with the setContentView. I had given

setContentView(R.layout.mylayout);

Instead of that we should give,

View viewToLoad = LayoutInflater.from(this.getParent()).inflate(R.layout.mylayout, null);
this.setContentView(viewToLoad);  

And the spinner code is:

Spinner spinner = (Spinner) findViewById(R.id.spinner);

ArrayAdapter adapter = ArrayAdapter.createFromResource(
            this, R.array.request_options, android.R.layout.simple_spinner_item);
    adapter.setDropDownViewResource(android.R.layout.simple_spinner_item);
    spinner.setAdapter(adapter);