Show default value in Spinner in android

Spinner sp = (Spinner)findViewById(R.id.spinner); 
sp.setSelection(pos);

here pos is integer (your array item position)

array is like below then pos = 0;

String str[] = new String{"Select Gender","male", "female" };

then in onItemSelected

@Override
    public void onItemSelected(AdapterView<?> main, View view, int position,
            long Id) {

        if(position > 0){
          // get spinner value
        }else{
          // show toast select gender
        }

    }