Was bedeutet AdapterView<?> in der OnitemClick() Methode? Was bedeuten die anderen Parameter in der Methode?

Question

gridview.setOnItemClickListener(new OnItemClickListener() {
        public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
            Toast.makeText(HelloGridView.this, "" + position, Toast.LENGTH_SHORT).show();
        }
    });