how to put the search box in the actionbar

main activity search.java

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    // ......
    // ......
    ActionBar actionBar = getSupportActionBar(); // you can use ABS or the non-bc ActionBar
    actionBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM | ActionBar.DISPLAY_USE_LOGO | ActionBar.DISPLAY_SHOW_HOME
            | ActionBar.DISPLAY_HOME_AS_UP); // what's mainly important here is DISPLAY_SHOW_CUSTOM. the rest is optional
    
    LayoutInflater inflater = (LayoutInflater)this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    // inflate the view that we created before
    View v = inflater.inflate(R.layout.actionbar_search, null);
    AutoCompleteTextView textView =  (AutoCompleteTextView) v.findViewById(R.id.search_box);

    textView.setAdapter(searchAdapter);

    textView.setOnItemClickListener(new AdapterView.OnItemClickListener() {

        @Override
    	public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            // do something when the user clicks
        }
    });
    actionBar.setCustomView(v);
}