actionbarsherlock - Android: Enable suggestions programmatically on a SearchView -

hello i'm using example provided actionbarsherlock 4.3.1 demo. want set search view in order show suggestions when there 0 characters inserted , let suggestions disappear when user write something. how can this? thanks

package com.actionbarsherlock.sample.demos;  import android.app.searchmanager; import android.content.context; import android.database.cursor; import android.database.matrixcursor; import android.os.bundle; import android.provider.basecolumns; import android.support.v4.widget.cursoradapter; import android.view.layoutinflater; import android.view.view; import android.view.viewgroup; import android.widget.textview; import android.widget.toast;  import com.actionbarsherlock.app.sherlockactivity; import com.actionbarsherlock.view.menu; import com.actionbarsherlock.view.menuitem; import com.actionbarsherlock.widget.searchview;  public class searchviews extends sherlockactivity implements searchview.onquerytextlistener,     searchview.onsuggestionlistener {  private static final string[] columns = {         basecolumns._id,         searchmanager.suggest_column_text_1, };  private suggestionsadapter msuggestionsadapter;  @override public boolean oncreateoptionsmenu(menu menu) {     //used put dark icons on light action bar     boolean islight = samplelist.theme == r.style.theme_sherlock_light;      //create search view     searchview searchview = new searchview(getsupportactionbar().getthemedcontext());     searchview.setqueryhint("search countries…");     searchview.setonquerytextlistener(this);     searchview.setonsuggestionlistener(this);      if (msuggestionsadapter == null) {         matrixcursor cursor = new matrixcursor(columns);         cursor.addrow(new string[]{"1", "'murica"});         cursor.addrow(new string[]{"2", "canada"});         cursor.addrow(new string[]{"3", "denmark"});         msuggestionsadapter = new suggestionsadapter(getsupportactionbar().getthemedcontext(), cursor);     }      searchview.setsuggestionsadapter(msuggestionsadapter);      menu.add("search")         .seticon(islight ? r.drawable.ic_search_inverse : r.drawable.abs__ic_search)         .setactionview(searchview)         .setshowasaction(menuitem.show_as_action_if_room | menuitem.show_as_action_collapse_action_view);      return true; }  @override protected void oncreate(bundle savedinstancestate) {     settheme(samplelist.theme); //used theme switching in samples     super.oncreate(savedinstancestate);     setcontentview(r.layout.text);     ((textview)findviewbyid(r.id.text)).settext(r.string.search_views_content); }  @override public boolean onquerytextsubmit(string query) {     toast.maketext(this, "you searched for: " + query, toast.length_long).show();     return true; }  @override public boolean onquerytextchange(string newtext) {     return false; }  @override public boolean onsuggestionselect(int position) {     return false; }  @override public boolean onsuggestionclick(int position) {     cursor c = (cursor) msuggestionsadapter.getitem(position);     string query = c.getstring(c.getcolumnindex(searchmanager.suggest_column_text_1));     toast.maketext(this, "suggestion clicked: " + query, toast.length_long).show();     return true; }  private class suggestionsadapter extends cursoradapter {      public suggestionsadapter(context context, cursor c) {         super(context, c, 0);     }      @override     public view newview(context context, cursor cursor, viewgroup parent) {         layoutinflater inflater = layoutinflater.from(context);         view v = inflater.inflate(android.r.layout.simple_list_item_1, parent, false);         return v;     }      @override     public void bindview(view view, context context, cursor cursor) {         textview tv = (textview) view;         final int textindex = cursor.getcolumnindex(searchmanager.suggest_column_text_1);         tv.settext(cursor.getstring(textindex));     } } }