Android: SearchView in ActionBar

res/menu/options_menu.xml

<menu xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:id="@+id/search"
          android:title="@string/search_title"
          android:icon="@android:drawable/ic_menu_search"

          app:showAsAction="always"

          app:actionViewClass="android.support.v7.widget.SearchView" />
</menu>

Activity

public class SearchableActivity extends BaseActivity {
    
    private MenuItem searchMenuItem;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        
        super.onCreate(savedInstanceState);
        
        setContentView(R.layout.activity_searchable);

        Intent intent = getIntent();
        if (Intent.ACTION_SEARCH.equals(intent.getAction())) {
            String query = intent.getStringExtra(SearchManager.QUERY);
            doSearch(query);
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {

        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.menu_search, menu);

        SearchView searchView = new SearchView(this);
        searchView.setOnQueryTextListener(new OnQueryTextListener() {

            @Override
            public boolean onQueryTextSubmit(String query) {
                return false;
            }

            @Override
            public boolean onQueryTextChange(String query) {
                newQuery(query);
                return false;
            }
        });
        setSearchViewTextColor(searchView);

        searchMenuItem = menu.findItem(R.id.search);
        MenuItemCompat.setShowAsAction(searchMenuItem, MenuItemCompat.SHOW_AS_ACTION_ALWAYS);
        MenuItemCompat.setActionView(searchMenuItem, searchView);

        associateSearchableConfiguration(searchMenuItem);

        return true;
    }

    private void setSearchViewTextColor(SearchView searchView) {
        for (TextView textView : findChildrenByClass(searchView, TextView.class)) {
            textView.setTextColor(Color.WHITE);
        }
    }

    private void associateSearchableConfiguration(MenuItem searchMenuItem) {

        View actionView = MenuItemCompat.getActionView(searchMenuItem);

        SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
        SearchView searchView = (SearchView) actionView;
        ComponentName componentName = new ComponentName(this, SearchableActivity.class);
        searchView.setSearchableInfo(searchManager.getSearchableInfo(componentName));
    }

    public static <V extends View> Collection<V> findChildrenByClass(ViewGroup viewGroup,
            Class<V> clazz) {

        return gatherChildrenByClass(viewGroup, clazz, new ArrayList<V>());
    }

    @SuppressWarnings("unchecked")
    private static <V extends View> Collection<V> gatherChildrenByClass(ViewGroup viewGroup,
            Class<V> clazz, Collection<V> childrenFound) {

        for (int i = 0; i < viewGroup.getChildCount(); i++)
        {
            final View child = viewGroup.getChildAt(i);
            if (clazz.isAssignableFrom(child.getClass())) {
                childrenFound.add((V) child);
            }
            if (child instanceof ViewGroup) {
                gatherChildrenByClass((ViewGroup) child, clazz, childrenFound);
            }
        }

        return childrenFound;
    }

    @Override
    protected void onNewIntent(Intent intent) {
        handleIntent(intent);
    }

    private void handleIntent(Intent intent) {

        if (Intent.ACTION_SEARCH.equals(intent.getAction())) {

            String query = intent.getStringExtra(SearchManager.QUERY);
            
            newQuery(query);
        }
    }

    protected void newQuery(String query) {
        // TODO Auto-generated method stub
    }
}

res/xml/searchable.xml

<?xml version="1.0" encoding="utf-8"?>

<searchable xmlns:android="http://schemas.android.com/apk/res/android"
        android:label="@string/app_name"
        android:hint="@string/search_hint"

         />

AndroidManifest

<activity
            android:name=".SearchableActivity"
            android:label="@string/title_activity_searchable"
            android:launchMode="singleTop" >
            <meta-data
                android:name="android.app.searchable"
                android:resource="@xml/searchable" />

            <intent-filter>
                <action android:name="android.intent.action.SEARCH" />
            </intent-filter>
        </activity>