Implementation of android.support.v7.widget.SearchView

MainActivity.java

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    MenuInflater inflater = getMenuInflater();
    inflater.inflate(R.menu.menu_main, menu);

    SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
    MenuItem searchItem = menu.findItem(R.id.action_search);
    ComponentName cn = new ComponentName(this, SearchableActivity.class);
    
    SearchView searchView = (SearchView) searchItem.getActionView();
    searchView.setSearchableInfo(searchManager.getSearchableInfo(cn));
    searchView.setIconifiedByDefault(true);

    searchView.setOnQueryTextFocusChangeListener(new View.OnFocusChangeListener() {
        @Override
        public void onFocusChange(View view, boolean queryTextFocused) {
            if (!queryTextFocused) {
                MenuItemCompat.collapseActionView(searchItem);
            }
        }
    });
    return true;
}

menu_main.xml

<item
    android:id="@+id/action_search"
    android:title="@string/search"
    android:icon="@mipmap/ic_open_search"
    app:showAsAction="always|collapseActionView"
    app:actionViewClass="android.support.v7.widget.SearchView"
    />