menu.xml

<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools" tools:context=".MainActivity">

    <item android:id="@+id/my_search"
        android:title="搜尋"
        android:icon="@drawable/ic_search_24dp"
        app:showAsAction="ifRoom"
        app:actionViewClass="android.support.v7.widget.SearchView" />
</menu>

search.java

@Override
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
        inflater.inflate(R.menu.menu_search, menu);

        MenuItem menuItem = menu.findItem(R.id.my_search);

        SearchView searchView = (SearchView)menuItem.getActionView();
        searchView.setIconifiedByDefault(true);
        searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
            @Override
            public boolean onQueryTextSubmit(String query) {
                return false;
            }

            @Override
            public boolean onQueryTextChange(String newText) {
                presenter.onFilter(newText);
                return false;
            }
        });
        super.onCreateOptionsMenu(menu, inflater);
    }