问搜索视图工具栏关闭图标

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<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">
    <item
        android:id="@+id/action_search"
        app:actionViewClass="android.support.v7.widget.SearchView"
        app:showAsAction="collapseActionView|ifRoom"
        android:icon="@mipmap/ic_search_white_24dp"
        android:title="Search" />
</menu>

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

    SearchManager searchManager =
            (SearchManager) getActivity().getSystemService(Context.SEARCH_SERVICE);
    searchView = (SearchView) menu.findItem(R.id.action_search).getActionView();

    searchView.setQueryHint("Search...");

    ((EditText) searchView.findViewById(android.support.v7.appcompat.R.id.search_src_text)).setTextColor(Color.WHITE);
    ((EditText) searchView.findViewById(android.support.v7.appcompat.R.id.search_src_text)).setHintTextColor(getResources().getColor(R.color.notify_user_color));

    if (searchManager != null) {
        searchView.setSearchableInfo(
                searchManager.getSearchableInfo(getActivity().getComponentName()));
    }

    AutoCompleteTextView searchTextView = searchView.findViewById(android.support.v7.appcompat.R.id.search_src_text);
    try {
        Field mCursorDrawableRes = TextView.class.getDeclaredField("mCursorDrawableRes");
        mCursorDrawableRes.setAccessible(true);
        mCursorDrawableRes.set(searchTextView, R.drawable.cursor_for_search_view); //This sets the cursor resource ID to 0 or @null which will make it visible on white background
    } catch (Exception e) {
    }

    searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
        @Override
        public boolean onQueryTextSubmit(String query) {
            mAdapter.getFilter().filter(query);
            return true;
        }

        @Override
        public boolean onQueryTextChange(String newText) {
            mAdapter.getFilter().filter(newText);
            return true;
        }

    });
}