public void showSuggestions() {
        if (mAdapter != null && mAdapter.getCount() > 0 && mSuggestionsListView.getVisibility() == GONE) {
            mSuggestionsListView.setVisibility(VISIBLE);
        }
    }
Call this method to show suggestions list. This shows up when adapter is set. Call {@link #setAdapter(ListAdapter)} before calling this.
android/third_party/search/src/main/java/com/miguelcatalan/materialsearchview/MaterialSearchView.java