解决方法
@H_502_6@SearchView searchView = (SearchView) findViewById(R.id.search);
EditText searchEditText = (EditText) searchView.findViewById(android.support.v7.appcompat.R.id.search_src_text);
searchEditText.setTextColor(getResources().getColor(R.color.white));
searchEditText.setHintTextColor(getResources().getColor(R.color.white));
