How can I change the action bar search view hint text colour?
This question explains how to get the EditText when using ABS: Android ActionBar Customize Search View
Just get the textView id of search widget and use setTextColor() method to change the search text color and setHintTextColor() to change the search hints text color.
// Get textview id of search widget
int id = searchView.getContext().getResources().getIdentifier("android:id/search_src_text", null, null);
TextView textView = (TextView) searchView.findViewById(id);
// Set search text color
textView.setTextColor(Color.WHITE);
// Set search hints color
textView.setHintTextColor(Color.GRAY);