 * Add 'Utils.init()' method to initialize 'Context' and 'DisplayMetrics' object, so functions might not necessary have to pass Context object.  * Until 'Utils' being initialized with a 'Context' object, it will use 'Resources.getSystem().getDisplayMetrics()' as default metrics, and if that is also missing, then use 'xhdpi' as a guess.
 * Add 'Utils.init()' method to initialize 'Context' and 'DisplayMetrics' object, so functions might not necessary have to pass Context object.
 * Until 'Utils' being initialized with a 'Context' object, it will use 'Resources.getSystem().getDisplayMetrics()' as default metrics, and if that is also missing, then use 'xhdpi' as a guess.

twang2218/material-design-toolkit