MESSAGE
错误提示: Attempt to invoke virtual method 'android.content.res.Resources android.content.Context.getResources()' on a null object reference
解决方法: Replace this line : getResources().getDrawable(R.drawable.your_drawable)
with
ResourcesCompat.getDrawable(getResources(), R.drawable.your_drawable, null)
参考:http://stackoverflow.com/questions/29041027/android-getresources-getdrawable-deprecated-api-22