question: fade the actionbar background to zero opacity concode_field_sep AppCompatActivity mActivity concode_elem_sep Drawable mOldBackground concode_elem_sep Handler mHandler concode_elem_sep ActionBar mActionBar concode_elem_sep int mNewColor concode_elem_sep View mToolbar concode_elem_sep Drawable.Callback drawableCallback concode_field_sep void init concode_elem_sep void invalidateDrawable concode_elem_sep Drawable getColoredBackground concode_elem_sep Resources getResources concode_elem_sep ActionBarBackground fadeIn concode_elem_sep ActionBarBackground fadeIn concode_elem_sep ActionBarBackground changeColor concode_elem_sep ActionBarBackground changeColor concode_elem_sep ActionBarBackground changeColor concode_elem_sep ActionBarBackground fadeBackground concode_elem_sep ActionBarBackground fadeBackground concode_elem_sep void unscheduleDrawable concode_elem_sep ActionBarBackground fadeDrawable concode_elem_sep View getToolbar concode_elem_sep void scheduleDrawable
target: ActionBarBackground function ( ) { Drawable loc0 = getColoredBackground ( android . R . color . transparent ) ; loc0 . setAlpha ( 0 ) ; fadeBackground ( mOldBackground , loc0 ) ; return this ; }