setDrawerShadow
Set a simple drawable used for the left or right shadow. The drawable provided must have a nonzero intrinsic width. For API 21 and above, an elevation will be set on the drawer instead of using the provided shadow drawable.
Note that for better support for both left-to-right and right-to-left layout directions, a drawable for RTL layout (in additional to the one in LTR layout) can be defined with a resource qualifier "ldrtl" for API 17 and above with the gravity START. Alternatively, for API 23 and above, the drawable can auto-mirrored such that the drawable will be mirrored in RTL layout.
Parameters
Shadow drawable to use at the edge of a drawer
Which drawer the shadow should apply to
Set a simple drawable used for the left or right shadow. The drawable provided must have a nonzero intrinsic width. For API 21 and above, an elevation will be set on the drawer instead of using the provided shadow drawable.
Note that for better support for both left-to-right and right-to-left layout directions, a drawable for RTL layout (in additional to the one in LTR layout) can be defined with a resource qualifier "ldrtl" for API 17 and above with the gravity START. Alternatively, for API 23 and above, the drawable can auto-mirrored such that the drawable will be mirrored in RTL layout.
Parameters
Resource id of a shadow drawable to use at the edge of a drawer
Which drawer the shadow should apply to