Cross Reference: /development/samples/training/location-aware/res/drawable-mdpi

`Name`	`Date`	`Size`
Up to higher level directory
`button_default.9.png`	21-Aug-2018	`3.5K`
`button_default.png`	21-Aug-2018	`1.5K`
`button_on.9.png`	21-Aug-2018	`1.4K`
`button_pressed.9.png`	21-Aug-2018	`1.4K`