Missing density folder

Missing density folder

Icons will look best if a custom version is provided for each of the major screen density classes (low, medium, high, extra-high, extra-extra-high). This lint check identifies folders which are missing, such as drawable-hdpi.

Low density is not really used much anymore, so this check ignores the ldpi density. To force lint to include it, set the environment variable ANDROID_LINT_INCLUDE_LDPI=true. For more information on current density usage, see https://developer.android.com/about/dashboards

Issue id: IconMissingDensityFolder

https://developer.android.com/guide/practices/screens_support.html