how to use gridlayoutmanager in android code example

Example: android gridlayoutmanager

in res/values/dimens.xml:

<integer name="grid_columns">1</integer>

in res/values-w600dp/dimens.xml:

<integer name="grid_columns">2</integer>

in java:

int gridColumns = getResources().getInteger(R.integer.grid_columns);