在Android设备上确定各种屏幕尺寸的DP

In android applications, we maintain dimen.xml for various screen resolutions. Say for example I am using device X as base development device and defining dimen.xml relative to device X. Now if I want to know what will be corresponding dimen.xml for a different density device what procedure/strategy can be followed here? For example: If I In android applications, we maintain dimen.xml