How do Android Developers handle App Compatibility across different Devices?

Due to a number of best practices, such as responsive design and testing with screen sizes, Android developers ensure that their applications are compatible. The use of the Android Support Library is also a common measure taken by them. They check if their code has been optimized for different high-end and low-end hardware configurations. Employing certain inbuilt features for compatibility that Android provides, such as rearward compatibility libraries, would make a device working on a totally different version of Android work just fine.