Summary:
The compileSdkVersion and targetSdkVersion which are now set to versions 26 and 26 respectively, must be changed to 28( Android Pie) as the latest Android APIs must be used to make use of the latest features.
Increasing the SDK versions of the app will not break any compatibility with older devices as we are not making any change in minSdkVesrion.
Summary: The compileSdkVersion and targetSdkVersion which are now set to versions 26 and 26 respectively, must be changed to 28( Android Pie) as the latest Android APIs must be used to make use of the latest features. Increasing the SDK versions of the app will not break any compatibility with older devices as we are not making any change in minSdkVesrion.