Mobile operating system as the core of the smartphone, while the application is the core of the system, recently foreign media reports, in a Google document shows that the Android4.1 system and the previous system applications will not be used in the Android9.0 (ANDROIDP) system.
Google has reportedly added a new min_supported_target_sdk_int to the SDK, limiting the SDK version of all applications to V17, the Android4.2 system. That is, none of the Android4.1 and previous applications can be installed or run on the Android9.0 system.
In addition, a special experiment has been done on this case, with a preview version of the Android9.0 system installed on a virtual machine and an application in the old system installed in 9.0, but when running the application it is warned that the application will not function properly.
In fact, the new system is not allowed to run the old application This approach is not original Google, as early as last year when Apple launched the IOS11 system, it has banned 32-bit platform equipment to update to the IOS11 system. So Google this approach can be understood, after all, from the perspective of scientific and technological progress, the old equipment and applications if not eliminated, but also to increase the cost of the development of new systems.