In simple terms, Google added a MIN_SUPPORTED_TARGET_SDK_INT to the SDK in Android P. If the developer does not support this new rule in the application (API level is v17, which corresponds to Android 4.2.), then this is lower than this. The version of the application will not be installed and used.
After the developer simulated the Android P through a virtual machine, he discovered that applications before Android 4.1 could be installed, but the pop-up window that was displayed was unusable. Therefore, after finishing the application, Google is more and more like iOS.
Although Android is an open source system, Google is slowly locking up its degree of freedom. In simple terms, it locks down the application’s hidden API access rights and prohibits unauthorized access to the user device’s camera. Many developers vomit that this is a problem. This will undoubtedly limit Android’s openness and make the system more and more like a closed iOS system.