Android apps are software programs that run on the Android OS. They can be installed on Android tablets, phones, and televisions. They are extremely adept at making use of the touchscreen, camera and GPS features on the device. Having lots of apps installed on an Android phone can, however, affect the life of batteries and performance.
The process of creating Android apps requires an understanding of the Android platform, including its design principles and frameworks. It also requires a well-designed app architecture, which separates UIand OS-related code into components that have shared duties. These components can be activated in asynchronous fashion by the system via a broadcast mechanism triggered by intents.
Java is the preferred language for Android development, however Kotlin has gained popularity in recent years. Both are supported by Android SDK. Online, there’s a large community of developers that can help newcomers understand the language and solve any issues.
The Android OS itself is divided into multiple layers, with the application layer containing the standard applications that come with the operating system, as well as proprietary apps bundled with a particular device, like the phone dialer or music player. The Android application layer is comprised of custom firmwares, like CyanogenMod or OMFGB. These can be installed to alter the functions of specific devices.
Another reason that stops certain apps from functioning is compatibility. If an app has been released to the US market but is not compatible with your European device, it will not work on it and will be marked as “incompatible” in the Play Store.
https://droidkingforum.co.uk/blog/android-device-manager-in-software-development