How do Apps work on Android?
Apps on Android work by interacting with the Android operating system (OS). The OS provides a set of APIs (application programming interfaces) that apps can use to access the device's hardware and software resources.
When you open an app, the OS loads the app's code into memory and creates a process for the app to run in. The app's process can then interact with the OS's APIs to access the device's resources.
For example, an app might use the OS's APIs to access the device's camera, to read and write files to the device's storage, or to connect to the internet.
The OS also manages the lifecycle of apps. When you close an app, the OS stops the app's process and frees up the memory that the app was using.
Here are the steps on how apps work on Android:
- An app is installed on your device.
- When you open an app, the Android OS loads the app's code into memory and creates a process for the app to run in.
- The app's process can then interact with the Android OS's APIs to access the device's resources.
- The app can then do whatever it is designed to do, such as play a game, browse the web, or send a text message.
- When you close an app, the Android OS stops the app's process and frees up the memory that the app was using.
Here are some of the key concepts involved in how apps work on Android:
- Processes: A process is a running instance of an app. Each app has its own process, and each process has its own memory space.
- APIs: APIs are sets of functions that apps can use to interact with the Android OS. There are APIs for accessing the device's hardware, software, and network resources.
- Lifecycle: The lifecycle of an app is the series of events that an app goes through from the time it is installed to the time it is closed. The lifecycle of an app is managed by the Android OS.
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