How does JobScheduler work internally in Android SDK?

JobScheduler is a system service in Android that manages scheduled jobs that run in the background. It helps to optimize battery usage and memory by scheduling jobs under various constraints such as device connectivity, charging status, and storage availability. JobScheduler is particularly useful for tasks that do not require immediate execution and can be deferred to save resources.

When you create a job using JobScheduler, you define a JobInfo object that specifies the job’s requirements such as network type, charging status, and more. The JobScheduler then decides the optimal time to run your job based on these constraints and the current state of the device. The execution is handled by the system's JobService, which provides a callback method called `onStartJob()`, where you implement the job's execution logic.