Android Timer Implementation Guide

There are several ways to implement a timer in Android.

1. Using Handler and Runnable: Implementing a timer functionality by using Handler’s postDelayed() method to delay the execution of a Runnable task.
2. Use Timer and TimerTask: By using the Timer class and TimerTask class to implement the timer function, you can set the execution time of the scheduled task using the schedule() method.
3. You can utilize the CountDownTimer class to create a countdown timer by setting the total time and interval time in the constructor, and then override the onTick() and onFinish() methods to implement the logic for the timed task.
4. Utilize the AlarmManager class: The AlarmManager is a system service in Android that can execute specific tasks at specified times. You can set the trigger time for scheduled tasks using the set() method.

In general, all of the above methods can achieve the functionality of a timer, and developers can choose the suitable method based on specific requirements to implement the timer.