Threads in Android | Perform a task after some seconds | Handler in Android Studio

Handler helps us perform a task after some second. When we work on a real-world project, many times we need to wait for some time (for e.g. 5 sec) and then execute a function.
The video describes exactly that method.

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[MohsenMashkour]

Hello. thank you for your video. how can i do the reverse action?
i wanna have a button and when i click it start an activity then after a while automatically stop the activity by the delay or stop first function and start another.