How to kill all running applications in android?

Question

I want to kill all running applications in android .so for this task , i implemented following code. But it is not working .App still remains in running.

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Answer 1

According to doc enter link description here

Note that, though this API allows us to request to kill any process based on its PID, the kernel will still impose standard restrictions on which PIDs you are actually able to kill. Typically this means only the process running the caller's packages/application and any additional processes created by that app

I test it, and it only kill process hosted my App.