Turn off device programmatically

In my case, I do not think it is possible to shut the device down how I would like to.

The closest that I managed to get to my target was using:

Intent i = new Intent("android.intent.action.ACTION_REQUEST_SHUTDOWN");
i.putExtra("android.intent.extra.KEY_CONFIRM", true);
startActivity(i);

That brings up a dialog to turn the device off. This is the perfect solution, but in my case, using it causes the device to crash. It may be that my device is somewhat special, and other devices will not have these restrictions.

In any case, I hope that my testing will help others in their quest.

It work for me on rooted device. If your device is rooted then you can use below approach

Shutdown:

try {
    Process proc = Runtime.getRuntime()
                    .exec(new String[]{ "su", "-c", "reboot -p" });
    proc.waitFor();
} catch (Exception ex) {
    ex.printStackTrace();
}

Restart:

Same code, just use "reboot" instead of "reboot -p".

Runtime.getRuntime().exec(new String[]{ "su", "-c", "reboot -p" });

it works, just with rooted devices!!