how to force turn off device?

Question

currently eclipse/android studio cannot build the app with error: undefined function gotosleep();

PowerManager pm = (PowerManager) getSystemService(POWER_SERVICE);
        pm.goToSleep(100);

here in the manifest added:

<uses-permission  android:name="android.permission.DEVICE_POWER"/>

and change package to:

android.uid.system

we dont want the device admin lock to make android sleep as it is different from PowerManager, and not sure if changing setting timeout would achieve similar result with PowerManager, but not sure if it can be wake up(turn screen on) programmatically.

Regards, Vims