Is it possible to shut down the whole phone by an app? How? Do I need to root the phone?
You need the DEVICE_POWER permission in order to shut the phone completely off which requires the device being rooted.
You can use the PowerManager to get it to sleep or reboot.
http://developer.android.com/reference/android/os/PowerManager.html#reboot(java.lang.String )
Reboot also requires a permission:
http://developer.android.com/reference/android/Manifest.permission.html#REBOOT
private void powerOff() {
try {
Process proc = Runtime.getRuntime()
.exec(new String[]{ "su", "-c", "reboot -p" });
proc.waitFor();
} catch (Exception ex) {
ex.printStackTrace();
}
}
private void reboot() {
try {
Process proc = Runtime.getRuntime().exec(new String[]{ "su", "-c", "reboot" });
proc.waitFor();
} catch (Exception e) {
e.printStackTrace();
}
}
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