Yes, there is. The ACTION_TIME_CHANGED Intent is broadcast when the device time is changed, and you can have a method which will trigger when this Intent is detected.
This intent has been in Android since API level 1, so it should work on any platform you might need to be compatible with.
You’ll need to handle the Broadcast with a BroadcastReceiver:
public class TimeChangedReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
//Do whatever you need to
}
}
You’ll also need to add something like this to your Manifest:
<receiver android:name=".TimeChangedReceiver">
<intent-filter>
<action android:name="android.intent.action.TIME_SET" />
</intent-filter>
</receiver>
This will let Android know to trigger your receiver when this type of intent is detected.
It appears as though this doesn’t care who edits the time, but also does not trigger on automatic adjustments when you are synced with the network. If you lose network and regain it, though, this will likely fire since your time will be slightly different (assuming you are using automatic network time).
However, while the clocks on cell phones are not particularly accurate (since they generally rely on syncing with time signals they receive) in my experience they absolutely should not lose more than about 30 seconds or a minute per hour, at the absolute maximum, so if the time change is small you can perhaps assume it was automatic. Leap seconds, when they are added, will also likely produce a time change message, although these are obviously small and infrequent.
You can use ConnectivityManager to keep track of whether the phone has a connection or not and you can change the behavior based on that (i.e. as long as network connectivity is there, and the time is automatic/network time, ignore time changes or something) but I can’t find any intents regarding losing/regaining network connectivity so you will probably have to use a polling method.