Is there a unique Android device ID?
Do Android devices have a unique ID, and if so, what is a simple way to access it using Java?
Solution :
Settings.Secure#ANDROID_ID returns the Android ID as an unique for each user 64-bit hex string.import android.provider.Settings.Secure;
private String android_id = Secure.getString(getContext().getContentResolver(),
Secure.ANDROID_ID);
Update: 06/05/2015
http://stackoverflow.com/questions/2785485/is-there-a-unique-android-device-id
