uniqueidentifier - 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?

Answer

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);