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// String uniqueID = UUID.randomUUID().toString();
// https://developer.android.com/training/articles/user-data-ids.html
String uniqueID = UUID.randomUUID().toString();


// https://stackoverflow.com/questions/2785485/is-there-a-unique-android-device-id
import android.provider.Settings.Secure;
private String android_id = Secure.getString(getContext().getContentResolver(),
                                                        Secure.ANDROID_ID);