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Jan 8 / Mike Ward

Notification LED in Android

Note: The device I was testing this on was a Motorola Moto G (XT1045) running Android 4.4.4 (API 19).

I’ve never had to do Google Cloud Messaging on Android before, but it’s fairly straightforward. I did have problems with one minor thing, though – for some reason, while I could make the Notification sound chime and the vibrate go when I created a notification to show the message I received, I couldn’t seem to get the notification LED to blink. I could hard-code it with setLights, but I didn’t want to do that, I wanted to be able to make it behave like any other notifications received on the device.

So, what I was trying to do was build it normally with NotificationCompat.Builder, and then just doing this:


Notification notif = mBuilder.build();
notif.defaults |= Notification.DEFAULT_SOUND;
notif.defaults |= Notification.DEFAULT_VIBRATE;
notif.defaults |= Notification.DEFAULT_LIGHTS;

But as I said, the sound and vibrate worked, but lights didn’t. Asking in #android-dev on Freenode, it was suggested I try using .setDefaults(Notification.DEFAULT_ALL). Amusingly, even though it seems like it should be the same thing effectively, it works.

Searching around, I hadn’t found anything that would have led me to this, so I thought I’d share in case some other poor soul out there faces a similar problem.

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