I am making a new watch face using the official API and I'm trying to figure out how to display battery percentage. (sorry i'm a complete noob)
How to display battery percentage on Watch Face
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Register a
Intent.ACTION_BATTERY_CHANGEDBroadcastReceiverinside yourWatchFaceService.Engine.onCreateoverride and deregister it inWatchFaceService.Engine.onDestroy. When your receive a broadcast, get the battery level from the broadcast, assign it to some field in your watch face and redraw the watch face using the new value.If this is confusing and you need more detailed description, best build understanding of two areas: watch faces in general and battery monitoring.
To understand watch faces, please follow https://developer.android.com/training/wearables/watch-faces/index.html It will walk you through the whole process of creating the watch face, including the lifecycle. This will make
onCreateandonDestroyclear.After you understand watch faces, please read about battery level monitoring on Android: https://developer.android.com/training/monitoring-device-state/battery-monitoring.html
After you finish these two pieces, you should actually not need to come back to this question, because things should just come together on their own.