Draw A Watch Face - Android Developers

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After you configure your project and add a class that implements the watch face service, you can start writing code to initialize and draw your custom watch face.

Every watch face creates a custom subclass of a renderer that implements everything needed to draw the watch face.

The renderer combines the UserStyle, the complication information from ComplicationSlotsManager, the current time, and other state information to render the watch face, as shown in the following example:

classCustomCanvasRenderer( privatevalcontext:Context, surfaceHolder:SurfaceHolder, watchState:WatchState, privatevalcomplicationSlotsManager:ComplicationSlotsManager, currentUserStyleRepository:CurrentUserStyleRepository, canvasType:Int ):Renderer.CanvasRenderer( surfaceHolder=surfaceHolder, currentUserStyleRepository=currentUserStyleRepository, watchState=watchState, canvasType=canvasType, interactiveDrawModeUpdateDelayMillis=16L ){ overridefunrender(canvas:Canvas,bounds:Rect,zonedDateTime:ZonedDateTime){ // Draw into the canvas } overridefunrenderHighlightLayer(canvas:Canvas,bounds:Rect,zonedDateTime:ZonedDateTime){ // Draw into the canvas } }

Tag » How To Draw A Watch