CanvasComplication

abstract void drawHighlight(
    @NonNull Canvas canvas,
    @NonNull Rect bounds,
    int boundsType,
    @NonNull ZonedDateTime zonedDateTime,
    @ColorInt int color
)

Draws a highlight for a ComplicationSlotBoundsType.ROUND_RECT complication. The default implementation does this by drawing a dashed line around the complication, other visual effects may be used if desired.

@ComplicationExperimental
default void drawHighlight(
    @NonNull Canvas canvas,
    @NonNull Rect bounds,
    int boundsType,
    @NonNull ZonedDateTime zonedDateTime,
    @ColorInt int color,
    BoundingArc boundingArc
)

Draws a highlight for a ComplicationSlotBoundsType.ROUND_RECT complication. The default implementation does this by drawing a dashed line around the complication, other visual effects may be used if desired.

abstract @NonNull ComplicationData getData()

Returns the ComplicationData to render with.

abstract void loadData(
    @NonNull ComplicationData complicationData,
    boolean loadDrawablesAsynchronous
)

Sets the ComplicationData to render with and loads any Drawables contained within the ComplicationData. You can choose whether this is done synchronously or asynchronously via loadDrawablesAsynchronous. When any asynchronous loading has completed InvalidateCallback.onInvalidate must be called.

@WorkerThread
default void onRendererCreated(@NonNull Renderer renderer)

Called once on a background thread before any subsequent UI thread rendering to inform the CanvasComplication of the Renderer which is useful if they need to share state. Note the Renderer is created asynchronously which is why we can't pass it in via CanvasComplicationFactory.create as it may not be available at that time.

@UiThread
abstract void render(
    @NonNull Canvas canvas,
    @NonNull Rect bounds,
    @NonNull ZonedDateTime zonedDateTime,
    @NonNull RenderParameters renderParameters,
    int slotId
)

Draws the complication defined by getData into the canvas with the specified bounds. This will usually be called by user watch face drawing code, but the system may also call it for complication selection UI rendering. The width and height will be the same as that computed by computeBounds but the translation and canvas size may differ.