What functions or methods can be implemented or modified when developing a custom View component?

In the context of Android development, the Service class can be extended to create a background service. To manage its behavior and rendering, you can override or implement the following methods:

• onCreate() — called when the service is first created.
• onStartCommand(Intent intent, int flags, int startId) — called when the service is started.
• onBind(Intent intent) — used for bound services, to return an IBinder for clients.
• onDestroy() — called when the service is being destroyed.
• onRebind(Intent intent) — called when new clients bind to the service.
• onUnbind(Intent intent) — called when all clients have unbound.
• onTaskRemoved(Intent rootIntent) — called when the service is killed due to task removal.

Example of overriding onDraw in a custom View for drawing a circle:

@Override
protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);
    Paint paint = new Paint();
    paint.setColor(Color.RED);
    canvas.drawCircle(getWidth() / 2, getHeight() / 2, 50, paint);
}

This allows you to control the visual representation, size, and interaction of a custom component.