this package animates widgets with springs when their location changes
Using this project should be fairly simple.
Just wrap you widget in a AnimtedSpring and you are ready to move your widget around without jarring layout changes.
You might need to provide a key to ensure a stable indenty.
If you want customize the spring just supply a SpringDescription to the spring parameter.
You can also provide a custom shouldAnimate callback, to customize when the the widget should be animated, just snap to the new position (same behaviour as without AnimatedSpring) or freeze at the current position.