Android offers pre-loaded animation that the system runs each time you make a change to the layout. All you need to do is set an attribute in the layout to tell the Android system to animate these layout changes, and system-default animations are carried out for you.
Tip: If you want to supply custom layout animations,
create a LayoutTransition
object and supply it to
the layout with the setLayoutTransition()
method.
Here's what a default layout animation looks like when adding items to a list:
Create the layout
In your activity's layout XML file, set the android:animateLayoutChanges
attribute to true
for the layout that you want to enable animations for.
For instance:
<LinearLayout android:id="@+id/container" android:animateLayoutChanges="true" ... />
Add, update, or remove items from the layout
Now, all you need to do is add, remove, or update items in the layout and the items are animated automatically:
Kotlin
lateinit var containerView: ViewGroup ... private fun addItem() { val newView: View = ... containerView.addView(newView, 0) }
Java
private ViewGroup containerView; ... private void addItem() { View newView; ... containerView.addView(newView, 0); }