LinearLayout change android:layoutAnimation programmatically

Question

Is there any way to change android:layoutAnimation to a different animation resource programmatically using Java?

Answer 1

Is there any way to change android:layoutAnimation to a different animation resource programmatically using Java?

Yes : you can use LayoutAnimationController

• A layout animation controller is used to animated a layout's, or a view group's, children. Each child uses the same animation but for every one of them, the animation starts at a different time. A layout animation controller is used by ViewGroup to compute the delay by which each child's animation start must be offset

HERE IS WORKING EXAMPLE CODE

public class MainActivity extends AppCompatActivity {

    LinearLayout rootView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        rootView=findViewById(R.id.rootView);
        LayoutAnimationController anim = AnimationUtils.loadLayoutAnimation(this, R.anim.scale_down);
        rootView.setLayoutAnimation(anim);
    }


}

Layout.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/rootView"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <Button
        android:layout_width="match_parent"
        android:id="@+id/buttonPanel"
        android:layout_height="wrap_content" />

</LinearLayout>

R.anim.scale_down

 <layoutAnimation
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:animation="@anim/scale_up" />

@anim/scale_up

<set xmlns:android="http://schemas.android.com/apk/res/android">
    <scale
        android:duration="1000"
        android:fromXScale="0"
        android:fromYScale="0"
        android:pivotX="50%"
        android:pivotY="50%"
        android:toXScale="1.0"
        android:toYScale="1.0" />
</set>