How to create animation by default in a GridLayout in Android?

This example shows you how to create animation using the default XML tag in a gridview.

This application demonstrates how to use the animateLayoutChanges tag in XML to automate
transition animations as items are removed from or added to a container.

Click on the download link to get the source code.

Let’s have a look.

At first we will look at the layout XML.

layout_animations_by_default.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <Button
        android:id="@+id/addNewButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Add Button" />

    <GridLayout
        android:id="@+id/gridContainer"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:animateLayoutChanges="true"
        android:columnCount="4" />

</LinearLayout>

Now the Activity that uses this XML to create the animation.
LayoutAnimationsByDefault.java

package com.example.animationdemo1;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.GridLayout;

/**
 * This application demonstrates how to use the animateLayoutChanges tag in XML to automate
 * transition animations as items are removed from or added to a container.
 */
public class LayoutAnimationsByDefault extends Activity {

    private int numButtons = 1;

    @Override
    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.layout_animations_by_default);

        final GridLayout gridContainer = (GridLayout) findViewById(R.id.gridContainer);

        Button addButton = (Button) findViewById(R.id.addNewButton);
        addButton.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                Button newButton = new Button(LayoutAnimationsByDefault.this);
                newButton.setText(String.valueOf(numButtons++));
                newButton.setOnClickListener(new View.OnClickListener() {
                    public void onClick(View v) {
                        gridContainer.removeView(v);
                    }
                });
                gridContainer.addView(newButton, Math.min(1, gridContainer.getChildCount()));
            }
        });
    }

}

You can download the complete source code for the above post from here.