How to create animation using XML file in an Android App?

This example demonstrates how do I create an animation using XML in an android app.

Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.

Step 2 − Add the following code to res/layout/activity_main.xml.

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:tools="http://schemas.android.com/tools"
   android:layout_width="match_parent"
   android:padding="4dp"
   android:layout_height="match_parent"
   tools:context=".MainActivity">
   <TextView
      android:textSize="24sp"
      android:textStyle="bold"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="Have a Wonderful day!"
      android:layout_centerInParent="true"
      android:id="@+id/textView" />
   <Button
      android:id="@+id/button"
      android:layout_alignParentBottom="true"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:text="Start Animation"/>
</RelativeLayout>

Step 3 − Create a new android resource directory (anim) and create these below mentioned anim resource files

Myanim.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" android:fillAfter="true">
   <alpha
      android:duration="1000"
      android:fromAlpha="0.0"
      android:interpolator="@android:anim/accelerate_interpolator"
      android:toAlpha="1.0" />
</set>

zoom.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" android:fillAfter="true">
   <scale
      android:duration="1000"
      android:fromXScale="1"
      android:fromYScale="1"
      android:pivotX="50%"
      android:pivotY="50%"
      android:toXScale="3"
      android:toYScale="3"></scale>
</set>

blink.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
   <alpha android:fromAlpha="0.0"
      android:toAlpha="1.0"
      android:interpolator="@android:anim/accelerate_interpolator"
      android:duration="600"
      android:repeatMode="reverse"
      android:repeatCount="infinite"/>
</set>

Step 4 − Add the following code to src/MainActivity.java

import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.Button;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity implements
Animation.AnimationListener {
   TextView textView;
   Button button;
   Animation animation;
   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      textView = findViewById(R.id.textView);
      button = findViewById(R.id.button);
      animation = AnimationUtils.loadAnimation(getApplicationContext(), R.anim.blink);
      animation.setAnimationListener(this);
      button.setOnClickListener(new View.OnClickListener() {
         @Override
         public void onClick(View v) {
            textView.setVisibility(View.VISIBLE);
            textView.startAnimation(animation);
         }
      });
   }
   @Override
   public void onAnimationStart(Animation animation) {
   }
   @Override
   public void onAnimationEnd(Animation animation1) {
   }
   @Override
   public void onAnimationRepeat(Animation animation) {
   }
}

Step 5 − Add the following code to androidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="app.com.sample">
   <application
      android:allowBackup="true"
      android:icon="@mipmap/ic_launcher"
      android:label="@string/app_name"
      android:roundIcon="@mipmap/ic_launcher_round"
      android:supportsRtl="true"
      android:theme="@style/AppTheme">
         <activity android:name=".MainActivity">
            <intent-filter>
               <action android:name="android.intent.action.MAIN" />
               <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
      </activity>
   </application>
</manifest>

Let's try to run your application. I assume you have connected your actual Android Mobile device with your computer. To run the app from the android studio, open one of your project's activity files and click Run  icon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen −

Click here to download the project code.

Azhar

Published on 26-Nov-2019 11:47:58