CrossFading Animation in Android Using Android Studio

Introduction

This article explains cross fade animation in Android using Android Studio. In this you will first use two Textviews and a Button inside a relative layout in your XML file. On a button click you need to perform the cross_fade animation.

To perform cross fade animation you need to create two XML files inside the res folder, fade_in and fade_out.

Inside the fade_out folder you will write alpha animation because you need to fade_out one TextView as in the following:

<?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="1.0"
android:interpolator="@android:anim/accelerate_interpolator"
android:toAlpha="0.0" />
</set>

Inside the fade_In folder you will write alpha animation because you need to fade_in one TextView as in the following:

<?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>

In the Java Class file, you will first create the two Animation objects, FadeIn and FadeOut. In these objects, you will load the animations fade_in and fade_out by calling the loadAnimation() method of the AniamtionUtills class.

FadeIn = AnimationUtils.loadAnimation(getApplicationContext()R.anim.fade_in);
FadeOut = AnimationUtils.loadAnimation(getApplicationContext(),R.anim.fade_out);

Step 1

Create an XML file and write this:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="#ff8769">
<TextView android:id="@+id/txtView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Fade In Text"
android:layout_centerInParent="true"
android:textSize="25dp"
android:textStyle="italic"/>
<TextView android:id="@+id/txtView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Fade Out Text"
android:layout_centerInParent="true"
android:textSize="25dp"
android:visibility="gone"
android:textStyle="italic"/>
<Button android:id="@+id/btnAnimation"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Start Animation"
android:layout_marginTop="30dp"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="20dp"/>
</RelativeLayout>

Step 2

Fade_in XML file:

<?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>

Step 3

Fade_out XML file:

<?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="1.0"
android:interpolator="@android:anim/accelerate_interpolator"
android:toAlpha="0.0" />
</set>

Step 4

Create a Java file and write this:

In the Java Class file, you will first create the two Animation objects FadeIn and FadeOut. In these objects, you will load the animations fade_in and fade_out by calling the loadAnimation() method of the AniamtionUtills class. Set the animation on its listener.

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.Animation.AnimationListener;
import android.view.animation.AnimationUtils;
import android.widget.Button;
import android.widget.TextView;
public class CrossfadeActivity extends Activity implements AnimationListener {
TextView txtview1, txtview2;
Button btnAnimation;
Animation FadeIn, FadeOut;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_crossfade);
txtview1 = (TextView) findViewById(R.id.txtView1);
txtview2 = (TextView) findViewById(R.id.txtView2);
btnAnimation = (Button) findViewById(R.id.btnAnimation);
FadeIn = AnimationUtils.loadAnimation(getApplicationContext(),
R.anim.fade_in);
FadeOut = AnimationUtils.loadAnimation(getApplicationContext(),
R.anim.fade_out);
FadeIn.setAnimationListener(this);
FadeOut.setAnimationListener(this);
btnAnimation.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
txtview2.setVisibility(View.VISIBLE);
txtview2.startAnimation(FadeIn);
txtview1.startAnimation(FadeOut);
}
});
}
@Override
public void onAnimationEnd(Animation animation) {
if (animation == FadeOut) {
txtview1.setVisibility(View.GONE);
}
if(animation == FadeIn){
txtview2.setVisibility(View.VISIBLE);
}
}
@Override
public void onAnimationRepeat(Animation animation) {
}
@Override
public void onAnimationStart(Animation animation) {
}
}

Step 5

When you run your project:

Image 2

Image 3

When you run this project on your emulator or device then you will see the animation.

CrossFading Animation in Android Using Android Studio

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