BlinkAnimation in Android

Actvity_Main.xml

<?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">  
   
    <TextView android:id="@+id/txtMessage"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="This is fadein animation"
        android:layout_centerInParent="true"
        android:textSize="25dp"
        android:padding="20dp"
        android:background="#000000"
        android:visibility="gone"/>
       
    <Button android:id="@+id/btnStart"
        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>

MainActivity.Java

package com.example.blinkanimation;

import android.app.Activity;

import android.os.Bundle;

import android.view.Menu;

import android.view.MenuItem;

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 MainActivity extends Activity  implements AnimationListener {

TextView txtMessage;

Button btnStart;

// Animation

Animation animBlink;

@Override

protected void onCreate(Bundle savedInstanceState) {

// TODO Auto-generated method stub

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

txtMessage = (TextView) findViewById(R.id.txtMessage);

btnStart = (Button) findViewById(R.id.btnStart);

// load the animation

animBlink = AnimationUtils.loadAnimation(getApplicationContext(),

R.anim.blink);

// set animation listener

animBlink.setAnimationListener(this);

// button click event

btnStart.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

txtMessage.setVisibility(View.VISIBLE);

// start the animation

txtMessage.startAnimation(animBlink);

}

});

}

@Override

public void onAnimationEnd(Animation animation) {

// Take any action after completing the animation

// check for blink animation

if (animation == animBlink) {

}

}

@Override

public void onAnimationRepeat(Animation animation) {

}

@Override

public void onAnimationStart(Animation animation) {

}

}

After this create one folder in Resources name as anim. In anim folder  create one one xml file as blink.xml with below code

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>

Output: