Handle Animation event, AnimationListener.

Create animation XML files.
/res/anim/fadein.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
 android:shareInterpolator="false">
 <alpha android:fromAlpha="0.0"
   android:toAlpha="1.0"
   android:duration="1000">
 </alpha>
</set>

/res/anim/fadeout.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
 android:shareInterpolator="false">
 <alpha android:fromAlpha="1.0"
   android:toAlpha="0.0"
   android:duration="1000">
 </alpha>
</set>

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<TextView  
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="@string/hello"
    />
<ImageView 
    android:id="@+id/image" 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:src="@drawable/icon"
    />
</LinearLayout>

package com.exercise.AndroidAnimation;

import android.app.Activity;
import android.os.Bundle;
import android.view.animation.Animation;
import android.view.animation.Animation.AnimationListener;
import android.view.animation.AnimationUtils;
import android.widget.ImageView;

public class AndroidAnimationActivity extends Activity {
 
 ImageView image;
 Animation animationFadeIn, animationFadeOut;
 
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        image = (ImageView)findViewById(R.id.image);
        
        animationFadeIn = AnimationUtils.loadAnimation(this, R.anim.fadein);
        animationFadeOut = AnimationUtils.loadAnimation(this, R.anim.fadeout);
        animationFadeIn.setAnimationListener(animationInListener);
        animationFadeOut.setAnimationListener(animationOutListener);
        image.startAnimation(animationFadeIn);
    }

 @Override
 protected void onPause() {
  // TODO Auto-generated method stub
  super.onPause();
  image.clearAnimation();
 }
 
 AnimationListener animationInListener
 = new AnimationListener(){

  @Override
  public void onAnimationEnd(Animation animation) {
   // TODO Auto-generated method stub
   image.startAnimation(animationFadeOut);
  }

  @Override
  public void onAnimationRepeat(Animation animation) {
   // TODO Auto-generated method stub
   
  }

  @Override
  public void onAnimationStart(Animation animation) {
   // TODO Auto-generated method stub
   
  }};
  
 AnimationListener animationOutListener
 = new AnimationListener(){

  @Override
  public void onAnimationEnd(Animation animation) {
   // TODO Auto-generated method stub
   image.startAnimation(animationFadeIn);
  }

  @Override
  public void onAnimationRepeat(Animation animation) {
   // TODO Auto-generated method stub
   
  }

  @Override
  public void onAnimationStart(Animation animation) {
   // TODO Auto-generated method stub
   
  }};
}

Download the files.


next:
- Android pre-defined Animation Resources