Android简单的开机动画

MainActivity如下:

package com.cn.testanimation;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.animation.Animation;
import android.view.animation.Animation.AnimationListener;
import android.view.animation.AnimationUtils;
import android.widget.ImageView;
import android.widget.Toast;
public class MainActivity extends Activity {
   private ImageView imageView;
   private Animation welcomeAnimation;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        imageView=(ImageView) findViewById(R.id.imageView);
        welcomeAnimation=AnimationUtils.loadAnimation(this, R.anim.welcome);
        imageView.startAnimation(welcomeAnimation);
        welcomeAnimation.setAnimationListener(new AnimationListener() {
			public void onAnimationStart(Animation animation) {			
			}
			
			public void onAnimationRepeat(Animation animation) {
			}
			
     		public void onAnimationEnd(Animation animation) {
				//Tip:动画结束时,利用Intent跳转到下个Activity
				Toast.makeText(getApplicationContext(), "准备跳转到下一个页面", 0).show();
			}
		});
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }
}

main.xml如下:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

   <ImageView 
       android:id="@+id/imageView"
       android:layout_width="fill_parent"
       android:layout_height="fill_parent"
       android:background="@drawable/ic_launcher"
   />

</RelativeLayout>

welcome.xml动画如下:

<?xml version="1.0" encoding="utf-8"?>
<!-- Alpha=1.0表示不透明,Alpha=0.0表示透明 -->
<set 
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:interpolator="@android:anim/decelerate_interpolator" >
    <alpha
        android:duration="4000"
        android:fromAlpha="0.0"
        android:toAlpha="1.0"
     />
</set>