andriod一个不错的启动菜单显示屏动画效果

效果图：

看到一个老外做的不错的android启动菜单的动画效果，小结下。 
1 首先在drawable目录下放一些动画要用的图片。

2 splash.xml:

<?xml version="1.0" encoding="utf-8"?> 

<LinearLayout

  xmlns:android="http://schemas.android.com/apk/res/android 

android:layout_width="wrap_content"

  android:layout_height="wrap_content"

  android:id="@+id/TheSplashLayout"

  android:layout_gravity="center"

  > 

<ImageView

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:id="@+id/SplashImageView"

android:layout_gravity="center"       

> 

</ImageView>

　　3 点启动窗口动画效果后显示的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"

    /> 

</LinearLayout> 

　　

3 SplashScreen.java

这里是欢迎启动类的核心部分

public class SplashScreen extends Activity {

   /** 

     * The thread to process splash screen events 

     */

    private Thread mSplashThread;       /** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState) { 

    super.onCreate(savedInstanceState);    // Splash screen view 

    setContentView(R.layout.splash); 

     

        // Start animating the image 

    final ImageView splashImageView = (ImageView) findViewById(R.id.SplashImageView); 

    splashImageView.setBackgroundResource(R.drawable.flag); 

    final AnimationDrawable frameAnimation = (AnimationDrawable)splashImageView.getBackground(); 

    splashImageView.post(new Runnable(){ public void run() { 

frameAnimation.start();        

}            

    }); 

         

     

    final SplashScreen sPlashScreen = this;   

     

    // The thread to wait for splash screen events 

    mSplashThread =  new Thread(){ 

    @Override

    public void run(){ 

    try { 

    synchronized(this){ 

    // Wait given period of time or exit on touch 

    wait(5000); 

    } 

    } 

    catch(InterruptedException ex){    

    }finish(); 

     

    // Run next activity 

    Intent intent = new Intent(); 

    intent.setClass(sPlashScreen, MainActivity.class); 

    startActivity(intent); 

    stop();     

    } 

    }; 

     

    mSplashThread.start(); 

     

}@Override

public boolean onCreateOptionsMenu(Menu menu){ 

super.onCreateOptionsMenu(menu); 

return false; 

} 

   

    /** 

     * Processes splash screen touch events 

     */

    @Override

    public boolean onTouchEvent(MotionEvent evt) 

    { 

    if(evt.getAction() == MotionEvent.ACTION_DOWN) 

    { 

    synchronized(mSplashThread){ 

    mSplashThread.notifyAll(); 

    } 

    } 

    return true; 

    } 

 

　4 为了更好看，在values 目录下添加样式文件styles.xml:　

 <resources> 

<style name="Animations" parent="@android:Animation" /> 

<style name="Animations.SplashScreen"> 

        <item name="android:windowEnterAnimation">@anim/appear</item> 

        <item name="android:windowExitAnimation">@anim/disappear</item> 

    </style> 

<style name="Theme.Transparent" parent="android:Theme"> 

<item name="android:windowIsTranslucent">true</item> 

<item name="android:windowBackground">@android:color/transparent</item> 

<item name="android:windowContentOverlay">@null</item> 

<item name="android:windowNoTitle">true</item> 

<item name="android:windowIsFloating">true</item> 

<item name="android:backgroundDimEnabled">false</item> 

<item name="android:windowAnimationStyle">@style/Animations.SplashScreen</item>        

</style>        

</resources> 

　注意下这里：

<style name="Animations" parent="@android:Animation" /> 

<style name="Animations.SplashScreen"> 

        <item name="android:windowEnterAnimation">@anim/appear</item> 

        <item name="android:windowExitAnimation">@anim/disappear</item> 

    </style>

　　源码下载：http://files.cnblogs.com/feifei1010/AdvancedSplashDemo.zip

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