andriod一个不错的启动菜单显示屏动画效果

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>

4 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>