andriod一个不错的启动菜单显示屏动画效果

效果图：



[align=left]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。[/align]
[align=left]2 splash.xml:[/align]

<?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>

　　

[align=left]3 SplashScreen.java[/align]
[align=left]这里是欢迎启动类的核心部分[/align]

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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