IAPDemo/Libraries/cocos2d/cocos/platform/android/java/res/anim/in1500.xml

<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:fillAfter="true" > 
    <alpha 
        android:duration="1500"
        android:fromAlpha="0.0"
        android:toAlpha="0.0" /> 
</set>