Android UI(继承控件)--PopupWindow设置动画

1，在res/anim 下定义popupwindow 出现和消失的动画

①出现的动画popupwindow_show.xml

1 <?xml version="1.0" encoding="utf-8"?>
2 <alpha xmlns:android="http://schemas.android.com/apk/res/android"
3     android:duration="1000"
4     android:fromAlpha="0.0"
5     android:fillAfter="true"
6     android:interpolator="@android:anim/accelerate_decelerate_interpolator"
7     android:toAlpha="1.0" >
8 </alpha>

②消失的动画popupwindow_dismiss.xml

1 <?xml version="1.0" encoding="utf-8"?>
2 <alpha xmlns:android="http://schemas.android.com/apk/res/android"
3     android:duration="1000"
4     android:fromAlpha="1.0"
5     android:fillAfter="true"
6     android:interpolator="@android:anim/accelerate_decelerate_interpolator"
7     android:toAlpha="0.0" >
9 </alpha>

2，popupwindow的动画是通过方法setAnimationStyle(R.style.popupwindow_anim_style);设置的。

所以在res/values 下的styles.xml 中添加

1 <style name="popupwindow_anim_style">
2         <item name="android:windowEnterAnimation">@anim/popupwindow_show</item>
3         <item name="android:windowExitAnimation">@anim/popupwindow_dismiss</item>
4 </style>

3，应用到代码中

mPopupWindow.setAnimationStyle(R.style.popupwindow_anim_style);
mPopupWindow.update();