PopupWindow 动画显示与消失（逐惭缩放、逐惭透明）

下文来自：

http://gundumw100.iteye.com/blog/924891

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popwindow通过setAnimationStyle(int animationStyle)函数来设置动画效果
android:windowEnterAnimation表示进入窗口动画
android:windowExitAnimation表示窗口退出动画

在res/values/style.xml代码：
Xml代码

<?xmlversion="1.0"encoding="utf-8"?>
<resources>
<mce:stylename="PopupAnimation"parent="android:Animation"><!--
<itemname="android:windowEnterAnimation">@anim/popup_enter</item>
<itemname="android:windowExitAnimation">@anim/popup_exit</item>
--></mce:style><stylename="PopupAnimation"parent="android:Animation"mce_bogus="1"><itemname="android:windowEnterAnimation">@anim/popup_enter</item>
<itemname="android:windowExitAnimation">@anim/popup_exit</item>
</style>
</resources>

<?xml version="1.0" encoding="utf-8"?>  <resources>         <mce:style name="PopupAnimation" parent="android:Animation"><!--          <item name="android:windowEnterAnimation">@anim/popup_enter</item>          <item name="android:windowExitAnimation">@anim/popup_exit</item>        --></mce:style><style name="PopupAnimation" parent="android:Animation" mce_bogus="1">        <item name="android:windowEnterAnimation">@anim/popup_enter</item>          <item name="android:windowExitAnimation">@anim/popup_exit</item>      </style>  </resources>

在res/anim/popup_enter.xml声明所需进入动画
Xml代码

<?xmlversion="1.0"encoding="utf-8"?>
<setxmlns:android="http://schemas.android.com/apk/res/android">
<scaleandroid:fromXScale="0.6"android:toXScale="1.0"
android:fromYScale="0.6"android:toYScale="1.0"android:pivotX="50%"
android:pivotY="50%"android:duration="1000"/>
<alphaandroid:interpolator="@android:anim/decelerate_interpolator"
android:fromAlpha="0.0"android:toAlpha="1.0"android:duration="1000"/>
</set>

<?xml version="1.0" encoding="utf-8"?>      <set xmlns:android="http://schemas.android.com/apk/res/android">      <scale android:fromXScale="0.6" android:toXScale="1.0"          android:fromYScale="0.6" android:toYScale="1.0" android:pivotX="50%"          android:pivotY="50%" android:duration="1000" />      <alpha android:interpolator="@android:anim/decelerate_interpolator"          android:fromAlpha="0.0" android:toAlpha="1.0" android:duration="1000" />  </set>

在res/anim/popup_exit.xml声明所需退出动画
Xml代码

<?xmlversion="1.0"encoding="utf-8"?>
<setxmlns:android="http://schemas.android.com/apk/res/android">
<scale
android:fromXScale="1.0"
android:toXScale="0.5"
android:fromYScale="1.0"
android:toYScale="0.5"
android:pivotX="50%"
android:pivotY="50%"
android:duration="500"/>
<alpha
android:interpolator="@android:anim/accelerate_interpolator"
android:fromAlpha="1.0"
android:toAlpha="0.0"
android:duration="500"/>
</set>

<?xml version="1.0" encoding="utf-8"?>  <set xmlns:android="http://schemas.android.com/apk/res/android">      <scale          android:fromXScale="1.0"          android:toXScale="0.5"          android:fromYScale="1.0"          android:toYScale="0.5"          android:pivotX="50%"          android:pivotY="50%"          android:duration="500" />      <alpha          android:interpolator="@android:anim/accelerate_interpolator"          android:fromAlpha="1.0"          android:toAlpha="0.0"          android:duration="500" />  </set>

设置popwindow的位置及动画

popupWindow.setAnimationStyle(R.style.PopupAnimation);
popupWindow.showAtLocation(findViewById(R.id.parent), Gravity.CENTER| Gravity.CENTER, 0, 0);
popupWindow.update();

调用popupWindow.dismiss();语句。popwindow消失，自动调用消失动画popup_exit.xml

activity切换动画

public void onClick(View v) {
Intent intent = new Intent(ActivityAnim.this,ActivityTwo.class);
startActivity(intent);
overridePendingTransition(R.anim.act_enter,R.anim.act_exit);
}

overridePendingTransition(int ,int)函数，第一个参数为activity显示动画，第二个参数为退出动画，两个动画的xml文件存放在anim文件夹下

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