自定义 Dialog 显示隐藏动画

默认的 Dialog 在调用 show 方法显示时是没有任何动画的，如果需要为 Dialog 添加显示隐藏动画，可使用如下方式：

1、初始化 Dialog 并设置 windowAnimations

Dialog dialog = new Dialog(this)
// or
Dialog dialog = new AlertDialog.Builder(this).create();

dialog.getWindow().getAttributes().windowAnimations = R.style.PauseDialogAnimation;

2、Dialog 动画资源配置

<style name="PauseDialogAnimation">
    <item name="android:windowEnterAnimation">@anim/slide_up</item>
    <item name="android:windowExitAnimation">@anim/slide_down</item>
</style>

3、动画文件

slide_up.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
     android:duration="@android:integer/config_mediumAnimTime">
    <translate
        android:fromYDelta="100%p"
        android:interpolator="@android:anim/accelerate_interpolator"
        android:toXDelta="0%p"/>
    <alpha
        android:fromAlpha="0"
        android:toAlpha="1"/>
</set>

slide_down.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
     android:duration="@android:integer/config_mediumAnimTime">
    <translate

        android:fromYDelta="0%p"
        android:interpolator="@android:anim/accelerate_interpolator"
        android:toYDelta="100%p"/>

    <alpha
        android:fromAlpha="1"
        android:toAlpha="0"/>
</set>

Over~

参考

• Up down animation for dialog fragment
• android - Animate a custom Dialog - Stack Overflow

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