場(chǎng)景:

• A打開B頁面恩闻，A頁面保持不動(dòng)，B頁面從底部滑入顯示
• B返回A頁面剧董，A頁面保持不動(dòng), B頁面從頂部向下滑出消失

1:通過Theme的windowAnimationStyle屬性實(shí)現(xiàn)

<style name="Kt.DownIn" parent="Theme.AppCompat.Light.NoActionBar">
        <item name="android:windowContentOverlay">@null</item>
        <item name="android:windowIsTranslucent">false</item>
        <item name="android:windowBackground">@android:color/transparent</item>
        <item name="android:windowAnimationStyle">@style/AudioPlayAnim</item>
    </style>

    <style name="AudioPlayAnim" parent="@android:style/Animation.Activity">
        <!--馬上要進(jìn)入到的Activity的動(dòng)畫,頁面B-->
        <item name="android:activityOpenEnterAnimation">@anim/anim_bottom_in</item>
        <!--馬上要推到后臺(tái)或者finish的Activity的動(dòng)畫,頁面A-->
        <item name="android:activityOpenExitAnimation">@anim/anim_no</item>
        <!--退出即將回到的Activity的動(dòng)畫,頁面A-->
        <item name="android:activityCloseEnterAnimation">@anim/anim_no</item>
        <!--當(dāng)前即將finish退出的Activity的動(dòng)畫,頁面B-->
        <item name="android:activityCloseExitAnimation">@anim/anim_bottom_out</item>
    </style>

使用過程用幢尚，如果沒有設(shè)置android:activityOpenExitAnimation和android:activityCloseEnterAnimation這兩個(gè)A頁面的消失動(dòng)畫，就可能會(huì)出現(xiàn)短暫的黑屏交互現(xiàn)象;
如果theme設(shè)置windowIsTranslucent為true,則建議繼承Animation.Translucen,否則動(dòng)畫可能不生效,如下:

    <style name="AudioPlayAnim" parent="@android:style/Animation.Translucen">
        <item name="android:windowEnterAnimation">@anim/anim_bottom_in</item>
        <item name="android:windowExitAnimation">@anim/anim_bottom_out</item>
        <!--馬上要進(jìn)入到的Activity的動(dòng)畫,頁面B-->
        <item name="android:activityOpenEnterAnimation">@anim/anim_bottom_in</item>
        <!--馬上要推到后臺(tái)或者finish的Activity的動(dòng)畫,頁面A-->
        <item name="android:activityOpenExitAnimation">@anim/anim_no</item>
        <!--退出即將回到的Activity的動(dòng)畫,頁面A-->
        <item name="android:activityCloseEnterAnimation">@anim/anim_no</item>
        <!--當(dāng)前即將finish退出的Activity的動(dòng)畫,頁面B-->
        <item name="android:activityCloseExitAnimation">@anim/anim_bottom_out</item>
    </style>

另外一種解決windowIsTranslucent為true的時(shí)候翅楼，動(dòng)畫效果不生效的方案:

open var activityCloseEnterAnimation: Int = 0
open var activityCloseExitAnimation: Int = 0
    
   override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        initWindowAnimAttr()
    }

    @SuppressLint("ResourceType")
    private fun initWindowAnimAttr() {
        try {
            var activityStyle = theme.obtainStyledAttributes(intArrayOf(R.attr.windowAnimationStyle))
            val windowAnimationStyleResId = activityStyle.getResourceId(0, 0)
            activityStyle.recycle()
            activityStyle = theme.obtainStyledAttributes(windowAnimationStyleResId, intArrayOf(R.attr.activityCloseEnterAnimation, R.attr.activityCloseExitAnimation))
            activityCloseEnterAnimation = activityStyle.getResourceId(0, 0)
            activityCloseExitAnimation = activityStyle.getResourceId(1, 0)
            activityStyle.recycle()
        } catch (e: Exception) {
        }
    }

     override fun finish() {
        super.finish()
        isDestroy = true
        overridePendingTransition(activityCloseEnterAnimation, activityCloseExitAnimation)
    }

anim_bottom_in, anim_no以及anim_bottom_out的動(dòng)畫文件如下

!---anim_bottom_in
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate
        android:duration="300"
        android:fromYDelta="100%"
        android:interpolator="@android:anim/decelerate_interpolator"
        android:toYDelta="0" />
</set>

!---anim_no
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate
        android:duration="300"http://一定要設(shè)置跟進(jìn)入動(dòng)畫相同的時(shí)間尉剩，解決黑屏的關(guān)鍵
        android:fromYDelta="0"
        android:interpolator="@android:anim/decelerate_interpolator"
        android:toYDelta="0" />
</set>

!---anim_bottom_out
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate
        android:duration="300"
        android:fromYDelta="0"
        android:interpolator="@android:anim/decelerate_interpolator"
        android:toYDelta="100%" />
</set>

2: 通過overridePendingTransition實(shí)現(xiàn)效果

在頁面B的onCreate方法和finish方法中加入以下代碼

override fun onCreate(savedInstanceState: Bundle?) {
  super.onCreate(savedInstanceState)
  overridePendingTransition(R.anim.anim_bottom_in,R.anim.anim_no)
}
//重寫finish方法
override fun finish() {
 super.finish() 
 overridePendingTransition(R.anim.anim_no,R.anim.anim_bottom_out)
}

同樣anim_no頁面的消失動(dòng)畫一定要設(shè)置