Android默认转场动画备忘录、动画生效时机及overridePendingTransition影响范围

全屏window、Activity默认动画

<resources>
    <style name="AppTheme" parent="Theme.XXXX">
        <item name="android:windowAnimationStyle">@style/Animation.Activity</item>
    </style>
    <style name="Animation.Activity">
        <item name="activityOpenEnterAnimation">@anim/activity_open_enter</item>
        <item name="activityOpenExitAnimation">@anim/activity_open_exit</item>
        <item name="activityCloseEnterAnimation">@anim/activity_close_enter</item>
        <item name="activityCloseExitAnimation">@anim/activity_close_exit</item>
        <item name="taskOpenEnterAnimation">@anim/task_open_enter</item>
        <item name="taskOpenExitAnimation">@anim/task_open_exit</item>
        <item name="launchTaskBehindTargetAnimation">@anim/launch_task_behind_target</item>
        <item name="launchTaskBehindSourceAnimation">@anim/launch_task_behind_source</item>
        <item name="taskCloseEnterAnimation">@anim/task_close_enter</item>
        <item name="taskCloseExitAnimation">@anim/task_close_exit</item>
        <item name="taskToFrontEnterAnimation">@anim/task_open_enter</item>
        <item name="taskToFrontExitAnimation">@anim/task_open_exit</item>
        <item name="taskToBackEnterAnimation">@anim/task_close_enter</item>
        <item name="taskToBackExitAnimation">@anim/task_close_exit</item>
        <item name="wallpaperOpenEnterAnimation">@anim/wallpaper_open_enter</item>
        <item name="wallpaperOpenExitAnimation">@anim/wallpaper_open_exit</item>
        <item name="wallpaperCloseEnterAnimation">@anim/wallpaper_close_enter</item>
        <item name="wallpaperCloseExitAnimation">@anim/wallpaper_close_exit</item>
        <item name="wallpaperIntraOpenEnterAnimation">@anim/wallpaper_intra_open_enter</item>
        <item name="wallpaperIntraOpenExitAnimation">@anim/wallpaper_intra_open_exit</item>
        <item name="wallpaperIntraCloseEnterAnimation">@anim/wallpaper_intra_close_enter</item>
        <item name="wallpaperIntraCloseExitAnimation">@anim/wallpaper_intra_close_exit</item>
        <item name="fragmentOpenEnterAnimation">@animator/fragment_open_enter</item>
        <item name="fragmentOpenExitAnimation">@animator/fragment_open_exit</item>
        <item name="fragmentCloseEnterAnimation">@animator/fragment_close_enter</item>
        <item name="fragmentCloseExitAnimation">@animator/fragment_close_exit</item>
        <item name="fragmentFadeEnterAnimation">@animator/fragment_fade_enter</item>
        <item name="fragmentFadeExitAnimation">@animator/fragment_fade_exit</item>
    </style>
</resources>

非全屏window、Activity默认动画

<style name="AppTheme" parent="Theme.XXXX">
    <item name="android:windowAnimationStyle">@style/Animation.Dialog</item>
</style>
<style name="Animation.Dialog">
    <item name="windowEnterAnimation">@anim/dialog_enter</item>
    <item name="windowExitAnimation">@anim/dialog_exit</item>
</style>

...等等 参考android/frameworks/base/core/res/res/values/styles.xml

Transition中默认动画

<resources>
    <style name="AppTheme" parent="Theme.XXXX">
        <item name="windowContentTransitions">false</item>
        <item name="windowActivityTransitions">true</item>
        <item name="windowEnterTransition">@transition/fade</item>
        <item name="windowExitTransition">@transition/slide_bottom</item>//这个不是默认的
        <item name="windowSharedElementEnterTransition">@transition/move</item>
        <item name="windowSharedElementExitTransition">@transition/move</item>
        <item name="windowAllowEnterTransitionOverlap">true</item>
        <item name="windowAllowReturnTransitionOverlap">true</item>
    </style>
</resources>

生效时机，及overridePendingTransition影响范围

Android7.0 (Pixel XL API24 x86_64)
1、同一Task，以下四个动画生效
       activityOpenEnterAnimation/activityOpenExitAnimation
       activityCloseEnterAnimation/activityCloseExitAnimation
   例如：
        Activity1启动Activity2
             Acivity1使用Activity2的styles.xml中声明的activityOpenExitAnimation
             Acivity2使用Activity2的styles.xml中声明的activityOpenEnterAnimation
        Activity2返回Activity1
             Acivity1使用Activity1的styles.xml中声明的activityCloseEnterAnimation
             Acivity2使用Activity1的styles.xml中声明的activityCloseExitAnimation
2、不同Task(设置了SingleInstance或两个应用)，以下四个动画生效
        taskOpenEnterAnimation/taskOpenExitAnimation
        taskCloseEnterAnimation/taskCloseExitAnimation
   例如：
        应用1的Activity1启动应用2的Activity2
             Acivity1使用Activity2的styles.xml中声明的taskOpenExitAnimation
             Acivity2使用Activity2的styles.xml中声明的taskOpenEnterAnimation
        应用2的Activity2返回应用1的Activity1
             Acivity1使用Activity1的styles.xml中声明的taskCloseEnterAnimation
             Acivity2使用Activity1的styles.xml中声明的taskCloseExitAnimation
3、不同Task，当Task被move到顶层或底层时{例如:重写finish()，在finish()方法中调moveTaskToBack(true)
   }，以下四个动画生效
        taskToFrontEnterAnimation/taskToFrontExitAnimation
        taskToBackEnterAnimation/taskToBackExitAnimation
   例如：
        Activity2设置了启动模式为SingleInstance
        Activity1启动Activity2
             Acivity1使用Activity2的styles.xml中声明的taskToFrontExitAnimation
             Acivity2使用Activity2的styles.xml中声明的taskToFrontEnterAnimation
        Activity2返回Activity1
             Acivity1使用Activity1的styles.xml中声明的taskToBackEnterAnimation
             Acivity2使用Activity1的styles.xml中声明的taskToBackExitAnimation
4、当Activity设置了<item name="android:windowShowWallpaper">true</item>
   (1、2、3)中的动画将不生效，以下八个动画生效
        wallpaperOpenEnterAnimation/wallpaperOpenExitAnimation
        wallpaperCloseEnterAnimation/wallpaperCloseExitAnimation
        wallpaperIntraOpenEnterAnimation/wallpaperIntraOpenEnterAnimation
        wallpaperIntraCloseEnterAnimation/wallpaperIntraCloseExitAnimation
   例如：
        情景1：Activity1设置了<item name="android:windowShowWallpaper">true</item>
        Activity1启动Activity2
             Acivity1使用Activity2的styles.xml中声明的wallpaperCloseExitAnimation
             Acivity2使用Activity2的styles.xml中声明的wallpaperCloseEnterAnimation
        Activity2返回Activity1
             Acivity1使用Activity1的styles.xml中声明的wallpaperOpenEnterAnimation
             Acivity2使用Activity1的styles.xml中声明的wallpaperOpenExitAnimation

        情景2：Activity2设置了<item name="android:windowShowWallpaper">true</item>
        Activity1启动Activity2
             Acivity1使用Activity2的styles.xml中声明的wallpaperOpenExitAnimation
             Acivity2使用Activity2的styles.xml中声明的wallpaperOpenEnterAnimation
        Activity2返回Activity1
             Acivity1使用Activity1的styles.xml中声明的wallpaperCloseEnterAnimation
             Acivity2使用Activity1的styles.xml中声明的wallpaperCloseExitAnimation

        情景3：Activity1、Activity2同时设置了<item name="android:windowShowWallpaper">true</item>
        Activity1启动Activity2
             Acivity1使用Activity2的styles.xml中声明的wallpaperIntraOpenExitAnimation
             Acivity2使用Activity2的styles.xml中声明的wallpaperIntraOpenEnterAnimation
        Activity2返回Activity1
             Acivity1使用Activity1的styles.xml中声明的wallpaperIntraCloseEnterAnimation
             Acivity2使用Activity1的styles.xml中声明的wallpaperIntraCloseExitAnimation

5、overridePendingTransition(int enterAnim, int exitAnim);
   会覆盖掉以上（1、2、3、4）通过windowAnimationStyle声明的动画，
   但无法覆盖5.0后的Transition{startActivity(intent, options.toBundle())};
6、遗留问题：FallbackHome启动launcher时，launcher的动画wallpaperCloseEnterAnimation去不掉
   ，只能用overridePendingTransition(0, 0);原因不明

附录 SingleTask与SingleInstance

SingleTask：标注的Activity在被自身的app调用时，不新建task。当已存在的SingleTask界面被切换到前台时，
SingleTask界面之后开启的其他界面会被关闭
SingleInstance：新建task