如何将android中的动画添加到popBackStack？

我有一个片段，我弹回到另一个片段，像这样：

 final FragmentManager fm = getParentFragmentManager();
 fm.popBackStack(myFirstFragment.LOG_TAG, FragmentManager.POP_BACK_STACK_INCLUSIVE);

现在，片段消失了，而不是带着一个过渡返回

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如何为弹出的内容添加客户动画？

只需从FragmentTransaction调用.setCustomAnimations方法即可

FragmentTransaction ft = getFragmentManager().beginTransaction();
ft.setCustomAnimations(android.R.animator.fade_in, android.R.animator.fade_out, android.R.animator.fade_in, android.R.animator.fade_out);

对于自定义动画，创建一个

fade_in.xml

和

fade_out.xml

并调用它，而不是

android.R.animatior.fade_in

和

android.R.animatior.fade_out

淡入.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" android:interpolator="@android:anim/linear_interpolator">
   <alpha
        android:duration="2000"
        android:fromAlpha="0.1"
        android:toAlpha="1.0">
    </alpha>
</set>

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:interpolator="@android:anim/linear_interpolator">
    <alpha
        android:duration="2000"
        android:fromAlpha="1.0"
        android:toAlpha="0.1" >
    </alpha>
</set>

.
您只需从FragmentTransaction调用.setCustomAnimations方法即可完成此操作

FragmentTransaction ft = getFragmentManager().beginTransaction();
ft.setCustomAnimations(android.R.animator.fade_in, android.R.animator.fade_out, android.R.animator.fade_in, android.R.animator.fade_out);

对于自定义动画，创建一个
fade_in.xml
和
fade_out.xml
并调用它，而不是
android.R.animatior.fade_in
和
android.R.animatior.fade_out

淡入.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" android:interpolator="@android:anim/linear_interpolator">
   <alpha
        android:duration="2000"
        android:fromAlpha="0.1"
        android:toAlpha="1.0">
    </alpha>
</set>

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:interpolator="@android:anim/linear_interpolator">
    <alpha
        android:duration="2000"
        android:fromAlpha="1.0"
        android:toAlpha="0.1" >
    </alpha>
</set>


.
JAVA

 Fragment fragment = new FragmentB();
    getSupportFragmentManager().beginTransaction()
        .setCustomAnimations(
            R.anim.slide_in,  // enter
            R.anim.fade_out,  // exit
            R.anim.fade_in,   // popEnter
            R.anim.slide_out  // popExit
        )
        .replace(R.id.fragment_container, fragment)
        .addToBackStack(null)
        .commit();

KOTLIN

val fragment = FragmentB()
supportFragmentManager.commit {
    setCustomAnimations(
        enter = R.anim.slide_in,
        exit = R.anim.fade_out,
        popEnter = R.anim.fade_in,
        popExit = R.anim.slide_out
    )
    replace(R.id.fragment_container, fragment)
    addToBackStack(null)
}

欲了解更多信息，请阅读：
JAVA

 Fragment fragment = new FragmentB();
    getSupportFragmentManager().beginTransaction()
        .setCustomAnimations(
            R.anim.slide_in,  // enter
            R.anim.fade_out,  // exit
            R.anim.fade_in,   // popEnter
            R.anim.slide_out  // popExit
        )
        .replace(R.id.fragment_container, fragment)
        .addToBackStack(null)
        .commit();

KOTLIN

val fragment = FragmentB()
supportFragmentManager.commit {
    setCustomAnimations(
        enter = R.anim.slide_in,
        exit = R.anim.fade_out,
        popEnter = R.anim.fade_in,
        popExit = R.anim.slide_out
    )
    replace(R.id.fragment_container, fragment)
    addToBackStack(null)
}

欲了解更多信息，请阅读：