如何制作固定屏幕和新屏幕的幻灯片动画? [英] How to make slide animation with a fixed screen and new screen?

问题描述

我为过渡制作了三个 xml 文件.

I made three xml files for the transition.

enter_from_right.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate
        android:duration="@android:integer/config_mediumAnimTime"
        android:fromXDelta="0%"
        android:fromYDelta="0%"
        android:toXDelta="0%"
        android:toYDelta="0%" />
</set>

none.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate
        android:duration="@android:integer/config_mediumAnimTime"
        android:fromXDelta="100%"
        android:fromYDelta="0%"
        android:toXDelta="0%"
        android:toYDelta="0%" />
</set>

exit_to_right.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate
        android:duration="@android:integer/config_mediumAnimTime"
        android:fromXDelta="0%"
        android:fromYDelta="0%"
        android:toXDelta="100%"
        android:toYDelta="0%" />
</set>

但是，它在 Activities 中工作正常，而不在 Fragments 中.

However, It just works fine in Activities not in Fragments.

当我单击后退按钮时，向后过渡(pop)工作正常.但是当我调用新片段时它不能正常工作.它只是在屏幕变化时闪烁.

When I click the back button, the backward transition(pop) works fine. But it doesn't work properly when I call the new fragment. It just blinks when the screen changes.

我尝试将 none.xml 的持续时间更改为 50.我看到新屏幕从右侧进入.也试过10000.但它只是延迟了更改时间.

I tried changing the duration to 50 of none.xml. And I see the new screen comes in from the right side. And also tried with 10000. But it just delays the changing time.

我正在使用导航组件.我是这样定义的:

I am using navigation component. And I defined like this:

        <action
            android:id="@+id/action_initFragment_to_settingFragment"
            app:destination="@id/settingFragment"
            app:enterAnim="@anim/enter_from_right"
            app:exitAnim="@anim/none"
            app:popExitAnim="@anim/exit_to_right"
            app:popEnterAnim="@anim/none"/>

这是怎么回事?我认为这是因为 Z 索引.有没有办法给Z索引属性?

What's wrong with it? I think this is because of Z index. Is there any way to give Z index attribute?

推荐答案

发生这种情况是因为 z 索引.活动有不同的深度.但是，我猜 Fragments 具有相同的深度.因此，当 A Fragment 切换到 B Fragment 时，它们处于相同的深度并且过渡显示不正确.

This happened because of the z index. Activities have different depth. However, I guess Fragments have the same depth. So, When A Fragment is switched to B Fragment, They are on the same depth and transition is not shown properly.

解决方案是以编程方式为屏幕提供 Z 索引，如下所示:

The solution is giving Z index to the screen programmatically like below:

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        ViewCompat.setTranslationZ(view, 1F)
    }

1F 这里是深度的索引.

有趣的是，更高的值会产生更大的阴影.如果你给 100F，那么它会在下面产生巨大的阴影.当值为 1F 时，我看不到任何明显的阴影.

The interesting thing is the higher value creates the bigger shadow. If you give 100F, then it creates huge shadow underneath. And I can't see any shadows visibly when the value is 1F.

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