Android-片段事务未运行的自定义动画

我使用的是带有支持包 v4的 Google API 8(Android 2.2)。

它不会给出任何错误或动画。

交易:

FragmentTransaction transaction = manager.beginTransaction();
transaction.replace(R.id.content, myFragment);
transaction.setCustomAnimations(R.anim.slide_in_left, R.anim.slide_out_right);
transaction.commit();

动画:

Slide _ in _ left. xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" >
<translate
android:duration="700"
android:fromXDelta="-100%"
android:toXDelta="0%" >
</translate>
</set>

Slide _ right. xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<translate
android:duration="700"
android:fromXDelta="0%"
android:toXDelta="100%" >
</translate>
</set>

有人知道这里发生了什么吗？

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最佳答案

The manager was stacking my transaction before I set the animation, so it stacks the transaction without animations (sad but true), and that occurs even if I commit the transaction after the setCustomAnimations().

The solution is to set the animations first:

FragmentTransaction transaction = manager.beginTransaction();
transaction.setCustomAnimations(R.anim.slide_in_left, R.anim.slide_out_right);
transaction.replace(R.id.content, myFragment);
transaction.commit();
小开

As suggested above, separate statements will definitely work. But the trick here is to setCustomAnimation before setting transaction type viz.add, replace, etc. else it doesn't. So, applying the same logic, method chaining also works. eg. 

getSupportFragmentManager()
.beginTransaction()
.setCustomAnimations(R.anim.a_slide_up,
R.anim.a_slide_down,
R.anim.a_slide_up,
R.anim.a_slide_down)
.add(R.id.root_layout,
MyFrag.newInstance())
.addToBackStack("MyFrag")
.commit();

Putting it here, so that someone who prefers method chaining finds it helpful. Cheers!

小开

Leaving this here as it's the most popular question. I had the same problem with fragment transaction not animating. The culprit was having the attribute android:animateLayoutChanges set to true in the containing layout.

I hope it helps someone save some time looking for a solution as it can be hard to notice when having nested layouts in different files.

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Another reason can be unnecessarily placing fragmentTransaction.show() before commit. This makes pop transitions not show on some android API versions.

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for me the problem was using Fragment.getChildFragmentManager() I switched to Fragment.getParentFragmentManager() and animations suddenly started working.


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