带有空共享元素的Conent Transition NPE [英] Conent Transition NPE with empty shared elements

问题描述

我正在将内容过渡添加到一个非常大的应用程序中，并且在大多数情况下，我没有任何共享元素，但仍想使用过渡动画.我已将问题归结为以下代码行:

I am adding content transitions to a pretty large app and in most cases I do not have any shared elements but still want to use the transition animations. I have tracked the problem down to this line of code:

ActivityOptionsCompat.makeSceneTransitionAnimation(activity, ????);

我尝试将Pair array设置为null或一个空数组，并且尝试将其遗漏.一切都会导致以下错误:

I have tried setting Pair array to null or an empty array and I have tried just leaving it out. Everything results in the following error:

java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.ViewRootImpl.setPausedForTransition(boolean)' on a null object reference

但是，我仅在Android 6.0+上出现此错误，它在任何版本的Android 5上都可以正常工作.我是否尝试以错误的方式执行此操作?

However, I only get this error on Android 6.0+, it works fine on any version of Android 5. Am I trying to do this the wrong way?

推荐答案

我在源代码中做了很多挖掘，看来这是由

I did a bunch of digging in the source code and it looks like this is caused by a missed null pointer check that got fixed for Nougat.

不幸的是，我不知道如何在6.x上解决它.我想您可以添加6.x try/catch，如果它确实在崩溃方面使您丧命，但是这可能还会捕获许多您可能不希望看到的其他内容.

I've got no clue how to work around it on 6.x though, unfortunately. I suppose you could add a 6.x try/catch if it's really killing you in terms of crashes, but that may also catch a bunch of other stuff you may not want it to.

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