Android - 调用活动完成的共享元素转换（） [英] Android - Shared element transitions with calling activity finish()

问题描述

我正在努力使应用程序更具实质性，而我只是坚持如何实现一些共享元素转换。我有一个活动A，它启动另一个B然后调用finish（）以便从后栈中删除它。在我的情况下，我有一个我想在两个活动之间分享的元素，但是一旦它从A传递到B，A就不再重要了。
如果我在startActivity（ctx，intent，bundle）之后没有调用finish（），则退出/输入动画效果很好。但是，如果我打电话给完成，那么在动画开始之前就会出现一个非常丑陋的闪烁。

I'm working on making an application more Material and I'm just stuck on how to implement some shared element transitions. I have an activity A that starts another B and then calls finish() in order to remove it from the back stack. In my case I have an element I want to share between the two activities, but once it is passed from A to B, A no longer matters. If I don't call finish() after startActivity(ctx,intent, bundle) the exit/enter animation works perfectly. However, if I do call finish, there's a really ugly flicker before the animation starts.

我有什么东西可以忽略或是不可能做到我我试图做什么？

Is there something I'm overlooking or is it just not possible to do what I am trying to do?

推荐答案

如果您只希望在转换时发生这种情况，您可以在onStop函数中完成您的活动从A到B然后创建一个标志并在调用startActivity（ctx，intent，bundle）后设置它：

You can finish your activity in the onStop function, if you only want this to happen when you transition from A to B then create a flag and set it after you call startActivity(ctx,intent, bundle):

@Override
public void onStop() {
    super.onStop();
    if(mShouldFinish)
         finish();
}

确保完成活动B后调用finish（）而不是finishAfterTranstion（），因为活动A不再存在

Make sure when you are done with activity B to call finish() and not finishAfterTranstion() since activity A is no longer there

完成活动A后，如果按回，B中的共享元素可能会挂起。在 ActivityB.onEnterAnimationComplete 中将transitionName设置为null以避免这种情况。

After finishing the activity A, shared element in B might hang in screen if you press back. Set transitionName to null in ActivityB.onEnterAnimationComplete to avoid this.

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