弹出的片段backstack不播放流行音乐，动漫

问题描述

我推了碎片堆碎片使用以下code：

I push a fragment on the fragment stack using the following code:

FragmentManager fragmentManager = getActivity().getSupportFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.setCustomAnimations(R.anim.slide_in_right, R.anim.slide_out_right,
     R.anim.slide_in_left, R.anim.slide_out_left);
fragmentTransaction.replace(getId(), newFragment);
fragmentTransaction.addToBackStack(null);
fragmentTransaction.commit();

此方式，当片段栈被弹出，如由pressing后退按钮，一个片段弹出播放动画。然而，有些情况下，我想弹出片段backstack而不显示此动画，如因为我刚刚从另一项活动回来，要显示的previous片段一次，没有动画。

This way, when the fragment stack is popped, e.g. by pressing the back button, a fragment pop animation is played. However, there are situations in which i would like to pop the fragment backstack without showing this animation, e.g. because I just returned from another activity and want to display the previous fragment at once, without animation.

这是实例导航可能看起来是这样的：

An example navigation could look like this:

• 在用户的开始屏幕的根片段
在
• 他选择的根片段然后显示一个新的片段，表明项目的详细信息的一个项目。它使用一个特定片段的事务，设置动画，无论是推，并在弹出的情况下（这样，当用户presses后退按钮时，过渡动画）
• 从这个片段，他开始它（无论何种原因）将删除刚刚显示的项目活动
• 当本次活动结束后，我想返回到根片段，而不显示弹出动画的细节片段的

有没有办法弹出片段backstack不播放指定的流行动漫？

Is there a way to pop the fragment backstack without playing the specified pop animation?

推荐答案

所以Warpzit是在正确的轨道上，他只是没有解决您的具体问题太清楚了。我遇到了完全一样的问题，这是我如何解决它。

So Warpzit was on the right track, he just didn't address your specific issue too well. I came across the exact same issue and here is how I solved it.

首先，我创建了一个静态布尔变量（为简单起见，让我们把它放在FragmentUtils类）...

First I created a static boolean variable (for simplicity's sake, lets put it in the FragmentUtils class)...

public class FragmentUtils {
    public static boolean sDisableFragmentAnimations = false;
}

然后，在每一个片段，你有，你需要重写onCreateAnimation方法...

Then, in EVERY fragment you have, you need to override the onCreateAnimation method...

@Override
public Animation onCreateAnimation(int transit, boolean enter, int nextAnim) {
    if (FragmentUtils.sDisableFragmentAnimations) {
        Animation a = new Animation() {};
        a.setDuration(0);
        return a;
    }
    return super.onCreateAnimation(transit, enter, nextAnim);
}

然后，当你需要清除backstack从你的活动只是执行下列操作...

Then, when you need to clear the backstack from your activity simply do the following...

public void clearBackStack() {
    FragmentUtils.sDisableFragmentAnimations = true;
    getSupportFragmentManager().popBackStackImmediate(null, FragmentManager.POP_BACK_STACK_INCLUSIVE);
    FragmentUtils.sDisableFragmentAnimations = false;
}

瞧，调用clearBackStack（）将下降回到根碎片，没有任何过渡动画。

And voila, a call to clearBackStack() will drop you back into the root fragment without any transition animations.

希望大G将增加在未来这样做的少笨的办法。

Hopefully the big G will add a less stupid way of doing this in the future.

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