后段成交动画完成表演动作 [英] Performing action after fragment transaction animation is finished

问题描述

我希望动画结束后，设置一个按钮的知名度。

I want to set a buttons visibility after the animation is finished.

这就是称之为动画：

android.support.v4.app.FragmentTransaction fAnimation = this.getActivity().getSupportFragmentManager().beginTransaction();
fAnimation.setCustomAnimations(android.R.anim.slide_in_left, R.anim.pull_out_to_left);
if (this.isVisible()) {
    fAnimation.hide(this);
    fAnimation.commit();
}

// code that will be executed when the fragment is gone (after the animation is over)

有没有什么办法可以附加一个听众知道什么时候我的片断没有了吗？

Is there any way to attach a listener to know when my fragment is gone?

推荐答案

这@nmw在他的回答实现了动画制作中加入API级别11并通过Android的支持库实现与片段将无法正常工作。

The Animators that @nmw implements in his answer were added in API Level 11 and will not work with Fragments as implemented by the Android support library.

要收听分片动画的事件，我所提供的支持库的片段类和压倒 onCreateAnimation ，附加定制AnimationListener返回的动画对象：

To listen to Fragment animation events, I extended the support library's Fragment class and overrode onCreateAnimation, attaching a custom AnimationListener to the returned Animation object:

public class MyFragment extends android.support.v4.app.Fragment {

    private static final String TAG = "MyFragment";

    @Override
    public Animation onCreateAnimation(int transit, boolean enter, int nextAnim) {

        Animation anim = AnimationUtils.loadAnimation(getActivity(), nextAnim);

        anim.setAnimationListener(new AnimationListener() {

            @Override
            public void onAnimationStart(Animation animation) {
                Log.d(TAG, "Animation started.");
                // additional functionality 
            }

            @Override
            public void onAnimationRepeat(Animation animation) {
                Log.d(TAG, "Animation repeating.");
                // additional functionality
            }

            @Override
            public void onAnimationEnd(Animation animation) {
                Log.d(TAG, "Animation ended.");
                // additional functionality
            }
        });

        return anim;
    }
}

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