Java 安卓：按钮动画

在我的主要活动中，我有一个

FrameLayout

容器，用于

片段

Fragment2 fragment = new Fragment2();
setSharedElementReturnTransition(TransitionInflater.from(getActivity()).inflateTransition(R.transition.change_image_trans));
setExitTransition(TransitionInflater.from(getActivity()).inflateTransition(android.R.transition.fade));
fragment.setSharedElementEnterTransition(TransitionInflater.from(getActivity()).inflateTransition(R.transition.change_image_trans));
fragment.setEnterTransition(TransitionInflater.from(getActivity()).inflateTransition(android.R.transition.fade));

FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction()
        .replace(R.id.button_container, fragment)
        .addToBackStack("transaction")
        .addSharedElement(view, "button_transition")
        .commit();

其中一个

片段

是普通的矩形

按钮

，另一个是圆形

按钮

（两个按钮的高度相同）

Fragment2 fragment = new Fragment2();
setSharedElementReturnTransition(TransitionInflater.from(getActivity()).inflateTransition(R.transition.change_image_trans));
setExitTransition(TransitionInflater.from(getActivity()).inflateTransition(android.R.transition.fade));
fragment.setSharedElementEnterTransition(TransitionInflater.from(getActivity()).inflateTransition(R.transition.change_image_trans));
fragment.setEnterTransition(TransitionInflater.from(getActivity()).inflateTransition(android.R.transition.fade));

FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction()
        .replace(R.id.button_container, fragment)
        .addToBackStack("transaction")
        .addSharedElement(view, "button_transition")
        .commit();

当我单击

按钮时

我希望矩形

按钮

转换为圆形

按钮

如下：

Fragment2 fragment = new Fragment2();
setSharedElementReturnTransition(TransitionInflater.from(getActivity()).inflateTransition(R.transition.change_image_trans));
setExitTransition(TransitionInflater.from(getActivity()).inflateTransition(android.R.transition.fade));
fragment.setSharedElementEnterTransition(TransitionInflater.from(getActivity()).inflateTransition(R.transition.change_image_trans));
fragment.setEnterTransition(TransitionInflater.from(getActivity()).inflateTransition(android.R.transition.fade));

FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction()
        .replace(R.id.button_container, fragment)
        .addToBackStack("transaction")
        .addSharedElement(view, "button_transition")
        .commit();

Fragment2 fragment = new Fragment2();
setSharedElementReturnTransition(TransitionInflater.from(getActivity()).inflateTransition(R.transition.change_image_trans));
setExitTransition(TransitionInflater.from(getActivity()).inflateTransition(android.R.transition.fade));
fragment.setSharedElementEnterTransition(TransitionInflater.from(getActivity()).inflateTransition(R.transition.change_image_trans));
fragment.setEnterTransition(TransitionInflater.from(getActivity()).inflateTransition(android.R.transition.fade));

FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction()
        .replace(R.id.button_container, fragment)
        .addToBackStack("transaction")
        .addSharedElement(view, "button_transition")
        .commit();

这是我目前拥有的代码：

Fragment2 fragment = new Fragment2();
setSharedElementReturnTransition(TransitionInflater.from(getActivity()).inflateTransition(R.transition.change_image_trans));
setExitTransition(TransitionInflater.from(getActivity()).inflateTransition(android.R.transition.fade));
fragment.setSharedElementEnterTransition(TransitionInflater.from(getActivity()).inflateTransition(R.transition.change_image_trans));
fragment.setEnterTransition(TransitionInflater.from(getActivity()).inflateTransition(android.R.transition.fade));

FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction()
        .replace(R.id.button_container, fragment)
        .addToBackStack("transaction")
        .addSharedElement(view, "button_transition")
        .commit();

问题是，当我单击按钮时，它会变成椭圆形，然后变成圆形按钮，但当我单击“后退”按钮时，动画是平滑的

Fragment2 fragment = new Fragment2();
setSharedElementReturnTransition(TransitionInflater.from(getActivity()).inflateTransition(R.transition.change_image_trans));
setExitTransition(TransitionInflater.from(getActivity()).inflateTransition(android.R.transition.fade));
fragment.setSharedElementEnterTransition(TransitionInflater.from(getActivity()).inflateTransition(R.transition.change_image_trans));
fragment.setEnterTransition(TransitionInflater.from(getActivity()).inflateTransition(android.R.transition.fade));

FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction()
        .replace(R.id.button_container, fragment)
        .addToBackStack("transaction")
        .addSharedElement(view, "button_transition")
        .commit();

---

因此，如何将其更正为上述示例中的样子，或类似的示例（我只需要按钮动画）。

我很久以前就解决了这个问题，但似乎我正在对此进行投票，因此如果有人感兴趣，请在评论中告诉我，我将发布其代码。

Fragment2 fragment = new Fragment2();
setSharedElementReturnTransition(TransitionInflater.from(getActivity()).inflateTransition(R.transition.change_image_trans));
setExitTransition(TransitionInflater.from(getActivity()).inflateTransition(android.R.transition.fade));
fragment.setSharedElementEnterTransition(TransitionInflater.from(getActivity()).inflateTransition(R.transition.change_image_trans));
fragment.setEnterTransition(TransitionInflater.from(getActivity()).inflateTransition(android.R.transition.fade));

FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction()
        .replace(R.id.button_container, fragment)
        .addToBackStack("transaction")
        .addSharedElement(view, "button_transition")
        .commit();