这部动画到底是怎么回事？

Question

我正在使用来自共享元素库的 makeSceneTransitionAnimation API 调用将折叠工具栏 header 中的图像共享到详细视图 activity。忽略 FAB 看起来不合适的地方，如果我能让它看起来更好，我打算将它们滑出动画的一部分。

看起来很可怕：https://youtu.be/Js91TAvwrV0

代码如下：

CollapsingToolbar Sender:

@TargetApi(Build.VERSION_CODES.LOLLIPOP)
public void LollipopTransition(View v) throws IOException {
    Log.d("The Jones Theory", "LollipopTransition...");
    ImageView imgFavorite = (ImageView) findViewById(R.id.header);
    final View nestedContent = findViewById(R.id.nested_content);
    hideView(nestedContent);
    startActivity(intent, ActivityOptions.makeSceneTransitionAnimation(PostSelectedActivity.this, imgFavorite, "photo_hero").toBundle());
}

DetailView Receiver:

getWindow().getEnterTransition().addListener(new Transition.TransitionListener() {
        @Override
        public void onTransitionStart(Transition transition) {
        }

        @Override
        public void onTransitionCancel(Transition transition) {
        }

        @Override
        public void onTransitionPause(Transition transition) {
        }

        @Override
        public void onTransitionResume(Transition transition) {
        }

        @Override
        public void onTransitionEnd(Transition transition) {
            getWindow().getEnterTransition().removeListener(this);

            // load the full version, crossfading from the thumbnail image
            Ion.with(photoView)
                    .crossfade(true)
                    .deepZoom()
                    .load(PostImage);

        }

Answer 1

我记得有过类似的问题。从文档的某些部分看来，changeImageTransform 应该足够了（而且我认为在某些版本中它确实看起来不错）但是尝试将 changeBounds 添加到您的 transitionSet here 以获得此：

<transitionSet xmlns:android="http://schemas.android.com/apk/res/android">
<changeImageTransform/>
<changeBounds/>
</transitionSet>

documentation for changeImageTransform 现在说

In combination with ChangeBounds, ChangeImageTransform allows ImageViews that change size, shape, or ImageView.ScaleType to animate contents smoothly.

这部动画到底是怎么回事？

What the heck is going on with this animation?

android

android-support-library

shared-element-transition