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在我的項目中,我使用RecyclerView
來顯示帶有縮略圖的項目列表。當用戶點擊一個項目時,DetailView被打開,圖像顯示在頂部。我試圖分享這些片段之間的一些元素,但轉換僅在輸入詳細片段時起作用,而不是在從中返回時起作用。Android共享元素片段轉換:返回轉換不起作用
在我ListAdapter
我設置TransitionName
,當用戶點擊一個項目通知ListFragment:
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
viewHolder.image.setTag(Constants.SHARED_NAME_IMAGE + item.itemId);
}
單擊事件:
@OnClick(R.id.root)
public void onClickedItem() {
List<Pair<View, String>> sharedElements = new ArrayList<>();
sharedElements.add(new Pair<View, String>(image, (String) image.getTag()));
interactionListener.onItemSelected(data.get(getAdapterPosition() - headerItemCount).type, data.get(getAdapterPosition() - headerItemCount).itemId, sharedElements);
}
然後在ListFragment我開始了DetailFragment:
public void navigateToFragment(Fragment curFragment, Fragment nextFragment,
boolean addToBackStack, List<Pair<View, String>> sharedElements) {
if (nextFragment == null) {
return;
}
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP && sharedElements != null && curFragment != null) {
// Setup transition on first fragment
curFragment.setSharedElementEnterTransition(TransitionUtil.getReturnTransition(this));
curFragment.setSharedElementReturnTransition(TransitionUtil.getEnterTransition(this));
curFragment.setEnterTransition(null);
curFragment.setExitTransition(null);
// Setup transition on second fragment
nextFragment.setSharedElementEnterTransition(TransitionUtil.getEnterTransition(this));
nextFragment.setSharedElementReturnTransition(TransitionUtil.getReturnTransition(this));
nextFragment.setEnterTransition(null);
nextFragment.setExitTransition(null);
// Add second fragment by replacing first
FragmentTransaction ft = getSupportFragmentManager()
.beginTransaction()
.replace(R.id.container, nextFragment);
if (addToBackStack) {
ft.addToBackStack("fragment");
}
for (Pair<View, String> sharedElement : sharedElements) {
ViewCompat.setTransitionName(sharedElement.first, sharedElement.second);
ft.addSharedElement(sharedElement.first, sharedElement.second);
}
// Apply the transaction
ft.commit();
} else {
FragmentTransaction ft = getSupportFragmentManager()
.beginTransaction()
.replace(R.id.container, nextFragment);
if (addToBackStack) {
ft.addToBackStack("fragment");
}
ft.commit();
}
}
Finally我設置了當前過渡名稱在DetailFragment的onCreateView()
(因爲它取決於條目標識):
ViewCompat.setTransitionName(header, Constants.SHARED_NAME_IMAGE + itemId);