1

我有一个活动,其中有一个RecyclerView(SuperSlim库)和一个详细活动,当我单击该列表中的一个项目时,详细活动将会打开。问题是,当我回去,我试图设置点击的元素在列表中的第一个可见元素,但我得到这个可怕的动画:SharedElements在RecyclerView中产生不良影响

enter image description here

这是我onActivityReenter()

@Override 
public void onActivityReenter(int resultCode, Intent data) { 
    super.onActivityReenter(resultCode, data); 
    Log.d(TAG, "onActivityReenter() called with: resultCode = [" + resultCode + "], data = [" + data + "]"); 

    mTmpReenterState = new Bundle(data.getExtras()); 
    int startingPosition = mTmpReenterState.getInt(EXTRA_STARTING_ITEM_POSITION); 
    int currentPosition = mTmpReenterState.getInt(EXTRA_CURRENT_ITEM_POSITION); 

    mRecycler.scrollToPosition(currentPosition); 
    postponeEnterTransition(); 
    mRecycler.getViewTreeObserver().addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() { 
     @Override 
     public boolean onPreDraw() { 
      mRecycler.getViewTreeObserver().removeOnPreDrawListener(this); 
      // TODO: figure out why it is necessary to request layout here in order to get a smooth transition. 
      mRecycler.requestLayout(); 
      startPostponedEnterTransition(); 

      return true; 
     } 
    }); 
} 

而且我SharedElementCallback:

private final SharedElementCallback exitTransitionCallBack = new SharedElementCallback() { 
    @Override 
    public void onMapSharedElements(List<String> names, Map<String, View> sharedElements) { 

     if (mTmpReenterState == null) { 
      // If mTmpReenterState is null, then the activity is exiting. 
      View navigationBar = findViewById(android.R.id.navigationBarBackground); 
      View statusBar = findViewById(android.R.id.statusBarBackground); 
      if (navigationBar != null) { 
       names.add(navigationBar.getTransitionName()); 
       sharedElements.put(navigationBar.getTransitionName(), navigationBar); 
      } 
      if (statusBar != null) { 
       names.add(statusBar.getTransitionName()); 
       sharedElements.put(statusBar.getTransitionName(), statusBar); 
      } 
     } else { 
      int startingPosition = mTmpReenterState.getInt(EXTRA_STARTING_ITEM_POSITION); 
      int currentPosition = mTmpReenterState.getInt(EXTRA_CURRENT_ITEM_POSITION); 
      if (startingPosition != currentPosition) { 
       // If startingPosition != currentPosition the user must have swiped to a 
       // different page in the DetailsActivity. We must update the shared element 
       // so that the correct one falls into place. 
       sharedElements.clear(); 
       sharedElements.put("number", mLayoutManager.findViewByPosition(currentPosition).findViewById(R.id.text_number)); 
       sharedElements.put("day", mLayoutManager.findViewByPosition(currentPosition).findViewById(R.id.text_day)); 
       sharedElements.put("recycler", mLayoutManager.findViewByPosition(currentPosition + 1).findViewById(R.id.recycler)); 
      } 

      mTmpReenterState = null; 
     } 
    } 
}; 

我认为这个问题是该活动试图使从原来的项目动画位置顶部的名单,但我不知道如何避免这一点。

enter image description here

有谁知道如何解决这一问题?

提前致谢!

回答

1

过了一段时间,我意识到我更新主要活动列表的问题是notifyItemChanged(int)LocalBroadcast和标准的recyclerView动画造成的故障。我解决使用问题:

RecyclerView.setItemAnimator(null) 

因为标准没有工作

((SimpleItemAnimator) RecyclerView.getItemAnimator()) 
          .setSupportsChangeAnimations(false) 

所以,问题是无关SharedElements

相关问题