使用SelectionTracker在RecycleView中删除项目

Question

我有一个RecyclerView，我正在实现一个SelectionTracker。在我的RecyclerView的每个项目中，我都有一个imageview，其中有一个OnClickListener要删除。选择SelectionTracker项的状态时，不会触发要删除的OnClickListener

1. 我的SelectionTracker生成器：

   SelectionTracker<Long> selectionTracker = new SelectionTracker.Builder(
       "macro-item-selection-tracker",
       mRecyclerView,
       new MacroItemRecyclerViewAdapter.PositionKeyProvider(mMacroItemsAdapter),
       new MacroItemDetailsLookup(mRecyclerView),
       StorageStrategy.createLongStorage())
       .withSelectionPredicate(SelectionPredicates.createSelectSingleAnything())
       .build();
   

2. 删除单击侦听器：

   public class DeleteMacroItemClickListener implements View.OnClickListener {
         @Override
         public void onClick(View view) {
             MacroItemViewHolderAction actions = getViewHolderActionSafety(view);
             actions.handleClickDeleteMacroItem(mMacroItem);
         }
   }
   

3. inSelectionHotspot for identify单击区域图像删除：

   @Override
   public boolean inSelectionHotspot(@NonNull MotionEvent e) {
        Rect rect = new Rect();
        mDeleteMacroItem.getDrawingRect(rect);
        int[] locationOnScreen = new int[2];
        mDeleteMacroItem.getLocationOnScreen(locationOnScreen);
        if (((e.getRawX() > locationOnScreen[0] && (e.getRawX() < locationOnScreen[0] + mDeleteMacroItem.getWidth())))
                           && (e.getRawY() > locationOnScreen[1] && (e.getRawY() < locationOnScreen[1] + mDeleteMacroItem.getHeight()))) {
               return false;
         } else {
               return true;
         }
   //     return !rect.contains((int) e.getX(), (int) e.getY());
   }
   

Answer 1

在选择跟踪器中添加一个观察者

像这样：

selectionTracker?.addObserver(object : SelectionTracker.SelectionObserver<Long>(){
    override fun onSelectionChanged() {
        super.onSelectionChanged()
        //onClick for that ImageView
    }
})