Android CursorLoader 带有选择和selectionArgs[]

我在用Loader for RecyclerView.Adapter列出项目。我想列出数据库表中的特定项目。所以我做了：

public Loader<Cursor> onCreateLoader(int id, Bundle args) {
    String selectionArgs1[]={"1","13","14"}; 
    String selection1 = DatabaseOpenHelper.COLUMN_ID + " in (";
    for (int i = 0; i < selectionArgs1.length; i++) {
                selection1 += "?, ";
    }
    selection1 = selection1.substring(0, selection1.length() - 2) + ")";
    String[] projection1 =...
    return new CursorLoader(getActivity(),StudentContentProvider.CONTENT_URI1, projection1, selection1,selectionArgs1, null);
}

通常我给null,null to selection and selectionArgs但在这里，我列出了具体的项目IDs。当新项目添加到表中并且我想列出它时，就会出现问题。这cursor我返回时不知道有新项目，因为我提供了 3 个特定项目，因此它只会检测这 3 个项目何时有变化。

当有新项目添加时如何列出ID我也想列出它？我应该将数据库中的所有项目投影到RecyclerView.Adapter和过滤器IDs in onBindViewHolder()?

既然我已经限制了IDs in cursor，如果仅特定项目发生变化，则它会发生变化，而不是在添加新项目时发生变化。我做了一个把戏onLoadFinished()创造新的cursor并交换新的光标。因此，当发生变化时，我会用我的光标获得新的光标selection and selectionArgs again:

public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
   switch (loader.getId()) {
       case LOADER_ID:{
          String selectionArgs1[]={...}; 
          String selection1 = DatabaseOpenHelper.COLUMN_ID + " in (";
          for (int i = 0; i < selectionArgs1.length; i++) {
                selection1 += "?, ";
          }
          selection1 = selection1.substring(0, selection1.length() - 2) + ")";
          String[] projection1 =...              
          mDataset1 = getActivity().getContentResolver().query(StudentContentProvider.CONTENT_URI1, projection1, selection1, selectionArgs1, null);
          mAdapter.swapCursor(mDataset1);
          break;
      }
}