指定された子は、すでに私のアダプタの親、RecyclerView

Question

があります

java.lang.IllegalStateException：

public class OutInListFragment extends Fragment { 
    private RecyclerView mRecyclerView; 
    private LinearLayoutManager mLayoutManager; 
    private ListAdapter mAdapter; 
    private List<String> list = new ArrayList<String>(); 

    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
          Bundle savedInstanceState) { 
     // Inflate the layout for this fragment 
     View view= inflater.inflate(R.layout.fragment_in_out_list, container, false); 
     mRecyclerView = (RecyclerView) view.findViewById(R.id.list_in_out); 
     if(mRecyclerView!=null){ 
      Bundle bundle=getArguments(); 
      Cursor listCursor = getList(bundle.getInt("day"),bundle.getInt("month"),bundle.getInt("year")); 
      // use this setting to improve performance if you know that changes 
      // in content do not change the layout size of the RecyclerView 
      mRecyclerView.setHasFixedSize(true); 

      // use a linear layout manager 
      mLayoutManager = new LinearLayoutManager(getContext()); 
      mRecyclerView.setLayoutManager(mLayoutManager); 

      if(listCursor.getCount()>0) { 
       listCursor.moveToFirst(); 
       int i = 0, index; 
       while (!listCursor.isAfterLast()) { 
        index = listCursor.getColumnIndex("amount"); 
        list.add(listCursor.getString(index)); 
        listCursor.moveToNext(); 
        i++; 
       } 
       listCursor.close(); 
      }else{ 
       list.add("0"); 
      } 
      // specify an adapter (see also next example) 
      mAdapter = new ListAdapter(list); 
      mRecyclerView.setAdapter(mAdapter); 
     }else{ 
      Toast.makeText(getContext(),"Error", Toast.LENGTH_SHORT).show(); 
     } 
     return view; 
    } 
} 

が、私はこのエラーを取得する：フラグメントのです

public class ListAdapter extends RecyclerView.Adapter<ListAdapter .ViewHolder> { 
    private List<String> mDataset; 

    // Provide a reference to the views for each data item 
    // Complex data items may need more than one view per item, and 
    // you provide access to all the views for a data item in a view holder 
    public static class ViewHolder extends RecyclerView.ViewHolder { 
     // each data item is just a string in this case 
     public TextView mTextView; 
     public ViewHolder(TextView v) { 
      super(v); 
      mTextView = v; 
     } 
    } 

    // Provide a suitable constructor (depends on the kind of dataset) 
    public ListAdapter (List<String> myDataset) { 
     mDataset = myDataset; 
    } 

    // Create new views (invoked by the layout manager) 
    @Override 
    public ListAdapter .ViewHolder onCreateViewHolder(ViewGroup parent, 
                int viewType) { 
     // create a new view 
     View v = LayoutInflater.from(parent.getContext()) 
       .inflate(R.layout.item_list_out_in, parent, false); 

     TextView itemList = (TextView) v.findViewById(R.id.item_list); 
     ViewHolder vh = new ViewHolder(itemList); 
     return vh; 
    } 

    // Replace the contents of a view (invoked by the layout manager) 
    @Override 
    public void onBindViewHolder(ViewHolder holder, int position) { 
     // - get element from your dataset at this position 
     // - replace the contents of the view with that element 
     holder.mTextView.setText(mDataset.get(position)); 
    } 

    // Return the size of your dataset (invoked by the layout manager) 
    @Override 
    public int getItemCount() { 
     return mDataset.size(); 
    } 
} 

指定された子にはすでに親があります。子の親で最初にremoveView（）を呼び出す必要があります。

私はアンドロイドが新しく、この問題を解決できません...助けてください。

Answer 1

ViewHolder vh = new ViewHolder(itemList);の代わりに、itemListにはすでに親があるので、ViewHolder vh = new ViewHolder(v);を使用する必要があります。

Answer 2

だけ

onCreateViewHolder(ViewGroup parent, int viewType)で

ViewHolder vh = new ViewHolder(v); 

で

ViewHolder vh = new ViewHolder(itemList); 

を交換してください。

itemListはvの子であるためです。