DBカーソル付きのカスタムアダプタのクエリ

Question

次のカスタムアダプタを使用して、DBカーソルからMyリストコントロールを作成しています。 スーパーが呼び出されたときに、特にこのコードがコンストラクターでクラッシュする理由を理解できません。

public class ListAdaptor extends SimpleCursorAdapter { 

    private Cursor dataCursor; 
    private LayoutInflater mInflater; 

    class ViewHolder { 

     public TextView label = null; 
     public CheckBox chkBx = null; 
     public TextView price = null; 
     public TextView weight = null; 
    } 


    //constructor 
    public ListAdaptor(Context context, int layout, Cursor dataCursor, String[] from, int[] to) { 

     super(context, layout, dataCursor, from, to); 
     this.dataCursor = dataCursor; 
     mInflater = LayoutInflater.from(context); 
    } 

    public View getView(int position, View convertView, ViewGroup parent) { 

     // A ViewHolder keeps references to children views to avoid unneccessary calls 
     // to findViewById() on each row. 
     ViewHolder holder; 

     // When convertView is not null, we can reuse it directly, there is no need 
     // to reinflate it. We only inflate a new View when the convertView supplied 
     // by ListView is null. 

     if (convertView == null) { 

      // Inflate the view 
      convertView = mInflater.inflate(R.layout.listviewlyt, null); 

      // Get the ID's of the views 
      TextView tmpLbl  = (TextView)convertView.findViewById(R.id.label); 
      CheckBox tmpChkBx = (CheckBox)convertView.findViewById(R.id.chkbox); 
      TextView tmpPrc  = (TextView)convertView.findViewById(R.id.labelPrice); 
      TextView tmpWt  = (TextView)convertView.findViewById(R.id.labelWt); 


      // Creates a ViewHolder and store references to the two children views 
      // we want to bind data to. 
      holder = new ViewHolder(); 

      holder.label = tmpLbl; 
      holder.chkBx = tmpChkBx; 
      holder.price = tmpPrc; 
      holder.weight = tmpWt; 

      // Set the Tag 
      convertView.setTag(holder); 

     } 
     else { 
      // Get the ViewHolder back to get fast access to the TextView 
      // and the ImageView. 
      holder = (ViewHolder) convertView.getTag(); 
     } 

     // Bind the data efficiently with the holder. 
     // Cursor to current item 

     dataCursor.moveToPosition(position); 
     String keyWrd = dataCursor.getString(2); 
     String price = dataCursor.getString(3); 

     TextView labelRef = holder.label; 
     CheckBox chbxRef = holder.chkBx; 
     TextView labelPrc = holder.price; 
     TextView labelWt = holder.weight; 

     labelRef.setText(keyWrd); 
     labelPrc.setText(price); 
     //chbxRef.setChecked(refObj.flag); 
     //labelWt.setText(refObj.wt); 

     return convertView; 
    } 
} 

誰かが理由を見つけるのを手助けできますか？

Answer 1

おそらくこの行は、問題

mInflater = LayoutInflater.from(context);