「不能引用內部類中的非最終變量」如何根據複選框的狀態來管理TextView？

Question

雖然我很清楚，我無法在我的onClick方法中引用非最終變量，但我有興趣瞭解如何解決我目前面臨的問題。

我有一個ArrayAdapter。如果用戶按下複選框AsyncTask並且用戶或者訂閱或退訂他自己的隊列，取決於複選框是否被選中。

我想這個狀態在我txtStatus的TextView的文本中的每個項目中得到反映。如何根據複選框的狀態設置TextView的文本？

這裏是我的getView方法的代碼的一部分：

@Override 
public View getView(int position, View convertView, ViewGroup parent) 
{ 
    View row = convertView; 

    final CheckBox queueCBox; 
    userControl = new UserController(context); 
    final String queueName = data[position].label; 
    if(row == null) 
    { 
     LayoutInflater inflater = ((Activity)context).getLayoutInflater(); 
     row = inflater.inflate(layoutResourceId, parent, false); 

     final QueueHolder holder = new QueueHolder(); 
     holder.queuecbox = (CheckBox)row.findViewById(R.id.queues_item_checkbox); 
     queueCBox = (CheckBox)row.findViewById(R.id.queues_item_checkbox); 
     holder.txtLabel = (TextView)row.findViewById(R.id.queues_item_label); 
     holder.txtStatus = (TextView)row.findViewById(R.id.queues_item_status); 

     holder.queuecbox.setOnClickListener(new OnClickListener() 
     { 
      @Override 
      public void onClick(View v) 
      { 
       final String[] param = new String[1]; 
       param[0] = queueName; 

       if(queueCBox.isChecked()) 
       { 
        holder.txtStatus.setText("Tilmeldt"); 
        Log.d("ClickTest","SWITCH ON"); 
        new JoinQueueTask().execute(param); 


       } 
       else 
       { 
        holder.txtStatus.setText("Frameldt"); 
        Log.d("ClickTest","SWITCH OFF"); 
        new LeaveQueueTask().execute(param); 
       } 
      } 
     }); 
     row.setTag(holder); 
    } 
    else 
    { 
     final QueueHolder holder = (QueueHolder)row.getTag(); 
    } 

    QueueItem queue = data[position]; 
    String name = queue.label.replace("-", " "); 
    holder.txtLabel.setText(name); // holder cannot be resolved 
    holder.queuecbox.setChecked(queue.value); // holder cannot be resolved 

    return row; 
} 

Answer 1

保持你持有它的方式。只是設置onClickListener，嘗試這樣做，

QueueHolder holder = null; 
if(row == null) 
{ 
    LayoutInflater inflater = ((Activity)context).getLayoutInflater(); 
    row = inflater.inflate(layoutResourceId, parent, false); 

    holder = new QueueHolder(); 
    holder.queuecbox = (CheckBox)row.findViewById(R.id.queues_item_checkbox); 
    queueCBox = (CheckBox)row.findViewById(R.id.queues_item_checkbox); 
    holder.txtLabel = (TextView)row.findViewById(R.id.queues_item_label); 
    holder.txtStatus = (TextView)row.findViewById(R.id.queues_item_status); 
    row.setTag(holder); 
} 
else 
{ 
    holder = (QueueHolder)row.getTag(); 
} 

QueueItem queue = data[position]; 
String name = queue.label.replace("-", " "); 
holder.txtLabel.setText(name); // holder cannot be resolved 
holder.queuecbox.setChecked(queue.value); // holder cannot be resolved 

final QueueHolder fianlHolder = holder; 

finalHolder.queuecbox.setOnClickListener(new OnClickListener() 
    { 
     @Override 
     public void onClick(View v) 
     { 
      final String[] param = new String[1]; 
      param[0] = queueName; 

      if(queueCBox.isChecked()) 
      { 
       finalHolder.txtStatus.setText("Tilmeldt"); 
       Log.d("ClickTest","SWITCH ON"); 
       new JoinQueueTask().execute(param); 


      } 
      else 
      { 
       finalHolder.txtStatus.setText("Frameldt"); 
       Log.d("ClickTest","SWITCH OFF"); 
       new LeaveQueueTask().execute(param); 
      } 
     } 
    }); 
return row; 
}