Question

我正在尝试在列表视图内实现一个复选框。 listView是从JSON生成的。在适配器中，当我调用onCheckedChanged时，我想要获取该复选框的ID，然后将其返回给服务器。如果我想使用自己的构造函数将ID设置为复选框，该怎么办？

public class CheckListAdapter extends ArrayAdapter  implements CompoundButton.OnCheckedChangeListener{
List List =new ArrayList();
SparseBooleanArray mCheckStates;
boolean[] itemChecked;
    public CheckListAdapter(Context context, int resource) {
    super(context, resource);
        itemChecked = new boolean[10];
        mCheckStates = new SparseBooleanArray(10);
     }



public void add(@Nullable checkListItems object) {
    super.add(object);
    List.add(object);
}

@Override
public int getCount() {
    return List.size();
}

@Nullable
@Override
public Object getItem(int position) {
    return List.get(position);

}

public long getItemId(int position) {
    return 0;
}

@NonNull
@Override
public View getView(final int position, @Nullable View convertView, @NonNull ViewGroup parent) {
  View row;
  row = convertView;
 final checkListItemHolder h;
  if  ( row == null){
      LayoutInflater layoutInflater = (LayoutInflater)this.getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
      row = layoutInflater.inflate(R.layout.row_checklist,parent,false);
      h = new checkListItemHolder();
      h.tx_itemNo = (TextView) row.findViewById(R.id.checkListItemNO);
      h.tx_name= (TextView) row.findViewById(R.id.checkListItemName);
      h.checkBoxLab= (CheckBox) row.findViewById(R.id.checkBox);



      row.setTag(h);
  }
   else
   {
     h = (checkListItemHolder)row.getTag();
  }

     checkListItems L= (checkListItems)this.getItem(position);
     h.tx_name.setText(L.getItemName());
     Log.w("inja to adaptor","ta inja");
     h.tx_itemNo.setText(L.getItemNo());

 //    h.checkBoxLab.setChecked(false);
//     h.checkBoxLab.setChecked(checkedHolder[position]);
h.checkBoxLab.setOnCheckedChangeListener( new 
CompoundButton.OnCheckedChangeListener() {


        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
          //  checkedHolder[position] = isChecked;
           Log.w("yahoo","yahoo");

    }
});


     return row;

}

public boolean isChecked(int position) {
    return mCheckStates.get(position, false);
}

public void setChecked(int position, boolean isChecked) {
    mCheckStates.put(position, isChecked);

}

public void toggle(int position) {
    setChecked(position, !isChecked(position));

}
@Override
public void onCheckedChanged(CompoundButton buttonView,
                             boolean isChecked) {

    mCheckStates.put((Integer) buttonView.getTag(), isChecked);

}

public boolean[] checkedHolder;

private void createCheckedHolder() {
    checkedHolder = new boolean[getCount()];
}


static class checkListItemHolder{

        TextView tx_name, tx_itemNo;
        CheckBox checkBoxLab;

}

Answer 1

将此行h.checkBoxLab.setTag(position)添加到此行h.checkBoxLab= (CheckBox) row.findViewById(R.id.checkBox);下使用它从列表视图中删除行：

@Override
public void onCheckedChanged(CompoundButton buttonView,
                             boolean isChecked) {
    Integer index = (Integer) buttonView.getTag();
                    List.remove(index.intValue());  
                    notifyDataSetChanged();

}

，请解释您到底要返回服务器什么？

Answer 2

您只需在onCheckedChanged方法内使用buttonView.getId()即可获取复选框的ID。此视图始终引用Doc所述的复选框，其检查状态已更改。

选中后如何获取适配器内复选框的ID？

2 个答案: