向下滚动时随机选择自定义列表视图复选框

Question

嗨，我是Android的新手，并使用复选框进行自定义列表视图，因为我在滚动时面临随机选择的另一个列表项复选框。 我已经完成了一些线程，但没有解决我的问题。 请帮我解决这个问题。 这是我的自定义适配器

CustomAdapter.java

public class CustomAdapter extends BaseAdapter{

private boolean[] checkBoxState;
private final Activity context;
public final ArrayList<SelectedListModel>list;
private SelectedListModel element;
    private ArrayList<SelectedListModel> positions = new ArrayList<SelectedListModel>();

public CustomAdapter(Activity applicationContext,
        ArrayList<SelectedListModel> contacts) {
    // TODO Auto-generated constructor stub
    this.context = applicationContext;
    this.list = contacts;
    this.checkBoxState=new boolean[contacts.size()];
}

static class ViewHolder {
    protected TextView name,number;
    protected CheckBox checkbox;
  }


public int getCount() {
    // TODO Auto-generated method stub
    System.out.println("list size:"+list.size()); 
    return list.size();
}

public ArrayList<SelectedListModel> getSelectedItemList() {
    // TODO Auto-generated method stub
    return positions;
}

public long getItemId(int arg0) {
    // TODO Auto-generated method stub
    return 0;
}

public View getView(final int position, View convertView, ViewGroup parent) {
    // TODO Auto-generated method stub
    final ViewHolder viewHolder;
    if (convertView == null) {
      LayoutInflater inflator = context.getLayoutInflater();
      convertView = inflator.inflate(R.layout.row_listview, null);
      viewHolder = new ViewHolder();
      viewHolder.name = (TextView) convertView.findViewById(R.id.textView1);
      viewHolder.number = (TextView) convertView.findViewById(R.id.textView2);
      viewHolder.checkbox = (CheckBox) convertView.findViewById(R.id.checkBox1);
      viewHolder.checkbox.setOnCheckedChangeListener(new OnCheckedChangeListener() {

        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            // TODO Auto-generated method stub
            element = (SelectedListModel)viewHolder.checkbox.getTag();
            if(buttonView.isChecked()==true){
                checkBoxState[position] = buttonView.isChecked();
                element.setSelected(checkBoxState[position]);
                positions.add(element);


            }else{
                checkBoxState[position] = buttonView.isChecked();
                element.setSelected(checkBoxState[position]);

                positions.remove(element);
            }

        }
    });


      viewHolder.checkbox.setTag(list.get(position));
      convertView.setTag(viewHolder);
    } else {

        viewHolder = (ViewHolder) convertView.getTag();
        viewHolder.checkbox.setTag(list.get(position));
    }
    ViewHolder holder = (ViewHolder) convertView.getTag();
    setNameAndNumber(list.get(position),holder,position);
    return convertView;
  }

private void setNameAndNumber(SelectedListModel selectedListModel,ViewHolder holder, int position) 
{
    // TODO Auto-generated method stub
    holder.name.setText(selectedListModel.getName());
    holder.number.setText(selectedListModel.getNumber());
    holder.checkbox.setSelected(selectedListModel.isSelected());


}

}

Answer 1

您正在设置“已选择”状态但不是“已检查”状态：

holder.checkbox.setSelected(selectedListModel.isSelected());
holder.checkbox.setChecked(selectedListModel.isSelected());

Answer 2

mViewHolder.checkBox = (CheckBox)convertView.findViewById(R.id.checkBox1);
            mViewHolder.checkBox.setOnClickListener(new OnClickListener() {
                public void onClick(View v) {
                    CheckBox cb = (CheckBox) v.findViewById(R.id.checkBox1);
                    if (cb.isChecked()) {
                        checkBoxArrayList.set(position, true);
                    } else if (!cb.isChecked()) {
                        checkBoxArrayList.set(position, false);
                    }
                }
            });

您好以下链接可能对您有所帮助http://mylearnandroid.blogspot.in/2014/06/listview-problem-while-scrolling.html