Question

我在Gridview中有几个TextViews，ImageViews和复选框。我的复选框正常工作，我可以检查和取消选中，但问题是这是多选。如果我选中第一个复选框并向下滚动，我会看到第4个，第7个，第10个项目复选框也会被检查。我已经阅读了很多，我相信这是因为循环视图。我不知道如何解决这个问题。我只想点击第1和第6个复选框，只检查这两个框。下面是我的BaseAdapter代码。我是android的新手，请帮帮我。

public class test extends BaseAdapter {
public int itemSelected = 0;


private Activity activity;
private ArrayList<HashMap<String, String>> data;
private static LayoutInflater inflater=null;
SparseBooleanArray checked;
HashMap<String, String> compareSelectionList1 = new HashMap<String, String>();

public test(Activity a, ArrayList<HashMap<String, String>> d) {

activity = a;
data=d;
inflater = (LayoutInflater)activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}

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

@Override
public Object getItem(int position) {
//return position;
return data.get(position);    
}

@Override
public long getItemId(int position) {
return position;
//return data.get(position); 
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
final ViewHolder holder;
        if (convertView == null) {
        LayoutInflater inflater1 = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
              convertView = inflater1.inflate(R.layout.comparison_selection_list_row_del, parent, false);

              holder = new ViewHolder();             
              holder.txtBrandName = (TextView) convertView.findViewById(R.id.txtBrandsn);
              holder.prodImg = (ImageView) convertView.findViewById(R.id.btnSmallImage);
              holder.recFlagImg = (ImageView) convertView.findViewById(R.id.btnRecFlag);

              holder.txtPartNumber = (TextView) convertView.findViewById(R.id.txtpartnumber);
              holder.txtNotes = (TextView) convertView.findViewById(R.id.txtnotes);

              holder.chkBox = (CheckBox) convertView.findViewById(R.id.chkBox);
                             holder.chkBox.setId(position);

              convertView.setTag(holder);

        } else {
              holder = (ViewHolder) convertView.getTag();
        }


compareSelectionList1 = data.get(position);
holder.chkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {   
   @Override
   public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
       if(isChecked) {
        holder.chkBox.setBackgroundResource(R.drawable.compselection_checked_btn);           
       } else {
        holder.chkBox.setBackgroundResource(R.drawable.compselection_btn);           
       }
   }
});

holder.txtBrandName.setText(compareSelectionList1.get("brands"));


holder.txtPartNumber.setText(compareSelectionList1.get("partnumbers"));
holder.txtNotes.setText(compareSelectionList1.get("footnotes"));
holder.txtNotes.setClickable(true);
holder.txtPartNumber.setClickable(true);
holder.id = position;

return convertView;   
}

}

");

Answer 1

您还必须从holder设置复选框的选中状态。否则，已检查状态将是循环视图的状态。

我必须说，你实现了所有这一切，但是按照你已有的编码，这样的事情应该有效：

在你的活动中，定义一个成员变量来记住当前检查的项目（注意，如果活动被销毁/重新创建但是这里的范围超出范围，你必须保存/恢复该变量的值）：

Set<Long> mCheckedItemPositions = new HashSet<Long>();

像这样扩展您的OnCheckedChangeListener，以跟踪检查的位置：

public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
   if(isChecked) {
    holder.chkBox.setBackgroundResource(R.drawable.compselection_checked_btn);
    // you use the ID field to hold the position
    mCheckedItemPositions.add(buttonView.getId());             
   } else {
    holder.chkBox.setBackgroundResource(R.drawable.compselection_btn);           
    mCheckedItemPositions.remove(buttonView.getId()); 
   }

}

最后在getView语句的末尾，在return语句之前添加此项，以便根据mCheckedPositions呈现正确状态的复选框：

if (mCheckedPositions.contains(holder.chkBox.getId()) {
    holder.chkBox.setBackgroundResource(R.drawable.compselection_checked_btn);
} else {
    holder.chkBox.setBackgroundResource(R.drawable.compselection_btn);           
}

Gridview中的Android CheckBox回收视图问题

1 个答案: