我遇到一个奇怪的问题，我有一个Listview，每行包含checkbox。当checkbox为checked或unchecked时，我正在更新edittext之外listview的值，形成来自textview的相应数值。但我面临的问题是，当我滚动listview我已检查的checkboxes成为unchecked时，edittext之外的listview值也会相应更新我的自定义adapter如下所示：
public class ListAdapter extends BaseAdapter {
Context ctx;
LayoutInflater lInflater;
ArrayList<LItem> lstItems;
TextView tvAQuantity , tvBQuantity;
EditText etQuantity ;
LItem p;
ViewHolder holder;
ListAdapter(Context context, ArrayList<LItem> objects) {
ctx = context;
lstItems = objects;
// lInflater = (LayoutInflater) ctx .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public int getCount() {
return lstItems.size();
}
@Override
public Object getItem(int position) {
return lstItems.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
View view = convertView;
if (view == null) {
lInflater = (LayoutInflater) ctx .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = lInflater.inflate(R.layout.list_style_task
, parent, false);
holder = new ViewHolder();
holder.tvAQuan = (TextView) view.findViewById(R.id.tvAQuantity);
holder.tvBQuan=(TextView)view.findViewById(R.id.tvBQuantity);
holder.etQuan=(EditText)view.findViewById(R.id.etTaskQuantity);
holder.tvMatN= (TextView) view.findViewById(R.id.tvMaterial ) ;
holder.tvTksN= (TextView) view.findViewById(R.id.tvTask ) ;
holder.chkSelect=(CheckBox)view.findViewById(R.id.chkSelected);
holder.btnRefreshQuantity=(Button)view.findViewById(R.id.btnRefreshQuantity);
//SelectQuantity=(EditText)findViewById(R.id.etSQuantity);
view.setTag(holder);
// tvAQuantity.setText(p.getAQ());
// etQuantity.setTag(position);
}
else {
holder=(ViewHolder)view.getTag();
}
p = getProduct(position);
if(p!=null) {
if (holder.tvAQuan != null) {
holder.tvAQuan.setText(p.getAQ());
holder.tvBQuan.setText(p.getBQ());
holder.tvMatN.setText(p.getMName());
holder.tvTksN.setText(p.getTName());
holder.chkSelect.setChecked(p.getSelected());
}
}
final int posi=position;
holder.btnRefreshQuantity.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
RelativeLayout rl = (RelativeLayout)v.getParent();
holder.tvAQuan = (TextView) rl .findViewById(R.id.tvAQuantity);
holder.tvBQuan = (TextView) rl .findViewById(R.id.tvBQuantity);
holder.etQuan=(EditText)rl.findViewById(R.id.etTaskQuantity);
if(Float.parseFloat (holder.etQuan.getText().toString())<=Float.parseFloat (holder.tvBQuan.getText().toString()))
{
p = getProduct(posi);
p.setAQ(holder.etQuan.getText().toString());
String s = holder.etQuan.getText().toString();
notifyDataSetChanged();
}
else
{
Toast.makeText(myactivity,"Quantity should be less than balance quantity!",Toast.LENGTH_SHORT).show();
}
}
});
holder.chkSelect.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if(isChecked)
{
p = getProduct(position);
p.setSelected(true);
float total=Float.parseFloat (etSelectedQuantity.getText().toString())+Float.parseFloat(p.getAQ().toString());
etSelectedQuantity.setText(Float.toString(total));
}
else
{
p = getProduct(position);
p.setSelected(false);
float total=Float.parseFloat (etSelectedQuantity.getText().toString())-Float.parseFloat(p.getAQ().toString());
etSelectedQuantity.setText(Float.toString(total));
}
}
});
// CheckBox cbBuy = (CheckBox) view.findViewById(R.id.checkbox);
//cbBuy.setOnCheckedChangeListener(myCheckChangList);
// cbBuy.setTag(position);
// cbBuy.setChecked(p.selected);
return view;
}
LItem getProduct(int position)
{
return ((LItem) getItem(position));
}
ArrayList<LItem> getBox() {
ArrayList<LItem> box = new ArrayList<LItem>();
for (LItem p : lstItems) {
// if (p.selected)
// box.add(p);
}
return box;
}
private class ViewHolder{
public TextView tvAQuan;
public TextView tvBQuan;
public EditText etQuan;
public TextView tvMatN;
public TextView tvTksN;
public CheckBox chkSelect;
public Button btnRefreshQuantity;
}
}
答案 0 :(得分：0)
试试这个，
if (view == null) {
......
}
else {
.......
}
holder.chkSelect.setOnCheckedChangeListener(null);// you need to set listener to null.
p = getProduct(position);
if(p!=null) {
if (holder.tvAQuan != null) {
holder.tvAQuan.setText(p.getAQ());
holder.tvBQuan.setText(p.getBQ());
holder.tvMatN.setText(p.getMName());
holder.tvTksN.setText(p.getTName());
holder.chkSelect.setChecked(p.getSelected());
}
}
// place remaining code...