Java 获取列表视图的位置项时出错 listContent.setOnItemClickListener（新的AdapterView.OnItemClickListener（） { @凌驾 public void onItemClick（AdapterView父对象、视图、整型位置、长id）{ 对于（int i=0；i

您的问题确实是关于，但很难确定为什么会发生这种情况。问题可以在这里找到：

listContent.setOnItemClickListener(new AdapterView.OnItemClickListener()
    {

        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

            for(int i=0;i<showLists.size();i++){
              //
                TextView v=(TextView)listContent.getChildAt(i).findViewById(R.id.txtDes);
                v.setTextColor(Color.BLACK);

            }

            TextView v=(TextView)listContent.getChildAt(position).findViewById(R.id.txtDes);
            v.setTextColor(Color.RED);
            Toast.makeText(context,"POS "+showLists.get(position).getDes(),Toast.LENGTH_SHORT).show();

        }
    });

listContent.setOnItemClickListener（新的AdapterView.OnItemClickListener（）{
@凌驾
public void onItemClick（AdapterView父对象、视图、整型位置、长id）{
对于（int i=0；i

//下面是创建customListMoiNhat对象 最终customListMoiNhat customListMoiNhat=新customListMoiNhat（上下文，R.layout.moinhat\u customlistview，ShowList，currentpos）； customListMoiNhat.notifyDataSetChanged（）； setAdapter（customListMoiNhat）

listContent.setOnItemClickListener（新的AdapterView.OnItemClickListener（）
{
@凌驾
public void onItemClick（AdapterView父对象、视图、整型位置、长id）{
当前位置=位置；
customListMoiNhat.notifyDataSetChanged（）；
}
});

此项的可能重复项仍将崩溃。谢谢，我知道列表视图具有recyling机制。当我单击列表视图上的某个项目时（30个项目）示例项的索引为0，嗯，甚至在该标记下有两个项也是红色的。您能修复它吗？对不起，我这么晚才读到这条评论。谢谢，我现在就试试。没问题。如果需要帮助，请告诉我。我试过这段代码，但所有项listview都设置为红色或我的代码都是错误的。@@我刚刚发布了新的cmt，请再次检查：D

for(int i=0;i<showLists.size();i++){ <-- this line actually causes the crash
//
    the crash is in the next line, at the findViewById
    TextView v=(TextView)listContent.getChildAt(i).findViewById(R.id.txtDes); 
    v.setTextColor(Color.BLACK);
}

int currentPosition = -1;

// Just a basic adapter. The getView method is the key here
final ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1) {
        @NonNull
        @Override
        public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
            View view = super.getView(position, convertView, parent);
            if (position == currentPosition) {
                ((TextView) view).setTextColor(Color.RED);
            } else {
                ((TextView) view).setTextColor(Color.BLACK);
            }
            return  view;
        }
    };

// and here is the onItemClick
listView.setOnItemClickListener(new AdapterView.OnItemClickListener()
    {

        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            currentPosition = position;
            adapter.notifyDataSetChanged();
        }
    });

listContent.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            for (int i = 0; i < showLists.size(); i++) {

                TextView v = (TextView) view.findViewById(R.id.txtDes);
                v.setTextColor(Color.BLACK);

            }

            TextView v = (TextView) view.findViewById(R.id.txtDes);
            v.setTextColor(Color.RED);
            Toast.makeText(context, "POS " + showLists.get(position).getDes(), Toast.LENGTH_SHORT).show();

        }
    });

public View getView(int position, View convertView, ViewGroup parent)
{
    LayoutInflater inflater= (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View viewRow=convertView;
    if(viewRow==null){
        viewRow=inflater.inflate(layout,parent,false);
        viewHolder viewHolder=new viewHolder();
        viewHolder.imgIcon    = (ImageView) viewRow.findViewById(R.id.imgIcon);
        viewHolder.txtDes     = (TextView) viewRow.findViewById(R.id.txtDes);

        viewRow.setTag(viewHolder);
    }

    viewHolder  holder= (viewHolder) viewRow.getTag();
    holder.imgIcon.setImageResource(listMoiNhat.get(position).getIcon());
    holder.txtDes.setText(listMoiNhat.get(position).getDes());
    if(position==currentpos){
        holder.txtDes.setTextColor(Color.RED);
    }
    else {
        holder.txtDes.setTextColor(Color.RED);

    }
    return viewRow;
}

    listContent.setOnItemClickListener(new AdapterView.OnItemClickListener()
    {

        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {



            currentpos=position;
            customListMoiNhat.notifyDataSetChanged();


        }
    });