Question

在我的Android应用程序用户中，只选择listview中的一个项目，并更改该特定项目textview颜色。如果用户在列表视图中选择其他项目，则上一项目颜色设置为默认值我在用户选择时使用以下方法重置所有textview颜色，但当滚动随机文本颜色时，如果您有任何其他解决方案可以解决此问题，请使用

lv.setOnItemClickListener(new OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
                long arg3) {

但getchildcount方法仅返回当前显示项目textview :-(

                for(int i=0;i<lv.getChildCount();i++)
                {
                    Log.i("text",((TextView)((LinearLayout)lv.getChildAt(i)).findViewById(R.id.TruckNumber)).getText()+"");
            ((TextView)((LinearLayout)lv.getChildAt(i)).findViewById(R.id.TruckNumber)).setTextColor(Color.LTGRAY);
                }
                ((TextView)((LinearLayout)arg1).findViewById(R.id.TruckNumber)).setTextColor(Color.parseColor("#2a9bc8"));
                changeHeader(0);
                ((LinearLayout)lv.getChildAt(0)).refreshDrawableState();
        }   
    });

customAdapter

public class Search_Truck_Number_adapter扩展了BaseAdapter {

private static ArrayList<ListitemDetail> itemDetailarraylist;
private Context context=null;
        LayoutInflater inflater;
        ArrayList<TextView> TextViewObjects=new ArrayList<TextView>();
public Search_Truck_Number_adapter(ArrayList<ListitemDetail> result,Context c) {
    itemDetailarraylist=result;
    inflater = LayoutInflater.from(c);
    context=c;
}

@Override
public int getCount() {
    // TODO Auto-generated method stub
    return itemDetailarraylist.size();
}

@Override
public Object getItem(int arg0) {
    return itemDetailarraylist.get(arg0);
}

@Override
public long getItemId(int position) {
    // TODO Auto-generated method stub
    return position;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    ViewHolder holder;
    if(convertView==null)
    {
        convertView = inflater.inflate(R.layout.search_act_cell,null);
        holder = new ViewHolder();
        holder.txt_itemName = (TextView)convertView.findViewById(R.id.TruckNumber);
        holder.position=position;
        convertView.setTag(holder);
    }
    else
    {
        holder = (ViewHolder) convertView.getTag();
    }
    TextViewObjects.add(holder.txt_itemName);
    holder.txt_itemName.setText(itemDetailarraylist.get(position).getName());
    return convertView;
}

static class ViewHolder{
    TextView txt_itemName;
    Integer position;
}

}

Answer 1

public class Search_Truck_Number_adapter extends BaseAdapter implements OnClickListener
{
    private Integer no=null;

    private static ArrayList<ListitemDetail> itemDetailarraylist;
    private Context context=null;
            LayoutInflater inflater;
    public Search_Truck_Number_adapter(ArrayList<ListitemDetail> result,Context c) {
        itemDetailarraylist=result;
        inflater = LayoutInflater.from(c);
        context=c;
    }   
    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        return itemDetailarraylist.size();
    }

    @Override
    public Object getItem(int arg0) {
        return itemDetailarraylist.get(arg0);
    }

    @Override
    public long getItemId(int position) {
        // TODO Auto-generated method stub
        return position;
    }
    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder;
        if(convertView==null)
        {
            convertView = inflater.inflate(R.layout.search_act_cell,null);
            holder = new ViewHolder();
            holder.txt_itemName = (TextView)convertView.findViewById(R.id.TruckNumber);
            holder.position=position;
            convertView.setOnClickListener(this);
            convertView.setTag(holder);
        }
        else
        {
            holder = (ViewHolder) convertView.getTag();
        }
        holder.position=position;
        holder.txt_itemName.setText(itemDetailarraylist.get(position).getName());
        if(no!=null)
        {
        if(no!=position)
        {
            holder.txt_itemName.setTextColor(Color.LTGRAY);
        }
        else
        {
            holder.txt_itemName.setTextColor(Color.parseColor("#2a9bc8"));
        }
        }
        return convertView;
    }

     static class ViewHolder{
        TextView txt_itemName;
        Integer position;
        Integer Select_Position;
    }

    @Override
    public void onClick(View v) {
        SearchActivity sa=new SearchActivity();
        sa.changeHeader(0, context);
      ListView lv=(ListView) v.getParent();
      for(int i=0;i<lv.getChildCount();i++)
      {
         ((TextView)((LinearLayout)lv.getChildAt(i)).findViewById(R.id.TruckNumber)).setTextColor(Color.LTGRAY); 
      }
        no=((ViewHolder)v.getTag()).position;
        ((ViewHolder)v.getTag()).txt_itemName.setTextColor(Color.parseColor("#2a9bc8"));
        Log.i("Position", ((ViewHolder)v.getTag()).position+"");
    }
}

Answer 2

因为getChildAt（）仅适用于屏幕上显示的列表中的视图，所以可以先调用lv.getFirstVisiblePostion（）（这是一个类的android.widget.AdapterView方法，ListView间接扩展（参见ListView）在android开发人员指南并查看继承树）），然后如果你知道视图相对于它在屏幕上的位置的索引，你可以将索引添加到getFirstVisiblePosition（）的结果，例如getFirstVisiblePosition（）+ index 。这将为您提供与整个列表相关的视图位置，而不仅仅是屏幕上显示的内容。您可以使用它来更改文本颜色。 - 希望这有帮助

更改用户选择的列表视图的文本颜色其他文本视图颜色在android中设置为默认值

2 个答案: