Question

我的小应用程序出了问题。有两个ListViews，其中包含另外3个ArrayLists 它们通过从服务接收广播来每秒更新。数据集中有很多数字。我可以更改数据集的来源。有时我的ListViews（甚至整个活动，因为我有自定义视图，它绘制了我的图表）闪烁，将一个数据集更改为另一个数据集时出现问题。

更新从广播接收器调用的UI方法

private void updateUI(Intent intent)
{

    ArrayList<String> names = new ArrayList<String>();
    ArrayList<String> values = new ArrayList<String>();

    Bundle i = intent.getExtras();
    if (i==null)
    {
        System.out.print("");
    }
    else
    {
        if(i.get("chartJSON") !=null)
        {
            LinearLayout mChartLinearLayout;
            mChartLinearLayout = (LinearLayout)findViewById(R.id.header_chart);
            chartView.invalidate();

            mChartLinearLayout.removeView(chartView);
            chartView.setChartJSON((String) i.get("chartJSON"));
            mChartLinearLayout.addView(chartView);

            chart = true;
        }
        asksAmount.clear();
        asksPrice.clear();
        asksSumm.clear();
        bidsAmount.clear();
        bidsPrice.clear();
        bidsSumm.clear();
        if (i.get("asksAmount") != null)
        {
            asksAmount.addAll((ArrayList<String>) i.get("asksAmount"));
            asksPrice.addAll((ArrayList<String>) i.get("asksPrice"));
            asksSumm.addAll((ArrayList<String>) i.get("asksSumm"));
            bidsAmount.addAll((ArrayList<String>) i.get("bidsAmount"));
            bidsPrice.addAll((ArrayList<String>) i.get("bidsPrice"));
            bidsSumm.addAll((ArrayList<String>) i.get("bidsSumm"));

            ordersSellListAdapter.notifyDataSetChanged();
            ordersBuyListAdapter.notifyDataSetChanged();
        }
        names.clear();
        values.clear();
        if (i.get("names") != null)
        {
            names.addAll((ArrayList<String>) i.get("names"));
            values.addAll((ArrayList<String>) i.get("values"));
            alPairNames.clear();
            alPairNames.addAll(names);
            tempValues.clear();
            tempValues.addAll(alValues);
            alValues.clear();
            alValues.addAll(values);
            adapterMenuTickerList.notifyDataSetChanged();
        }
    }

}

自定义适配器方法：

public class OrdersListAdapter extends ArrayAdapter<String> {

private final Activity context;

private ArrayList<String> price;
private ArrayList<String> amount;
private ArrayList<String> summ;

public OrdersListAdapter(Activity context, ArrayList<String> price, ArrayList<String> amount, ArrayList<String> summ)
{
    super(context, R.layout.menu_tickerrows,  price);
    this.context = context;
    this.price = price;
    this.amount = amount;
    this.summ = summ;
}

static class ViewHolder {
    public TextView price;
    public TextView amount;
    public TextView summ;
}

@Override
public View getView(int pos, View convertView, ViewGroup parent)
{
    ViewHolder holder;
    View rowView = convertView;

    if (rowView == null)
    {
        LayoutInflater inflater = context.getLayoutInflater();
        rowView = inflater.inflate(R.layout.orders_list, null, true);
        holder = new ViewHolder();
        holder.price = (TextView) rowView.findViewById(R.id.tvPrice);
        holder.amount = (TextView) rowView.findViewById(R.id.tvAmount);
        holder.summ = (TextView) rowView.findViewById(R.id.tvSumm);


        rowView.setTag(holder);
    }
    else
    {
        holder = (ViewHolder) rowView.getTag();
    }

    holder.price.setText((CharSequence) price.get(pos));
    holder.amount.setText((CharSequence) amount.get(pos));
    holder.summ.setText((CharSequence) summ.get(pos));

    return rowView;
}

}

有时我会：

 java.lang.IndexOutOfBoundsException: Invalid index 31, size is 0

on

 holder.price.setText((CharSequence) price.get(pos));

当出现此错误时，我尝试滚动我的列表视图。

在

放置断点

      ordersSellListAdapter.notifyDataSetChanged();
      ordersBuyListAdapter.notifyDataSetChanged();

并且发现Bundle中存在相互更改的数据集。

解决

好的，我发现了我的错误。我的服务中创建了不同的线程，它们同时发送数据。我添加了一个源的检查，它会中断错误的线程。

ListViews使用不同的数据集闪烁

0 个答案: