14

我认为这是专家的问题。

我从ListView数据列表中getView()接到位置超出 范围的电话。 当我使用适配器过滤器时会发生这种情况。filter方法使用比原始列表小的过滤列表填充数据。 当新的过滤列表比以前的 过滤列表短时，似乎会发生错误。我更改了代码以在越界时返回一个虚拟的convertView，只是为了查看发出了多少这样的调用。
publishResults()
getView()

这些是相关代码和log我记录的消息：

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        // No logs here to keep ListView performance good
        Log.d(TAG, "+ getView( position=" + position + ")");
        ViewHolder holder;

        if( position >= mData.size() ) {
            // This code allows to see how many bad calls I get
            Log.w(TAG, "position out of bounds!");
            convertView = mInflater.inflate(mLayout, parent, false);
            return convertView;
        }

        . . . // Normal getView code

        return convertView;
    }

在过滤器中（从ArrayAdapter源代码中复制的代码）

        @Override
        protected void publishResults(CharSequence constraint, FilterResults results) {
            Log.pe(TAG, "+ publishResults(constraint:" + constraint + ", results.count:" + results.count + ")");
            //noinspection unchecked
            mData = (ArrayList<String>) results.values;
            if (results.count > 0) {
                notifyDataSetChanged();
            } else {
                notifyDataSetInvalidated();
            }
            Log.px(TAG, "- publishResults()");
        }

日志文件显示，经过 7 个结果的过滤器后，出现了一个具有 3 个结果的过滤器，但getView不断收到 7 个项目的调用（我标记***了越界调用）：

02-26 05:31:55.986: D/ViewerActivity(22857): + onQueryTextChange(newText:log)
02-26 05:31:55.986: D/ViewerActivity(22857): - onQueryTextChange()
02-26 05:31:56.029: D/LogScreenAdapter(22857): + performFiltering(prefix:log)
02-26 05:31:56.113: D/dalvikvm(22857): GC_CONCURRENT freed 378K, 5% free 13577K/14215K, paused 0ms+1ms
02-26 05:31:56.153: D/LogScreenAdapter(22857): - performFiltering()
02-26 05:31:56.153: D/LogScreenAdapter(22857): + publishResults(constraint:log, results.count:7)
02-26 05:31:56.167: D/LogScreenAdapter(22857): - publishResults()
02-26 05:31:56.167: D/LogScreenAdapter(22857): + getView( position=0)
02-26 05:31:56.167: D/LogScreenAdapter(22857): + getView( position=0)
02-26 05:31:56.167: D/LogScreenAdapter(22857): + getView( position=0)
02-26 05:31:56.167: D/LogScreenAdapter(22857): + getView( position=1)
02-26 05:31:56.167: D/LogScreenAdapter(22857): + getView( position=2)
02-26 05:31:56.167: D/LogScreenAdapter(22857): + getView( position=3)
02-26 05:31:56.167: D/LogScreenAdapter(22857): + getView( position=4)
02-26 05:31:56.167: D/LogScreenAdapter(22857): + getView( position=5)
02-26 05:31:56.167: D/LogScreenAdapter(22857): + getView( position=6)
02-26 05:31:56.167: D/LogScreenAdapter(22857): + getView( position=0)
02-26 05:31:56.167: D/LogScreenAdapter(22857): + getView( position=1)
02-26 05:31:56.167: D/LogScreenAdapter(22857): + getView( position=2)
02-26 05:31:56.167: D/LogScreenAdapter(22857): + getView( position=3)
02-26 05:31:56.167: D/LogScreenAdapter(22857): + getView( position=4)
02-26 05:31:56.493: D/LogScreenAdapter(22857): + getView( position=5)
02-26 05:31:56.503: D/LogScreenAdapter(22857): + getView( position=6)
02-26 05:32:23.793: D/ViewerActivity(22857): + onQueryTextChange(newText:logs)
02-26 05:32:23.793: D/ViewerActivity(22857): - onQueryTextChange()
02-26 05:32:23.813: D/LogScreenAdapter(22857): + performFiltering(prefix:logs)
02-26 05:32:23.854: D/dalvikvm(22857): GC_CONCURRENT freed 383K, 5% free 13577K/14215K, paused 0ms+0ms
02-26 05:32:23.924: D/dalvikvm(22857): GC_CONCURRENT freed 388K, 5% free 13573K/14215K, paused 0ms+1ms
02-26 05:32:23.974: D/LogScreenAdapter(22857): - performFiltering()
02-26 05:32:23.983: D/LogScreenAdapter(22857): + publishResults(constraint:logs, results.count:3)
02-26 05:32:23.983: D/LogScreenAdapter(22857): - publishResults()
02-26 05:32:23.983: D/LogScreenAdapter(22857): + getView( position=0)
02-26 05:32:24.074: D/LogScreenAdapter(22857): + getView( position=0)
02-26 05:32:24.093: D/LogScreenAdapter(22857): + getView( position=0)
02-26 05:32:24.113: D/LogScreenAdapter(22857): + getView( position=1)
02-26 05:32:24.155: D/LogScreenAdapter(22857): + getView( position=2)
02-26 05:32:24.164: D/LogScreenAdapter(22857): + getView( position=3)
*** 02-26 05:32:24.193: W/LogScreenAdapter(22857): position out of bounds!
02-26 05:32:24.233: D/LogScreenAdapter(22857): + getView( position=4)
*** 02-26 05:32:24.263: W/LogScreenAdapter(22857): position out of bounds!
02-26 05:32:24.284: D/LogScreenAdapter(22857): + getView( position=5)
*** 02-26 05:32:24.313: W/LogScreenAdapter(22857): position out of bounds!
02-26 05:32:24.333: D/LogScreenAdapter(22857): + getView( position=6)
*** 02-26 05:32:24.343: W/LogScreenAdapter(22857): position out of bounds!
02-26 05:32:24.353: D/LogScreenAdapter(22857): + getView( position=0)
02-26 05:32:24.373: D/LogScreenAdapter(22857): + getView( position=1)
02-26 05:32:24.383: D/LogScreenAdapter(22857): + getView( position=2)
02-26 05:32:24.403: D/LogScreenAdapter(22857): + getView( position=3)
*** 02-26 05:32:24.413: W/LogScreenAdapter(22857): position out of bounds!
02-26 05:32:24.433: D/LogScreenAdapter(22857): + getView( position=4)
*** 02-26 05:32:24.443: W/LogScreenAdapter(22857): position out of bounds!
02-26 05:32:24.463: D/LogScreenAdapter(22857): + getView( position=5)
*** 02-26 05:32:24.475: W/LogScreenAdapter(22857): position out of bounds!
02-26 05:32:24.483: D/LogScreenAdapter(22857): + getView( position=6)
*** 02-26 05:32:24.503: W/LogScreenAdapter(22857): position out of bounds!
02-26 05:38:26.769: D/dalvikvm(22857): GC_CONCURRENT freed 316K, 5% free 13640K/14215K, paused 0ms+1ms

您在这里看到的是，该publishResults()方法确实将 mData 从 7 项列表更改为更短的 3 项列表，请参见上面的代码，但Adapter不断收到getView()对 7 项列表的调用，即使它不再存在。
注意notifyDataSetChanged()已经调用了新的数据赋值，所以ListView应该知道新的列表。

4

3 回答 3

22

你在public int getCount()自定义列表视图适配器的方法中返回什么？

你应该像这样返回mData != null? mData.size() : 0，

超出债券的位置可能是由于您返回的列表大小超过了要在列表中显示的数据

getCount()自定义列表适配器的方法指定列表视图的大小，因此它应该是您在列表中传递的数据的大小

于 2013-02-27T06:00:36.550 回答
20

似乎覆盖“getCount（）”方法将解决您的问题：

@Override
public int getCount() {
    return mData.size();
}
于 2013-02-27T06:00:05.320 回答
0

我这样做了，它解决了我的问题

@Override
public int getCount() {

    if (isFiltered == true) {
        return myFilteredArray.size();
    }

    return myUnfilteredArray.size();
}
于 2013-11-17T06:36:00.373 回答