Question

我认为这是专家的问题。

我从 ListView 数据列表中使用 positon 越界来调用getView()。
当我使用适配器过滤器时会发生这种情况过滤器publishResults()方法使用小于原始列表的过滤列表填充数据当新筛选列表比前一个筛选列表短时，似乎会发生错误。我更改了getView()的代码，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。

这些是我记录的相关代码和log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（代码从ArrayAdapter源代码复制）

        @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，在包含7个结果的过滤器之后，会有一个包含3个结果的fitler，但是getView不断调用7个项目（我用***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

您在此处看到，publishResults()方法确实将mData从7个项目的列表更改为3个项目的较短列表，请参阅上面的代码，但Adapter继续获取{{1}调用7个项目列表，即使它不再存在请注意，getView()已使用新数据分配进行调用，因此notifyDataSetChanged()应该知道新列表。

Answer 1

您在自定义列表视图适配器的public int getCount()方法中返回了什么？

您应该返回mData != null? mData.size() : 0，

由于可能是您返回列表的大小而不是列表中显示的数据，因此可能会出现债券的位置

自定义列表适配器的

getCount()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

Answer 2

似乎覆盖“getCount（）”方法将解决您的问题：

@Override
public int getCount() {
    return mData.size();
}

Answer 3

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();
}

过滤后Android ListView数组索引越界

3 个答案: