我们最近在经过数月的测试后开始使用应用程序，我们得到一个与Spinner相关的例外（到目前为止只有三星设备）。虽然我们有堆栈跟踪，但我们无法收集他们的大量信息，所以我希望有人可以提供一些帮助。
该问题与HintAdapter有关。调用getItem和getView时，适配器似乎没有项目。我们真的不明白这是怎么回事，但我们真正关心的是为什么请求的索引是-1。有人如何选择负面指数？
这是stacktrace：
Fatal Exception: java.lang.ArrayIndexOutOfBoundsException: length=0; index=-1
at java.util.ArrayList.get(ArrayList.java:413)
at ca.example.mb.android.myexample.adapter.AbstractHintArrayAdapter.getItem(AbstractHintArrayAdapter.java:73)
at ca.example.mb.android.myexample.adapter.AbstractHintArrayAdapter.getView(AbstractHintArrayAdapter.java:136)
at android.widget.Spinner.makeView(Spinner.java:800)
at android.widget.Spinner.layout(Spinner.java:748)
at android.widget.Spinner.onLayout(Spinner.java:710)
at android.view.View.layout(View.java:18874)
at android.view.ViewGroup.layout(ViewGroup.java:5954)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1741)
at android.widget.LinearLayout.layoutHorizontal(LinearLayout.java:1730)
at android.widget.TableRow.onLayout(TableRow.java:122)
at android.view.View.layout(View.java:18874)
at android.view.ViewGroup.layout(ViewGroup.java:5954)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1741)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1585)
at android.widget.TableLayout.onLayout(TableLayout.java:445)
at android.view.View.layout(View.java:18874)
at android.view.ViewGroup.layout(ViewGroup.java:5954)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1741)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1585)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1494)
at android.view.View.layout(View.java:18874)
at android.view.ViewGroup.layout(ViewGroup.java:5954)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323)
at android.widget.FrameLayout.onLayout(FrameLayout.java:261)
at android.widget.ScrollView.onLayout(ScrollView.java:2534)
at android.view.View.layout(View.java:18874)
at android.view.ViewGroup.layout(ViewGroup.java:5954)
at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1079)
at android.view.View.layout(View.java:18874)
at android.view.ViewGroup.layout(ViewGroup.java:5954)
at android.support.v4.view.ViewPager.onLayout(ViewPager.java:1795)
at android.view.View.layout(View.java:18874)
at android.view.ViewGroup.layout(ViewGroup.java:5954)
at android.support.design.widget.HeaderScrollingViewBehavior.layoutChild(HeaderScrollingViewBehavior.java:131)
at android.support.design.widget.ViewOffsetBehavior.onLayoutChild(ViewOffsetBehavior.java:42)
at android.support.design.widget.AppBarLayout$ScrollingViewBehavior.onMeasureChild(AppBarLayout.java:1391)
at android.support.design.widget.CoordinatorLayout.onLayout(CoordinatorLayout.java:870)
at android.view.View.layout(View.java:18874)
at android.view.ViewGroup.layout(ViewGroup.java:5954)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323)
at android.widget.FrameLayout.onLayout(FrameLayout.java:261)
at android.view.View.layout(View.java:18874)
at android.view.ViewGroup.layout(ViewGroup.java:5954)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1741)
at android.widget.LinearLayout.layoutHorizontal(LinearLayout.java:1730)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1496)
at android.view.View.layout(View.java:18874)
at android.view.ViewGroup.layout(ViewGroup.java:5954)
at android.support.design.widget.HeaderScrollingViewBehavior.layoutChild(HeaderScrollingViewBehavior.java:131)
at android.support.design.widget.ViewOffsetBehavior.onLayoutChild(ViewOffsetBehavior.java:42)
at android.support.design.widget.AppBarLayout$ScrollingViewBehavior.onMeasureChild(AppBarLayout.java:1391)
at android.support.design.widget.CoordinatorLayout.onLayout(CoordinatorLayout.java:870)
at android.view.View.layout(View.java:18874)
at android.view.ViewGroup.layout(ViewGroup.java:5954)
at android.support.v4.widget.DrawerLayout.onLayout(DrawerLayout.java:1193)
at android.view.View.layout(View.java:18874)
at android.view.ViewGroup.layout(ViewGroup.java:5954)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323)
at android.widget.FrameLayout.onLayout(FrameLayout.java:261)
at android.view.View.layout(View.java:18874)
at android.view.ViewGroup.layout(ViewGroup.java:5954)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1741)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1585)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1494)
at android.view.View.layout(View.java:18874)
at android.view.ViewGroup.layout(ViewGroup.java:5954)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323)
at android.widget.FrameLayout.onLayout(FrameLayout.java:261)
at android.view.View.layout(View.java:18874)
at android.view.ViewGroup.layout(ViewGroup.java:5954)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1741)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1585)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1494)
at android.view.View.layout(View.java:18874)
at android.view.ViewGroup.layout(ViewGroup.java:5954)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323)
at android.widget.FrameLayout.onLayout(FrameLayout.java:261)
at com.android.internal.policy.DecorView.onLayout(DecorView.java:935)
at android.view.View.layout(View.java:18874)
at android.view.ViewGroup.layout(ViewGroup.java:5954)
at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2697)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2413)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1550)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:7189)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:959)
at android.view.Choreographer.doCallbacks(Choreographer.java:734)
at android.view.Choreographer.doFrame(Choreographer.java:670)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:945)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6776)
at java.lang.reflect.Method.invoke(Method.java)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1520)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1410)
这是HintArrayAdapter getItem和getView方法：
public T getItem(int position)
{
return optionElements.get(position);
}
public View getView(int position, View convertView, @NonNull ViewGroup parent)
{
ViewHolder viewHolder;
if (convertView == null)
{
viewHolder = new ViewHolder();
LayoutInflater inflater = LayoutInflater.from(this.getContext());
convertView = inflater.inflate(R.layout.search_spinner_item, parent, false);
viewHolder.textView = (TextView) convertView.findViewById(R.id.search_spinner_item_text_view);
convertView.setTag(viewHolder);
}
else
{
viewHolder = (ViewHolder) convertView.getTag();
}
T optionElement = getItem(position);
if (optionElement != null)
{
String textToDisplay = getViewText(optionElement);
viewHolder.textView.setText(textToDisplay);
}
return convertView;
}