ArrayAdapter类的IndexOutOfBoundsException问题

我试图弄清楚为什么我会收到以下错误。

java.lang.IndexOutOfBoundsException: Invalid index 2, size is 2
        at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:255)
        at java.util.ArrayList.get(ArrayList.java:308)
        at com.modup.adapter.WorkoutCardsAdapter.getItem(WorkoutCardsAdapter.java:75)
        at com.modup.fragment.CreateFragment$1.onPressed(CreateFragment.java:143)
        at com.modup.adapter.WorkoutCardsAdapter$1.onClick(WorkoutCardsAdapter.java:62)
        at android.view.View.performClick(View.java:4442)
        at android.view.View$PerformClick.run(View.java:18473)
        at android.os.Handler.handleCallback(Handler.java:733)
        at android.os.Handler.dispatchMessage(Handler.java:95)
        at android.os.Looper.loop(Looper.java:136)
        at android.app.ActivityThread.main(ActivityThread.java:5105)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:515)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:792)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:608)
        at dalvik.system.NativeStart.main(Native Method)

我看到了很多关于这个话题的帖子,但它们似乎都有相同的答案,在实施了这些答案之后,问题似乎仍然存在。

我的案例:

我有一个扩展ArrayAdapter<>,这个Adapter类用于在片段中填充ListView。一切都很好,我可以添加视图,我可以删除视图(某种程度上),我可以访问实现的回调。

问题: 似乎当我添加许多视图3-4+并开始删除它们时,我最终会遇到这个例外。

具体情况: 如果我从顶部视图列表项开始,向下看,我似乎不会抛出错误,而且有时也可以从底部向上看。如果我将视图按顺序删除(有时),似乎会出现错误。

如何解决此问题?我是否错误地重写了getCount()和getItem()?

更新:

检查mCallback.onPress(位置)的位置时;它看起来好像列表中第一个项目的位置是0,并且只要我不尝试删除它下面的任何列表项目,它将保持为0。一旦我删除了它下面的列表项目,第一个列表项目将具有完全不同的位置。

公共类WorkoutCardsAdapter扩展了ArrayAdapter{

private LayoutInflater mInflater;
private String[] repArray, setArray, mgArray;
String TAG = WorkoutCardsAdapter.class.getCanonicalName();
Callback mCallback;
List<WorkoutView> mViews;

public WorkoutCardsAdapter(Context context, List<WorkoutView> views, Callback callback) {
    super(context, 0, views);
    mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    mCallback = callback;
    this.mViews = views;
}

@Override
public View getView(final int position, View convertView, ViewGroup parent) {
    final ViewHolder holder;
    if (convertView == null) {
        convertView = mInflater.inflate(R.layout.single_workout_layout, parent, false);
        holder = new ViewHolder();
        holder.spinnerReps = (Spinner) convertView.findViewById(R.id.spinnerReps);
        holder.spinnerSets = (Spinner) convertView.findViewById(R.id.spinnerSets);
        holder.spinnerMuscleGroup = (Spinner) convertView.findViewById(R.id.spinnerWorkoutGroup);
        holder.etWorkoutName = (EditText) convertView.findViewById(R.id.etWorkoutName);
        holder.btnRemoveWorkout = (Button) convertView.findViewById(R.id.btnRemoveWorkout);
        convertView.setTag(holder);
    } else {
        holder = (ViewHolder) convertView.getTag();
    }
    holder.btnRemoveWorkout.setTag(position);

    mgArray = getContext().getResources().getStringArray(R.array.string_array_muscle_groups);
    TextSpinnerAdapter adapter = new TextSpinnerAdapter(getContext(), R.layout.spinner_text_item, mgArray);
    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    holder.spinnerMuscleGroup.setAdapter(adapter);

    setArray = getContext().getResources().getStringArray(R.array.string_array_sets);
    TextSpinnerAdapter adapter1 = new TextSpinnerAdapter(getContext(), R.layout.spinner_text_item, setArray);
    adapter1.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    holder.spinnerSets.setAdapter(adapter1);

    repArray = getContext().getResources().getStringArray(R.array.string_array_reps);
    TextSpinnerAdapter adapter2 = new TextSpinnerAdapter(getContext(), R.layout.spinner_text_item, repArray);
    adapter2.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    holder.spinnerReps.setAdapter(adapter2);

    holder.btnRemoveWorkout.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            int position = (Integer) v.getTag();
            mCallback.onPressed(position);
        }
    });

    return convertView;
}

@覆盖 public WorkoutView getItem(最终int位置){ return mViews.get(位置); }

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

public interface Callback {
    void onPressed(int pos);
}

private static class ViewHolder {
    public Spinner spinnerMuscleGroup;
    public Spinner spinnerSets;
    public Spinner spinnerReps;
    public EditText etWorkoutName;
    public Button btnRemoveWorkout;
}

}

以下是带有回调的适配器实现

mWorkoutCardsAdapter = new WorkoutCardsAdapter(getActivity(), mArrayList, new WorkoutCardsAdapter.Callback() {
    @Override
    public void onPressed(int pos) {
            mWorkoutCardsAdapter.remove(mWorkoutCardsAdapter.getItem(pos));
            mWorkoutCardsAdapter.notifyDataSetChanged();
    }
});

如果有帮助,这就是我在按下按钮时添加新视图的方式

    workoutView = new WorkoutView(getActivity());
    mWorkoutCardsAdapter.add(workoutView);
    mWorkoutCardsAdapter.notifyDataSetChanged();