java – Dynamic Spinners – 如果从一个微调器中选择一个项目,

我已经尝试通过ArrayList的字符串和ArrayAdapters删除项目,但我注意到,一旦从列表中删除它,选择不再引用列表项(因为它不再存在).

现在假设,我有4个动态创建的微调器,它们都具有与其资源相同的ArrayList,现在我想使用此适配器从1个微调器中获取所选项目的位置,然后将其从其他3个微调器中隐藏.

for (int i = 0; i < numberOfStops; i++) {
                AddStopView stopView = new AddStopView(getActivity());
                stopView.setCallback(BaseBookingFragment.this);
                stopView.setPassengerNames(extraPassengerNames);
                stopViews.add(stopView);
                parent.addView(stopView,viewPosition);
            }

在上面的代码中,我动态创建停止视图,每个停止视图都有乘客名称微调器.并且这些所有微调器都具有与其资源相同的ArrayList.

AddStopView.java中的一段代码

public AddStopView(Context context) {
    super(context);
    initialize();
}

public void setCallback(StopViewCallback callback) {
    this.callback = callback;
}

public void setPassengerNames(List<String> passengerNames) {
    this.passengerNames = passengerNames;
    passengerAdapter.setNames(passengerNames);
}

private void initialize() {
    inflate(getContext(),R.layout.view_stop,this);

    passengerAdapter = new ExtraPassengerAdapter(getContext());
    passengerAdapter.setNames(passengerNames);
    nameSpinner.setAdapter(passengerAdapter);
    nameSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
        @Override
        public void onItemSelected(AdapterView<?> parent,View view,int position,long id) {
            if (view == null) {
                return;
            }
            passengerName = (String) view.getTag();

            if (position != 0)
                callback.updatePassengerList(AddStopView.this,(position - 1));
        }

        @Override
        public void onNothingSelected(AdapterView<?> parent) {

        }
    });
}

nameSpinner.setOnItemSelectedListener的回调代码

@Override
public void updatePassengerList(AddStopView addStopView,int position) {

    for (String passName : extraPassengerNames) {
        if (addStopView.getPassengerName().equals(passName)) {
            extraPassengerNames.remove(passName);
            break;
        }
    }

    for (AddStopView stopView : stopViews) {
        if (!stopView.equals(addStopView))
            stopView.setPassengerNames(extraPassengerNames);
    }
}

来自ExtraPassengerAdapter.java的代码

public class ExtraPassengerAdapter extends BaseAdapter {
private List<String> names = new ArrayList<>();
private Context context;

public ExtraPassengerAdapter(Context context) {
    this.context = context;
    names.add(get0Position());
}


public void setNames(List<String> names) {
    this.names.clear();
    this.names.add(get0Position());
    this.names.addAll(names);
    notifyDataSetChanged();
}

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

@Override
public String getItem(int position) {
    return names.get(position);
}

@Override
public long getItemId(int position) {
    return 0;
}

@Override
public View getView(int position,View convertView,ViewGroup parent) {
    TextView textView = (TextView) LayoutInflater.from(parent.getContext()).inflate(R.layout.adapter_stop,parent,false);
    String name = getItem(position);
    textView.setText(name);
    textView.setTag(name);
    return textView;
}

private String get0Position() {
    return context.getString(R.string.passenger_name);
}

}