Question

我一直试图解决这个简单的问题两天，但没有成功。我知道之前有过类似的问题（比如这里： How do you get the selected value of a Spinner?），但我还没有解决这个问题。

所以，我创建了一个包含微调器和自定义ListView的简单应用程序。微调器（包含值1,2,3,4,5 ..）为ListView创建更多的微调器（包含播放器名称）（例如，选择4创建四个微调器）。目前，该程序运行正常，但我不知道如何在单击操作栏中的按钮时在ListView中获取微调器的选定值？我尝试使用getItemAtPosition和getSelectedXXX（）方法但是我总是倾向于从最近选择的单个微调器中获取值。

我不确定是否必须调用Spinner的setOnItemSelectedListener（）中的方法，或者我可以从SpinnerAdapter类外部调用这些值。

这是自定义Spinner类

public class PlayerAdapter extends ArrayAdapter<String> {

        public PlayerAdapter(ArrayList<String> mPlayers) {
            super(getActivity(), 0, mPlayers);
        }
        public View getView(int position, View convertView, ViewGroup parent) {

            if (convertView == null) {
                convertView = getActivity().getLayoutInflater().inflate(
                        R.layout.list_item_players, null);
            }
            Spinner mSpinnerPlayer = (Spinner) convertView
                    .findViewById(R.id.spinner_player);

            ArrayAdapter<Player> spinnerAdapterPlayer = new ArrayAdapter<Player>(getActivity(), android.R.layout.simple_spinner_item, mPlayers);
        spinnerAdapterPlayer.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); 
            mSpinnerPlayer.setAdapter(spinnerAdapterPlayer);
            mSpinnerPlayer.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
                @Override
                public void onItemSelected(AdapterView<?> parent, View view,
                        int pos, long id) {
                    // TODO Auto-generated method stub
//Should I use getItemAtPosition or getSelectedXXX methods here?
                }

                @Override
                public void onNothingSelected(AdapterView<?> parent) {
                    // TODO Auto-generated method stub
                }
            });
            return convertView;
        }   
    }
}

这是片段膨胀布局创建第一个微调器（抱歉格式和代码样式）

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setRetainInstance(true);
    setHasOptionsMenu(true);

//gets player names from a database, such as "Player 1", "Player 2" etc..
//this is container of the spinners displayed in the listview
    mPlayers = PlayerDB
            .get(getActivity())
            .getPlayers();

}

public View onCreateView(LayoutInflater inflater, ViewGroup parent,
            Bundle savedInstanceState) {

        view = inflater.inflate(R.layout.fragment_menu, parent, false);

        listView = (ListView) view.findViewById(R.id.listView1);
        mSpinnerNumOfPlayers = (Spinner) view.findViewById(R.id.spinner_numOfPlayers);

        ArrayAdapter<CharSequence> spinnerAdapter = ArrayAdapter
                .createFromResource(this.getActivity(),
                        R.array.numberOfPlayers_array,
                        android.R.layout.simple_spinner_item);

        spinnerAdapter
                .setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);


        mSpinnerNumOfPlayers.setAdapter(spinnerAdapter);
        mSpinnerNumOfPlayers.setOnItemSelectedListener(new OnItemSelectedListener() {

            @Override
            public void onItemSelected(AdapterView<?> parent, View view,
                    int pos, long id) {
                String position = parent.getItemAtPosition(pos).toString();
                mArray = new ArrayList<String>();
                posInt = Integer.parseInt(position);

                 for (int i = 0; i < posInt; i++) {
                 mArray.add("" + i);
                 }

            PlayerAdapter adapter = new PlayerAdapter(mArray);
            listView.setAdapter(adapter);
            }

            @Override
            public void onNothingSelected(AdapterView<?> arg0) {
            }
        });

        listView.setOnItemClickListener(new OnItemClickListener()
                {
                    @Override
                    public void onItemClick(AdapterView<?> parent, View view,
                            int position, long id) {
                        // TODO Auto-generated method stub
                    }   
                }       
        );

        return view;
    }
    // ActionBar
    @Override
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
        super.onCreateOptionsMenu(menu, inflater);
        inflater.inflate(R.menu.main, menu);
    }
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
        case R.id.menu_item_start:
        //when "start" button is clicked the spinner values are saved into an ArrayList

Answer 1

此方法将从微调器中返回所选项目。

spinner.getSelectedItem().toString()

如何获取ListView中显示的Spinners的值？

1 个答案: