Android：如何在列表行内使用字符串数组列表

oxyt 发表于 Dev

奥克斯

我在自定义列表视图中苦苦挣扎。我想用row.xml包含五个textview的自定义文件填充列表视图。我有一个文本文件mytextfile.txt中raw的文件夹。看起来像这样：

SUN-9-JULY-On Sale Now-New York, Time Square
SAT-15-JULY-On Sale Now-London, National Gallery
MON-23-JULY-On Sale Now-Paris, The Eiffel Tower
// More lines here...

如您所见，我从每一行创建一个字符串数组（使用带有“-”的split方法）并将所有字符串数组放在内ArrayList。我不知道如何创建我的CustomAdapter课程来完成这项工作。我的其他文件看起来像...

Concerts.java

public class Concerts {

    private List<String[]> mAllConcerts;

    public List<String[]> getAllConcerts() {
        return mAllConcerts;
    }

    public Concerts() {
        mAllConcerts = new ArrayList<>();
        InputStream inputStream = null;
        InputStreamReader inputReader = null;
        BufferedReader bufferedReader;
        String line;
        try {
            inputStream = MainActivity.getGlobalContext().getResources()
                    .openRawResource(R.raw.mytextfile.txt);
            inputReader = new InputStreamReader(inputStream);
            bufferedReader = new BufferedReader(inputReader);
            while (( line = bufferedReader.readLine()) != null) {
                String [] mConcertDetails = line.split("-");
                mAllConcerts.add(mConcertDetails);
            }
        }
        catch (IOException e) {
            // cathing...
        }
        finally {
             // closing...
        }
    }
}

CustomAdapter.java（我什至不知道我是否在正确的路径上）

public class CustomAdapter extends ArrayAdapter<String> {

    TextView concertDayName;
    TextView concertDayNumber;
    TextView concertMonthName;
    TextView concertOnSaleNow;
    TextView concertPlaceName;

    Concerts concerts;

    public CustomAdapter(Context context, String[] values) {
        super(context, R.layout.concert_row, values);
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        LayoutInflater inflater = LayoutInflater.from(getContext());
        View view = inflater.inflate(R.layout.concert_row, parent, false);

        concerts = new Concerts();

        concertDayName = (TextView) view.findViewById(R.id.concert_day_name);
        concertDayNumber = (TextView) view.findViewById(R.id.concert_day_number);
        concertMonthName = (TextView) view.findViewById(R.id.concert_month_name);
        concertOnSaleNow = (TextView) view.findViewById(R.id.concert_on_sale_now);
        concertPlaceName = (TextView) view.findViewById(R.id.concert_place_name);

        for(int i = 0; i < concerts.getAllConcerts().size(); i++) {
            String[] concertRow = concerts.getAllConcerts().get(i);
            concertDayName.setText(concertRow[0]);
            concertDayNumber.setText(concertRow[1]);
            concertMonthName.setText(concertRow[2]);
            concertOnSaleNow.setText(concertRow[3]);
            concertPlaceName.setText(concertRow[4]);
        }
        return view;
    }
}

MenuConcerts.java（这是将显示列表的片段）

public class MenuConcerts extends Fragment {

    String[] concertDetails;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.concerts_layout, container, false);

        ((MainActivity) getActivity()).setActionBarTitle(getString(R.string.title_spelningar));

        ListAdapter listAdapter = new CustomerAdapter(getActivity(), concertDetails);

        return view;
    }
}

亚历杭德罗·坎帕

我建议您使用对象的ArrayList而不是字符串数组的数组来做CustomAdapter：

Public Class Concert {
private String dayName;
private String dayNumber;
// constructors, getter and setters
}

因此，您只需执行以下操作：

   public class CustomAdapterextends BaseAdapter {

Context context;

protected List<Concert> listConcert;
LayoutInflater inflater;

public ListCarsAdapter(Context context, List<Concert> listConcert) {
    this.listConcert= listConcert;
    this.inflater = LayoutInflater.from(context);
    this.context = context;
}

public int getCount() {
    return listConcert.size();
}

public Concert getItem(int position) {
    return listConcert.get(position);
}

public View getView(int position, View convertView, ViewGroup parent) {
    ViewHolder holder;
    if (convertView == null) {

        holder = new ViewHolder();
        convertView = this.inflater.inflate(R.layout.concert_row,parent, false);

        holder.concertDayName = (TextView) convertView
                .findViewById(R.id.concert_day_name);
        holder.concertDayNumber= (TextView) convertView
                .findViewById(R.id.concert_day_number);
        holder.concertMonthName = (TextView) convertView
                .findViewById(R.id.concert_month_name);
        holder.concertOnSaleNow = (TextView) convertView
                .findViewById(R.id.concert_on_sale_now);
        holder.concertPlaceName = (TextView) convertView
                .findViewById(R.id.concert_place_name);

        convertView.setTag(holder);
    } else {
        holder = (ViewHolder) convertView.getTag();
    }

    Concert concert = listConcert.get(position);
    holder.concertDayName .setText(concert.getDayName());
    holder.concertDayNumber.setText(concert.getDayNumber());
    //etc.
    return convertView;
}

private class ViewHolder {
    TextView concertDayName;
    TextView concertDayNumber;
    Textview concertMonthName;
    Textview concertOnSaleNow;
    Textview concertPlaceName;
}

}

您的活动：

public class MenuConcerts extends Fragment {

ArrayList<Concert> arrayConcert = new ArrayList<Concert>();


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.concerts_layout, container, false);

        ((MainActivity) getActivity()).setActionBarTitle(getString(R.string.title_spelningar));
 // all the reading file logic here;
        ListAdapter listAdapter = new CustomerAdapter(getActivity(), arrayConcert);

        return view;
    }
}