Android - 使用光标适配器在 ListView 中格式化时间戳 [英] Android - Format Timestamp in ListView with Cursor Adapter

问题描述

我正在使用 SimpleCursorAdapter 来填充 Android ListView，并且想知道我应该如何将我从数据库中获取的所有时间戳(每个时间戳都在DATE_DATE"中)转换为人类可读的日期，也许使用 SimpleDateFormat?

I am using a SimpleCursorAdapter to populate an Android ListView, and was wondering how I should go about getting all of the timestamps I get from a database, each in "DATE_DATE" into human readable dates, maybe using SimpleDateFormat?

Cursor programDateCursor = mDbAdapter.loadProgramDates();

startManagingCursor(programDateCursor);

String[] from = new String[]{ "DATE_DATE" };

int[] to = new int[]{ R.id.text1 };

SimpleCursorAdapter programDates = 
             new SimpleCursorAdapter(this, R.layout.program_date,
                                      programDateCursor, from, to);

setListAdapter(programDates);

我没有用 Java 做过很多工作，那么有没有更好的方法/任何方法来做到这一点?除了事先将预先格式化的日期存储在数据库中之外，还有吗?

I've not done much work with Java, so is there a better way / any way to do this? Other than storing the preformatted dates in the database before hand, that is?

推荐答案

您将必须创建自定义 CursorAdapter 才能格式化时间戳.

You're going to have to create a custom CursorAdapter to be able to format your timestamps.

public class MyAdapter extends CursorAdapter {
    private final LayoutInflater mInflater;

    public MyAdapter(Context context, Cursor cursor) {
        super(context, cursor, false);
        mInflater = LayoutInflater.from(context);
    }

    @Override
    public View newView(Context context, Cursor cursor, ViewGroup parent) {
         return mInflater.inflate(R.layout.program_date, parent, false);
    }

    @Override
    public void bindView(View view, Context context, Cursor cursor) {
        long time = cursor.getLong(cursor.getColumnIndex("DATE_DATE")) * 1000L;

        Calendar cal = Calendar.getInstance();
        cal.setTimeInMillis(time);

        String format = "M/dd h:mm a";
        SimpleDateFormat sdf = new SimpleDateFormat(format);
        String dateString = sdf.format(cal.getTime());

        ((TextView) view.findViewById(R.id.text1)).setText(dateString);
    }
}

根据您的喜好更改 String format 的列表是 这里.

The list to change the String format to your liking is here.

然后你会使用这个适配器

You'd then use this adapter with

Cursor programDateCursor = mDbAdapter.loadProgramDates();
startManagingCursor(programDateCursor);

setListAdapter(new MyAdapter(this, programDateCursor));

这篇关于Android - 使用光标适配器在 ListView 中格式化时间戳的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！