使用SimpleCursorAdapter从Cursor更改值

时间:2010-08-31 12:43:06

标签: android sqlite cursor filtering

我的数据库表包含{Name,Time(UTC格式),Latitude,Longitude}

我使用带有SimpleCursorAdapter的ListActivity显示表。

我希望列Time以人类可读的格式显示时间(13-07-2010 10:40),而不是UTC格式(18190109089)。

如何指定时间列中的值需要一些过滤/适应?

可能的解决方案(有问题):

SimpleCursorAdapter提供方法:

setCursorToStringConverter(SimpleCursorAdapter.CursorToStringConverter cursorToStringConverter);

指定一个能够将Cursor转换为CharSequence的类(convertToString(Cursor cursor))。 无论如何,我不知道返回CharSequence参数的格式应该是哪种格式!

5 个答案:

答案 0 :(得分:74)


格式化游标值的最简单方法是使用SimpleCursorAdapter.setViewBinder(..):

SimpleCursorAdapter adapter = new SimpleCursorAdapter(this, R.layout.list, cursor,
            new String[] { Definition.Item.TITLE, Definition.Item.CREATE_DATE }, new int[] { R.id.title, R.id.createDate});

adapter.setViewBinder(new ViewBinder() {

    public boolean setViewValue(View aView, Cursor aCursor, int aColumnIndex) {

        if (aColumnIndex == 2) {
                String createDate = aCursor.getString(aColumnIndex);
                TextView textView = (TextView) aView;
                textView.setText("Create date: " + MyFormatterHelper.formatDate(getApplicationContext(), createDate));
                return true;
         }

         return false;
    }
});

答案 1 :(得分:13)

经过长时间的斗争,我也遇到了同样的问题,最后我找到了答案:)(见下文)

use setViewText (TextView v, String text)

例如

SimpleCursorAdapter shows = new SimpleCursorAdapter(this, R.layout.somelayout, accountCursor, from, to)
{
 @Override
 public void setViewText(TextView v, String text) {
 super.setViewText(v, convText(v, text));
}    
};

private String convText(TextView v, String text)
{

 switch (v.getId())
 {
 case R.id.date:
             String formatedText = text;
             //do format
            return formatedText;
        }
return text;
}

答案 2 :(得分:4)

您可以使用setViewBinder()或子类SimpleCursorAdapter并覆盖bindView()

答案 3 :(得分:4)

您可以使用该列的SQLite语法格式化日期。

这样的事情会做到这一点

SELECT strftime('%d-%m-%Y %H:%M',1092941466,'unixepoch');

SELECT strftime('%d-%m-%Y %H:%M',timecol,'unixepoch');

答案 4 :(得分:0)

通过这篇旧帖子,注意到我做了类似的事情可能有所帮助:

public class FormatCursorAdapter extends SimpleCursorAdapter {

protected int[] mFormats;

public static final int FORMAT_TEXT=0;
public static final int FORMAT_CURRENCY=1;
public static final int FORMAT_DATE=2;

public FormatCursorAdapter(Context context, int layout, Cursor c, String[] from, int[] to, int[] formats, int flags) {
    super(context, layout, c, from, to, flags);
    mFormats = formats;
    ViewBinder viewBinder = new ViewBinder() {
        @Override
        public boolean setViewValue(View view, Cursor cursor, int columnIndex) {
            int formatType = mFormats[columnIndex-1];
            switch (formatType) {
                case FORMAT_CURRENCY:
                    NumberFormat nf = NumberFormat.getCurrencyInstance();
                    nf.setMaximumFractionDigits(2);
                    ((TextView)view).setText(nf.format(cursor.getDouble(columnIndex)));
                    return true;
                case FORMAT_DATE:
                    DateFormat df = SimpleDateFormat.getDateTimeInstance();
                    ((TextView)view).setText(df.format(new Date(cursor.getLong(columnIndex))));
                    return true;
            }
            return false;
        }
    };
    setViewBinder(viewBinder);
}

}

用法:

    // For the cursor adapter, specify which columns go into which views with which format
    String[] fromColumns = {
            Table.COLUMN_TITLE,
            Table.COLUMN_AMOUNT,
            Table.COLUMN_DATE};
    int[] toViews = {
            R.id.tvTitle,
            R.id.tvAmount,
            R.id.tvDate};
    int[] formatViews = {
            FormatCursorAdapter.FORMAT_TEXT,
            FormatCursorAdapter.FORMAT_CURRENCY,
            FormatCursorAdapter.FORMAT_DATE};

    mAdapter=new FormatCursorAdapter(getContext(),R.layout.item_operation,cursor,
            fromOpsColumns,toOpsViews,formatViews,0);
    mListView.setAdapter(mOpsAdapter);

希望这可以帮助那里的任何人!