java - Android用JodaTime强制关闭

有人在Android上使用jodatime吗？我逼近无踪。

package test.journal.help;

import java.util.Date;

import org.joda.time.DateTime;
import org.joda.time.Days;

import android.app.Activity;
import android.os.Bundle;
public class journaltester extends Activity {
    /** Called when the activity is first created. */

    private Date today = new Date();

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
      Days days = Days.daysBetween(new DateTime(today), new DateTime(today));
        setContentView(R.layout.main);

    }
}

今天的价值：“ 2010年8月7日星期六/美国/纽约”

好吧，进步了...
根据kiwidoc在org.joda.time.DateTimeZone.getDefault（）处获取stackoverflow错误，这是如果zo​​ne为null引起的。

 public static DateTimeZone getDefault() {
    DateTimeZone zone = cDefault;
    if (zone == null) {
        synchronized(DateTimeZone.class) {
            zone = cDefault;
            if (zone == null) {
                DateTimeZone temp = null;
                try {
                    try {
                        temp = forID(System.getProperty("user.timezone"));
                    } catch (RuntimeException ex) {
                        // ignored
                    }
                    if (temp == null) {
                        temp = forTimeZone(TimeZone.getDefault());
                    }
                } catch (IllegalArgumentException ex) {
                    // ignored
                }
                if (temp == null) {
                    temp = UTC;
                }
                cDefault = zone = temp;
            }
        } //LINE 147
    }
    return zone;
}

这是堆栈：

Thread [<3> main] (Suspended (exception StackOverflowError))
DateTimeZone.getDefault() line: 147
ISOChronology.getInstance() line: 86
DateTimeUtils.getChronology(Chronology) line: 231
DateConverter(AbstractConverter).getChronology(Object, Chronology) line: 82
DateTime(BaseDateTime).<init>(Object, Chronology) line: 170
DateTime.<init>(Object) line: 168
PlantsCursorAdapter.newView(Context, Cursor, ViewGroup) line: 71
PlantsCursorAdapter(CursorAdapter).getView(int, View, ViewGroup) line: 182

最佳答案

这是因为user.timezone系统属性为null。见http://sourceforge.net/tracker/?func=detail&aid=3056104&group_id=97367&atid=617889