Android的力量亲近JodaTime [英] Android force close with JodaTime

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本文介绍了Android的力量亲近JodaTime的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

有没有人使用jodatime与Android?我越来越紧密,不留痕迹的力量。

 包test.journal.help;进口java.util.Date;进口org.joda.time.DateTime;
进口org.joda.time.Days;进口android.app.Activity;
进口android.os.Bundle;
公共类journaltester延伸活动{
    / **当第一次创建活动调用。 * /    私人今天的日期=新的日期();    公共无效的onCreate(捆绑savedInstanceState){
        super.onCreate(savedInstanceState);
      天天= Days.daysBetween(新日期时间(今天),新日期时间(今天));
        的setContentView(R.layout.main);    }
}

今天的价值:星期六8月7日0点00分○○秒美国/纽约2010

好吧取得一些进展...
获得根据kiwidoc在org.joda.time.DateTimeZone.getDefault()一个计算器这个错误造成,如果区域为null。

 公共静态DateTimeZone getDefault(){
    DateTimeZone区= cDefault;
    如果(区== NULL){
        同步(DateTimeZone.class){
            区段= cDefault;
            如果(区== NULL){
                DateTimeZone温度= NULL;
                尝试{
                    尝试{
                        TEMP = FORID(System.getProperty(user.timezone));
                    }赶上(RuntimeException的前){
                        //忽略
                    }
                    如果(临时== NULL){
                        TEMP = forTimeZone(TimeZone.getDefault());
                    }
                }赶上(抛出:IllegalArgumentException前){
                    //忽略
                }
                如果(临时== NULL){
                    TEMP = UTC;
                }
                cDefault =区段=温度;
            }
        } // LINE 147
    }
    返回区;
}

继承人的堆栈:

 发[3;>主](吊(例外的StackOverflowError))
DateTimeZone.getDefault()行:147
ISOChronology.getInstance()行:86
DateTimeUtils.getChronology(年表)线:231
DateConverter(AbstractConverter).getChronology(对象,年表)行:82
。日期时间(BaseDateTime)LT; INIT>(对象,年表)线:170
。日期时间<&初始化GT;(对象)线:168
PlantsCursorAdapter.newView(背景下,光标的ViewGroup)行:71
PlantsCursorAdapter(CursorAdapter的).getView(INT,查看,ViewGroup中)线:182


解决方案

这是因为 user.timezone 系统属性为null。见<一href=\"http://sourceforge.net/tracker/?func=detail&aid=3056104&group_id=97367&atid=617889\" rel=\"nofollow\">http://sourceforge.net/tracker/?func=detail&aid=3056104&group_id=97367&atid=617889

Has anybody used jodatime with android? I'm getting a force close with no trace.

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);

    }
}

Value of today : "Sat Aug 07 00:00:00 America/New_York 2010"

alright making some progress... getting a stackoverflow error at org.joda.time.DateTimeZone.getDefault() according to kiwidoc this is caused if zone is null.

 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;
}

Heres the stack:

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  

解决方案

This occurs because user.timezone system property is null. See http://sourceforge.net/tracker/?func=detail&aid=3056104&group_id=97367&atid=617889

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