Android解析String to Date - 未知模式字符'X' [英] Android parse String to Date - unknown pattern character 'X'

问题描述

我有服务从网络获取日期字符串，然后我想将其削减到日期对象。但不知何故应用程序崩溃。
这是我正在解析的字符串： 2015-02-05T05：20：02 + 00:00

I have Service fetch date string from web and then I want to pare it to Date object. But somehow application crashes. This is my string that I'm parsing: 2015-02-05T05:20:02+00:00

onStartCommand（）

String datetime = "2015-02-05T05:20:02+00:00";
Date new_date = stringToDate(datetime);

stringToDate（）

private Date stringToDate(String s){
    DateFormat df = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssXXX");
    try{
        return df.parse(s);
    }catch(ParseException e){
        e.printStackTrace();
    }
    return null;
}

LogCat：

02-06 20:37:02.008: E/AndroidRuntime(28565): FATAL EXCEPTION: main
02-06 20:37:02.008: E/AndroidRuntime(28565): Process: com.dotmav.runescapenotifier, PID: 28565
02-06 20:37:02.008: E/AndroidRuntime(28565): java.lang.RuntimeException: Unable to start service com.dotmav.runescapenotifier.GEService@384655b5 with Intent { cmp=com.dotmav.runescapenotifier/.GEService }: java.lang.IllegalArgumentException: Unknown pattern character 'X'
02-06 20:37:02.008: E/AndroidRuntime(28565):    at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:2881)
02-06 20:37:02.008: E/AndroidRuntime(28565):    at android.app.ActivityThread.access$2100(ActivityThread.java:144)
02-06 20:37:02.008: E/AndroidRuntime(28565):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1376)
02-06 20:37:02.008: E/AndroidRuntime(28565):    at android.os.Handler.dispatchMessage(Handler.java:102)
02-06 20:37:02.008: E/AndroidRuntime(28565):    at android.os.Looper.loop(Looper.java:135)
02-06 20:37:02.008: E/AndroidRuntime(28565):    at android.app.ActivityThread.main(ActivityThread.java:5221)
02-06 20:37:02.008: E/AndroidRuntime(28565):    at java.lang.reflect.Method.invoke(Native Method)
02-06 20:37:02.008: E/AndroidRuntime(28565):    at java.lang.reflect.Method.invoke(Method.java:372)
02-06 20:37:02.008: E/AndroidRuntime(28565):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
02-06 20:37:02.008: E/AndroidRuntime(28565):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
02-06 20:37:02.008: E/AndroidRuntime(28565): Caused by: java.lang.IllegalArgumentException: Unknown pattern character 'X'
02-06 20:37:02.008: E/AndroidRuntime(28565):    at java.text.SimpleDateFormat.validatePatternCharacter(SimpleDateFormat.java:314)
02-06 20:37:02.008: E/AndroidRuntime(28565):    at java.text.SimpleDateFormat.validatePattern(SimpleDateFormat.java:303)
02-06 20:37:02.008: E/AndroidRuntime(28565):    at java.text.SimpleDateFormat.<init>(SimpleDateFormat.java:356)
02-06 20:37:02.008: E/AndroidRuntime(28565):    at java.text.SimpleDateFormat.<init>(SimpleDateFormat.java:249)
02-06 20:37:02.008: E/AndroidRuntime(28565):    at com.dotmav.runescapenotifier.GEService.stringToDate(GEService.java:68)
02-06 20:37:02.008: E/AndroidRuntime(28565):    at com.dotmav.runescapenotifier.GEService.onStartCommand(GEService.java:44)
02-06 20:37:02.008: E/AndroidRuntime(28565):    at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:2864)
02-06 20:37:02.008: E/AndroidRuntime(28565):    ... 9 more

编辑： onDestroy（）为定期更新设置闹钟...

onDestroy() set alarm for periodical update...

AlarmManager alarm = (AlarmManager)getSystemService(ALARM_SERVICE);
alarm.set(
    AlarmManager.RTC_WAKEUP,
    System.currentTimeMillis() + (1000 * 60),
    PendingIntent.getService(this, 0, new Intent(this, GEService.class), 0)
);

推荐答案

从

DateFormat df = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssXXX");

一切正常。

浏览可在 SimpleDateFormat 构造函数中使用的符号列表。这是文档

Go through the list of symbols that can be used inside a SimpleDateFormat constructor. This is the documentation

可能你正在寻找yyyy-MM-dd'T'HH：mm：ss.SSSZ

将您的代码更改为

DateFormat df = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS"); 

或

DateFormat df = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZ"); // if timezone is required

这篇关于Android解析String to Date - 未知模式字符'X'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！