java.lang.NumberFormatException: Invalid int: ""

Question

I have a problem with debugging my code. I'm getting java.lang.NumberFormatException: Invalid int: "" error at line 88 which is Calendar c = Calendar.getInstance();. I dont' understand how the Calendar instance can produce such error.

WakefulReceiverWorker.java:

    Calendar c = Calendar.getInstance();   // <----- line 88
    long newStart = c.getTimeInMillis() + 300000;
    AlarmManager mAlarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
    PendingIntent pendingIntent = PendingIntent.getBroadcast(this, randomInt, intent2,PendingIntent.FLAG_UPDATE_CURRENT);
    mAlarmManager.set(AlarmManager.RTC_WAKEUP, (newStart), pendingIntent);

logcat:

12-13 19:57:01.589    2070-2085/com.example.app W/System.err﹕ java.lang.NumberFormatException: Invalid int: ""
12-13 19:57:01.619    2070-2085/com.example.app W/System.err﹕ at java.lang.Integer.invalidInt(Integer.java:138)
12-13 19:57:01.629    2070-2085/com.example.app W/System.err﹕ at java.lang.Integer.parseInt(Integer.java:359)
12-13 19:57:01.639    2070-2085/com.example.app W/System.err﹕ at java.lang.Integer.parseInt(Integer.java:332)
12-13 19:57:01.639    2070-2085/com.example.app W/System.err﹕ at java.util.Calendar.getHwFirstDayOfWeek(Calendar.java:807)
12-13 19:57:01.639    2070-2085/com.example.app W/System.err﹕ at java.util.Calendar.<init>(Calendar.java:745)
12-13 19:57:01.639    2070-2085/com.example.app W/System.err﹕ at java.util.GregorianCalendar.<init>(GregorianCalendar.java:338)
12-13 19:57:01.649    2070-2085/com.example.app W/System.err﹕ at java.util.GregorianCalendar.<init>(GregorianCalendar.java:239)
12-13 19:57:01.649    2070-2085/com.example.app W/System.err﹕ at java.util.Calendar.getInstance(Calendar.java:1086)
12-13 19:57:01.649    2070-2085/com.example.app W/System.err﹕ at com.example.app.WakefulReceiverWorker.onHandleIntent(WakefulReceiverWorker.java:88)
12-13 19:57:01.659    2070-2085/com.example.app W/System.err﹕ at android.app.IntentService$ServiceHandler.handleMessage(IntentService.java:65)
12-13 19:57:01.659    2070-2085/com.example.app W/System.err﹕ at android.os.Handler.dispatchMessage(Handler.java:99)
12-13 19:57:01.659    2070-2085/com.example.app W/System.err﹕ at android.os.Looper.loop(Looper.java:137)
12-13 19:57:01.659    2070-2085/com.example.app W/System.err﹕ at android.os.HandlerThread.run(HandlerThread.java:60)

It's not another variable....it's an invalid date in the Calendar. — Elliott Frisch
– Elliott Frisch, Commented Dec 13, 2013 at 19:14
" Calendar c = Calendar.getInstance(); " are you sure that is line 88? — vivek
– vivek, Commented Dec 13, 2013 at 19:17
stackoverflow.com/questions/16936086/… Another similar issue. — peter.petrov
– peter.petrov, Commented Dec 13, 2013 at 19:21
Calendar.getHwFirstDayOfWeek isn't a standard java.util.Calendar method. It could be a Huawei implementation bug. Mobile device vendors sometiems override the Android Framework code to work with their specific hardware. Seems like every search for getHwFirstDayOfWeek is an Android Huawei device... — dstricks
– dstricks, Commented Dec 13, 2013 at 19:31

XorOrNor · Accepted Answer · 2013-12-14 17:31:19Z

3

I've just tested the app on the Samsung Galaxy S3 (i9300) and the error is not present on this device. It seems that it is Huawei's software problem.

answered Dec 14, 2013 at 17:31

XorOrNor

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David S. · Accepted Answer · 2013-12-13 19:22:02Z

0

Try this:

  Calendar calendar = new GregorianCalendar();

Not sure why yours isn't working, but Calendar is an Abstract class, so it might work better if you try GregorianCalendar.

edited Dec 13, 2013 at 19:22

answered Dec 13, 2013 at 19:15

David S.

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3 Comments

Saša Šijak Over a year ago

Calendar.getInstance() is not unsafe

XorOrNor Over a year ago

Doesn't change anything.

SergeyB Over a year ago

new GregorianCalendar() assumes your users use Gregorian Calendars, but not every country/region uses it.

SergeyB · Accepted Answer · 2013-12-13 19:55:36Z

0

Try instantiating your Calendar this way:

Locale locale = Locale.getDefault();
System.out.println("Locale is : [" + locale + "]"); // make sure there is a default Locale
Calendar calendar = Calendar.getInstance(locale);

----- Update ------
If you go through the stack trace, it looks like this is the culprit:

12-13 19:57:01.639    2070-2085/com.example.app W/System.err﹕ at java.util.Calendar.getHwFirstDayOfWeek(Calendar.java:807)

Because the next line in the stack trace starts parsing the integer, presumably the value returned by getHwFirstDayOfWeek().

edited Dec 13, 2013 at 19:55

answered Dec 13, 2013 at 19:43

SergeyB

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1 Comment

Melquiades Over a year ago

You changed variable name, otherwise the code is the same as OP's. How does that help?

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