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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)
362
The NumberFormatException is an unchecked exception in Java that occurs when an attempt is made to convert a string with an incorrect format to a numeric value. Therefore, this exception is thrown when it is not possible to convert a string to a numeric type (e.g. int, float).
NumberFormatException: For input string: "null" is specifically saying that the String you receive for parsing is not numeric and it's true, "null" is not numeric. Many Java methods which convert String to numeric type like Integer. parseInt() which convert String to int, Double.
To handle this exception, try–catch block can be used. While operating upon strings, there are times when we need to convert a number represented as a string into an integer type. The method generally used to convert String to Integer in Java is parseInt().
If you provide the input string like "1.0" and you try to convert this string into an integer value, it will throw a NumberFormatException exception. Example- Integer. parseInt("1.. 0");
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.
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