java.text.ParseException：仅某些设备上的日期不可解析

Question

我面临一个非常奇怪的问题。解析此字符串时2016-09-06 05:18:06.023 PM，出现以下异常-java.text.ParseException: Unparseable date: "2016-09-06 05:18:06.023 PM" (at offset 24)

奇怪的是，发生此异常的设备是朋友的 Nexus 5 。但是，如果我在 Nexus 5 / 其他几个模拟器
上调试了相同的字符串，则可以正常工作。

这是我正在使用的代码。SimpleDateFormat属于java.text包。Date属于java.util包

    SimpleDateFormat formatGMT = new SimpleDateFormat("yyyy-MM-dd KK:mm:ss.SSS a");
    formatGMT.setTimeZone(TimeZone.getTimeZone("GMT"));
    try {
      date = formatGMT.parse("2016-09-06 05:18:06.023 PM");
     } catch (ParseException e) {
      Crashlytics.log(Log.ERROR, "DB Insertion error", e.getMessage().toString());
      Crashlytics.logException(e);
      e.printStackTrace();
     }

这是完整的堆栈跟踪。

  # Crashlytics - plaintext stacktrace  Wed, 07 Sep 2016 03:37:44 GMT


# Platform: android

# Bundle Identifier: com.mypackage.app
# Issue #: 306

# Date: 2016-09-06T17:18:04Z
# OS Version: 6.0.1
# Device: Nexus 5
# RAM Free: 36.5%
# Disk Free: 11%

#0. Crashed: pool-3-thread-3: 0 0 0x0000000000000000
       at java.text.DateFormat.parse(DateFormat.java:579)
       at com.mypackage.app.MyService$16$1.execute(MyService.java:1670)
       at io.realm.Realm$1.run(Realm.java:1187)
       at io.realm.internal.async.BgPriorityRunnable.run(BgPriorityRunnable.java:34)
       at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:423)
       at java.util.concurrent.FutureTask.run(FutureTask.java:237)
       at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
       at java.lang.Thread.run(Thread.java:818)

--

Non-fatal Exception: java.text.ParseException: Unparseable date: "2016-09-06 05:18:06.023 PM" (at offset 24)
       at java.text.DateFormat.parse(DateFormat.java:579)
       at com.mypackage.MyService$16$1.execute(MyService.java:1670)
       at io.realm.Realm$1.run(Realm.java:1187)
       at io.realm.internal.async.BgPriorityRunnable.run(BgPriorityRunnable.java:34)
       at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:423)
       at java.util.concurrent.FutureTask.run(FutureTask.java:237)
       at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
       at java.lang.Thread.run(Thread.java:818)

#0. Crashed: pool-3-thread-3: 0 0 0x0000000000000000
       at java.text.DateFormat.parse(DateFormat.java:579)
       at com.mypackage.MyService$16$1.execute(MyService.java:1670)
       at io.realm.Realm$1.run(Realm.java:1187)
       at io.realm.internal.async.BgPriorityRunnable.run(BgPriorityRunnable.java:34)
       at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:423)
       at java.util.concurrent.FutureTask.run(FutureTask.java:237)
       at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
       at java.lang.Thread.run(Thread.java:818)

Answer 1

设备默认语言环境中的am / pm符号可能会影响它，因此请尝试使用以下语言环境来解析日期，这将对您有所帮助。

   SimpleDateFormat formatGMT = new SimpleDateFormat("yyyy-MM-dd KK:mm:ss.SSS a", Locale.US);

      formatGMT.setTimeZone(TimeZone.getTimeZone("GMT"));

      try 
      {
             date = formatGMT.parse("2016-09-06 05:18:06.023 PM");
      } 
      catch (ParseException e)
      {
             Crashlytics.log(Log.ERROR, "DB Insertion error", e.getMessage().toString());
             Crashlytics.logException(e);
             e.printStackTrace();
      }