不幸的是 AppName 的具体问题已停止 - NullPointerException

Question

我在运行 Urban Airship 推送通知的 PhoneGap 应用程序时遇到问题。一切正常，除非使用 Android 的本机任务杀手（关闭应用程序）关闭应用程序。当手机闲置 30 秒到一分钟时，我收到错误消息，“不幸的是，[应用程序] 已停止”。我正在查看 LogCat，发生此错误时出现以下错误：

03-04 10:16:30.420: E/EmbeddedLogger(595): App crashed! Process: com.appname.pacakagename
03-04 10:16:30.420: E/EmbeddedLogger(595): App crashed! Package: com.appname.pacakagename v1 (1.1.2)
03-04 10:16:30.420: E/AndroidRuntime(10257): FATAL EXCEPTION: main
03-04 10:16:30.420: E/AndroidRuntime(10257): java.lang.ExceptionInInitializerError
03-04 10:16:30.420: E/AndroidRuntime(10257):    at java.lang.Class.newInstanceImpl(Native Method)
03-04 10:16:30.420: E/AndroidRuntime(10257):    at java.lang.Class.newInstance(Class.java:1130)
03-04 10:16:30.420: E/AndroidRuntime(10257):    at android.app.ActivityThread.handleCreateService(ActivityThread.java:2909)
03-04 10:16:30.420: E/AndroidRuntime(10257):    at android.app.ActivityThread.access$1600(ActivityThread.java:162)
03-04 10:16:30.420: E/AndroidRuntime(10257):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1504)
03-04 10:16:30.420: E/AndroidRuntime(10257):    at android.os.Handler.dispatchMessage(Handler.java:99)
03-04 10:16:30.420: E/AndroidRuntime(10257):    at android.os.Looper.loop(Looper.java:158)
03-04 10:16:30.420: E/AndroidRuntime(10257):    at android.app.ActivityThread.main(ActivityThread.java:5789)
03-04 10:16:30.420: E/AndroidRuntime(10257):    at java.lang.reflect.Method.invokeNative(Native Method)
03-04 10:16:30.420: E/AndroidRuntime(10257):    at java.lang.reflect.Method.invoke(Method.java:525)
03-04 10:16:30.420: E/AndroidRuntime(10257):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1027)
03-04 10:16:30.420: E/AndroidRuntime(10257):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:843)
03-04 10:16:30.420: E/AndroidRuntime(10257):    at dalvik.system.NativeStart.main(Native Method)
03-04 10:16:30.420: E/AndroidRuntime(10257): Caused by: java.lang.NullPointerException
03-04 10:16:30.420: E/AndroidRuntime(10257):    at com.urbanairship.Preferences.migratePreferencesFromFileToDb(Preferences.java:173)
03-04 10:16:30.420: E/AndroidRuntime(10257):    at com.urbanairship.analytics.AnalyticsPreferences.<init>(AnalyticsPreferences.java:32)
03-04 10:16:30.420: E/AndroidRuntime(10257):    at com.urbanairship.analytics.EventService.<clinit>(EventService.java:58)
03-04 10:16:30.420: E/AndroidRuntime(10257):    ... 13 more
03-04 10:16:30.430: W/asset(595): Copying FileAsset 0x7860b3b0 (zip:/data/app/com.appname.pacakagename-2.apk:/resources.arsc) to buffer size 200924 to make it aligned.
03-04 10:16:30.430: E/EmbeddedLogger(595): Application Label: appname

所以从这里我可以看到以下几行：

03-04 10:16:30.420: E/AndroidRuntime(10257): Caused by: java.lang.NullPointerException
03-04 10:16:30.420: E/AndroidRuntime(10257):    at com.urbanairship.Preferences.migratePreferencesFromFileToDb(Preferences.java:173)

我不确定在哪里调试该错误，我运行了这个：

find ./ -type f -name *Preferences*

但我找不到任何名为 Preferences.java 的文件。

这里指的插件是：

https://github.com/urbanairship/phonegap-ua-push

Android 源代码在这里：

https://github.com/urbanairship/phonegap-ua-push/tree/master/src/android

Answer 1

通过升级到最新版本的 Urban Airship 插件和我的 PhoneGap 版本解决了这个问题。