Crash Reported on Google Play: java.lang.NullPointerException

[Stefan Hammer]

java.lang.RuntimeException: Unable to start activity ComponentInfo{org.tomdroid/org.tomdroid.ui.CompareNotes}: java.lang.NullPointerException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1830)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1851)
at android.app.ActivityThread.access$1500(ActivityThread.java:132)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1038)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:150)
at android.app.ActivityThread.main(ActivityThread.java:4277)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at org.tomdroid.sync.SyncService.addPushable(SyncService.java:592)
at org.tomdroid.ui.CompareNotes.pushNote(CompareNotes.java:492)
at org.tomdroid.ui.CompareNotes.onCreate(CompareNotes.java:206)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1072)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1794)
... 11 more

[Stefan Hammer (j-4-deactivatedaccount)]

It seems that this user put the app to the background with CompareNotes showing. When it was brought to the front again, SyncService was already destroyed leading to NullPointer.

[Stefan Hammer (j-4-deactivatedaccount)]

I can reporduce this:
*) Trigger a conflict to get the conflict dialog
*) Go to launcher and then wait for long time (or swipe app away in taskswitcher overview)
*) Start tomdroid and sync

12-27 22:39:56.835: E/AndroidRuntime(7362): FATAL EXCEPTION: main
12-27 22:39:56.835: E/AndroidRuntime(7362): Process: org.tomdroid, PID: 7362
12-27 22:39:56.835: E/AndroidRuntime(7362): java.lang.RuntimeException: Unable to start activity ComponentInfo{org.tomdroid/org.tomdroid.ui.CompareNotes}: java.lang.NullPointerException
12-27 22:39:56.835: E/AndroidRuntime(7362): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2195)
12-27 22:39:56.835: E/AndroidRuntime(7362): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
12-27 22:39:56.835: E/AndroidRuntime(7362): at android.app.ActivityThread.access$800(ActivityThread.java:135)
12-27 22:39:56.835: E/AndroidRuntime(7362): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
12-27 22:39:56.835: E/AndroidRuntime(7362): at android.os.Handler.dispatchMessage(Handler.java:102)
12-27 22:39:56.835: E/AndroidRuntime(7362): at android.os.Looper.loop(Looper.java:136)
12-27 22:39:56.835: E/AndroidRuntime(7362): at android.app.ActivityThread.main(ActivityThread.java:5017)
12-27 22:39:56.835: E/AndroidRuntime(7362): at java.lang.reflect.Method.invokeNative(Native Method)
12-27 22:39:56.835: E/AndroidRuntime(7362): at java.lang.reflect.Method.invoke(Method.java:515)
12-27 22:39:56.835: E/AndroidRuntime(7362): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
12-27 22:39:56.835: E/AndroidRuntime(7362): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
12-27 22:39:56.835: E/AndroidRuntime(7362): at dalvik.system.NativeStart.main(Native Method)
12-27 22:39:56.835: E/AndroidRuntime(7362): Caused by: java.lang.NullPointerException
12-27 22:39:56.835: E/AndroidRuntime(7362): at org.tomdroid.sync.SyncService.addPushable(SyncService.java:592)
12-27 22:39:56.835: E/AndroidRuntime(7362): at org.tomdroid.ui.CompareNotes.pushNote(CompareNotes.java:498)
12-27 22:39:56.835: E/AndroidRuntime(7362): at org.tomdroid.ui.CompareNotes.onCreate(CompareNotes.java:205)
12-27 22:39:56.835: E/AndroidRuntime(7362): at android.app.Activity.performCreate(Activity.java:5231)
12-27 22:39:56.835: E/AndroidRuntime(7362): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
12-27 22:39:56.835: E/AndroidRuntime(7362): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2159)
12-27 22:39:56.835: E/AndroidRuntime(7362): ... 11 more

[Stefan Hammer (j-4-deactivatedaccount)]

SyncService is now a Service and therefore underlies the Android Lifecycle.
http://developer.android.com/reference/android/app/Service.html

[Stefan Hammer (j-4-deactivatedaccount)]

Another report with add pullable

java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.util.ArrayList.add(java.lang.Object)' on a null object reference
at org.tomdroid.sync.SyncService.addPullable(SyncService.java:588)
at org.tomdroid.ui.CompareNotes.pullNote(CompareNotes.java:484)
at org.tomdroid.ui.CompareNotes.onChooseNote(CompareNotes.java:451)
at org.tomdroid.ui.CompareNotes$4.onClick(CompareNotes.java:328)
at android.view.View.performClick(View.java:4438)
at android.view.View$PerformClick.run(View.java:18422)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5017)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)