When app is closed, and the service is running, app unable to show notification

[dyan02]

Hi, after i upgrade to 4.0.0, when the app is closed, and it calling service for every 15 min, everytime it calls Ti.Android.NotificationManager.notify(1, notification);

the error will appear

[WARN] :   W/System.err: java.lang.NullPointerException
[WARN] :   W/System.err:    at android.app.Notification$Builder.applyStandardTemplate(Notification.java:2039)
[WARN] :   W/System.err:    at android.app.Notification$Builder.makeContentView(Notification.java:2181)
[WARN] :   W/System.err:    at android.app.Notification$Builder.buildUnstyled(Notification.java:2229)
[WARN] :   W/System.err:    at android.app.Notification$Builder.build(Notification.java:2310)
[WARN] :   W/System.err:    at android.support.v4.app.NotificationCompatKitKat$Builder.build(NotificationCompatKitKat.java:114)
[WARN] :   W/System.err:    at android.support.v4.app.NotificationCompat$NotificationCompatImplKitKat.build(NotificationCompat.java:649)
[WARN] :   W/System.err:    at android.support.v4.app.NotificationCompat$Builder.build(NotificationCompat.java:1532)
[WARN] :   W/System.err:    at ti.modules.titanium.android.notificationmanager.NotificationProxy.buildNotification(NotificationProxy.java:315)
[WARN] :   W/System.err:    at ti.modules.titanium.android.notificationmanager.NotificationManagerModule.notify(NotificationManagerModule.java:78)
[WARN] :   W/System.err:    at org.appcelerator.kroll.runtime.v8.V8Runtime.nativeRunModule(Native Method)
[WARN] :   W/System.err:    at org.appcelerator.kroll.runtime.v8.V8Runtime.doRunModule(V8Runtime.java:177)
[WARN] :   W/System.err:    at org.appcelerator.kroll.KrollRuntime.handleMessage(KrollRuntime.java:299)
[WARN] :   W/System.err:    at org.appcelerator.kroll.runtime.v8.V8Runtime.handleMessage(V8Runtime.java:203)
[WARN] :   W/System.err:    at android.os.Handler.dispatchMessage(Handler.java:98)
[WARN] :   W/System.err:    at android.os.Looper.loop(Looper.java:136)
[WARN] :   W/System.err:    at org.appcelerator.kroll.KrollRuntime$KrollRuntimeThread.run(KrollRuntime.java:112)
[WARN] :   TiExceptionHandler: (main) [272,259562] Activity is null or already finishing, skipping dialog.

any idea to fix this?