i tried play service. now, service running, ... adds notification on task bar. when task bar clicked, notification should call myactivity.class. gives error. please see code, after error, error:
... w/dalvikvm( 2384): threadid=1: thread exiting uncaught exception (group=0x4001d7e0) e/androidruntime( 2384): fatal exception: main e/androidruntime( 2384): java.lang.runtimeexception: unable start activity componentinfo{activity.change/activity.change.myactivity}: java.lang.nullpointerexception
....
code:
public void addnotification() { string ns = context.notification_service; notificationmanager mnotificationmanager = (notificationmanager) getsystemservice(ns); int icon = r.drawable.icon; //.drawable.notification_icon; charsequence tickertext = "hello"; long when = system.currenttimemillis(); notification notification = new notification(icon, tickertext, when); //notification.defaults=notification.flag_only_alert_once+notification.flag_auto_cancel; //notification.defaults=notification.flags notification.flags|=notification.flag_auto_cancel; context context = getapplicationcontext(); charsequence contenttitle = "uhs next"; charsequence contenttext = "hello world!"; intent notificationintent = new intent(this, class_b.class); // want call class_b, not a. has called "this" service though. pendingintent contentintent = pendingintent.getactivity(this, 0, notificationintent, 0); /* * pendingintent malarmsender = pendingintent.getservice(alarmservice.this, 0, new intent(alarmservice.this, alarmservice_service.class), 0); * */ notification.setlatesteventinfo(context, contenttitle, contenttext, contentintent); //private static final int hello_id = 1; << moved global declaration mnotificationmanager.notify(hello_id, notification); } // part of error log:
i/windowmanager( 90): ignoring home; event canceled. d/myservice( 5206): received message!! d/dalvikvm( 90): gc_external_alloc freed 22585 objects / 1120256 bytes in 79ms d/dalvikvm( 5206): gc_explicit freed 3702 objects / 224088 bytes in 77ms i/activitymanager( 90): starting activity: intent { act=android.intent.action.main cat=[android.intent.category.home] flg=0x10200000 cmp=com.android.launcher/com.android.launcher2.launcher } d/dalvikvm( 172): gc_explicit freed 36 objects / 1944 bytes in 91ms i/activitymanager( 90): starting activity: intent { cmp=activity.change/.w2pexampleandnew bnds=[0,387][480,483] } w/activitymanager( 90): startactivity called non-activity context; forcing intent.flag_activity_new_task for: intent { cmp=activity.change/.w2pexampleandnew bnds=[0,387][480,483] } v/renderscript_jni( 171): surfacedestroyed d/androidruntime( 5206): shutting down vm w/dalvikvm( 5206): threadid=1: thread exiting uncaught exception (group=0x4001d7e0) e/androidruntime( 5206): fatal exception: main e/androidruntime( 5206): java.lang.runtimeexception: unable start activity componentinfo {activity.change/activity.change.w2pexampleandnew}: java.lang.nullpointerexception e/androidruntime( 5206): @ android.app.activitythread.performlaunchactivity(activitythread.java:2663) e/androidruntime( 5206): @ android.app.activitythread.handlelaunchactivity(activitythread.java:2679) e/androidruntime( 5206): @ android.app.activitythread.access$2300(activitythread.java:125) e/androidruntime( 5206): @ android.app.activitythread$h.handlemessage(activitythread.java:2033) e/androidruntime( 5206): @ android.os.handler.dispatchmessage(handler.java:99) e/androidruntime( 5206): @ android.os.looper.loop(looper.java:123) e/androidruntime( 5206): @ android.app.activitythread.main(activitythread.java:4627) e/androidruntime( 5206): @ java.lang.reflect.method.invokenative(native method) e/androidruntime( 5206): @ java.lang.reflect.method.invoke(method.java:521) e/androidruntime( 5206): @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:858) e/androidruntime( 5206): @ com.android.internal.os.zygoteinit.main(zygoteinit.java:616) e/androidruntime( 5206): @ dalvik.system.nativestart.main(native method) e/androidruntime( 5206): caused by: java.lang.nullpointerexception e/androidruntime( 5206): @ activity.change.w2pexampleandnew.oncreate(w2pexampleandnew.java:63) e/androidruntime( 5206): @ android.app.instrumentation.callactivityoncreate(instrumentation.java:1047) e/androidruntime( 5206): @ android.app.activitythread.performlaunchactivity(activitythread.java:2627) e/androidruntime( 5206): ... 11 more w/activitymanager( 90): force finishing activity activity.change/.w2pexampleandnew w/activitymanager( 90): activity pause timeout historyrecord{44cafc20 activity.change/.w2pexampleandnew} v/renderscript_jni( 171): surfacecreated v/renderscript_jni( 171): surfacechanged d/wifiservice( 90): acquirewifilocklocked: wifilock{networklocationprovider type=2 binder=android.os.binder@44d28380} d/locationmasfclient( 90): getnetworklocation(): returning cache location accuracy 70.0 d/dalvikvm( 465): gc_for_malloc freed 6095 objects / 509112 bytes in 38ms w/activitymanager( 90): activity destroy timeout historyrecord{44cafc20 activity.change/.w2pexampleandnew} d/wifiservice( 90): releasewifilocklocked: wifilock{networklocationprovider type=2 binder=android.os.binder@44d28380} i/process ( 5206): sending signal. pid: 5206 sig: 9 w/inputmanagerservice( 90): window focused, ignoring focus gain of: com.android.internal.view.iinputmethodclient$stub$proxy@44d18b80 i/activitymanager( 90): process activity.change (pid 5206) has died. w/activitymanager( 90): scheduling restart of crashed service activity.change/.w2pandroidservice in 5000ms i/activitymanager( 90): start proc activity.change service activity.change/.w2pandroidservice: pid=5258 uid=10073 gids={1006, 1015, 3003} d/myservice( 5258): oncreate
make sure, have myactivity activity declared in androidmanifest.xml.
update
if myactivity main launcher activity (which starts service), , want start activity_b notification, both of these activities must declared in androidmanifest.xml (watch launchmode, if set any!):
<activity android:name="myactivity" android:label="@string/app_name"> <intent-filter> <action android:name="android.intent.action.main" /> <category android:name="android.intent.category.launcher" /> </intent-filter> </activity> <activity android:name="activity_b" /> also, intent when specifying notification should like:
intent notificationintent = new intent(this, activity_b.class); depr.
try setting getapplicationcontext() instead of this when creating pendingintent:
pendingintent contentintent = pendingintent.getactivity( getapplicationcontext(), 0, notificationintent, 0); 
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