android - Nullpointer exception while launching an activity from activitygroup -


i trying launch activity activitygroup. following code use:

public void replacecontentview() {     intent = new intent(summarycostscreen.this,permissionsscreen.class);     view view = getlocalactivitymanager().startactivity("activity9",i.addflags(intent.flag_activity_clear_top)).getdecorview();     this.setcontentview(view);     }

i nullpointer exception shown:

05-15 09:49:23.367: d/androidruntime(3872): shutting down vm 05-15 09:49:23.367: w/dalvikvm(3872): threadid=1: thread exiting uncaught exception (group=0x40b1a1f8) 05-15 09:49:23.382: e/androidruntime(3872): fatal exception: main 05-15 09:49:23.382: e/androidruntime(3872): java.lang.runtimeexception: unable start activity componentinfo{com.nykkos.personalize/com.nykkos.personalize.launcher.screens.permissionsscreen}: java.lang.nullpointerexception 05-15 09:49:23.382: e/androidruntime(3872):     @ android.app.activitythread.performlaunchactivity(activitythread.java:1964) 05-15 09:49:23.382: e/androidruntime(3872):     @ android.app.activitythread.startactivitynow(activitythread.java:1799) 05-15 09:49:23.382: e/androidruntime(3872):     @ android.app.localactivitymanager.movetostate(localactivitymanager.java:135) 05-15 09:49:23.382: e/androidruntime(3872):     @ android.app.localactivitymanager.startactivity(localactivitymanager.java:347) 05-15 09:49:23.382: e/androidruntime(3872):     @ com.nykkos.personalize.launcher.screens.summarycostscreen.replacecontentview(summarycostscreen.java:255) 05-15 09:49:23.382: e/androidruntime(3872):     @ com.nykkos.personalize.launcher.screens.summarycostscreen.onclick(summarycostscreen.java:116) 05-15 09:49:23.382: e/androidruntime(3872):     @ android.view.view.performclick(view.java:3480) 05-15 09:49:23.382: e/androidruntime(3872):     @ android.view.view$performclick.run(view.java:13993) 05-15 09:49:23.382: e/androidruntime(3872):     @ android.os.handler.handlecallback(handler.java:605) 05-15 09:49:23.382: e/androidruntime(3872):     @ android.os.handler.dispatchmessage(handler.java:92) 05-15 09:49:23.382: e/androidruntime(3872):     @ android.os.looper.loop(looper.java:137) 05-15 09:49:23.382: e/androidruntime(3872):     @ android.app.activitythread.main(activitythread.java:4368) 05-15 09:49:23.382: e/androidruntime(3872):     @ java.lang.reflect.method.invokenative(native method) 05-15 09:49:23.382: e/androidruntime(3872):     @ java.lang.reflect.method.invoke(method.java:511) 05-15 09:49:23.382: e/androidruntime(3872):     @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:784) 05-15 09:49:23.382: e/androidruntime(3872):     @ com.android.internal.os.zygoteinit.main(zygoteinit.java:551) 05-15 09:49:23.382: e/androidruntime(3872):     @ dalvik.system.nativestart.main(native method) 05-15 09:49:23.382: e/androidruntime(3872): caused by: java.lang.nullpointerexception 05-15 09:49:23.382: e/androidruntime(3872):     @ com.nykkos.personalize.launcher.screens.permissionsscreen.oncreate(permissionsscreen.java:48) 05-15 09:49:23.382: e/androidruntime(3872):     @ android.app.activity.performcreate(activity.java:4465) 05-15 09:49:23.382: e/androidruntime(3872):     @ android.app.instrumentation.callactivityoncreate(instrumentation.java:1049) 05-15 09:49:23.382: e/androidruntime(3872):     @ android.app.activitythread.performlaunchactivity(activitythread.java:1928) 05-15 09:49:23.382: e/androidruntime(3872):     ... 16 more

nullpointer thrown from

getlocalactivitymanager().startactivity("activity9",i.addflags(intent.flag_activity_clear_top)).getdecorview();

what can reason nullpointer, though cannot see obvious reasons this.

any appreciated.

from can see logcat description there exception in permissionsscreen class's oncreate() method in line number 48.


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