If you are not wanting to return info to Activity A from Activity B, just use startActivity() in Activity A instead of startActivityForResult().
If you use startActivityForResult() to launch Activity B from Activity A, Activity A expects Activity B to send information back when it closes. You'd use something like this if you wanted to send information back from Activity B to Activity A after calling startActivityForResult() from Activity A. Intent iReturn = new Intent(); iReturn.putExtra( "someKey", someValue ); setResult( RESULT_OK, iReturn ); finish(); But again, if you aren't wanting a return, use startActivity() to start Activity B. Steven Studio LFP http://www.studio-lfp.com On Saturday, October 22, 2011 10:35:43 AM UTC-5, ndiiie90 wrote: > > hmm not really.. > > actually the error is only about when i press back button from > activity B, it returns to activity A (where i implement the facebook > sdk) but the facebook sdk returns error about nullPointerException > since the startActivityForResult has no data for it parameters. > how can i solve this? > > > On Oct 22, 10:01 pm, Studio LFP <studi...@gmail.com> wrote: > > It looks like you are starting Activity B with startActivityForResult. > Are > > you trying to receive some information back into Activity A from Activity > B? > > > > If not, you just want to use startActivity instead. > > > > Steven > > Studio LFPhttp://www.studio-lfp.com > > > > > > > > > > > > > > > > On Saturday, October 22, 2011 9:36:10 AM UTC-5, ndiiie90 wrote: > > > > > Hi guys, > > > > > i implement facebook sdk in my app and just follow the tutorial. > > > When i call other activity, let's say: > > > the activity that i implement facebook sdk is activity A, from there i > can > > > call other activity which is B. > > > From B, i press back button, then it goes back to A. But it returns > error: > > > > > > ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- > > > > > 10-22 21:33:23.445: ERROR/AndroidRuntime(538): FATAL EXCEPTION: main > > > 10-22 21:33:23.445: ERROR/AndroidRuntime(538): > java.lang.RuntimeException: > > > Failure delivering result ResultInfo{who=null, request=0, result=0, > > > data=null} to activity {pt.bm.vv/test.test.Test}: > > > java.lang.NullPointerException > > > 10-22 21:33:23.445: ERROR/AndroidRuntime(538): at > > > android.app.ActivityThread.deliverResults(ActivityThread.java:3515) > > > 10-22 21:33:23.445: ERROR/AndroidRuntime(538): at > > > android.app.ActivityThread.handleSendResult(ActivityThread.java:3557) > > > 10-22 21:33:23.445: ERROR/AndroidRuntime(538): at > > > android.app.ActivityThread.access$2800(ActivityThread.java:125) > > > 10-22 21:33:23.445: ERROR/AndroidRuntime(538): at > > > android.app.ActivityThread$H.handleMessage(ActivityThread.java:2063) > > > 10-22 21:33:23.445: ERROR/AndroidRuntime(538): at > > > android.os.Handler.dispatchMessage(Handler.java:99) > > > 10-22 21:33:23.445: ERROR/AndroidRuntime(538): at > > > android.os.Looper.loop(Looper.java:123) > > > 10-22 21:33:23.445: ERROR/AndroidRuntime(538): at > > > android.app.ActivityThread.main(ActivityThread.java:4627) > > > 10-22 21:33:23.445: ERROR/AndroidRuntime(538): at > > > java.lang.reflect.Method.invokeNative(Native Method) > > > 10-22 21:33:23.445: ERROR/AndroidRuntime(538): at > > > java.lang.reflect.Method.invoke(Method.java:521) > > > 10-22 21:33:23.445: ERROR/AndroidRuntime(538): at > > > > com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) > > > > > 10-22 21:33:23.445: ERROR/AndroidRuntime(538): at > > > com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) > > > 10-22 21:33:23.445: ERROR/AndroidRuntime(538): at > > > dalvik.system.NativeStart.main(Native Method) > > > 10-22 21:33:23.445: ERROR/AndroidRuntime(538): Caused by: > > > java.lang.NullPointerException > > > 10-22 21:33:23.445: ERROR/AndroidRuntime(538): at > > > test.test.Test.onActivityResult(Test.java:507) > > > 10-22 21:33:23.445: ERROR/AndroidRuntime(538): at > > > android.app.Activity.dispatchActivityResult(Activity.java:3890) > > > 10-22 21:33:23.445: ERROR/AndroidRuntime(538): at > > > android.app.ActivityThread.deliverResults(ActivityThread.java:3511) > > > 10-22 21:33:23.445: ERROR/AndroidRuntime(538): ... 11 more > > > > > > ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- > > > > > > > Anyone has idea to solve this problem? > > > > > Thanks -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
