Facebook Errors on itegrating facebook sdk in android app

I integrated facebook in my app. The errors i getting in in two cases:

1. when facebook.apk is installed in emulator. errors: A page comes up saying error code 100 invalid parameters and then if i again press ok button then my app getting force close with nullpointerexception.

2.when facebook.apk is not installed in emulator. errors: Although login page comes up but when i login getting Force close

Now i also try Example code come with facebook sdk. i put my appId in example app. Now while running the example app login occur after that when i click on post wall the post wall page comes up and suddenly app goes disappear No ERROR in logcat.

I am doing this because my app is identical to example app provided by facebook. (i copy paste the code from example app to my app).

Locat : 10-14 16:30:02.176: ERROR/AndroidRuntime(218): Uncaught handler: thread main

  exiting  due to uncaught exception
  10-14 16:30:02.226: ERROR/AndroidRuntime(218): java.lang.NullPointerException
  10-14 16:30:02.226: ERROR/AndroidRuntime(218):     at       com.android.myapp.MyActivity$SampleAuthListener.onAuthSucceed(MyActivity.java:280)
  10-14 16:30:02.226: ERROR/AndroidRuntime(218):     at     com.android.myapp.SessionEvents.onLoginSuccess(SessionEvents.java:78)
  10-14 16:30:02.226: ERROR/AndroidRuntime(218):     at com.android.myapp.LoginButton$LoginDialogListener.onComplete(LoginButton.jav开发者_如何学编程a:95)
  10-14 16:30:02.226: ERROR/AndroidRuntime(218):     at com.facebook.android.Facebook$1.onComplete(Facebook.java:308)
  10-14 16:30:02.226: ERROR/AndroidRuntime(218):     at com.facebook.android.FbDialog$FbWebViewClient.shouldOverrideUrlLoading(FbDialog.java:133)
  10-14 16:30:02.226: ERROR/AndroidRuntime(218):     at android.webkit.CallbackProxy.uiOverrideUrlLoading(CallbackProxy.java:193)
  10-14 16:30:02.226: ERROR/AndroidRuntime(218):     at android.webkit.CallbackProxy.handleMessage(CallbackProxy.java:304)
  10-14 16:30:02.226: ERROR/AndroidRuntime(218):     at android.os.Handler.dispatchMessage(Handler.java:99)
  10-14 16:30:02.226: ERROR/AndroidRuntime(218):     at android.os.Looper.loop(Looper.java:123)
  10-14 16:30:02.226: ERROR/AndroidRuntime(218):     at android.app.ActivityThread.main(ActivityThread.java:4363)
   10-14 16:30:02.226: ERROR/AndroidRuntime(218):     at java.lang.reflect.Method.invokeNative(Native Method)
  10-14 16:30:02.226: ERROR/AndroidRuntime(218):     at java.lang.reflect.Method.invoke(Method.java:521)
  10-14 16:30:02.226: ERROR/AndroidRuntime(218):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
  10-14 16:30:02.226: ERROR/AndroidRuntime(218):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
   10-14 16:30:02.226: ERROR/AndroidRuntime(218):     at dalvik.system.NativeStart.main(Native Method)

any help to solve this problem any suggestion are most welcome...

EDIT I tried with an another example similarly put my appId but same error is occurring this example is taken from here

* I think problem is not in the code but in the app page.*

EDIT NOTE I tried same application 20 or 25 days ago and it was working fine

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Seems that problem in the Code you are using. Better change you facebook code recommended by Facebook team :

You need to Download code from here : Facebook in Github.

Then check this page for Integrating Facebook in you App : Guide To Integrate you App in Android.

If you need to post on the user's wall check this link :

Post in Facebook wall without Dialog