Android Facebook api 3.0 error: Cannot call LoginActivity with a null calling package

Question

I am trying to integrate an android app with the the new facebook 3.0 api, but I get this exception:

java.lang.RuntimeException: Unable to resume activity {dk.imu.konnekt/com.facebook.LoginActivity}: com.facebook.FacebookException: Cannot call LoginActivity with a null calling package. This can occur if the launchMode of the caller is singleInstance.

I have search for this error but no one else seems to have had any troble with it. I guess it is because I am using a TabHost and TabsGroupActivities for each tab. But I have no clue on how to solve it.

I have added the relevant code here:

public class MainTabActivity extends TabActivity {    
    public void onCreate(Bundle savedInstanteState){
        super.onCreate(savedInstanteState);
        setContentView(R.layout.tab_layout);
        TabHost tabHost = getTabHost();

        View shareTab = getLayoutInflater().inflate(R.layout.share_tab, null);
        tabHost.addTab(tabHost.newTabSpec("Share").setIndicator(shareTab)
        .setContent(new Intent(MainTabActivity.this, ShareGroupActivity.class)));

        ...
    }
}

-

public class ShareGroupActivity extends TabsGroupActivity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        startChildActivity("ShareActivity", new Intent(this, ShareActivity.class));
    }
}

-

public class ShareActivity extends BaseActivity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.share);

        testFacebookConnection();
    }

    public void testFacebookConnection(){
        Session session = new Session(this);
        Session.setActiveSession(session);
        SessionState state = session.getState();

        Settings.addLoggingBehavior(LoggingBehavior.INCLUDE_ACCESS_TOKENS);

        Session.StatusCallback statusCallback = 
            new Session.StatusCallback() {
            @Override
            public void call(Session session, SessionState state, Exception exception) {
                Toast.makeText(ShareActivity.this, "Facebook session status changed", Toast.LENGTH_SHORT).show(); 
            }
        };

        if (!session.isOpened() && !session.isClosed() && session.getState() != SessionState.OPENING) {
            OpenRequest open = new OpenRequest(this).setCallback(statusCallback);
            List<String> permission = new ArrayList<String>();
            permission.add("publish_actions");
            open.setPermissions(permission);
            session.openForPublish(open);
        } else {
            Session.openActiveSession(this, true, statusCallback);
        }
    }   

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        Session.getActiveSession().onActivityResult(this, requestCode, resultCode, data);
    }
}

Any clue on how to solve it?

Update 1 stack trace:

FATAL EXCEPTION: main java.lang.RuntimeException: Unable to resume activity {dk.imu.konnekt/com.facebook.LoginActivity}: com.facebook.FacebookException: Cannot call LoginActivity with a null calling package. This can occur if the launchMode of the caller is singleInstance. at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2812) at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2851) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2234) at android.app.ActivityThread.access$600(ActivityThread.java:139) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1261) at android.os.Handler.dispatchMessage(Handler.java:99) android.os.Looper.loop(Looper.java:154) at android.app.ActivityThread.main(ActivityThread.java:4945) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:511) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) at dalvik.system.NativeStart.main(Native Method) Caused by: com.facebook.FacebookException: Cannot call LoginActivity with a null calling package. This can occur if the launchMode of the caller is singleInstance. at com.facebook.LoginActivity.onResume(LoginActivity.java:110) at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1236) at android.app.Activity.performResume(Activity.java:4613) at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2796) ... 12 more

Update 2: I looked through the code and found the implementation of startChildActivity:

public void startChildActivity(String Id, Intent intent) {     
   Window window = getLocalActivityManager().startActivity(Id,intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP));
   if (window != null) {
       mIdList.add(Id);
       setContentView(window.getDecorView()); 
   }    
}

It uses the flag FLAG_ACTIVITY_CLEAR_TOP. I tried to remove it, but no change in the outcome.

Update 3:

https://github.com/facebook/facebook-android-sdk/blob/master/facebook/src/com/facebook/LoginActivity.java

The Facebook code uses

callingPackage = getCallingPackage();

and

if (callingPackage == null) {
       throw new FacebookException(NULL_CALLING_PKG_ERROR_MSG);
}

http://developer.android.com/reference/android/app/Activity.html#getCallingPackage()

This method has a note:

If the calling activity is not expecting a result (that is it did not use the startActivityForResult(Intent, int) form that includes a request code), then the calling package will be null.

In the method startChildActivity I use the getLocalActivityManager().startActivity, in TabsGroupActivity that extends ActivityGroup, to handle tab activities. http://developer.android.com/reference/android/app/LocalActivityManager.html#startActivity(java.lang.String, android.content.Intent)

This method does not what the notes says. It does not expect a result and does not use the startActivityForResult method. The method also ensures something similar to singleinstance launchmode. How should I change this method implementation, so it can work with facebook?

Answer 1

I managed to find my problem. Although I wasn't setting

android:launchMode="singleTask"

my LoginActivity had

android:noHistory="true"

which results in that exception. I put noHistory true because I didn't want the user to be able to press back button on the first activity after login and go back to login screen. Now I need to find another solution.