Error on application ID of facebook app in Manifest

Question

Here is a little detail about my app. I have a tab layout using Fragments and a ViewPager. On the third tab, I have a Google Map V2. Now, whenever the user of the app would be in a certain landmark, he can share the details about that landmark on facebook. I have successfully created the map, but the details about landmarks are yet to be done. Now about the "share" function of facebook, I have followed the steps on facebook developers. When I run the app, I get the error:

10-17 14:19:06.856: E/AndroidRuntime(2180): java.lang.NullPointerException: Argument 'applicationId' cannot be null

And after searching, I found out that I need to put the application ID on the manifest.xml.

Here is my meta-data:

    <meta-data
        android:name="com.google.android.maps.v2.API_KEY"
        android:value="the key from google api console"

         />
    <meta-data
        android:name="com.facebook.sdk.ApplicationId"
        android:value="the key from fb devs"

        />

However, I still get the error:

10-17 14:44:03.076: E/AndroidRuntime(2240): java.lang.NullPointerException: Argument 'applicationId' cannot be null

The whole facebook share dialog is located in a Fragment.

Here it is:

TabFour.java

public class TabFour extends Fragment {
private UiLifecycleHelper uiHelper;
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.activity_tab_four, container, false);

    return rootView;
}

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    uiHelper = new UiLifecycleHelper(getActivity(), callback);
    uiHelper.onCreate(savedInstanceState);

    OpenGraphAction action = GraphObject.Factory.create(OpenGraphAction.class);
    action.setProperty("book", "https://example.com/book/Snow-Crash.html");

    @SuppressWarnings("deprecation")
    FacebookDialog shareDialog = new FacebookDialog.OpenGraphActionDialogBuilder(getActivity(), action, "books.reads", "book")
            .build();
    uiHelper.trackPendingDialogCall(shareDialog.present());
}


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

    uiHelper.onActivityResult(requestCode, resultCode, data, new FacebookDialog.Callback() {
        @Override
        public void onError(FacebookDialog.PendingCall pendingCall, Exception error, Bundle data) {
            Log.e("Activity", String.format("Error: %s", error.toString()));
        }

        @Override
        public void onComplete(FacebookDialog.PendingCall pendingCall, Bundle data) {
            Log.i("Activity", "Success!");
        }
    });
}



@Override
public void onResume() {
    super.onResume();
    uiHelper.onResume();
}

@Override
public void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    uiHelper.onSaveInstanceState(outState);
}

@Override
public void onPause() {
    super.onPause();
    uiHelper.onPause();
}

@Override
public void onDestroy() {
    super.onDestroy();
    uiHelper.onDestroy();
}
private Session.StatusCallback callback = new Session.StatusCallback() {


    @Override
    public void call(Session session, SessionState state,
            Exception exception) {
        // TODO Auto-generated method stub

    }
};

}

Here is my logcat.

Answer 1

You cannot put the appID directly into the manifest itself, you need to reference a string resource in the manifest. Something like:

In your AndroidManifest:

<meta-data android:name="com.facebook.sdk.ApplicationId" android:value="@string/app_id"/>

In your strings.xml

<resources>
  ...
  <string name="app_id">$app_id_here</string>
</resources>