Problem:
In the very first Facebook SDK tutorial, when I finish the final steps to get a MainActivity.java that looks like the tutorial, instead of getting the message "Hello
!" the app crashes and gives an error like "Could not find method android.support.v4.content.LocalBroadcastManager.getInstance, referenced from method com.facebook.Session.postActiveSessionAction", then followed by a bunch of exceptions, starting with "java.lang.NoClassDefFoundError: android.support.v4.content.LocalBroadcastManager".
My code looks exactly like the tutorial found at https://developers.facebook.com/docs/android/getting-started/facebook-sdk-for-android/. (For reference, the tutorial code as of September 6, 2013 is below, as it could be revised by now:)
package com.firstandroidapp;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.widget.TextView;
import com.facebook.*;
import com.facebook.model.*;
public class MainActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// start Facebook Login
Session.openActiveSession(this, true, new Session.StatusCallback() {
// callback when session changes state
@Override
public void call(Session session, SessionState state, Exception exception) {
if (session.isOpened()) {
// make request to the /me API
Request.executeMeRequestAsync(session, new Request.GraphUserCallback() {
// callback after Graph API response with user object
@Override
public void onCompleted(GraphUser user, Response response) {
if (user != null) {
TextView welcome = (TextView) findViewById(R.id.welcome);
welcome.setText("Hello " + user.getName() + "!");
}
}
});
}
}
});
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
Session.getActiveSession().onActivityResult(this, requestCode, resultCode, data);
}
}
Please Note First:
This problem and its workaround appears to be version specific. Your mileage may vary if the error isn't exactly the same as the one encountered. The versions of things used when this error was encountered were Android ADT v22, facebook-android-SDK-3.5, with a build target set to Android 4.2.2. All source code, tool, etc., were unmodified from the versions downloaded from Google and Facebook. This problem was worked around September 6, 2013, so hopefully someone from Facebook or Google's Android team has already made the appropriate fixes (making this post no longer needed =p).
Workaround:
This problem is caused by a missing method that the Facebook SDK is expecting to find in android.support.v4, but cannot find in the current version of the Android libraries. A hint to this is a strange error (which you may or may not have seen when importing the Facebook SDK demos into Eclipse) mentions that the versions of android.support.v4 do not match. The demos seem to run properly when compiled, however the very first Facebook SDK program you write yourself does not.
To work around this problem, the Facebook SDK version 3.5 includes a jar file you need to link to your project, located in "/path/to/facebook-android-sdk-3.5/libs/android-support-v4.jar".
One way to do this is as follows:
- Go to your project's properties in Eclipse, then go to "Java Build Path"
- Click on the "Libraries" tab
- Click on either "Add JARs..." or "Add External JARs...", depending on which of the two you'd like to do
- Add the android-support-v4.jar that comes with the Facebook Android SDK v3.5
- Click on the "Order and Export" tab
- Check the newly-imported android-support-v4.jar
- Clean the project (Project->Clean...) (this step is important as attempting to re-run the project without cleaning it first or altering its code will simply run the existing binary again, which will give the error once more)
Additional Notes:
There's also another change in the tutorial which you may want to make. The function "Request.executeMeRequestAsync(session, new Request.GraphUserCallback() {....});" is deprecated in the v3.5 SDK. You can get rid of the "deprecated method" warning in Eclipse by changing the above code to "Request.newMeRequest(session, new Request.GraphUserCallback() {...}).executeAsync();".
Hopefully this post helped someone out there. I realize it's a pretty basic problem to debug for experienced coders, but I decided to post this anyway in case it came in handy.
