[Android] Error calling method on NPObject

[BarryDam]

Hello!

I'm running the plugin on Android 4.2.2 with Cordova 2.7

After following each step of your (and Facebooks) readme I started the Simple example.

When I pressed Login the following error occurd:

Uncaught Error: Error calling method on NPObject. at file://android_asset/www/cordova-2.7.0.js:857

SOLUTION :

Right click on the FacebookSDK project - go on the java build path and check android-support-v4.jar (somehow this was unchecked on mine after an android sdk update... )

then just go on Project > clean and rerun the application :)

[bradyemerson]

I am receiving the same error when calling FB.login() on Android 4.2.2 with Cordova 2.8.

Uncaught Error: Error calling method on NPObject. at file:///android_asset/www/js/cordova-2.8.0.js:863

I've tried the solution you suggested and other FB.xxxx functions work, just not login().

[radu-ciobanu]

I'm getting the same error too. Any solutions?

[bradyemerson]

Actually yes, just figured it out. VyseExhale's solution is correct I just misinterpreted it.

FacebookSDK Project -> Properties -> Java Build Path -> Order and Export (tab) -> Make sure android-support-v4.jar is checked. Then do a clean.

[radu-ciobanu]

Yeap, worked for me also. Thanks!
Now I have another issue. I'm not able the get the session working. FB.init response is null all the time. Any guesses?

[BarryDam]

Have you configured your key hashes correctely @ your FB app?

AND .. on some (older) android versions, I had to whitelist all facebook domains in the config.xml:
<access origin="http://facebook.com" subdomains="true" /> <access origin="https://facebook.com" subdomains="true" /> <access origin="https://*.facebook.com" /> <access origin="http://*.facebook.com" /> <access origin="http://mymondrian.com" subdomains="true" /> <access origin="https://m.facebook.com" subdomains="true" /> <access origin="https://graph.facebook.com" subdomains="true" /> <access origin="https://api.facebook.com" subdomains="true" /> <access origin="https://*.fbcdn.net" subdomains="true" /> <access origin="https://*.akamaihd.net" subdomains="true" />

only <access origin=".*"/> wasn't enough

[bradyemerson]

Yes, it sounds like you have not configured the hash for your app in Facebook. You can generate it using keytool or add this snippet to the main activity:

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    // Add code to print out the key hash
try {
    PackageInfo info = getPackageManager().getPackageInfo(
            "com.facebook.samples.hellofacebook", 
            PackageManager.GET_SIGNATURES);
    for (Signature signature : info.signatures) {
        MessageDigest md = MessageDigest.getInstance("SHA");
        md.update(signature.toByteArray());
        Log.d("KeyHash:", Base64.encodeToString(md.digest(), Base64.DEFAULT));
        }
} catch (NameNotFoundException e) {

} catch (NoSuchAlgorithmException e) {

}

For more info, see Step 4: https://developers.facebook.com/docs/getting-started/facebook-sdk-for-android/3.0/

[aogilvie]

Closing. Out-of-date.