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POFacebook Dialog Tutorial - Is Something Missing?
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  1. POFacebook Dialog Tutorial - Is Something Missing?
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    copied!<p>This is code from the following page: <a href="https://developers.facebook.com/docs/android/share-dialog/#setup" rel="nofollow">https://developers.facebook.com/docs/android/share-dialog/#setup</a></p> <p>I'm trying to get this to work but am extremely confused with the "callback" argument when instantiating the UILifecycleHelper class. (Looking at the tutorial code) I dont see where this variable is coming from. Ive attempted to create a null object and pass it, but (surprise) got a NullPointerException.</p> <p>Has Facebook forgot a step here or is it there some impicit knowledge from which my lack of understanding Callbacks are coming back to haunt me? </p> <pre><code>@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); uiHelper = new UiLifecycleHelper(this, callback); // line 45 in code uiHelper.onCreate(savedInstanceState); } </code></pre> <p>Thank you for your assistance</p> <p>// EDIT (Again) - wrong trace</p> <p>Here's the stack trace - there's a lot of ECLIPSE errors to wade through as well (cant figure how to get rid of them all), so just ignore those:</p> <pre><code>09-16 19:24:20.533: E/AndroidRuntime(1348): FATAL EXCEPTION: main 09-16 19:24:20.533: E/AndroidRuntime(1348): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.theperspectableone.carddisplayertemplate/com.theperspectableone.carddisplayertemplate.MainActivity}: java.lang.NullPointerException: Argument 'applicationId' cannot be null 09-16 19:24:20.533: E/AndroidRuntime(1348): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211) 09-16 19:24:20.533: E/AndroidRuntime(1348): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261) 09-16 19:24:20.533: E/AndroidRuntime(1348): at android.app.ActivityThread.access$600(ActivityThread.java:141) 09-16 19:24:20.533: E/AndroidRuntime(1348): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256) 09-16 19:24:20.533: E/AndroidRuntime(1348): at android.os.Handler.dispatchMessage(Handler.java:99) 09-16 19:24:20.533: E/AndroidRuntime(1348): at android.os.Looper.loop(Looper.java:137) 09-16 19:24:20.533: E/AndroidRuntime(1348): at android.app.ActivityThread.main(ActivityThread.java:5103) 09-16 19:24:20.533: E/AndroidRuntime(1348): at java.lang.reflect.Method.invokeNative(Native Method) 09-16 19:24:20.533: E/AndroidRuntime(1348): at java.lang.reflect.Method.invoke(Method.java:525) 09-16 19:24:20.533: E/AndroidRuntime(1348): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737) 09-16 19:24:20.533: E/AndroidRuntime(1348): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 09-16 19:24:20.533: E/AndroidRuntime(1348): at dalvik.system.NativeStart.main(Native Method) 09-16 19:24:20.533: E/AndroidRuntime(1348): Caused by: java.lang.NullPointerException: Argument 'applicationId' cannot be null 09-16 19:24:20.533: E/AndroidRuntime(1348): at com.facebook.internal.Validate.notNull(Validate.java:29) 09-16 19:24:20.533: E/AndroidRuntime(1348): at com.facebook.Session.&lt;init&gt;(Session.java:227) 09-16 19:24:20.533: E/AndroidRuntime(1348): at com.facebook.Session.&lt;init&gt;(Session.java:212) 09-16 19:24:20.533: E/AndroidRuntime(1348): at com.facebook.UiLifecycleHelper.onCreate(UiLifecycleHelper.java:87) 09-16 19:24:20.533: E/AndroidRuntime(1348): at com.theperspectableone.carddisplayertemplate.MainActivity.onCreate(MainActivity.java:45) 09-16 19:24:20.533: E/AndroidRuntime(1348): at android.app.Activity.performCreate(Activity.java:5133) 09-16 19:24:20.533: E/AndroidRuntime(1348): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) 09-16 19:24:20.533: E/AndroidRuntime(1348): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175) 09-16 19:24:20.533: E/AndroidRuntime(1348): ... 11 more </code></pre>
 

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