Http status code null

[유정우]

i am making a program using android.

my state is that i got a accesstoken and make a connection using "FacebookClient facebookClient = new DefaultFacebookClient(MY_ACCESS_TOKEN);"

and when i run below sentence, get a http status code null

"Connection<Post> myFeed = facebookClient.fetchConnection("me/feed", Post.class); "

what is problem with me?

[Mark Allen]

Hi there -

Can you include your stack trace?

Thanks

Mark

[Licio Mazzeo]

Same problem here. If I fetch my friends list with facebook api for android, thats ok. but if i try tu use rest fb to fetch 

friends list i got this:

04-06 19:46:32.838: E/AndroidRuntime(6124): FATAL EXCEPTION: main

04-06 19:46:32.838: E/AndroidRuntime(6124): com.restfb.exception.FacebookNetworkException: A network error occurred while trying to communicate with Facebook: Facebook request failed (HTTP status code null)

04-06 19:46:32.838: E/AndroidRuntime(6124): at com.restfb.DefaultFacebookClient.makeRequestAndProcessResponse(DefaultFacebookClient.java:615)

04-06 19:46:32.838: E/AndroidRuntime(6124): at com.restfb.DefaultFacebookClient.makeRequest(DefaultFacebookClient.java:592)

04-06 19:46:32.838: E/AndroidRuntime(6124): at com.restfb.DefaultFacebookClient.makeRequest(DefaultFacebookClient.java:556)

04-06 19:46:32.838: E/AndroidRuntime(6124): at com.restfb.DefaultFacebookClient.fetchConnection(DefaultFacebookClient.java:219)

04-06 19:46:32.838: E/AndroidRuntime(6124): at org.pipe.android.medcenterapp.MainActivity$1.call(MainActivity.java:57)

04-06 19:46:32.838: E/AndroidRuntime(6124): at com.facebook.Session$3$1.run(Session.java:1190)

04-06 19:46:32.838: E/AndroidRuntime(6124): at android.os.Handler.handleCallback(Handler.java:725)

04-06 19:46:32.838: E/AndroidRuntime(6124): at android.os.Handler.dispatchMessage(Handler.java:92)

04-06 19:46:32.838: E/AndroidRuntime(6124): at android.os.Looper.loop(Looper.java:137)

04-06 19:46:32.838: E/AndroidRuntime(6124): at android.app.ActivityThread.main(ActivityThread.java:5041)

04-06 19:46:32.838: E/AndroidRuntime(6124): at java.lang.reflect.Method.invokeNative(Native Method)

04-06 19:46:32.838: E/AndroidRuntime(6124): at java.lang.reflect.Method.invoke(Method.java:511)

04-06 19:46:32.838: E/AndroidRuntime(6124): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)

04-06 19:46:32.838: E/AndroidRuntime(6124): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)

04-06 19:46:32.838: E/AndroidRuntime(6124): at dalvik.system.NativeStart.main(Native Method)

04-06 19:46:32.838: E/AndroidRuntime(6124): Caused by: android.os.NetworkOnMainThreadException

04-06 19:46:32.838: E/AndroidRuntime(6124): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117)

04-06 19:46:32.838: E/AndroidRuntime(6124): at java.net.InetAddress.lookupHostByName(InetAddress.java:385)

04-06 19:46:32.838: E/AndroidRuntime(6124): at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)

04-06 19:46:32.838: E/AndroidRuntime(6124): at java.net.InetAddress.getAllByName(InetAddress.java:214)

04-06 19:46:32.838: E/AndroidRuntime(6124): at libcore.net.http.HttpConnection.<init>(HttpConnection.java:70)

04-06 19:46:32.838: E/AndroidRuntime(6124): at libcore.net.http.HttpConnection.<init>(HttpConnection.java:50)

04-06 19:46:32.838: E/AndroidRuntime(6124): at libcore.net.http.HttpConnection$Address.connect(HttpConnection.java:340)

04-06 19:46:32.838: E/AndroidRuntime(6124): at libcore.net.http.HttpConnectionPool.get(HttpConnectionPool.java:87)

04-06 19:46:32.838: E/AndroidRuntime(6124): at libcore.net.http.HttpConnection.connect(HttpConnection.java:128)

04-06 19:46:32.838: E/AndroidRuntime(6124): at libcore.net.http.HttpEngine.openSocketConnection(HttpEngine.java:316)

04-06 19:46:32.838: E/AndroidRuntime(6124): at libcore.net.http.HttpsURLConnectionImpl$HttpsEngine.makeSslConnection(HttpsURLConnectionImpl.java:461)

04-06 19:46:32.838: E/AndroidRuntime(6124): at libcore.net.http.HttpsURLConnectionImpl$HttpsEngine.connect(HttpsURLConnectionImpl.java:433)

04-06 19:46:32.838: E/AndroidRuntime(6124): at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:290)

04-06 19:46:32.838: E/AndroidRuntime(6124): at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:240)

04-06 19:46:32.838: E/AndroidRuntime(6124): at libcore.net.http.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:81)

04-06 19:46:32.838: E/AndroidRuntime(6124): at libcore.net.http.HttpsURLConnectionImpl.connect(HttpsURLConnectionImpl.java:165)

04-06 19:46:32.838: E/AndroidRuntime(6124): at com.restfb.DefaultWebRequestor.executeGet(DefaultWebRequestor.java:99)

04-06 19:46:32.838: E/AndroidRuntime(6124): at com.restfb.DefaultFacebookClient$2.makeRequest(DefaultFacebookClient.java:597)

04-06 19:46:32.838: E/AndroidRuntime(6124): at com.restfb.DefaultFacebookClient.makeRequestAndProcessResponse(DefaultFacebookClient.java:609)

04-06 19:46:32.838: E/AndroidRuntime(6124): ... 14 more

[Mark Allen]

I don't do much Android work, but I can tell you this is your problem:

Caused by: android.os.NetworkOnMainThreadException

Thanks

Mark

[Licio Mazzeo]

mmmm ... maybe i have to execute the fetch code on another thread? I'll try...

2013/4/6 Mark Allen <m...@xmog.com>

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[Licio Mazzeo]

yes! that was the problem. 

2013/4/6 Licio Mazzeo <liz...@gmail.com>

[Felipe Caldas]

Yes, that was the problem.

Any chances you guys can add to the RestFB docs something like "Make sure to call our methods from within a Background Thread so you dont run against the  android.os.NetworkOnMainThreadException issue on Android"

An example code is the following:

facebookClient = new DefaultFacebookClient(session.getAccessToken());

AsyncTask.execute(new Runnable() {

public void run() {

try {

User user = facebookClient.fetchObject("me", User.class);

Log.i(TAG, user.getFirstName());

} catch(com.restfb.exception.FacebookException ex) {

Log.i(TAG, "" + ex.getMessage());

}

}

});

Take care 

Felipe

[Mark Allen]

If more people run into this, I'll update the docs, but as I understand it this is a basic Android development concept (network calls must not occur on the UI thread).

It does bring up a related point that it might be helpful for RestFB to support asynchronous versions of the methods in FacebookClient that return Future<Whatever>.  I'd have to think more about the best way to design that, however.

Thanks

Mark

[Eric Nguyen]

Hi Mark,

Regardless of the platform e.g. Android, I think it'll definitely be useful to make RestFb asynchronous :)

Looking forward to that :)

Thanks,

Eric

[Norbert Bartels]

Should be configurable :)