facebook integration is not working when the mobile have already facebook application android?

Question

In my application i want to integrate the facebook. I wrote all the code for this.But whenever i click the facebook login button it showing one popup like "Invalid key hash and the key hash XXX does not match with any stored key hash" If my mobile not having facebook application, then it is working. If my mobile is having facebook app the facebook integration is not possible to me.

for hash key: (oncreate)

 try {
            Log.v("TAG_PACKNAME",""+"UUUU");
            PackageInfo info = getPackageManager().getPackageInfo(
                    "Your package name",
                    PackageManager.GET_SIGNATURES);
            for (Signature signature : info.signatures) {
                MessageDigest md = MessageDigest.getInstance("SHA");
                md.update(signature.toByteArray());
                Log.v("TAG_PACKNAME",""+ Base64.encodeToString(md.digest(), Base64.DEFAULT));  // not printing

            }
        } catch (PackageManager.NameNotFoundException e) {

        } catch (NoSuchAlgorithmException e) {

        }

i got hash key and release key too. i added both developement key and release key in facebook console. But whenever i click the facebook login button it pop ups like "invalid hash key. the hash key not matched with already stored hashkey" please any one help me out.

@ turtle, how i get key hash in android studio? i am usinng windows os — learner android, Apr 08 '15 at 09:18
from one week i am trying this. But till now i didnt get anytng — learner android, Apr 08 '15 at 09:21
whatever keyhash it is showing when you try to login just add that in your application's facebook developer console and add "=" in it or use [this](http://stackoverflow.com/questions/5989237/generating-hash-key-for-app-using-facebook-sdk) link to get how to get keyhash programmatically — Kunu, Apr 08 '15 at 09:25
this line md.update(signature.toByteArray());// toByteArray showing error to me.(cant resolved the symbol toByteArray) — learner android, Apr 08 '15 at 09:38
If my mobile not having facebook application, then it is working. If my mobile is having facebook app the facebook integration is not possible to me. — learner android, Apr 08 '15 at 09:50
Check you are importing `android.content.pm.Signature` or not — Kunu, Apr 08 '15 at 10:04
@kunu, If my mobile not having facebook application, then it is working. If my mobile is having facebook app the facebook integration is not working and pop up this error — learner android, Apr 08 '15 at 10:07
That's because of hashkey mismatch. When you have facebook application it is looking for hashkey otherwise it is directing to the web browser. — Kunu, Apr 08 '15 at 10:10
ho k. please provide me how i get release key. (now i am trying for hash key with your code) — learner android, Apr 08 '15 at 10:11
just export your apk and run it again and you will find released keyhash in your logcat. — Kunu, Apr 08 '15 at 10:16
@kunu.. once see my edited post. hash key is not coming programatically — learner android, Apr 08 '15 at 10:38
Are you giving your package name? And print your error in catch block. — Kunu, Apr 08 '15 at 10:40
main package name or the package name which the activity contain na? — learner android, Apr 08 '15 at 10:41
@kunu thankyou i got hash key. now tell me how i get release key. export the apk means? ( i m new to android) — learner android, Apr 08 '15 at 10:44
Follow [http://stackoverflow.com/questions/4853011/how-to-sign-an-android-apk-file](http://stackoverflow.com/questions/4853011/how-to-sign-an-android-apk-file) or [http://developer.android.com/tools/publishing/app-signing.html](http://developer.android.com/tools/publishing/app-signing.html) — Kunu, Apr 08 '15 at 10:54
it means after i get the apk from android studio i need to run the appliation again. at that time i get release key. am i ryt? — learner android, Apr 08 '15 at 11:00
@kunu after i enter the hash key in facebook, now the error is "this app has no android key hashes configured" — learner android, Apr 08 '15 at 11:31
Where are you using the hash key? You need to use that in facebook console not in your native application. — Kunu, Apr 08 '15 at 11:37
@kunu after export the apk and run the app also i got same hash key — learner android, Apr 09 '15 at 05:53
Can you please post the exact error message showing in your mobile when you are trying to login? — Kunu, Apr 09 '15 at 05:55
@kunu programatically i got the hash key i.e after export the apk and run i got another hash key 0Txxxu=. in fb console in dev hash key i gave cWXXXXDU=. and for release key i gave 0Txxxu= — learner android, Apr 09 '15 at 06:09
but after i click the login button again same error like "invalid key hash. The key hash cWXXXXDU= does not match any stored hash key. The hash key i got and what the pop up hash key also same — learner android, Apr 09 '15 at 06:11
Okay so you are telling that lets `XYZ=` hashkey is stored in your dev console and while you are trying to login it showing `XYZ= does not match any stored hash key` — Kunu, Apr 09 '15 at 06:19

facebook integration is not working when the mobile have already facebook application android?

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