Facebook API Question posted in
The official documentation for the Facebook APIs can be found here.

Which password need to generate hash key for Facebook API in Android?

After went though Getting Started FaceBook API, I get an error message after pressing in Android app the Login button:

Invalid key hash. The key hash does not match ..

None of the existing SO accepted answers were useful.

When generating the hash which password should I fill? Or an arbitrary password is ok?

I also tryed to fill in the hash key in error message into Facebook site, but it did not help.

I am using mac.

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2

Answers


  1. 0

    Get the keyhash generated by below code and put that keyhash into your facebook app,call this method in your Login Activity and get the keyhash from Logcat.

     try {
        PackageInfo info = getPackageManager().getPackageInfo(
                "packagename",
                PackageManager.GET_SIGNATURES);
        for (android.content.pm.Signature signature : info.signatures) {
            MessageDigest md = MessageDigest.getInstance("SHA");
            md.update(signature.toByteArray());
            Log.d("KeyHash:", Base64.encodeToString(md.digest(), Base64.DEFAULT));
        }
    } catch (PackageManager.NameNotFoundException e) {

    } catch (NoSuchAlgorithmException e) {

 }
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  2. 0

    which OS you use?
    In case you use windows:

    1. go to your jdk/bin folder (usually in program files).
    2. copy the path.
    3. enter cmd.
    4. enter: cd {here paste the path}.
    5. search for your .android folder in your computer (usually in C:Usersname)
    6. copy the path.
    7. now, enter this in cmd:

    keytool -exportcert -alias androiddebugkey -keystore {path from
    6}.androiddebug.keystore | openssl sha1 -binary | openssl base64

    1. password: android
    2. copy the code and use it in facebook web.

    MAC:

    in section 7:

    keytool -exportcert -alias androiddebugkey -keystore
    ~/.android/debug.keystore | openssl sha1 -binary | openssl base64

    don’t forget to add in your activity:

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        callbackManager.onActivityResult(requestCode, resultCode, data);
    }
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