android - error while adding development keyhash in developer.facebook.com -


i making demo app integrating facebook sso , made debug keyhash login via facebook when adding development keyhash in facebook developers site asking me release keyhash @ same time , dont want upload demo playstore , not allowing me finish process.

please suggest me can proceed.getting error while not putting release key hash

public void generatehashkeyforfacebook(context context) throws exception {         try {                packageinfo info = context.getpackagemanager().getpackageinfo("com.yourpackagename", packagemanager.get_signatures);             (signature signature : info.signatures) {                 messagedigest md = messagedigest.getinstance("sha");                 md.update(signature.tobytearray());                 log.d("fbkeyhash >>> ", base64.encodetostring(md.digest(), base64.default));             }         } catch (packagemanager.namenotfoundexception e) {             e.printstacktrace();         } catch (nosuchalgorithmexception e) {             e.printstacktrace();         }     }

just put function activity , see log cat obtaining hash key below link https://developers.facebook.com/docs/android/getting-started

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