Copy the database from the emulator/phone to view it. It can be done by using ADB:
adb pull /data/data/<packagename>/files/
That command will pull all Realm files created by Realm.getInstance(getContext()) or Realm.getInstance(new RealmConfiguration.Builder(context).build()). The default database file is called default.realm.
Note that this will only work on a emulator or rooted device.