If you've been using Eclipse with ADT, be aware that the ADT plugin is no longer in active -development, so you should migrate to Android Studio as soon as possible. For help moving projects, +
If you have been using Eclipse with ADT, be aware that Android Studio is now the official IDE +for Android, so you should migrate to Android Studio in order to continue to receive all the +latest IDE updates. For help moving projects, see Migrating to Android Studio.