The following are some useful bits and pieces for working with the Android SDK.

General

Go back to previous Activity

// Just call the following anywhere in the current Activity
finish();

Build and sign project

ant release -Dkey.store.password="[password]" -Dkey.alias.password="password"

Libraries do not get added to APK anymore after upgrade to ADT 22

To quote directly from this source:

“When upgrading, the ‘Order and Export’ of the new ‘Android Private Libraries’ is not always checked. And the android-support-v4.jar is now in this ‘Android Private Libraries’ section.

To fix this, go to ‘Order and Export’ and check ‘Android Private Libraries’. Then refresh/clean/rebuild.

After you done this ‘fix’ for a library project, you may need to just close and re-open any depending project, because they may not see this ‘fix’ immediately.”