Specific situation: I want a package providing a JSON Parser for Android (not self-written, I want to make sure it’s maintained and backed by someone). Google has one in com.google.gwt.json.client.JSONParser.
Is it possible to use this (and other GWT functionality) in Android?
(I know org.json is included in Android, but it has no parsing functionality.)
The Android SDK includes the org.json libraries. You can use them.
If you want something more high-level, you can include the GSON libraries. They work fine under Android.
To answer your question,
com.google.gwt.json.client.JSONParseris not available under Android. You won’t find anything under com.google.gwt in Android.