Packages 
Package Description
com.google.api.client.extensions.android
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Utilities for Android.
com.google.api.client.extensions.android.http
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Utilities for Android HTTP transport.
com.google.api.client.extensions.android.json
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Low-level implementation of the GSON parser library built-in to the Android 3.0 SDK.
com.google.api.client.extensions.appengine.datastore
Support for the App Engine data store.
com.google.api.client.extensions.appengine.http
HTTP Transport library for Google API's based on URL Fetch in Google App Engine.
com.google.api.client.extensions.jdo
Support for the JDO data store.
com.google.api.client.http
Subset of HTTP 1.1 needed from the specification in RFC 2616: Hypertext Transfer Protocol -- HTTP/1.1.
com.google.api.client.http.apache
HTTP Transport library for Google API's based on Apache HTTP Client version 4.
com.google.api.client.http.javanet
HTTP Transport library for Google API's based on the java.net package.
com.google.api.client.http.json
JSON HTTP library based on the pluggable HTTP library.
com.google.api.client.http.protobuf
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HTTP utilities for the Protocol Buffer format based on the pluggable HTTP library.
com.google.api.client.http.xml
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XML HTTP library based on the pluggable HTTP library.
com.google.api.client.http.xml.atom
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Atom XML HTTP library based on the pluggable HTTP library.
com.google.api.client.json
com.google.api.client.json.gson
Low-level implementation of the GSON parser library based on the GSON JSON library.
com.google.api.client.json.jackson
Low-level implementation of the JSON parser library based on the Jackson JSON library.
com.google.api.client.json.jackson2
Low-level implementation of the JSON parser library based on the Jackson 2 JSON library.
com.google.api.client.json.rpc2
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JSON-RPC 2.0 as specified in JSON-RPC 2.0 Specification and JSON-RPC over HTTP .
com.google.api.client.json.webtoken
com.google.api.client.protobuf
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Utilities for the Protocol Buffer format.
com.google.api.client.testing.http
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Testing utilities used for writing tests based on this library.
com.google.api.client.testing.http.apache
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Testing utilities used for writing tests based on the Apache HTTP Client.
com.google.api.client.testing.http.javanet
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Testing utilities used for writing tests based on the java.net package.
com.google.api.client.testing.json
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Testing utilities used for writing tests based on this library.
com.google.api.client.testing.util
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Testing utilities used for writing tests based on this library.
com.google.api.client.util
General utilities used throughout this library.
com.google.api.client.util.escape
Character escaping utilities.
com.google.api.client.util.store
Utilities to store serializable data.
com.google.api.client.xml
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Utilities for XML.
com.google.api.client.xml.atom
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Utilities for Atom XML.