These are the Android APIs.
| android | Contains the resource classes used by standard Android applications. |
| android.app | High-level classes encapsulating the overall Android application model. |
| android.appwidget | Android allows applications to publish views to be embedded in other applications. These views are called widgets, and are published by "AppWidget providers." The component that can contain widgets is called a "AppWidget host." For more information, see the AppWidgets documentation in the Dev Guide. |
| android.content | Contains classes for accessing and publishing data on the device. |
| android.content.pm | Contains classes for accessing information about an application package, including information about its activities, permissions, services, signatures, and providers. |
| android.content.res | Contains classes for accessing application resources, such as raw asset files, colors, drawables, media or other other files in the package, plus important device configuration details (orientation, input types, etc.) that affect how the application may behave. |
| android.database | Contains classes to explore data returned through a content provider. |
| android.database.sqlite | Contains the SQLite database management classes that an application would use to manage its own private database. |
| android.graphics | Provides low level graphics tools such as canvases, color filters, points, and rectangles that let you handle drawing to the screen directly. |
| android.graphics.drawable | Provides classes to manage a variety of visual elements that are intended for display only, such as bitmaps and gradients. |
| android.graphics.drawable.shapes | Contains classes for drawing geometric shapes. |
| android.hardware | Provides support for hardware devices that may not be present on every Android device. |
| android.inputmethodservice | Base classes for writing input methods. |
| android.location | Classes defining Android location-based and related services. |
| android.media | Provides classes that manage various media interfaces in audio and video. |
| android.net | Classes that help with network access, beyond the normal java.net.* APIs. |
| android.net.http | |
| android.net.wifi | Provides classes to manage Wi-Fi functionality on the device. |
| android.opengl | Provides OpenGL utilities. |
| android.os | Provides basic operating system services, message passing, and inter-process communication on the device. |
| android.preference | Provides classes that manage application preferences and implement the preferences UI. |
| android.provider | Provides convenience classes to access the content providers supplied by Android. |
| android.sax | A framework that makes it easy to write efficient and robust SAX handlers. |
| android.speech | |
| android.telephony | Provides APIs for monitoring the basic phone information, such as the network type and connection state, plus utilities for manipulating phone number strings. |
| android.telephony.gsm | Provides APIs for utilizing GSM-specific telephony features, such as text/data/PDU SMS messages. |
| android.test | A framework for writing Android test cases and suites. |
| android.test.mock | Utility classes providing stubs or mocks of various Android framework building blocks. |
| android.test.suitebuilder | Utility classes supporting the test runner classes. |
| android.text | Provides classes used to render or track text and text spans on the screen. |
| android.text.format | |
| android.text.method | Provides classes that monitor or modify keypad input. |
| android.text.style | Provides classes used to view or change the style of a span of text in a View object. |
| android.text.util | Utilities for converting identifiable text strings into clickable links and creating RFC 822-type message (SMTP) tokens. |
| android.util | Provides common utility methods such as date/time manipulation, base64 encoders and decoders, string and number conversion methods, and XML utilities. |
| android.view | Provides classes that expose basic user interface classes that handle screen layout and interaction with the user. |
| android.view.animation | Provides classes that handle tweened animations. |
| android.view.inputmethod | Framework classes for interaction between views and input methods (such as soft keyboards). |
| android.webkit | Provides tools for browsing the web. |
| android.widget | The widget package contains (mostly visual) UI elements to use on your Application screen. |
| com.android.internal.os | |
| dalvik.bytecode | Provides classes surrounding the Dalvik bytecode. |
| dalvik.system | Provides utility and system information classes specific to the Dalvik VM. |
| java.awt.font | |
| java.beans | |
| java.io | Provides input and output facilities by means of streaming, file system access and serialization. |
| java.lang | Provides core classes of the Android environment. |
| java.lang.annotation | Defines interfaces and exceptions necessary for annotation support. |
| java.lang.ref | |
| java.lang.reflect | |
| java.math | Provides arbitrary-precision integers and decimals. |
| java.net | Provides networking-related functionality, such as streaming and datagram sockets, handling of Internet addresses, and dealing with HTTP requests. |
| java.nio | Provides buffers that help handling data. |
| java.nio.channels | Channels provide a way to connect to sources of data such as files, sockets or other structures that allow input and/or output of data. |
| java.nio.channels.spi | Service-provider classes for nio channels. |
| java.nio.charset | This package provides translation services between bytes and different character sets. |
| java.nio.charset.spi | Service-provider class for nio charset. |
| java.security | This package provides all the classes and interfaces that constitute the Java security framework. |
| java.security.acl | This package provides the classes and the interfaces needed to build Access Control Lists. |
| java.security.cert | This package provides all the classes and all the interfaces needed to generate, administer and verify X.509 certificates. |
| java.security.interfaces | This package provides the interfaces needed to generate: (1) Keys for the RSA asymmetric encryption algorithm using the PKCS#1 standard; (2) Keys for the Digital Signature Algorithm (DSA) specified by FIPS-186; (3) Keys for a generic Elliptic Curve asymmetric encryption algorithm. |
| java.security.spec | This package provides the classes and interfaces needed to specify keys and parameters for encryption and signing algorithms. |
| java.sql | Provides a standard interface for accessing SQL-based databases. |
| java.text | The java.text package allows to uncouple the text in an application from natural languages. |
| java.util | Provides an extensive set of utility classes. |
| java.util.concurrent | Utility classes commonly useful in concurrent programming. |
| java.util.concurrent.atomic | A small toolkit of classes that support lock-free thread-safe programming on single variables. |
| java.util.concurrent.locks | Interfaces and classes providing a framework for locking and waiting for conditions that is distinct from built-in synchronization and monitors. |
| java.util.jar | The java.jar package gives access to reading and writing a Java archive, or JAR, files. |
| java.util.logging | This package allows to add logging to any application. |
| java.util.prefs | This package provides a preferences mechanism, that is, a means of writing configuration data (key/value pairs) to a persistent data store and retrieving it from there. |
| java.util.regex | Provides an implementation of regular expressions, which is useful for matching, searching, and replacing strings based on patterns. |
| java.util.zip | This package contains classes for compressing and decompressing data in ZIP and GZIP file formats. |
| javax.crypto | This package provides the classes and interfaces for cryptographic applications implementing algorithms for encryption, decryption, or key agreement. |
| javax.crypto.interfaces | This package provides the interfaces needed to implement the Diffie-Hellman (DH) key agreement's algorithm as specified by PKCS#3. |
| javax.crypto.spec | This package provides the classes and interfaces needed to specify keys and parameter for encryption. |
| javax.microedition.khronos.egl | |
| javax.microedition.khronos.opengles | |
| javax.net | This package provides factory classes to create sockets and server-sockets. |
| javax.net.ssl | This package provides all the classes and interfaces needed to implemenet and program the Secure Socket abstraction based on the SSL protocol SSSLv3.0 or TLSv1.2. |
| javax.security.auth | This package provides the classes and interfaces needed to implemenet and program different methods of users' authentification and role based users' authorization. |
| javax.security.auth.callback | This package provides classes and interfaces needed to interact with the application in order to execute the authentification and authorization processes. |
| javax.security.auth.login | This package provides a pluggable and stackable authentication system based on ideas and concepts from the Unix-PAM module. |
| javax.security.auth.x500 | This package provides classes needed to store X.500 principals and their credentials. |
| javax.security.cert | This package is provided only for compatibility reasons. |
| javax.sql | Provides extensions to the standard interface for accessing SQL-based databases. |
| javax.xml | Provides a utility class with useful XML constants. |
| javax.xml.parsers | Provides facilities for parsing XML documents and building Document Object Model (DOM) trees from them. |
| junit.framework | The junit test framework. |
| junit.runner | Utility classes supporting the junit test framework. |
| org.apache.http | The core interfaces and classes of the HTTP components. |
| org.apache.http.auth | The API for client-side HTTP authentication against a server, commonly referred to as HttpAuth. |
| org.apache.http.auth.params | Parameters for configuring HttpAuth. |
| org.apache.http.client | The API for client-side HTTP communication and entry point to the HttpClient module. |
| org.apache.http.client.entity | |
| org.apache.http.client.methods | Request implementations for the various HTTP methods like GET and POST. |
| org.apache.http.client.params | Parameters for configuring HttpClient. |
| org.apache.http.client.protocol | Additional request and response interceptors. |
| org.apache.http.client.utils | Helpers and utility classes for HttpClient. |
| org.apache.http.conn | The client-side connection management and handling API at the heart of what is referred to as HttpConn. |
| org.apache.http.conn.params | Parameters for configuring HttpConn. |
| org.apache.http.conn.routing | The client-side route representation and tracking API, part of HttpConn. |
| org.apache.http.conn.scheme | |
| org.apache.http.conn.ssl | TLS/SSL specific parts of the HttpConn API. |
| org.apache.http.conn.util | |
| org.apache.http.cookie | The API for client-side state management via cookies, commonly referred to as HttpCookie. |
| org.apache.http.cookie.params | Parameters for configuring HttpCookie. |
| org.apache.http.entity | Representations for HTTP message entities. |
| org.apache.http.impl | Default implementations for interfaces in org.apache.http. |
| org.apache.http.impl.auth | |
| org.apache.http.impl.client | |
| org.apache.http.impl.conn | |
| org.apache.http.impl.conn.tsccm | The implementation of a thread-safe client connection manager. |
| org.apache.http.impl.cookie | |
| org.apache.http.impl.entity | Default implementations for interfaces in org.apache.http.entity. |
| org.apache.http.impl.io | Default implementations for interfaces in org.apache.http.io. |
| org.apache.http.io | The transport layer abstraction of the HTTP components. |
| org.apache.http.message | A selection of HTTP message implementations. |
| org.apache.http.params | The parameterization framework for HTTP components. |
| org.apache.http.protocol | HTTP protocol execution framework. |
| org.apache.http.util | Mostly utility classes with static helper methods for various purposes. |
| org.json | |
| org.w3c.dom | Provides the official W3C Java bindings for the Document Object Model, level 2 core. |
| org.xml.sax | This package provides the core SAX APIs. |
| org.xml.sax.ext | This package contains interfaces to SAX2 facilities that conformant SAX drivers won't necessarily support. |
| org.xml.sax.helpers | This package contains "helper" classes, including support for bootstrapping SAX-based applications. |
| org.xmlpull.v1 | |
| org.xmlpull.v1.sax2 |
