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General AttributesGeneral Attributes: 
Developer Google
Full Name Android 2.1
Released 2010 Jan 11
Codename Eclair
Short Name Android 2.1

Operating System Kernel:   Linux
Operating System Kernel Version:  2.6.29
Operating System Family:   Google Android family

Hardware EnvironmentHardware Environment: 

Supported CPU Instruction Set(s):   x86 (IA-32) , ARM instruction set

Additional InformationAdditional Information: 
Description Android 2.1 is a minor platform release deployable to Android-powered handsets starting in January 2010. This release includes new API changes and bug fixes. For information on changes, see the Framework API section.

For developers, the Android 2.1 platform is available as a downloadable component for the Android SDK. The downloadable platform includes a fully compliant Android library and system image, as well as a set of emulator skins, sample applications, and more. The downloadable platform includes no external libraries.

To get started developing or testing against the Android 2.1 platform, use the Android SDK and AVD Manager tool to download the platform into your Android SDK. For more information, see Adding SDK Components.

Built-in Applications

The system image included in the downloadable platform provides these
built-in applications:

  • Alarm Clock
  • Browser
  • Calculator
  • Camera
  • Contacts
  • Custom Locale (developer app)
  • Dev Tools (developer app)
  • Email

  • Gallery
  • IMEs for Japanese, Chinese, and Latin text input
  • Messaging
  • Music
  • Phone
  • Settings
  • Spare Parts (developer app)


The system image included in the downloadable platform provides a variety of
built-in locales. In some cases, region-specific strings are available for the
locales. In other cases, a default version of the language is used. The
languages that are available in the Android 2.1 system
image are listed below (with language_country/region locale

  • Chinese, PRC (zh_CN)
  • Chinese, Taiwan (zh_TW)
  • Czech (cs_CZ)
  • Dutch, Netherlands (nl_NL)
  • Dutch, Belgium (nl_BE)
  • English, US (en_US)
  • English, Britain (en_GB)
  • English, Canada (en_CA)
  • English, Australia (en_AU)
  • English, New Zealand (en_NZ)
  • English, Singapore(en_SG)
  • French, France (fr_FR)
  • French, Belgium (fr_BE)

  • French, Canada (fr_CA)

  • French, Switzerland (fr_CH)

  • German, Germany (de_DE)

  • German, Austria (de_AT)

  • German, Switzerland (de_CH)

  • German, Liechtenstein (de_LI)

  • Italian, Italy (it_IT)

  • Italian, Switzerland (it_CH)

  • Japanese (ja_JP)

  • Korean (ko_KR)

  • Polish (pl_PL)

  • Russian (ru_RU)

  • Spanish (es_ES)

  • Localized UI strings match the locales that are accessible
    through Settings.

    Emulator Skins

    The downloadable platform includes a set of emulator skins that you can use
    for modeling your application in different screen sizes and resolutions. The
    emulator skins are:

    • QVGA (240x320, low density, small screen)

    • WQVGA (240x400, low density, normal screen)

    • FWQVGA (240x432, low density, normal screen)

    • HVGA (320x480, medium density, normal screen)

    • WVGA800 (480x800, high density, normal screen)

    • WVGA854 (480x854 high density, normal screen)

    Framework API

    The sections below provide information about changes made to the application
    framework API provided by the Android 2.1 platform.

    API level

    The Android 2.1 platform delivers an updated version of
    the framework API. The Android 2.1 API
    is assigned an integer identifier —
    7 — that is
    stored in the system itself. This identifier, called the "API Level", allows the
    system to correctly determine whether an application is compatible with
    the system, prior to installing the application.

    To use APIs introduced in Android 2.1 in your
    application, you need to set the proper value, "7", in the
    attributes of the element in your application's

    For more information about how to use API Level, see the API Levels document.

    API changes summary

    The following is a summary of some notable changes to the framework APIs.

    Live Wallpapers

    The following additions provide APIs for you to develop animated wallpapers:

        * New android.service.wallpaper package.
        * New WallpaperInfo class.
        * Updated WallpaperManager.

    Additionally, if your application uses or provides Live Wallpapers, you must remember to add a element to the application's manifest, declaring the attribute android:name="". For example:

    When you've published your application, Android Market checks for the presence of this element and uses it as a filter, ensuring that your application is not made available to users whose devices do not support Live Wallpapers.

        * New SignalStrength class provides information about the device's current network signal. This can be acquired from the new onSignalStrengthsChanged(SignalStrength) callback.
        * New onDataConnectionStateChanged(int, int) callback.


        * New View methods isOpaque() and onDrawScrollBars(Canvas).
        * New RemoteViews methods addView(int, RemoteViews) and removeAllViews(int).
        * New ViewGroup methods isChildrenDrawingOrderEnabled() and setChildrenDrawingOrderEnabled(boolean).


        * New WebStorage methods to manipulate web storage databases.
        * New GeolocationPermissions methods to get Geolocation permissions from, and set them on the WebView.
        * New WebSettings methods to manage settings for app cache, web storage, and zooming based on screen density.
        * New WebChromeClient methods for handling video, browsing history, custom Views, app cache limits, and more.

    API differences report

    For a detailed view of all API changes in Android 2.1 (API Level 7), as compared to API Level 6, see the API Differences Report.

    Datasheet AttributesDatasheet Attributes: 

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    Data IntegrityData integrity level determines the integrity of the published information. Final datasheets are not intended to be modified in the future, preliminary ones can be based on unofficial information or speculations, incomplete ones are also preliminary b  Final
    AddedThe exact time of the datasheet addition 2009-12-10 11:09
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