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Android 1.1 Version Notes

Date: February 2009
API Level: 2

This document provides version notes for the Android 1.1 system image included in the SDK.


The Android 1.1 system image delivered in the SDK is the development counterpart to the Android 1.1 production system image, deployable to Android-powered handsets starting in February 2009.

The Android 1.1 system image delivers an updated version of the framework API. As with the Android 1.0 API, the Android 1.1 API is assigned an integer identifier — 2 — 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.

Applications indicate the lowest system API Level that they are compatible with by adding a value to the android:minSdkVersion attribute. The value of the attribute is an integer corresponding to an API Level identifier. Prior to installing an application, the system checks the value of android:minSdkVersion and allows the install only if the referenced integer is less than or equal to the API Level integer stored in the system itself.

If you use the Android 1.1 system image to build an application compatible with Android-powered devices running the Android 1.1 platform, you must set the android:minSdkVersion attribute to "2" in order to specify that your application is compatible only with devices using the Android 1.1 (or greater) system image.

Specifically, you specify the android:minSdkVersion attribute in a <uses-sdk> element as a child of <manifest> in the manifest file. When set, the attribute looks like this:

  <uses-sdk android:minSdkVersion="2" />

By setting android:minSdkVersion in this way, you ensure that users will only be able to install your application if their devices are running the Android 1.1 platform. In turn, this ensures that your application will function properly on their devices, especially if it uses APIs introduced in Android 1.1.

If your application uses APIs introduced in Android 1.1 but does not declare <uses-sdk android:minSdkVersion="2" />, then it will run properly on Android 1.1 devices but not on Android 1.0 devices. In the latter case, the application will crash at runtime when it tries to use the Android 1.1 APIs.

If your application does not use any new APIs introduced in Android 1.1, you can indicate Android 1.0 compatibility by removing android:minSdkVersion or setting the attribute to "1". However, before publishing your application, you must make sure to compile your application against the Android 1.0 system image (available in the Android 1.0 SDK), to ensure that it builds and functions properly for Android 1.0 devices. You should test the application against system images corresponding to the API Levels that the application is designed to be compatible with.

If you are sure your application is not using Android 1.1 APIs and has no need to use them, you might find it easier to keep working in the Android 1.0 SDK, rather than migrating to the Android 1.1 SDK and having to do additional testing.

External Libraries

The system image includes these external libraries, which you can access from your application by adding a <uses-library>.

Device Compatibility

The Android 1.1 system image was tested for compatability with the Android-powered devices listed below:

Built-in Applications

The system image includes these built-in applications:

UI Localizations

The system image provides localized UI strings for the languages listed below.

Localized UI strings match the locales that are displayable in the emulator, accessible through the device Settings application.

Resolved Issues

New Features

API Changes


API Change Details

Module or FeatureChange Description
Annotations for test systems
Added LargeTest annotation.
Added MediumTest annotation.
Added SmallTest annotation.
Allow a process to easily know its UID.
Added public method myUid() to class android.os.Process
Padding in views
Added public method getBottomPaddingOffset() to class android.view.View.
Added public method getLeftPaddingOffset() to class android.view.View.
Added public method getRightPaddingOffset() to class android.view.View.
Added public method getTopPaddingOffset() to class android.view.View.
Added public method isPaddingOffsetRequired() to class android.view.View.
Marquee support
Added public method setMarqueeRepeatLimit(int) to class TextView
Added public field android.R.attr.marqueeRepeatLimit
New permissions
Added public field android.Manifest.permission.BROADCAST_SMS
Added public field android.Manifest.permission.BROADCAST_WAP_PUSH
API cleanup
Removed protected constructor
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