Along with the Android 4.2 (Jelly Bean) SDK platform update, Google also, launched an update to the Android SDK Tools--"Revision 21 release today now includes new tools and capabilities that can help you work more efficiently as you create applications."
Here are the new tools added to the SDK Tolls Revision 21:
Tools R21 brings three new app templates to help you to easily add new screens to your app. "There's a new full-screen activity for use as a photo or video viewer, a settings activity to handle basic user preferences and a login activity to capture username/password," informs Google.
One-click SDK installer offer a convenient way to download all the various SDK components like Tools, Platform Tools, Eclipse ADT, and the latest system image with a single click. "Existing developers can continue to manage their SDK components and get updates through the SDK Manager."
25 new Lint rules are now available and "catch several common sources of bugs, for example deviations from Android design guide for icons, checks for mismanaged wakelocks, common sources of locale-related bugs and so on."
Revamped AVD creation dialog makes it easier to create Android Virtual Devices (AVDs) matching real device profiles. "The AVDs will also appear in the layout editor to show you how the layouts will look," google added.
UI Automator Test Framework, is a new software testing framework available in Tools R21 that provides you with tools to easily automate UI testing tasks.
"The tool provides a GUI tool to scan and analyze the UI components of an Android application (uiautomatorviewer), a library containing APIs to create customized functional UI tests, and an execution engine to automate and run the tests against multiple physical devices," google explains.
Multi-config editor allows to develop and prototype your UI across various orientations, screen sizes and locales. "You can see previews for other screen sizes from small phones to large tablets, you can see previews for the layout using all the available language translations in your app, and so on. You can even see how the layout appears when it is included as a fragment in a different larger layout," google stated.
Finally, Android allows you to create specialized layouts for any of these configurations, and the multi configuration editor shows you these overridden layouts.
For new developers, one-click SDK download and new app templates help you get started more quickly. And, for a complete list of what's new, see the release notes for SDK Tools R21, ADT 21.0.0 and Android NDK R8c.