Android NDK r3

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The third release of the Android Native Development Kit (NDK) is now available for download from the Android developer site.

It can be used to target devices running Android 1.5 and higher. In addition to a few bug fixes and improvements, this release includes the following new features:

Toolchain improvement

The toolchain binaries have been refreshed for this release with GCC 4.4.0, which should generate slightly more compact and efficient machine code than the previous one (4.2.1).

Note that the GCC 4.4.0 C++ frontend is more pedantic, and may refuse to compile certain rare and invalid template declarations that were accepted by 4.2.1. To alleviate the problem, this NDK still provides the 4.2.1 binaries, which can optionally be used to build your machine code.

OpenGL ES 2.0 support

Applications targeting Android 2.0 (API level 5) or higher can now directly access OpenGL ES 2.0 features. This brings the ability to control graphics rendering through vertex and fragment shader programs, using the GLSL shading language.

A new trivial sample, named "hello-gl2", demonstrates how to render a simple triangle using both shader types.

Name simplification

This NDK release is just called "r3", for "Revision 3", to indicate that it is not limited to a specific Android platform/API level. Some developers thought that the previous release's name (1.6_r1) was confusing and indicated that it could only be used to target Android 1.6, which was not true.

Enjoy!

Android SDK m5-rc14 now available

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On behalf of the entire Android team, I'm happy to let you know that an updated version of the Android SDK – we're calling it m5-rc14 – is now available. Today, we're continuing the early look at the Android SDK that we started back in November by providing updates to the Android APIs and the developer tools based, in part, on the great feedback and suggestions developers have been giving us. We're excited about the progress that we've made and look forward to making additional updates in the future as the platform evolves towards production-readiness.

There are a couple of changes in m5-rc14 I'd like to highlight:

• New user interface - As I mentioned when we introduced the m3 version of the Android SDK, we're continuing to refine the UI that's available for Android. m5-rc14 replaces the previous placeholder with a new UI, but as before, work on it is still in-progress.
• Layout animations - Developers can now create layout animations for their applications using the capabilities introduced in the android.view.animation package. Check out the LayoutAnimation*.java files in the APIDemos sample code for examples of how this works.
• Geo-coding - android.location.Geocoder enables developers to forward and reverse geo-code (i.e. translate an address into a coordinate and vice-versa), and also search for businesses.
• New media codecs - The MediaPlayer class has added support for the OGG Vorbis, MIDI, XMF, iMelody, RTTL/RTX, and OTA audio file formats.
• Updated Eclipse plug-in - A new version of ADT is available and provides improvements to the Android developer experience. In particular, check out the new Android Manifest editor.

You can find more information about what's changed in a couple of documents that we've published. First is an overview of the changes to the Android APIs in API Changes Overview. If you want a more granular view of what's changed, an API diff between m3-rc37 and m5-rc14 is also available. Finally, Upgrading the SDK provides links to the two previously referenced documents and the release notes, as well as instructions on how to upgrade your development environment.

We still need your help in shaping the platform, so if you find issues with the Android APIs or the developer tools, please let us know through the Android Issue Tracker. If you have general comments or questions, please head on over to the Android groups to get in touch.

We're looking forward to all the applications that developers will create using this new version of the Android SDK. Of course, you can use m5-rc14 or any older version of the SDK for your Android Developers Challenge submission.

Android SDK Tools, Revision 20

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[This post is by Xavier Ducrohet, Tech Lead for the Android developer tools]

Along with the preview of the Android 4.1 (Jelly Bean) platform, we launched Android SDK Tools R20 and ADT 20.0.0. Here are a few things that we would like to highlight.

Application templates: Android ADT supports a new application templates for creating new application, blank activity, master-detail flow, and custom view. These templates support the Android style guide thus making it faster and easier to build beautiful apps. More templates will be added over time.

Tracer for GLES: With this new tool you can capture the entire sequence of OpenGL calls made by an app into a trace file on the host and replay the captured trace and display the GL state at any point in time.

Device Monitor: To help you to easily debug your apps, all the Android debugging tools like DDMS, traceview, hierarchyviewer and Tracer for GLES are now built into one single application.

Systrace: Improving app performance does not have to be a guesswork any more. Systrace for Jelly Bean and above lets you easily optimize your app. You can capture a slice of system activity plus additional information tagged from the Settings > Developer Options > Monitoring: Enable traces or with specific calls added to your application code.

To learn more on the layout editor, XML editing, build system & SDK Manager improvements, please read the ADT 20.0.0 and SDK Tools R20 release notes.

Join us today, June 28th, at the “What’s new in Android developer tools” session for some fun tool demos and a sneak-peak into what’s coming next.

Android SDK update: m5-rc15 released

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Earlier today we released an update to the Android SDK – we're calling it m5-rc15. With this update, the SDK now includes all of the incremental changes we've been making to the online documentation since m5-rc14 was released in mid-February. In addition to the latest documentation, we've also fixed a security issue involving handling of image files.

We recommend that you install m5-rc15 at your earliest convenience. The update doesn't change any of the Android APIs or introduce any new ones. Eclipse users don't need to update the ADT plug-in either.

Once you've unzipped the file on your machine, you will want to update things like your PATH variable and, if you're using Eclipse, the SDK location setting for ADT (hint: Preferences > Android).

Android Photostream

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I'm pleased to announce that a new open source sample application—called Photostream—has been added to the apps-for-android project. Photostream is a simple photos browser and viewer for Flickr. All you need to use it is a Flickr screen name or user name (the application offers a default user name if you just want to try it.)

This application serves as an illustrative example of several Android features and APIs:

• Activity aliases
• Adding custom shortcuts to Home
• Adding a new wallpaper chooser to the system
• Custom layouts
• Custom XML attributes
• Use of themes
• Use of styles
• Use of text colors
• Use of
• Use of bitmap and layer drawables from XML
• Use of HttpClient
• Proper interaction between background threads and the UI thread
• Efficient display rotation (using the new onRetainNonConfigurationInstance() API)
• Animations and layout animations
• Cropping an image
• Image manipulation

My favorite feature is the ability to add a new shortcut type in Home, to create a shortcut to any Flickr account. The shortcut shows a custom icon, downloaded from the Flickr user profile:

If you plan on reusing the source code to access Flickr in your own application, you should modify the Flickr.java file to replace the existing API key with your own. The application source code also contains a very handy class called UserTask.java. This class is designed to help you easily write background operations that interact with the UI thread.