testing aha

We are pleased to announce that the full SDK for Android 4.1 is now available to developers and can be downloaded through your SDK Manager. You can now develop and publish applications against API level 16 using new Jelly Bean APIs. We are also releasing SDK Tools revision 20.0.1 and NDK revision 8b containing bug fixes only.

For many people, their first taste of Jelly Bean will be on the beautiful Nexus 7. While most applications will run just fine on Nexus 7, who wants their app to be just fine? Here are some tips for optimizing your application to make the most of this device.

Screen

Giving Nexus 7 its name, is the glorious 7” screen. As developers we see this as around 600 * 960 density independent pixels and a density of tvdpi. As Dianne Hackborn has elaborated, this density might be a surprise to you but don’t panic! We actively discourage you from rushing out and creating new assets at this density; Android will scale your existing assets for you. In fact the entire Jelly Bean OS contains only a single tvdpi asset, the remainder are scaled down from hdpi assets.

To be sure the system can successfully scale your hdpi assets for tvdpi, take special care that your 9-patch images are created correctly so that they can be scaled down effectively:

• Make sure that any stretchable regions are at least 2x2 pixels in size, else they risk disappearing when scaled down.
• Give one pixel of extra safe space in the graphics before and after stretchable regions else interpolation during scaling may cause the color at the boundaries to change.

The 7” form factor gives you more space to present your content. You can use the sw600dp resource qualifier to provide alternative layouts for this size screen. For example your application may contain a layout for your launch activity:

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