Android Upgrading the SDK

http://developer.android.com/sdk/1.5_r2/upgrading.html

1. Update Your Eclipse ADT Plugin

• Select Help > Software Updates.
• Select the Installed Software tab.
• Select "Android Editors". Click Uninstall.
• In the next window, be sure "Android Editors" is checked, then click Finish to uninstall.
• Restart Eclipse.
• (Do not uninstall "Android Development Tools".)

1. Install the 0.9 ADT plugin

• Select Help > Software Updates.
• Select the Available Software tab.
• Expand the entry for the Andriod plugin (may be listed as the location URL) and select "Developer Tools" by checking the box next to it, then click Install.
• On the next window, "Android DDMS" and "Android Development Tools" should both be checked. Click Finish.
• Restart Eclipse.

延伸閱讀
Android SDK 1.1升級至1.5的流程