This thread is a bit old and I'm new to this, but I think I have found a preferred solution.
First, I assume that you are using Eclipse and the Android ADT plugin.
In Eclipse, select Window / Android SDK Manager. On the display, expand the entry for THE LATEST PLATFORMS, even if it is not the platform for which you are developing. As of January 2012, this is "Android 4.0.3 (API 15)." When expanding, the first entry is "Documentation for the Android SDK." Check the box next to it, and then click the Install button.
When done, you should have a new directory in your "android-sdks" called "doc". Look for "offline.html" there. Since it is packaged with the latest version, it will document the latest platform, but should also show the API for previous versions.
Omniary Jan 05 2018-12-12T00: 00Z
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