Nicolas Gramlich wrote:This document was written for developers who have worked with Java™ before and want to start developing for the Android Platform. I tried to make this as much "hands on" as possible, placing example codes everywhere it fit. Also I tried to insert as many picture as possible, because they liven up the learning process and relax the reader’s eyes.

But unfortunately coding is not everything; one has to learn about some basic facts of the Android Platform to fully understand. That is what is described on the first ~XXX pages. It is not necessary to read all those describing pages, but it is preferable. You could decide to treat it as a kind of reference. What you would read there is also explained when it occurs during the "hands on"-process. So you could directly start at Hello World – The Android Way.