Some people often ask me in the Group how to learn Android well and let me recommend a book. In fact, I personally do not recommend you read books. After all, Android has just been out for more than two years and there are no classic books on the market. Most of them copy each other and copy APIs together.
In fact, most technical books in China are like this, so I suggest you go directly to the API. The most understandable is the android development documentation. In this age, it may be difficult for the daughter-in-law to find a hand, but the information is still very easy to find! Some examples must be clarified and completed independently. Don't look at a sentence, it does not do much! Learn to think independently and solve problems by yourself. You have more experience in solving problems. In fact, 95% of questions can be answered online!
The following figure shows a learning path for Android. Not necessarily in this order. Finding the right one is the best!