In the introduction to this chapter and in the previous chapter, we talked a bit about using other people's code, specifically via the classes and their methods of the Android API. We saw that we could do some quite complex things with insignificant amounts of code (such as talking to satellites).
To get us started coding, we are going to use two different classes from the Android API that allow us to output messages. The first class, Log, allows us to output messages to the logcat window. The second class, Toast, is not a tasty breakfast treat, but it will produce a toast-shaped pop-up message for our app's user to see.
Here is the code we need to write to send a message to the logcat:
Log.i("info","our message here");Exactly why this works will become clearer in Chapter 10, Object-Oriented Programming, but for now we just need to know that whatever we put between the two sets of quote marks will be output to the logcat window. We will see where...