Markup languages control presentation data Another example of a markup language ... the publishing industry for decades. XML performs the same function in Android app development: describing ...

The emulator runs Android in a kind of virtual machine ... activity_main.xml, and strings.xml. For our example app we will add a Button with the label “Tap Me!”, we will change the default ...

To demonstrate multi-touch, we’re going to build a simple image viewer application that lets you zoom in and scroll around an image. See Part 1 for a screenshot of the finished product.