Android 9 Development Cookbook - Third Edition

How it works...

The key here is the call to setContentView(), which we have come across before in the autogenerated onCreate() code. Just pass a layout ID to setContentView() and it automatically inflates the layout.

This code is meant to make the concept easy to understand but would be overkill for simply changing the property of a button (in this example, we could just change the alignment on the button click). Inflating the layout is usually needed once, in the onCreate() method, but there are times when you may want to manually inflate a layout, as we did here. (If you were manually handling orientation changes, it would be a good example.)