Changes

A clear understanding of how to use fragments (as outlined in the preceding chapters) is essential in order to be able to make use of the Master/Detail Flow template. This chapter will apply these skills to explain the concept of the Master/Detail user interface design before exploring in detail the elements that make up the Master/Detail Flow template included with Android Studio. Finally, an example application will be created that demonstrates the steps involved in modifying the template to meet the specific needs of the application developer.

A master/detail flow is an interface design concept whereby a list of items (referred to as the master list) is displayed to the user. On selecting an item from the list, additional information relating to that item is then presented to the user within a details panel. An email application might, for example, consist of a master list of received messages consisting of the address of the sender and the subject of the message. Upon selection of a message from the master list, the body of the email message would appear within the detail panel.

Figure 24-2

== Creating a Master/Detail Flow Activity ==