Navigation is a critical part of a user's experience, and should be carefully thought out and designed. Material design has various different design structures and widgets to help you implement more effective navigation, but it's important to use them carefully and in the right place. As with any screen design, it's important to consider what the user will want to do most often, and to rank each possible action and navigation from the most important to the least on every screen they are available in.
In many applications, dedicated navigation components won't even be needed, and navigation will be achieved purely through goal-oriented actions from an overview screen or dashboard. In all instances, it's a good idea to draw up a navigation map ahead of time (even if it's incomplete or overly simplified). They will often tell you what sort of navigation structure and components your application will require.
Navigation achieved using the FragmentManager instead of always launching a new...
