Initially, no project or file is displayed in the main view of Android Studio, as you can see in the next screenshot. As Android Studio suggests, press Alt +1, or cmd 1 if you are using a Mac, to open the project view. You can also open it by clicking on the Project button on the left edge of the screen:
The Project view shows the list of the open projects. These projects are displayed in a hierarchical view. We can change the type of view from the upper-left corner of the project explorer. In the upper-right corner of the Project view, there are some actions and a drop-down menu to configure the selected type of the Project view. These actions are highlighted in the following screenshot:
Open the view selector from the upper-left corner to see the complete list of view types that you can select, which the following screenshot shows:
These are the available types of view to navigate through your project: