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Gentle Introduction To Android Studio File Structure 1. AndroidManifest It is a declaration file. Here only Which activity should start first, that has been declared. It declares which permissions the application must have. It also declares the permissions that others are required to have in order to interact. It declares the minimum level of the Android API. It lists the libraries that the application must be linked. All the component should declared here. The components are activities, services, broadcast receivers, and content providers. 2. Java  eg, like hello world program to test and all of your android function are write on this java package file Hello World 3. Drawable  Drawable is something which can be drawn. E.g. layout, vector image (line, circle), font, image and so on. 4. Layout  The layout defines the visual structure for your app. Android uses this structure to display the view elements on the screen. The most common are linear, r...