Basic Components of React Native (Part 2) | BackHandler | DrawerLayout | PermissionAndroid | Toast.

Docs-https://reactnative.dev/docs/components-and-apis

BackHandler-
The Backhandler API detects hardware button presses for back navigation, lets you register event listeners for the system's back action, and lets you control how your application responds. It is Android-only

DrawerLayoutAndroid-
React component that wraps the platform DrawerLayout (Android only). The Drawer (typically used for navigation) is rendered with renderNavigationView and direct children are the main view (where your content goes). The navigation view is initially not visible on the screen, but can be pulled in from the side of the window specified by the drawerPosition prop and its width can be set by the drawerWidth prop.

PermissionsAndroid -
PermissionsAndroid provides access to Android M's new permissions model. The so-called "normal" permissions are granted by default when the application is installed as long as they appear in AndroidManifest.xml. However, "dangerous" permissions require a dialog prompt. You should use this module for those permissions.

ToastAndroid
React Native's ToastAndroid API exposes the Android platform's ToastAndroid module as a JS module. It provides the method show(message, duration) which takes the following parameters:

message A string with the text to toast
duration The duration of the toast—either ToastAndroid.SHORT or ToastAndroid.LONG
You can alternatively use showWithGravity(message, duration, gravity) to specify where the toast appears in the screen's layout. May be ToastAndroid.TOP, ToastAndroid.BOTTOM or ToastAndroid.CENTER.

ActivityIndicator
Displays a circular loading indicator.

React Native Playlist-https://youtube.com/playlist?list=PLB6UeRCNBspcc49diGJtpaCA8ZtAyl-l_