We all know that Android Marshmallow introduced runtime permissions letting user to allow or deny any permission at runtime. Implementing runtime permissions is a tedious process and developer needs to write lot of code just to get a single permission.
In this article, we are going to simplify the process of adding the runtime permissions using Dexter library. Using this library, the permissions can be implemented in few minutes.
This is an introductory article about the Dexter covering basic features offered by the library. Dexter provides other features like using it with SnackBar, different types of listeners, error handling and few other. You can find more information on Dexter’s developer page.
1. Dexter Permissions Library
To get started with Dexter, add the dependency in your build.gradle
2. Requesting Single Permission
To request a single permission, you can use withPermission() method by passing the required permission. You also need a PermissionListener callback to receive the state of the permission.
> onPermissionGranted() will be called once the permission is granted.
> onPermissionDenied() will be called when the permission is denied. Here you can check whether the permission is permanently denied by using response.isPermanentlyDenied() condition.
The below code requests CAMERA permission.
3. Requesting Multiple Permissions
To request multiple permissions at the same time, you can use withPermissions() method. Below code requests STORAGE and LOCATION permissions.
4. Error Handling
You can also catch any errors occurred while integrating the library using PermissionRequestErrorListener.