Implementing Multiple Runtime Permissions in Android without Third-Party Libraries

By following these steps, you can ensure your app complies with modern Android best practices for permission handling.

Check Permissions Availability:

Before requesting permissions, check if they are already granted using the checkSelfPermission method:

if (ContextCompat.checkSelfPermission(this, Manifest.permission.READ_CONTACTS) == PackageManager.PERMISSION_GRANTED
        && ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) == PackageManager.PERMISSION_GRANTED) {
    // All required permissions are granted, proceed with your logic
    // For example, you can access contacts and use the camera here
} else {
    // Some permissions are not granted, request them
}

Request Permissions:

When some permissions are not granted, request them using the requestPermissions method:

String[] permissions = {Manifest.permission.READ_CONTACTS, Manifest.permission.CAMERA};
int requestCode = 1;
requestPermissions(permissions, requestCode);

Handle Permission Request Results:

Override the onRequestPermissionsResult method to handle the permission request results:

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    if (requestCode == 1) {
        // Check if all permissions are granted
        boolean allPermissionsGranted = true;
        for (int result : grantResults) {
            if (result != PackageManager.PERMISSION_GRANTED) {
                allPermissionsGranted = false;
                break;
            }
        }

        if (allPermissionsGranted) {
            // All permissions are granted, proceed with your logic
        } else {
            // Some permissions are denied, handle this situation (e.g., show a message or disable functionality)
        }
    }
}

Handle "Never Ask Again":

If a user selects "Never ask again" while denying a permission, you can guide them to the app settings screen using the shouldShowRequestPermissionRationale method:

if (!shouldShowRequestPermissionRationale(Manifest.permission.READ_CONTACTS)
        || !shouldShowRequestPermissionRationale(Manifest.permission.CAMERA)) {
    // User has selected "Never ask again," show a message explaining why the permission is required and direct them to app settings
}