Dexter.withActivity(getActivity())
                .withPermissions(
                        Manifest.permission.CAMERA,
                        Manifest.permission.READ_EXTERNAL_STORAGE
                ).withListener(new MultiplePermissionsListener() {
            @Override
            public void onPermissionsChecked(MultiplePermissionsReport report) {
                if (report.areAllPermissionsGranted()) {
                    openCamera();
                } else {
                    requestMultiplePermissions();
                 }
                   }

            @Override
            public void onPermissionRationaleShouldBeShown(List<PermissionRequest> permissions, PermissionToken token) {
                token.continuePermissionRequest();
            }
        }).withErrorListener(new PermissionRequestErrorListener() {
            @Override
            public void onError(DexterError error) {
                int y = 0; 
            }
        }).check();