resengupta · December 19, 2017 05:33 · Dec 19, 2017 · Dec 19, 2017
diff --git a/PermissionUtils b/PermissionUtils
@@ -87,7 +87,6 @@ public final class PermissionUtils {
     /**
      * This class contains Permission Groups for each Permission type.
      */
-    @SuppressWarnings("squid:S2386")
     public static final class Permissions {
 
         public static final String[] CAMERA = {Manifest.permission.CAMERA};

diff --git a/PermissionUtils b/PermissionUtils
@@ -0,0 +1,114 @@
+/**
+ * Helper for accessing features related to Runtime Permissions introduced support library.
+ */
+public final class PermissionUtils {
+
+    private static final String ACCESS_CAMERA_TAG = "AccessCamera";
+
+    private PermissionUtils() {
+        // Hide Constructor
+    }
+
+    /**
+     * Iterate through all list of permissions and check if all permissions are granted by user.
+     *
+     * @param context     The Activity Context
+     * @param permissions The List of Permissions
+     * @return true if all permissions are granted by user. False otherwise
+     */
+    public static boolean isPermissionGranted(Context context, @NonNull String[] permissions) {
+        for (String permission : permissions) {
+            if (ContextCompat.checkSelfPermission(context, permission) !=
+                    PackageManager.PERMISSION_GRANTED) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    /**
+     * Iterate through all list of permissions and check if Rationale permission should be shown
+     *
+     * @param context     The Activity Context
+     * @param permissions The List of Permissions
+     * @return true if all permissions are granted by user. False otherwise
+     */
+    public static boolean shouldShowRequestPermissionRationale(Activity context, @NonNull String[] permissions) {
+        for (String permission : permissions) {
+            if (ActivityCompat.shouldShowRequestPermissionRationale(context, permission)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    /**
+     * Check that all given permissions have been granted by verifying that each entry in the given
+     * array is of the value {@link PackageManager#PERMISSION_GRANTED}.
+     **/
+    public static boolean verifyPermissions(@NonNull int[] grantResults) {
+        // At least one result must be checked.
+        if (grantResults.length < 1) {
+            return false;
+        }
+
+        // Verify that each required permission has been granted, otherwise return false.
+        for (int result : grantResults) {
+            if (result != PackageManager.PERMISSION_GRANTED) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    /**
+     * Display Rationale Dialog for requested permission.
+     *
+     * @param context         The Activity Context
+     * @param fragmentManager The fragmentManager
+     * @param requestCode     Request code to identify permission type
+     */
+    public static void showRationaleDialog(Context context, FragmentManager fragmentManager, int requestCode) {
+        String rationalMessage;
+        String tag;
+        if (requestCode == RequestCode.ACCESS_CAMERA) {
+            tag = ACCESS_CAMERA_TAG;
+            rationalMessage = context.getString(R.string.access_camera_message);
+
+        } else {
+            throw new IllegalArgumentException(
+                    "Permission Request Code not allowed: " + requestCode);
+        }
+        final ConfirmationDialogFragment fragment = ConfirmationDialogFragment.newInstance(
+                rationalMessage, null, RequestCode.ACCESS_CAMERA);
+        fragment.show(fragmentManager, tag);
+    }
+
+    /**
+     * This class contains Permission Groups for each Permission type.
+     */
+    @SuppressWarnings("squid:S2386")
+    public static final class Permissions {
+
+        public static final String[] CAMERA = {Manifest.permission.CAMERA};
+
+        private Permissions() {
+            // hide constructor
+        }
+    }
+
+    /**
+     * This class contains Request Code constants for all possible runtime permissions used in the
+     * application.
+     */
+    public static final class RequestCode {
+
+        public static final int ACCESS_CAMERA = 101;
+
+        private RequestCode() {
+            // hide constructor
+        }
+    }
+
+
+}
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