added e-mail check utils

README.md

@@ -11,3 +11,6 @@ Just some handy static classes/methods for dealing with common Android tasks.
 * `NetUtils` - Static methods for getting/posting JSON, posting form-encoded data, opening and listening to UDP sockets.  Handles background threading on behalf of the user, while providing listeners/callbacks that will execute user-provided code on the main thread.  Also contains some helper methods for URL encoding, checking conenctivity status on the device and generating random Strings (as non-unique IDs for Http logs etc.).
 
 * `SharedPrefsUtils` - Static methods for reading & writing to & from `SharedPreferences`. Methods are provided for each type that can be read/written, and just obfuscates some of the boiler-plate associated with `SharedPreferences`. Only uses __Default__ `SharedPreferences` at the current point in time.
+
+* `EmailUtils` - A helper class that can be used to authenticate emails during user login or sign-up.
+

src/com/esri/android/util/EmailUtils.java

@@ -0,0 +1,24 @@
+package com.esri.android.util;
+
+/**
+ * A pack of helpful Email utility methods.
+ */
+
+public class Email {
+
+    /**
+     *
+     * Helper method is e-mail for check.
+     *
+     * @param target Check e-mail valid and invalid.
+     * @return true or false valid mail.
+     */
+    public static boolean isValidEmail(CharSequence target) {
+        if (target == null) {
+            return false;
+        } else {
+            return android.util.Patterns.EMAIL_ADDRESS.matcher(target).matches();
+        }
+    }
+
+}