title: Regex in android for email,username & mobile number
body: <p>I want to use regex in my android application to validate some field.</p>
  <h3>User Name :</h3>
  <blockquote>
  <p><code>1</code> Capital Letter[A-Z], <code>2</code> digit[0-9], <code>1</code> Special Character any and then followed by small character[a-z] and lenth would be <code>10</code> character max.</p>
  </blockquote>
  <h3>Email Address :</h3>
  <blockquote>
  <p>Must contain @google.com in last</p>
  </blockquote>
  <h3>Mobile :</h3>
  <blockquote>
  <p>Must be +91 and after that 10 digit.</p>
  </blockquote>
  <p>How can I form my regex pattern for all three fields..?</p>