title: Validating email, name phone etc in edittext field without clicking submit button in android
body: <p>I'm creating a registration form in android containing three edittexts. 1) Name 2)email 3) mobile number and finally there is a button for proceeding to next stage. Now when user inputs in name edittext, some value (such as characters or numbers), then proceeds to the next edittext email. Then I have to validate whether the name entered is valid or not. That is before starting to type in the email edittext, my app should display an error message such as invalid name in red color, below the name edittext. Also the name edittext should turn to an edittext with red color border in it. Similarly the edittexts email and mobile number has also to be validated like this. How can this feature be achieved in android?? I want to validate all edittexts before clicking the button to submit the data. Please help me..   </p>