Email validation in ANDROID.

This is a simple example showing email validation in ANDROID.
This example uses regex for email validation.
Create a button and an edittext in your main.xml file and try this code.

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package com.coderzheaven;   import java.util.regex.Pattern; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.view.Window; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; import android.widget.Toast;   public class EmailValidationDemo extends Activity   {       EditText TF;     public Button checkButton;       public final Pattern EMAIL_ADDRESS_PATTERN = Pattern.compile(               "[a-zA-Z0-9+._%-+]{1,256}" +               "@" +               "[a-zA-Z0-9][a-zA-Z0-9-]{0,64}" +               "(" +               "." +               "[a-zA-Z0-9][a-zA-Z0-9-]{0,25}" +               ")+"           );      @Override      public void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         requestWindowFeature(Window.FEATURE_NO_TITLE);         setContentView(R.layout.main);          TF=(EditText) findViewById(R.id.TF);        checkButton=(Button) findViewById(R.id.checkButton);           checkButton.setOnClickListener(new OnClickListener() {         public void onClick(View v) {                String email=TF.getText().toString();                if(checkEmail(email))                   Toast.makeText(EmailValidationDemo.this,"Valid Email Addresss", Toast.LENGTH_SHORT).show();                else                   Toast.makeText(EmailValidationDemo.this,"Invalid Email Addresss", Toast.LENGTH_SHORT).show();         }         });     }     private boolean checkEmail(String email) {         return EMAIL_ADDRESS_PATTERN.matcher(email).matches();     } }