CoderzHeaven

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.

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();
    }
}

Check this link to find how you can send email from android programatically.
Please leave your valuable comments……