to check if all EditText are empty
===

I have 6 EditText fields in an xml.. on Button click I need to validate whether all EditText have values or it is empty. 
Currently I am check each EditText one by one.. How can I check all at once.

the Code 

    private Button BtnSave;
	 EditText ev_last_name,ev_first_name,ev_email,ev_password,ev_confirm_password,ev_phone;
	 String last_name,first_name,email,password,confirm_password,phone;
	 
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		setContentView(R.layout.signup);
		BtnSave=(Button) findViewById(R.id.BtnSave);
		ev_last_name=(EditText)findViewById(R.id.edit_lname);
		ev_first_name=(EditText)findViewById(R.id.edit_fname);
		ev_email=(EditText)findViewById(R.id.edit_email);
		ev_password=(EditText)findViewById(R.id.edit_passwd);
		ev_confirm_password=(EditText)findViewById(R.id.edit_cpasswd);
		ev_phone=(EditText)findViewById(R.id.edit_phone);
		
		
		
		BtnSave.setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				 last_name=ev_last_name.getText().toString();
				 first_name=ev_first_name.getText().toString();
				 email=ev_email.getText().toString();
				 password=ev_password.getText().toString();
				 confirm_password=ev_confirm_password.getText().toString();
				 phone=ev_phone.getText().toString();
				 
				 if ((ev_last_name.getText().toString().length() <= 0))
				 {
					 System.out.println(" The EditText is empty");
					 //I will use the toast later
				 }
			
				
			}
		});
		
		
	}