Android之邮箱注册正则表达式

protected void Check() {

 if (USERNAME.equals("") || PASSWORD.equals("")) {

 Toast.makeText(context, "账号或密码不能为空", Toast.LENGTH_SHORT)

 .show();

 } else if (!EmailFormat(USERNAME) || USERNAME.length() > 31) {

 Toast.makeText(context, "账号不为邮箱或格式不正确", Toast.LENGTH_LONG)

 .show();

 } else if (PASSWORD.length() < 6 || PASSWORD.length() > 15) { 

 Toast.makeText(context, "密码长度应在6～15位！", Toast.LENGTH_LONG)

 .show();

 } else {

 login();

 }

 }

 private boolean EmailFormat(String eMAIL1) {//邮箱判断正则表达式

 Pattern pattern = Pattern

 .compile("\\w+([-+.]\\w+)*@\\w+([-.]\\w+)*\\.\\w+([-.]\\w+)*");

 Matcher mc = pattern.matcher(USERNAME);

 return mc.matches();

 }