仅当字段不为空时才进行电子邮件验证
Posted
技术标签:
【中文标题】仅当字段不为空时才进行电子邮件验证【英文标题】：Email validation only if field is non empty 【发布时间】：2016-11-26 04:36:17 【问题描述】：根据我的选择，此代码适用于用户名和手机号码，但不适用于电子邮件验证。 注意我只想检查电子邮件它是非空的。如何只检查电子邮件的验证这个字段是非空的。**记住我知道逻辑但是如何将逻辑放在这段代码中，因为 **我尝试了几种逻辑，但在电子邮件编辑文本中什么都不做。
public class Login extends BaseActivity
JSONObject jsonobject;
JSONArray jsonarray;
private ProgressDialog dialog;
ArrayList<String> arealist;
//ArrayList<GetterSetter> area;
public static final String PREFS_NAME = "MyPrefsFile";
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
Button login = (Button) findViewById(R.id.button_register);
login.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View v)
EditText user = (EditText) findViewById(R.id.editText_enter_name);
EditText mobile = (EditText) findViewById(R.id.editText_mobNo);
EditText email = (EditText) findViewById(R.id.editText_email);
// Check The Validity of empty fields
boolean Resp = validate(new EditText[]user,mobile);
// Check The Validity of emailID
boolean e_valid = isEmailValid(email.getText());
// Check The Validity of Mobile Numbers
boolean mobile_valid = isMobValid(mobile.getText());
if (Resp && mobile_valid && e_valid)
PostJson();
else
Toast.makeText(Login.this, "Field incorrect..!!!",
Toast.LENGTH_SHORT).show();
if (Resp)
String pass = mobile.getText().toString();
String e_check = email.getText().toString();
if (TextUtils.isEmpty(pass) || pass.length() < 10)
mobile.setError("Mobile number should be of 10 digits");
else if (e_check!=null || e_check.length() >=1)
email.setError("Email Address in invalid format");
Toast.makeText(Login.this,
"Email Address in invalid format",
Toast.LENGTH_SHORT).show();
// Chk Validation of mobile number
if (mobile_valid)
if (e_valid)
if (isInternetPresent)
// setting progress bar to zero
dialog = new ProgressDialog(Login.this);
dialog.setMessage("Please Wait...");
dialog.setIndeterminate(false);
dialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
dialog.setProgressNumberFormat(null);
dialog.setProgress(0);
dialog.show();
// Toast.makeText(Login.this, "Connecting....", Toast.LENGTH_LONG)
// .show();
else
Toast.makeText(Login.this, "Unable to connect the server, please check your data settings", Toast.LENGTH_LONG)
.show();
// =====To check the validation of Emails and Empty
// Fields==========//
public boolean isEmailValid(Editable email)
boolean isValid = false;
String expression = "^(([\\w-]+\\.)+[\\w-]+|([a-zA-Z]1|[\\w-]2,))@"
+ "((([0-1]?[0-9]1,2|25[0-5]|2[0-4][0-9])\\.([0-1]?"
+ "[0-9]1,2|25[0-5]|2[0-4][0-9])\\."
+ "([0-1]?[0-9]1,2|25[0-5]|2[0-4][0-9])\\.([0-1]?"
+ "[0-9]1,2|25[0-5]|2[0-4][0-9]))1|"
+ "([a-zA-Z]+[\\w-]+\\.)+[a-zA-Z]2,4)$";
CharSequence inputStr = email;
Pattern pattern = Pattern.compile(expression,
Pattern.CASE_INSENSITIVE);
Matcher matcher = pattern.matcher(inputStr);
if (matcher.matches())
isValid = true;
return isValid;
public boolean isMobValid(Editable mobile)
boolean isOk = false;
String exp = "^[0-9]10$";
CharSequence inputStr = mobile;
Pattern pattern = Pattern
.compile(exp, Pattern.CASE_INSENSITIVE);
Matcher matcher = pattern.matcher(inputStr);
if (matcher.matches())
isOk = true;
return isOk;
public boolean validate(EditText[] fields)
// TODO Auto-generated method stub
for (int i = 0; i < fields.length; i++)
EditText currentField = fields[i];
if (currentField.getText().toString().length() <= 0)
currentField.setError("This field can't be empty");
// Toast.makeText(Login.this, "Enter all the fields..!!!",
// Toast.LENGTH_SHORT).show();
return false;
return true;
);
// ==========//
// =========================== Json Object==================//
public void PostJson()
@Override
public void onFailure(Throwable e, String response)
Log.e("ERROR_LOG", "onFailure request" + e.toString());
Toast.makeText(Login.this, "Error in Connection.....",
Toast.LENGTH_SHORT).show();
@Override
public void onFinish()
// //////// onFinish body///////////////////////////////
super.onFinish();
// ////////////////////////////////////////////////////////
);
【问题讨论】：
检查我编辑的答案.. 【参考方案1】：为了验证电子邮件 ID，请使用 android 的默认电子邮件数学器。
android.util.Patterns.EMAIL_ADDRESS.matcher(your data).matches();
例如。
if (etMail.getText().toString().trim().equals(""))
Toast.makeText(getApplicationContext(),
"Please enter your e-mail id", Toast.LENGTH_SHORT)
.show();
else if (!android.util.Patterns.EMAIL_ADDRESS.matcher(
etMail.getText().toString().trim()).matches())
Toast.makeText(getApplicationContext(),
"Please enter valid e-mail id", Toast.LENGTH_SHORT)
.show();
else
// Do your stuff
编辑：
if (user.getText().toString().trim().equals(""))
Toast.makeText(getApplicationContext(),
"Please enter username", Toast.LENGTH_SHORT)
.show();
else if (mobile.getText().toString().trim().equals(""))
Toast.makeText(getApplicationContext(),
"Please enter your mobile number", Toast.LENGTH_SHORT)
.show();
else if (mobile.getText().length() < 10)
Toast.makeText(getApplicationContext(),
"Please enter valid mobile number", Toast.LENGTH_SHORT)
.show();
else if (!etMail.getText().toString().trim().equals(""))
if (!android.util.Patterns.EMAIL_ADDRESS.matcher(
etMail.getText().toString().trim()).matches())
Toast.makeText(getApplicationContext(),
"Please enter valid e-mail id", Toast.LENGTH_SHORT)
.show();
else
// Do your stuff
快乐编码..
【讨论】：
如何输入上面的代码，因为我尝试了这个逻辑，但在我的代码中不起作用 您的代码有点复杂，您要多次检查相同的验证。在我的代码中的 else 部分中发布您的 json。 您希望您的验证结果如何？ 一共有三个字段a)name,b)mobileNo,c)email 姓名和手机号不能为空，手机号必须是10位数字，只有在非空时才检查电子邮件验证。【参考方案2】：我已经编辑了你的课程。希望现在可以使用。
public class Login extends BaseActivity
JSONObject jsonobject;
JSONArray jsonarray;
private ProgressDialog dialog;
ArrayList<String> arealist;
//ArrayList<GetterSetter> area;
public static final String PREFS_NAME = "MyPrefsFile";
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
Button login = (Button) findViewById(R.id.button_register);
login.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View v)
EditText user = (EditText) findViewById(R.id.editText_enter_name);
EditText mobile = (EditText) findViewById(R.id.editText_mobNo);
EditText email = (EditText) findViewById(R.id.editText_email);
if (user.getText().toString().trim().equals(""))
Toast.makeText(getApplicationContext(),
"Please enter username", Toast.LENGTH_SHORT)
.show();
else if (mobile.getText().toString().trim().equals(""))
Toast.makeText(getApplicationContext(),
"Please enter your mobile number", Toast.LENGTH_SHORT)
.show();
else if (mobile.getText().length() < 10)
Toast.makeText(getApplicationContext(),
"Please enter valid mobile number", Toast.LENGTH_SHORT)
.show();
else if (!email.getText().toString().trim().equals(""))
if (!android.util.Patterns.EMAIL_ADDRESS.matcher(
email.getText().toString().trim()).matches())
Toast.makeText(getApplicationContext(),
"Please enter valid e-mail id", Toast.LENGTH_SHORT)
.show();
else
// Do your stuff
PostJson();
if (isInternetPresent)
// setting progress bar to zero
dialog = new ProgressDialog(Login.this);
dialog.setMessage("Please Wait...");
dialog.setIndeterminate(false);
dialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
dialog.setProgressNumberFormat(null);
dialog.setProgress(0);
dialog.show();
// Toast.makeText(Login.this, "Connecting....", Toast.LENGTH_LONG)
// .show();
else
Toast.makeText(Login.this, "Unable to connect the server, please check your data settings", Toast.LENGTH_LONG)
.show();
// =====To check the validation of Emails and Empty
// Fields==========//
public boolean isEmailValid(Editable email)
boolean isValid = false;
String expression = "^(([\\w-]+\\.)+[\\w-]+|([a-zA-Z]1|[\\w-]2,))@"
+ "((([0-1]?[0-9]1,2|25[0-5]|2[0-4][0-9])\\.([0-1]?"
+ "[0-9]1,2|25[0-5]|2[0-4][0-9])\\."
+ "([0-1]?[0-9]1,2|25[0-5]|2[0-4][0-9])\\.([0-1]?"
+ "[0-9]1,2|25[0-5]|2[0-4][0-9]))1|"
+ "([a-zA-Z]+[\\w-]+\\.)+[a-zA-Z]2,4)$";
CharSequence inputStr = email;
Pattern pattern = Pattern.compile(expression,
Pattern.CASE_INSENSITIVE);
Matcher matcher = pattern.matcher(inputStr);
if (matcher.matches())
isValid = true;
return isValid;
public boolean isMobValid(Editable mobile)
boolean isOk = false;
String exp = "^[0-9]10$";
CharSequence inputStr = mobile;
Pattern pattern = Pattern
.compile(exp, Pattern.CASE_INSENSITIVE);
Matcher matcher = pattern.matcher(inputStr);
if (matcher.matches())
isOk = true;
return isOk;
public boolean validate(EditText[] fields)
// TODO Auto-generated method stub
for (int i = 0; i < fields.length; i++)
EditText currentField = fields[i];
if (currentField.getText().toString().length() <= 0)
currentField.setError("This field can't be empty");
// Toast.makeText(Login.this, "Enter all the fields..!!!",
// Toast.LENGTH_SHORT).show();
return false;
return true;
);
// ==========//
// =========================== Json Object==================//
public void PostJson()
@Override
public void onFailure(Throwable e, String response)
Log.e("ERROR_LOG", "onFailure request" + e.toString());
Toast.makeText(Login.this, "Error in Connection.....",
Toast.LENGTH_SHORT).show();
@Override
public void onFinish()
// //////// onFinish body///////////////////////////////
super.onFinish();
// ////////////////////////////////////////////////////////
);
【讨论】：
如何输入上面的代码，因为我尝试了这个逻辑，但在我的代码中不起作用 输入完整有效的电子邮件地址后出现一些问题，post json 不起作用 没有什么可以阻止postjson方法的调用..我确定那个方法会有错误。请检查【参考方案3】：你需要检查这个：
if (email.getText().toString().equalsIgnoreCase(""))
// email is empty
else
//email is not empty
【讨论】：
如何输入上面的代码，因为我尝试了这个逻辑，但在我的代码中不起作用。以上是关于仅当字段不为空时才进行电子邮件验证的主要内容，如果未能解决你的问题，请参考以下文章