EditText Validation

main.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="vertical" >

    <EditText

        android:id="@+id/edtName"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_margin="3dp"

        android:ems="10"

        android:hint="@string/Name" />

  

    <EditText

        android:id="@+id/edtEmail"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_margin="3dp"

        android:ems="10"

        android:hint="@string/EmailID"

        android:inputType="textEmailAddress"

        android:maxLength="49" />

    <EditText

        android:id="@+id/edtMobile"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_margin="3dp"

        android:ems="10"

        android:hint="@string/MobileNumber"

        android:inputType="phone"

        android:maxLength="14" />

    <Button

        android:id="@+id/btnCheckValidation"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="@string/CheckValidation" />

</LinearLayout>

Validation.java

import java.util.regex.Pattern;

import android.text.TextUtils;

import android.widget.EditText;

public class Validation {

               private static final String EMAIL_MSG = "Invalid Email";

               private static final String EMAIL_REGEX = "^[_A-Za-z0-9-\\+]+(\\.[_A-Za-z0-9-]+)*@[A-Za-z0-9-]+(\\.[A-Za-z0-9]+)*(\\.[A-Za-z]{2,})$";

               private static final String REQUIRED_MSG = "This field is required";

               private static final String PHONE_REGEX = "^[0-9]{10}$";

               private static final String PHONE_MSG = "10 digit number required";

               public static boolean isEmailAddress(EditText editText, boolean required) {

                              return isValid(editText, EMAIL_REGEX, EMAIL_MSG, required);

               }

               public static boolean isPhoneNumber(EditText editText, boolean required) {

                              return isValid(editText, PHONE_REGEX, PHONE_MSG, required);

               }

               public static boolean isValid(EditText editText, String regex,

                                             String errMsg, boolean required) {

                              String text = editText.getText().toString().trim();

                              editText.setError(null);

                              if (required && !hasText(editText))

                                             return false;

                              if (required && !Pattern.matches(regex, text)) {

                                             editText.setError(errMsg);

                                             return false;

                              }

                              ;

                              return true;

               }

               public static boolean hasText(EditText editText) {

                              String text = editText.getText().toString().trim();

                              editText.setError(null);

                              if (text.length() == 0) {

                                             editText.setError(REQUIRED_MSG);

                                             return false;

                              }

                              return true;

               }

               public static boolean validateForNull(EditText p_editText, String p_nullMsg) {

                              boolean m_isValid = false;

                              try {

                                             if (p_editText != null && p_nullMsg != null) {

                                                            if (TextUtils.isEmpty(p_editText.getText().toString().trim())) {

                                                                           p_editText.setError(p_nullMsg);

                                                                           m_isValid = false;

                                                            } else {

                                                                           m_isValid = true;

                                                            }

                                             }

                              } catch (Throwable p_e) {

                                             p_e.printStackTrace();

                              }

                              return m_isValid;

               }

}

MainActivity.java

  

public class MainActivity extends Activity {

               private EditText edtName, edtEmail, edtMobile;

               private Button btnCheckValidation;

               @Override

               protected void onCreate(Bundle savedInstanceState) {

                              super.onCreate(savedInstanceState);

                              setContentView(R.layout.main);

                              edtName = (EditText) findViewById(R.id.edtName);

                              edtEmail = (EditText) findViewById(R.id.edtEmail);

                              edtMobile = (EditText) findViewById(R.id.edtMobile);

                              btnCheckValidation = (Button) findViewById(R.id.btnCheckValidation);

                              btnCheckValidation.setOnClickListener(new OnClickListener() {

                                             @Override

                                             public void onClick(View v) {

                                                            if (checkNullValidation()) {

                                                                           if (checkValidation()) {

                                                                                          Toast.makeText(getApplicationContext(), "True",

                                                                                                                        Toast.LENGTH_SHORT).show();

                                                                           }

                                                            }

                                             }

                              });

               }

               private boolean checkNullValidation() {

                              boolean isValid = true;

                              if (!Validation.validateForNull(edtName, "Name is required")) {

                                             isValid = false;

                              }

                              if (!Validation.validateForNull(edtEmail, "Email Id is required")) {

                                             isValid = false;

                              }

                              if (!Validation.validateForNull(edtMobile, "Mobile No. is required")) {

                                             isValid = false;

                              }

                              return isValid;

               }

               private boolean checkValidation() {

                              boolean isValid = true;

                              if (!Validation.isEmailAddress(edtEmail, true))

                                             isValid = false;

                              if (!Validation.isPhoneNumber(edtMobile, true))

                                             isValid = false;

                              return isValid;

               }

}