FieldsValidator.java

package com.utils;

import android.content.Context;
import android.text.TextUtils;
import android.util.Patterns;
import android.widget.EditText;

/**
 * Created by darshan on 2/4/15.
 */
public class FieldsValidator {

    public static void showValidationMessage(String message, EditText editText, Context context) {

        if(editText != null) {

            //editText.setError(message);
            editText.requestFocus();
        }

        Notify.toast(message, context);

    }

    public static boolean validateUsername(EditText editText) {

        Context context = editText.getContext();

        String emptyField = context.getString(R.string.empty_username);
        String invalidField = context.getString(R.string.invalid_username);

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

        if(TextUtils.isEmpty(text)) {

            showValidationMessage(emptyField, editText, context);

            return false;

        } /*else if(isValidEmail(text)) {

            showValidationMessage(invalidField, editText, context);

            return false;
        }*/

        return true;
    }


    public static boolean validatePassword(EditText editText) {

        Context context = editText.getContext();

        String emptyField = context.getString(R.string.empty_password);
        String invalidField = context.getString(R.string.invalid_password);

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

        if(TextUtils.isEmpty(text)) {

            showValidationMessage(emptyField, editText, context);

            return false;

        } /*else if(isValidEmail(text)) {

            showValidationMessage(invalidField, editText, context);

            return false;
        }*/

        return true;
    }

    public static boolean validateEmail(EditText editText) {

        Context context = editText.getContext();

        String emptyField = context.getString(R.string.empty_email);
        String invalidField = context.getString(R.string.invalid_email);

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

        if(TextUtils.isEmpty(text)) {

            showValidationMessage(emptyField, editText, context);

            return false;

        } else if(isValidEmail(text)) {

            showValidationMessage(invalidField, editText, context);

            return false;
        }

        return true;
    }


    public static boolean isValidPhoneNumber(CharSequence target) {

        if(target == null || TextUtils.isEmpty(target)) {

            return false;

        } else {

            return Patterns.PHONE.matcher(target).matches();
        }
    }

    public static boolean isValidEmail(CharSequence target) {

        if(target == null || TextUtils.isEmpty(target)) {

            return false;

        } else {

            return Patterns.EMAIL_ADDRESS.matcher(target).matches();
        }
    }

}