Edit Text Validations In
ANDROID:
Create Android Application:
- File >> New >> Android Application
- Enter Project name: EditTextValidationApp
- Package: com.ambilpursunil.newapp
- Keep other default selections, click Next until you reach Finish
1.Simply Copy and Past the Code which is display below in the MainActivity.java
package com.ambilpursunil.newapp;
import android.app.Activity;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class MainActivity extends Activity {
private
EditText etNormalText;
private
EditText etEmailText;
private
EditText etPhoneNumber;
private Button btnSubmit;
@Override
protected void onCreate(Bundle
savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
registerViews();
}
private void registerViews() {
etNormalText =
(EditText) findViewById(R.id.et_Normal);
etNormalText.addTextChangedListener(new TextWatcher() {
@Override
public void afterTextChanged(Editable s) {
Validation.hasText(etNormalText);
}
@Override
public void onTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void beforeTextChanged(CharSequence
s, int start, int before,int count) {
}
});
etEmailText =
(EditText) findViewById(R.id.et_Email);
etEmailText.addTextChangedListener(new TextWatcher() {
@Override
public void afterTextChanged(Editable s) {
Validation.isEmailCheck(etEmailText, true);
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
@Override
public void beforeTextChanged(CharSequence
s, int start, int count,
int after) {
}
});
etPhoneNumber =
(EditText) findViewById(R.id.et_Phone);
etPhoneNumber.addTextChangedListener(new TextWatcher() {
@Override
public void afterTextChanged(Editable s) {
Validation.isPhoneNumber(etPhoneNumber, false);
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
@Override
public void beforeTextChanged(CharSequence
s, int start, int count,
int after) {
}
});
btnSubmit =
(Button) findViewById(R.id.btn_Submit);
btnSubmit.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
/*Validation class will check the
error and display the error on respective fields
but it won't resist the form
submission, so we need to check again before submit
*/
if(checkValidation())
submitForm();
else
Toast.makeText(MainActivity.this, "No
Data Return Yet", Toast.LENGTH_LONG).show();
}
private void submitForm() {
Toast.makeText(MainActivity.this, "Submitting
form...", Toast.LENGTH_LONG).show();
}
private boolean checkValidation() {
boolean ret = true;
if(Validation.hasText(etNormalText)) ret =
false;
if(Validation.isEmailCheck(etEmailText, true)) ret = false;
if(Validation.isPhoneNumber(etPhoneNumber, true)) ret = false;
return ret;
}
});
}
}
2.Create a Java Class by Src=>package=>New=>Java Class Validation.java Copy and Past the Code which is display below.
package com.ambilpursunil.newapp;
import java.util.regex.Pattern;
import android.widget.EditText;
public class Validation {
// Regular Expression
// you can change the
expression based on your need
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 PHONE_REGEX = "\\d{3}-\\d{7}";
//Error Message
private static final String EMAIL_MSG = "invalid
mail";
private static final String REQUIRED_MSG = "required";
private static final String PHONE_MSG = "###-#######";
//calling this method for
E-mail
public static boolean isEmailCheck(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);
}
private static boolean isValid(EditText editText,
String regex,
String errMsg, boolean required) {
String text = editText.getText().toString().trim();
//clearing the error,if data is previously set
editText.setError(null);
// text required and editText is blank, so return
false
if(required
&& !hasText(editText))
return false;
//if pattern does not match then return false
if(required
&& !Pattern.matches(regex, text)){
editText.setError(null);
return false;
};
return true;
}
public static boolean hasText(EditText editText) {
String text =
editText.getText().toString().trim();
editText.setError(null);
//Length zero mean there is
no text
if(text.length() == 0){
editText.setError(REQUIRED_MSG);
return false;
}
return true;
}
}
3.Simple Copy and Past the below code: actvitiy_main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<EditText
android:id="@+id/et_Normal"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:hint="Enter Normal Text"
android:textStyle="bold"
android:textSize="20dp"
/>
<EditText
android:id="@+id/et_Email"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:hint="Enter Email Text"
android:textStyle="bold"
android:textSize="20dp"
/>
<EditText
android:id="@+id/et_Phone"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:hint="Enter Email Text"
android:textStyle="bold"
android:textSize="20dp"
android:inputType="number"
/>
<Button
android:id="@+id/btn_Submit"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Submit" />
</LinearLayout>
4.Copy and past the code for manifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.ambilpursunil.newapp"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="21" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
5.Right click on the project and Run As-->Android Application
OutPut:
When our application launch it will display the 3 edit texts enter the data and verify.
Please Send Your Comments To ambilpura.sunil@gmail.com
Stay Tune For Next Tutorial... Toast Validations In Android:
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