Apna Java

  Every Service related app we need to check network available in phone or not before call any web service. The source code is given bellow. import android.content.Context; import android.net.ConnectivityManager; import android.net.NetworkInfo; public class CheckNetworkConnection {     public static int TYPE_WIFI = 1;     public static int TYPE_MOBILE = 2;     public static int TYPE_NOT_CONNECTED = 0;     public static int getConnectivityStatus(Context context) {         ConnectivityManager cm = (ConnectivityManager) context                 .getSystemService(Context.CONNECTIVITY_SERVICE);         NetworkInfo activeNetwork = cm.getActiveNetworkInfo();         if (null != activeNetwork) {             if(activeNetwork.getType() == ConnectivityManager.TYPE_WIFI)                 return TYPE_WIFI;                         if(activeNetwork.getType() == ConnectivityManager.TYPE_MOBILE)                 return TYPE_MOBILE;         }         retur

Email id validation in front end in app is very common things in android  . Here is the code to check email id in android . import java.util.regex.Matcher; import java.util.regex.Pattern; public class EmailValidator { private Pattern pattern; private Matcher matcher; private static final String EMAIL_PATTERN = "^[_A-Za-z0-9-\\+]+(\\.[_A-Za-z0-9-]+)*@" + "[A-Za-z0-9-]+(\\.[A-Za-z0-9]+)*(\\.[A-Za-z]{2,})$"; public EmailValidator() { pattern = Pattern.compile(EMAIL_PATTERN); } public boolean validate(final String hex) { matcher = pattern.matcher(hex); return matcher.matches();   } } // for  activity  if(new EmailValidator().validate(etEmail.getText().toString())==false) {    // write code for not valid } else {   // write code for valid } Find Us :          Facebook : @apnaandroid         Google+   : Apna Java         Youtube : Android & Java

For PAN No. format validation in Java we need to write this simple code in Java class. Hope this class will help you a lot. 1.   First create a class called  PanValidator . import java.util.regex.Matcher; import java.util.regex.Pattern; public class PanValidator {     public boolean isValidPan(String pan) {         Pattern mPattern = Pattern.compile("[A-Z]{5}[0-9]{4}[A-Z]{1}");         Matcher mMatcher = mPattern.matcher(pan);         return mMatcher.matches();     } } 2.   Call is call from Activity or fragment in android   :          boolean isValidPanNo= new PanValidator().isValidPan(String strYourPanNo);    if( isValidPanNo)    {           // write your logic      }else{         // write your logic } 3.   Call this class from java class ::         Class A{           public static void main(String args[])             {                PanValidator pv=new PanValidator();                 System.out.println

Custom calendar is very important part in android . Using custom calendar we can easily customize calendar activity as per our requirements . I am describing how to create a custom calendar in android  . Its very easy to integrate in eclipse as well as studio. I hope it will help you a lot . For create a custom calendar you have to follow these bellow steps . The steps are 1.   Create a shape file  " circile_cyan.xml " in your drawable folder .        <?xml version="1.0" encoding="utf-8"?> <shape xmlns:android="http://schemas.android.com/apk/res/android"     android:shape="oval" >     <solid android:color="#00FFFF" >     </solid> </shape> 2.   Create a shape file  " circile_grey.xml " in your drawable folder . <?xml version="1.0" encoding="utf-8"?> <shape xmlns:android="http://schemas.android.com/apk/res/android"