Tutorial

public boolean isNetworkAvailable() {
 Context context = getApplicationContext();
 ConnectivityManager connectivity = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
 if (connectivity == null) {
 //boitealerte(this.getString(R.string.alert),"getSystemService rend null");
 return false;
 } else {
 NetworkInfo[] info = connectivity.getAllNetworkInfo();
 if (info != null) {
 for (int i = 0; i < info.length; i++) {
 if (info[i].getState() == NetworkInfo.State.CONNECTED) {
 return true;
 }
 }
 }
 }
 return false;
 }//isNetworkAvailable