Season 2 Class 222 - Check Internet Connectivity

 btn.setOnClickListener(new View.OnClickListener() {

    @Override
    public void onClick(View v) {

        ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();

        if (networkInfo!=null && networkInfo.isConnected()){
            new AlertDialog.Builder(MainActivity.this)
                    .setTitle("Network is connected")
                    .setPositiveButton("Okay", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {

                        }
                    })
                    .show()
            ;
        }
     else{
         new AlertDialog.Builder(MainActivity.this)

                 .setTitle("Internet is not connected")
                 .setNegativeButton("Try again", new DialogInterface.OnClickListener() {
                     @Override
                     public void onClick(DialogInterface dialog, int which) {

                     }
                 })
                 .show();
        }

    }
});