How to show pop dialogue if Internet connection is not available by broadCast reciver

//create Check interNet connetion class to check internt is available or not

 public class CheckConnectionNetwork {

    public static boolean isInternetAvailable(Context context)
    {
        ConnectivityManager connectivityManager=(ConnectivityManager)
                context.getSystemService(Context.CONNECTIVITY_SERVICE);
        if(connectivityManager!=null)
        {
            NetworkInfo[] networkInfo=connectivityManager.getAllNetworkInfo();
            if(networkInfo!=null)
            {
                for(int i=0;i<networkInfo.length;i++)
                {
                    if(networkInfo[i].getState()==NetworkInfo.State.CONNECTED)
                    {
                        return true;
                    }
                }
            }
        }

        return false;
    }
}

create broadcast receiver to show pop

public class NetworkBroadcast extends BroadcastReceiver {
    private   AlertDialog dialog;

    @Override
    public void onReceive(Context context, Intent intent) {
        if(!CheckConnectionNetwork.isInternetAvailable(context))
        {
            AlertDialog.Builder builder=new AlertDialog.Builder(context);
            View view= LayoutInflater.from(context).inflate(R.layout.network_dialog,null);
            builder.setView(view);
            TextView retry=view.findViewById(R.id.retry);


            dialog=builder.create();
            dialog.getWindow().setGravity(Gravity.CENTER);
            dialog.getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
            dialog.show();
            dialog.setCancelable(false);
            retry.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    dialog.dismiss();
                    onReceive(context,intent);
                }
            });
        }
        else if(CheckConnectionNetwork.isInternetAvailable(context))
        {
            if(dialog!=null)
            {
                dialog.dismiss();
            }
        }

    }
}
Register ur broadcst in MainActivity also u can register anywhere accor to yue need

private NetworkBroadcast mBroadcast=new NetworkBroadcast();
@Override
protected void onStart() {


    IntentFilter filter=new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION);
    registerReceiver(mBroadcast,filter);
    super.onStart();
}

@Override
protected void onStop() {
    unregisterReceiver(mBroadcast);
    super.onStop();
}