Active Internet Connection on connected network

Question

My application activity is having a block of code which I want to check the connected network having active connection before accessing FireBase Auth Login.

I created a class for networkState add a block of code for checking networkActiveConnection

private void networkState() throws IOException {

    final ConnectivityManager conMgr = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
    assert conMgr != null;
    final NetworkInfo activeNetwork = conMgr.getActiveNetworkInfo();
    if (activeNetwork != null && activeNetwork.isConnectedOrConnecting()) {

        Toast.makeText(getApplicationContext(),"Network connected",Toast.LENGTH_SHORT).show();

        //checking active internet service

        HttpURLConnection urlc = (HttpURLConnection)(new URL("http://www.google.com").openConnection());
        urlc.setRequestProperty("User-Agent", "Test");
        urlc.setRequestProperty("Connection", "close");
        urlc.setConnectTimeout(10000);
        urlc.connect();
        if(urlc.getResponseCode() == 200){

            Toast.makeText(getApplicationContext(), "Network has active internet", Toast.LENGTH_SHORT).show();

            //user login

            signInUser();

        }else {

            Toast.makeText(getApplicationContext(), "No active internet connection", Toast.LENGTH_SHORT).show();
        }

        //end of checking active internet service

    } else {

        Toast.makeText(getApplicationContext(),"Network not connected",Toast.LENGTH_SHORT).show();

    }
}

Application keeps crashing. I cant move without the solution.Where I missed? Is there any other method to check the connected network having active connection?

Possible duplicate of [Check for Active internet connection Android](https://stackoverflow.com/questions/17717749/check-for-active-internet-connection-android) — , May 24 '18 at 20:13
Check this answer https://stackoverflow.com/a/40576794/9611523 Found to be working after searching for an hour — , May 24 '18 at 20:14
I verified this answers and modified my code. Please revice my codes — Dipin K G, May 25 '18 at 05:24

score 0 · Accepted Answer · answered Jun 05 '18 at 06:09

Finally I found an answer.Its actually happening due to the version. Up to Android 3.0 and above all long process activities will work at only AsyncTask

I restructured the actual internet connection in the device by load checking of Google.com. I don't know what it will happen when google.com is down.

The following code may help.

@SuppressLint("StaticFieldLeak")
public class activeConnection extends AsyncTask<Void, Void, Boolean> {

    @Override
    protected Boolean doInBackground(Void... params) {

        try {
            URL url = new URL("http://www.google.com");
            HttpURLConnection urlc = (HttpURLConnection) url.openConnection();
            urlc.setConnectTimeout(3000);
            urlc.connect();
            if (urlc.getResponseCode() == 200) {
                return true;
            }
        } catch (MalformedURLException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
            return false;
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            return false;
        }
        return false;
    }

    @RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN_MR1)
    @Override
    protected void onPostExecute(Boolean result) {
        if (!result) { // code if not connected

            AlertDialog.Builder builder = new AlertDialog.Builder(Customers.this, R.style.MyDialogTheme);
            builder.setTitle("ALERT");
            builder.setMessage("Activate your Internet connection and Try again");
            builder.setCancelable(false);

            builder.setPositiveButton(
                    "Retry",
                    new DialogInterface.OnClickListener() {
                        public void onClick(DialogInterface dialog, int id) {
                            dialog.cancel();
                            new activeConnection().execute();
                        }
                    });


            AlertDialog alert11 = builder.create();
            alert11.show();
        } else { // code if connected


        }
    }
}

Active Internet Connection on connected network

1 Answers1