Android Internet Connectivity Check Problem

Android Internet connectivity check better method

Try this:

It's really simple and fast:

public boolean isInternetAvailable(String address, int port, int timeoutMs) {
    try {
        Socket sock = new Socket();
        SocketAddress sockaddr = new InetSocketAddress(address, port);

        sock.connect(sockaddr, timeoutMs); // This will block no more than timeoutMs
        sock.close();

        return true;

    } catch (IOException e) { return false; }
}

Then wherever you want to check just use this:

if (isInternetAvailable("8.8.8.8", 53, 1000)) {
     // Internet available, do something
} else {
     // Internet not available
}

Android internet connectivity check problem

If the crash is directly on your line:

return cm.getActiveNetworkInfo().isConnectedOrConnecting();

then that means getActiveNetworkInfo() returned null, because there is no active network -- in that case, your isConnected() method should return false.

check for poor internet connectivity android studio

You need to define what slow network means. I will assume that by the slow network you mean 2G and 3G networks. In that case, you can use subType of NetworkInfo class to identify which type of network the user is currently in and perform the appropriate action.

For example, let say you decided that 2G is slow, you can identify the 2G network as follows

NetworkInfo network = connectivity.getActiveNetworkInfo();
int netSubType = network.getSubtypeName();
if(netSubType == TelephonyManager.NETWORK_TYPE_GPRS ||
    netSubType == TelephonyManager.NETWORK_TYPE_EDGE ||
    netSubType == TelephonyManager.NETWORK_TYPE_1xRTT) {
  //user is in slow network
}

See TelephonyManager class for more such constant values.

Android check internet connection

This method checks whether mobile is connected to internet and returns true if connected:

private boolean isNetworkConnected() {
    ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);

    return cm.getActiveNetworkInfo() != null && cm.getActiveNetworkInfo().isConnected();
}

in manifest,

<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

Edit:
This method actually checks if device is connected to internet(There is a possibility it's connected to a network but not to internet).

public boolean isInternetAvailable() {
    try {
        InetAddress ipAddr = InetAddress.getByName("google.com"); 
        //You can replace it with your name
            return !ipAddr.equals("");

        } catch (Exception e) {
            return false;
    }
}

Check internet connectivity android in kotlin

Call the AsyncTask this way, it should work. You don't need to change anything in your InternetCheck AsyncTask. Basically you need to pass in an object that implements the Consumer interface that's defined in the InternetCheck class.

InternetCheck(object : InternetCheck.Consumer {
    override fun accept(internet: Boolean?) {
        Log.d("test", "asdasdas")
    }
})

How to test for active internet connection in android

Follow below code to check properly Internet is available or not as well as active or not.

   //I have taken dummy icon from server, so it may be removed in future. So you can place one small icon on server and then access your own URL.

1. Specify Permission in manifest file, also make sure for marshmellwo runtime permission handle. As I am not going to show reuntime permission here.

    <uses-permission android:name="android.permission.INTERNET"/>

2. Check for Internet Availibility and the State as Active or Inactive.

        public class InternetDemo extends Activity
        {
            @Override
            protected void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
                setContentView(R.layout.activity_main);

                checkInternetAvailibility();
            }

            public void checkInternetAvailibility()
            {
                if(isInternetAvailable())
                {
                    new IsInternetActive().execute();
                }
                else {
                    Toast.makeText(getApplicationContext(), "Internet Not Connected", Toast.LENGTH_LONG).show();
                }
            }

            public boolean isInternetAvailable() {
                try {
                    ConnectivityManager connectivityManager
                            = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
                    NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
                    return activeNetworkInfo != null && activeNetworkInfo.isConnected();
                } catch (Exception e) {

                    Log.e("isInternetAvailable:",e.toString());
                    return false;
                }
            }

            class IsInternetActive extends AsyncTask<Void, Void, String>
            {
                InputStream is = null;
                String json = "Fail";

                @Override
                protected String doInBackground(Void... params) {
                    try {
                        URL strUrl = new URL("http://icons.iconarchive.com/icons/designbolts/handstitch-social/24/Android-icon.png");
                        //Here I have taken one android small icon from server, you can put your own icon on server and access your URL, otherwise icon may removed from another server.

                        URLConnection connection = strUrl.openConnection();
                        connection.setDoOutput(true);
                        is =  connection.getInputStream();
                        json = "Success";

                    } catch (Exception e) {
                        e.printStackTrace();
                        json = "Fail";
                    }
                    return json;

                }

                @Override
                protected void onPostExecute(String result) {
                    if (result != null)
                    {
                       if(result.equals("Fail"))
                       {
                           Toast.makeText(getApplicationContext(), "Internet Not Active", Toast.LENGTH_LONG).show();
                       }
                       else
                       {
                           Toast.makeText(getApplicationContext(), "Internet Active " + result, Toast.LENGTH_LONG).show();
                       }
                    }
                    else
                    {
                        Toast.makeText(getApplicationContext(), "Internet Not Active", Toast.LENGTH_LONG).show();
                    }
                }

                @Override
                protected void onPreExecute() {
                    Toast.makeText(getBaseContext(),"Validating Internet",Toast.LENGTH_LONG).show();
                    super.onPreExecute();
                }
            }
        }

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