Android Service to Check Internet Connectivity

Android service to check internet connectivity?

Services are designed for long backgroud running task.
You should use a BroadcastReceiver:

This is a sample method I use to monitor the network state into my main Activity:

private void installListener() {

        if (broadcastReceiver == null) {

            broadcastReceiver = new BroadcastReceiver() {

                @Override
                public void onReceive(Context context, Intent intent) {

                    Bundle extras = intent.getExtras();

                    NetworkInfo info = (NetworkInfo) extras
                            .getParcelable("networkInfo");

                    State state = info.getState();
                    Log.d("InternalBroadcastReceiver", info.toString() + " "
                            + state.toString());

                    if (state == State.CONNECTED) {

                        onNetworkUp();

                    } else {

                        onNetworkDown();

                    }

                }
            };

            final IntentFilter intentFilter = new IntentFilter();
            intentFilter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
            registerReceiver(broadcastReceiver, intentFilter);
        }
    }

Remember to call unregisterReceiver when the onDestroy event occurs

Hope this help.

Checking internet connection with service on android

You might need to use broadcast receiver. You will continuously receive updates in connectivity.(Connected/Disconnected)

Example:

Manifest:

Permissions:

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

Register broadcast receiver:

<receiver android:name=".ConnectivityChangeReceiver" >
    <intent-filter>
        <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
    </intent-filter>
</receiver>

Create receiver class:

public class ConnectivityChangeReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {

        // Explicitly specify that which service class will handle the intent.
        ComponentName comp = new ComponentName(context.getPackageName(),
                YourService.class.getName());
        intent.putExtra("isNetworkConnected",isConnected(context));
        startService(context, (intent.setComponent(comp)));
    }

 public  boolean isConnected(Context context) {
           ConnectivityManager connectivityManager = ((ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE));
           NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();
           return networkInfo != null && networkInfo.isAvailable() && networkInfo.isConnected();
   }

}

Your service class:

class YourService extends IntentService{

    @Override
    protected void onHandleIntent(Intent intent) {
      Bundle extras = intent.getExtras();
      boolean isNetworkConnected = extras.getBoolean("isNetworkConnected");
      // your code

   }

}

check internet connection in background service every 30 min

A few things:

1. Subclass IntentService instead of Service. Services run on the main (UI) thread, but an IntentService will do its work in a background thread (in onHandleIntent()), and it automatically stops itself after finishing its work.
2. In your service, use AlarmManager to schedule your next "wakeup" in 30 minutes. You can find numerous examples how to use AlarmManager all over the web.
3. You may need a way to schedule the first "wakeup" of your service after the device boots. For this you'll need a BroadcastReceiver in your manifest that is registered to receive the ACTION_BOOT_COMPLETED broadcast. This requires you to have the RECEIVE_BOOT_COMPLETED permission. Examples of this are all over the web as well.

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();
                }
            }
        }

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")
    }
})

android - Service need internet connection

Use a Sync Adapter. It will sync your data in the background at opportune moments to prevent unnecessary battery drain and service charges.

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;
    }
}

Detect whether there is an Internet connection available on Android

The getActiveNetworkInfo() method of ConnectivityManager returns a NetworkInfo instance representing the first connected network interface it can find or null if none of the interfaces are connected. Checking if this method returns null should be enough to tell if an internet connection is available or not.

private boolean isNetworkAvailable() {
    ConnectivityManager connectivityManager 
          = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo activeNetworkInfo = connectivityManager != null ? connectivityManager.getActiveNetworkInfo() : null;
    return activeNetworkInfo != null && activeNetworkInfo.isConnected();
}

You will also need:

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

in your android manifest.

Edit:

Note that having an active network interface doesn't guarantee that a particular networked service is available. Network issues, server downtime, low signal, captive portals, content filters and the like can all prevent your app from reaching a server. For instance you can't tell for sure if your app can reach Twitter until you receive a valid response from the Twitter service.

How to check currently internet connection is available or not in android

This will tell if you're connected to a network:

ConnectivityManager connectivityManager = (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
        
boolean connected = (connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).getState() == NetworkInfo.State.CONNECTED || 
            connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI).getState() == NetworkInfo.State.CONNECTED);

Warning: If you are connected to a WiFi network that doesn't include internet access or requires browser-based authentication, connected will still be true.

You will need this permission in your manifest:

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

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