Android Detect Internet Connection Status

Android Detect Internet Connection Status

Android how Detecting internet connection status in your app. This is very easy . In this article you will learn how to detect internet connection  in android app status manually and automatically. Using broadcast receiver, your app will be automatically notified when there is a change in network connection.

Creating New Project:-

Step 1 : First one to  Start Android Studio

Step 2 :  Seconds step to Create a New Project Project Click On  ==> File  ==> NEW ==> New Project.When it prompts you to select the default activity, select Empty  Activity and proceed.

Step 3:  Create a class name AppStatus.java and extend it from BroadcastReceiver. This is a receiver class which will be notified whenever there is change in network / internet connection. Open your java file and copy paste the code

public class AppStatus {
    private static AppStatus instance = new AppStatus();
    static Context context;
    ConnectivityManager connectivityManager;
    NetworkInfo wifiInfo, mobileInfo;
    boolean connected = false;

    public static AppStatus getInstance(Context ctx) {
        context = ctx.getApplicationContext();
        return instance;
    }

    public boolean isOnline() {
        try {
            connectivityManager = (ConnectivityManager) context
                    .getSystemService(Context.CONNECTIVITY_SERVICE);

            NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();
            connected = networkInfo != null && networkInfo.isAvailable() &&
                    networkInfo.isConnected();
            return connected;


        } catch (Exception e) {
            System.out.println("CheckConnectivity Exception: " + e.getMessage());
            Log.v("connectivity", e.toString());
        }
        return connected;

    }
}

 

Step 5:  Create another Activity  name MainActivity.java and extend it from Application. This class will be called whenever app is launched. Here AppStatus.getInstance.

Step 6:  Add this code in onCreate whree you check Internet connection.

if (AppStatus.getInstance(this).isOnline()) {
} else {
    ContextThemeWrapper ctw = new ContextThemeWrapper( Home.this, R.style.Theme_AlertDialog);
    final AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(ctw);
    alertDialogBuilder.setTitle("NO Internet Connection");
    alertDialogBuilder.setMessage("Check your  Internet Connection or Try again");
    alertDialogBuilder.setPositiveButton("ok", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int id) {

        }
    });
    alertDialogBuilder.show();
}

Step 7: Open AndroidManifest.xml and do the below changes. And add permission.

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