Android check network available

AndroidManifest.xml

<manifest>
    <!-- other code -->
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
</manifest>

MainActivity.java

public class MainActivity extends AppCompatActivity {
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // ... other code
        boolean flag = NetworkUtils.getInstance(this).isNetworkAvailable();        
    }
}

NetworkUtils.java

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

SingleNetworkUtils.java

public class NetworkUtils {
    private static Context mCtx;
    private static NetworkUtils mInstance;

    public NetworkUtils(Context context) {
        this.mCtx = context;
    }

    public static NetworkUtils getInstance(Context context) {
        if (mInstance == null) {
            mInstance = new NetworkUtils(context.getApplicationContext());
        }
        return mInstance;
    }

    public static boolean isNetworkAvailable() {
        ConnectivityManager connectivityManager
                = (ConnectivityManager) mCtx.getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
        return activeNetworkInfo != null && activeNetworkInfo.isConnected();
    }
}