How to switch activity when the Internet is lost or not available?

Question

Java

Hello!
How to switch activity when the Internet is lost or not available?
In the absence of the Internet, the following message will appear instead of the page

here

Instead, I'd like to switch to another activity with a message or an inscription about a connection problem.
What is already there:

webview

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        WebView webView = (WebView) findViewById(R.id.webView);

        WebSettings webSettings = webView.getSettings();
        webSettings.setJavaScriptEnabled(true);
        webView.setWebViewClient(new MyWebViewClietn());  
        webView.loadUrl("http://google.com/");
    }
}

TryNetwork class

public class TryNetwork
{
    public static boolean check()
    {
        Runtime localRuntime = Runtime.getRuntime();
        boolean bool = false;
        try
        {
            int i = localRuntime.exec("/system/bin/ping -c 1 8.8.8.8").waitFor();
            if (i == 0) {
                bool = true;
            }
            return bool;
        }
        catch (InterruptedException localInterruptedException)
        {
            localInterruptedException.printStackTrace();
            return false;
        }
        catch (IOException localIOException)
        {
            localIOException.printStackTrace();
        }
        return false;
    }
}

Answer 1

Combine catch blocks:
and start a new activity right there:

Intent intent = new Intent(this, SomeOtherActivity.class);
        intent.putExtra("NETWORK_ERROR", "Проблема с подключением");  //это опционально
        startActivity(intent);

https://developer.android.com/training/basics/firs...