“restart” app if no internet connection

Question

I am building a webview where if there is no internet connection, it will load a local error html file. I made it work in my MainActivity which is where the webview is created. But I am having a problem accessing my webview from ourViewClient that handles all the stuff happening inside the webview. So i cannot use the browser.loadUrl("file:///android_asset/error.html"); inside that class. I tried using intent but absolutely nothing happens when i press a button on my web page when i have no internet connection. Is there a possibility of replacing the intent with a command which kinda restarts the app and start from the beginning so it checks for internet connection in the MainActivity again? I am a beginner at this so please explain simple

This is the intent that does not work in ourViewClient

if (CheckNetwork.isInternetAvailable(context)) {
    return false;
} else {
    Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse("file:///android_asset/error.html"));
    context.startActivity(intent);
}

MainActivity

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    mClass = new ourViewClient(this);

    browser = (WebView) findViewById(R.id.wvwMain);

    browser.getSettings().setJavaScriptEnabled(true);
    browser.getSettings().setLoadWithOverviewMode(true);
    browser.getSettings().setUseWideViewPort(true);

    browser.setWebViewClient(new ourViewClient(this));
    if(CheckNetwork.isInternetAvailable(MainActivity.this)){
        browser.loadUrl("http://MyWebPage");
    } else {
        browser.loadUrl("file:///android_asset/error.html");
    }
}

Answer 1

You will have to run a timer which will check if Internet connection is available or not after a certain period.

Example:

Timer t = new Timer();
t.scheduleAtFixedRate(new TimerTask() {

    @Override
    public void run() {
        //Check internet connection here
    }

},
//Set how long before to start calling the TimerTask (in milliseconds)
0,
//check once every 10 seconds, you might want to do this less frequently as checking network  is a costly operation
10000);

And to restart your Activity do something like this.

if (Build.VERSION.SDK_INT >= 11) {
    recreate(); //This method is only available on Android version 11 and above
} else {
    Intent intent = getIntent();
    intent.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
    finish();
    overridePendingTransition(0, 0);
    startActivity(intent);
    overridePendingTransition(0, 0);
}