How can I connect the WebView in the main activity to the content layout?

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To connect a WebView to a content layout in the main activity, first add the WebView to the content layout using the following code:

<WebView
    android:id="@+id/web_view"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

Then, in the main activity, retrieve the WebView using the findViewById() method and load a web page using the loadUrl() method.

WebView webView = (WebView) findViewById(R.id.web_view);
webView.loadUrl("https://www.example.com");

If you want to customize the WebView settings, you can do so using the getSettings() method. For example, to enable JavaScript and to allow the WebView to use the page-wide viewport, you can add the following code:

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