webview host application in android

Question

I am a beginner. When I start to make an app with webview.

I saw on docs that https://developer.android.com/reference/android/webkit/WebViewClient#shouldOverrideUrlLoading(android.webkit.WebView,%20java.lang.String)

Give the host application a chance to take control when a URL is about to be loaded in the current WebView.

I am weak in Englis but I know what is hosting. but I don't get what is host application, why it calls like that?

1) Is host application means a web browser or webview in my app?

2) It should be helpful how shouldoverrideurlloading works with webview and browser.

3) return true will open a web browser??

Dalai_Lama Dalai_Lama · Accepted Answer · 2018-10-17T07:55:11

@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
    final Uri uri = Uri.parse(url);
    return handleUri(view, uri);
}

@TargetApi(Build.VERSION_CODES.N)
@Override
public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
    final Uri uri = request.getUrl();
    return handleUri(view, uri);
}

and handleUri method

private boolean handleUri(WebView view, Uri uri) {
    final String scheme = uri.getScheme();
    final String host = uri.getHost();
    // Based on some condition you need to determine if you are going to load the url
    // in your web view itself or in a browser.
    // You can use `host` or `scheme` or any part of the `uri` to decide.
    if (scheme.startsWith("http:") || scheme.startsWith("https:")) {
        view.loadUrl(uri.getPath());
        return true;
    } else {
        return false;
    }
}

webview host application in android

2 Answers