如何检测Android浏览器而不检测Android App（WebView）？

Question

I have created an Android app for my website example.com using WebView. Now I want my users to browse my website only from the app so I want to show a message on the footer as Quora does for the Android users browsing from browsers. See image below for reference:

Now the problem is I am using webView of example.com in the app and I want to display the message on 'example.com` itself so whatever codes I use to show the message also gets displayed in webView. Is there any way to detect or differentiate between android browsers and android webView apps?

Note: I want to show the message on the website and not in the app. So provide codes in PHP, HTML or javascript and not Java.

Answer 1

Gives same o/p for both webView as well as browser.

<?php
$url = $_SERVER["HTTP_X_REQUESTED_WITH"];
$url1 = "com.chatadda.free";
$url2 = "com.chatadda.android";
$url3 = "com.chatadda.android.pro";
$url4 = "com.chatadda.android.premium";
if($url != $url1 || $url != $url2 || $url != $url3 || $url != $url4) {
echo "Not on App";
echo $_SERVER["HTTP_X_REQUESTED_WITH"];
}
else {
echo "On App";
}
?>

Answer 2

How about setting your custom header key&value or override user-agent when webView load page?

For example,

String userAgent = webView.getSettings().getUserAgentString() + "/" + YOUR_PACKAGE_NAME;
webView.getSettings().setUserAgentString(userAgent);

or

Map<String,String> extraHeader = new HashMap<String, String>();
extraHeader.put("isApp", "true");
webView.loadUrl(url, extraHeader);