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I want to change font face of html string loaded into WebView similarly as mentioned in this question:
How to change font face of Webview in Android?
The difference is that I am not using old approach where you store you font files in assets folder, but I store them in res/font as described in "Fonts in XML" android font support documentation:
https://developer.android.com/guide/topics/ui/look-and-feel/fonts-in-xml.html
Now, I obviously can't use:
file:///android_asset/fonts/my_font.otf
I tried:
file:///android_res/font/my_font.otf
and many other ways of describing path to my font inside of res/font folder, but none of them work.
How to use custom font family for a WebView that loads html string if my font is stored in res/font folder ?
//Edit:
My current implementation that is not working is:
@BindingAdapter("loadData")
public static void loadData(WebView webView, String htmlData) {
webView.loadDataWithBaseURL(null, htmlData, "text/html", "utf-8", null);
}
@BindingAdapter({"loadData", "fontFamily"})
public static void loadData(WebView webView, String htmlData, @FontRes int fontFamilyId) {
TypedValue value = new TypedValue();
ApplicationActivity.getSharedApplication().getResources().getValue(fontFamilyId, value, true);
String fontPath = value.string.toString();
File fontFile = new File(fontPath);
String prefix = "<html>\n"
+"\t<head>\n"
+"\t\t<style type=\"text/css\">\n"
+"\t\t\t@font-face {\n"
+"\t\t\t\tfont-family: 'CustomFont';\n"
+"\t\t\t\tsrc: url(\"file:///android_res/font/"+fontFile.getName()+"\")\n"
+"\t\t\t}\n"
+"\t\t\tbody {\n"
+"\t\t\t\tfont-family: 'CustomFont';\n"
+"\t\t\t}\n"
+"\t\t</style>\n"
+"\t</head>\n"
+"\t<body>\n";
String postfix = "\t</body>\n</html>";
loadData(webView, prefix + htmlData + postfix);
}
836
Just tried and this works similarly to loading fonts from assets, you just need to change the base url to point to resources instead.
Example HTML
<html>
<head>
<style>
@font-face {
font-family: 'CustomFont';
src: url('font/CustomFont.ttf');
}
#font {
font-family: 'CustomFont';
}
</style>
</head>
<body>
<p>No Font</p>
<br />
<p id="font">Font</p>
</body>
load this HTML into the webview using Webview#loadDataWithBaseURL(String, String, String, String, String), using file://android_res/ as the base url (first param)
Example:
webview.loadDataWithBaseURL("file:///android_res/", html, "text/html", "utf-8", null)
Edit:
If you're using proguard on your release builds you'll need to add extra rules to prevent the R class being renamed during the ProGuard process otherwise the WebView won't be able to find the font resource. Details can be found at this post
195
I managed to load my local font from res/font directory. In my example i want to load italic opensans.
My setup are as follow:
assets directory @font-face {
font-family: 'opensans';
src: url("file:///android_res/font/opensans_italic.ttf")
}
body {
font-family: 'opensans';
font-weight: 400;
}
Load the WebView using loadDataWithBaseUrl, for example:
webView.loadDataWithBaseURL(null, yourHtmlContent, "text/html", "utf-8", null)
But i have this at the the top of my html content:
"<link rel='stylesheet' type='text/css' href='file:///android_asset/mycss.css' />”
I hope it works too for your case.
Edit:
Add this in your proguard config to make it work in release mode.
-keep class com.your.package.name.R$font { *; }
36
You can use the custom res font like this -
<head>
<style type="text/css">
@font-face {
font-family: MyFont;
src: url("file:///res/font/myfont.ttf")
}
body {
font-family: MyFont;
}
</style>
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