使用javascript的Android webview自定义字体

我正在尝试使用自定义字体在webview中显示文本，我选择了自定义字体来显示该字体样式。下面的详细信息用代码解释了这个问题

public void setFontFamily(String fontFamily) {
        exec("javascript:RE.setFontFamily('" + fontFamily + "');");
    }

So In JS file 

I have following the code

RE.setFontFamily = function(fontFamily) {
    RE.restorerange();
    //document.execCommand("insertHtml", false, "&nbsp")
    console.log("Font Family: "+fontFamily)
    document.execCommand("styleWithCSS", null, true);
    document.execCommand("fontName", false, fontFamily);
    document.execCommand("styleWithCSS", null, false);
};

Above is code snippet i have used

So calling methods are below mentioned

 when (p2) {
            0 -> {
                richEditor.setFontFamily("Times New Roman, Times, serif")
            }
            1 -> {
                richEditor.setFontFamily("Trebuchet MS, Helvetica, sans-serif")
            }
            2 -> {
                richEditor.setFontFamily("Verdana, Geneva, sans-serif")
            }
            3 -> {
                richEditor.setFontFamily("Comic Sans MS, Cursive, sans-serif")
            }
            else -> {
                richEditor.setFontFamily("Courier New, Courier, monospace")
            }

在上述调用中，泰晤士报新罗马版和Courier New正常工作，但其他字体不正常 不工作。重要的是html是根据我的输入正确编译的

Compiled Html data is below 


<font face="Times New Roman, Times, serif">Times new Roman, </font><div><font face="Trebuchet MS, Helvetica, sans-serif">trebuchet, </font></div><div><font face="Verdana, Geneva, sans-serif">verdana, </font></div><div><font face="Comic Sans MS, cursive, sans-serif">comic sans</font></div><div><font face="Times New Roman, Times, serif">Times new Roman, </font></div><div><font face="Trebuchet MS, Helvetica, sans-serif">trebuchet, </font></div><div><font face="Verdana, Geneva, sans-serif">verdana, </font></div><div><font face="Comic Sans MS, cursive, sans-serif">comic sans</font></div>

编译的Html数据如下所示
泰晤士报新罗马，投石机，verdana，漫画sans泰晤士报新罗马，投石机，verdana，漫画sans