How to set hindi font in webView in android

I want to change the default font for webview to my own font. I am using webview in my android app.

I tried to get a custom font instance by placing my own font in assets. But still failed to set the default font for the web browser.

This is what I tried:

WebView myWebView = (WebView) findViewById(R.id.myWebView);
myWebView.setBackgroundColor(0x00000000);
myWebView.getSettings().setJavaScriptEnabled(true);
myWebView.loadUrl("file:///android_asset/Hindi/MyHTMLinHindi.html");

and in the css file I tried:

@font-face {
  font-family:Mangal;
  src: url("file:///android_asset/Fonts/mangal.ttf")
  }
  body {
  font-family:Mangal;
  }

Please suggest me any way ... Thanx in advance ..