Scalable Vector Graphics (SVG) is an XML-based vector image format for two-dimensional graphics with support for interactivity and animation. The SVG specification is an open standard developed by the World Wide Web Consortium (W3C) since 1999. ~ Wikipedia.
You can convert graph file from PNG to SVG using inkscape. Save your svg file in /assets, same level of our html, mypage.html
Modify /assets/mypage.html from the former exercise of WebView.
<!DOCTYPE HTML>
<HTML>
<HEAD>
<script>
var p1;
var p2;
var canvas;
var context;
var cx;
var cy;
var x;
var y;
var canvasOffsetX;
var canvasOffsetY;
var imgSVG = new Image();
imgSVG.src = "test.svg";
function init(){
p1 = document.getElementById('p1');
p2 = document.getElementById('p2');
p1.innerHTML=navigator.userAgent;
canvas = document.getElementById('myCanvas');
context = canvas.getContext('2d');
canvasOffsetX = canvas.getBoundingClientRect().left;
canvasOffsetY = canvas.getBoundingClientRect().top;
canvas.width = window.innerWidth - (2 * canvasOffsetX);
canvas.height = window.innerHeight - canvasOffsetY - 100;
context.drawImage(imgSVG, 0, 0);
}
</script>
</HEAD>
<BODY onload="init()" style="border:5px solid #000000;">
<p id='p1'>un-init</p>
<canvas id='myCanvas' style="border:1px solid #FF0000;">
Canvas not support!
</canvas>
<p id='p2'></p>
</BODY>
</HTML>