【发布时间】：2015-04-15 09:21:19
【问题描述】：
我想在我的原生应用程序的 Android 手机的 web 视图中使用 HTML JavaScirpt 访问相机。我尝试了很多解决方案，但都没有帮助。 html字符串如下，
String html =
"<!DOCTYPE html>"+
"<html>"+
"<head>"+
"<meta charset='utf-8'>"+
"<title>Display Webcam Stream</title>"+
"<style>"+
"#container {"+
" margin: 0px auto;"+
" width: 500px;"+
" height: 375px;"+
" border: 10px #333 solid;"+
"}"+
"#videoElement {"+
" width: 500px;"+
" height: 375px;"+
" background-color: #666;"+
"}"+
"#canvas {"+
" width: 500px;"+
" height: 375px;"+
" background-color: #CCC;"+
"}"+
"</style>"+
"</head>"+
"<body>"+
"<input id='fileselect' type='file' accept='image/*' capture='camera'>"+
"<div id='container'>"+
" <video autoplay id='videoElement'>"+
"</video>"+
"</div>"+
"<canvas id='canvas' width='500' height='375'></canvas>"+
"<input type='button' value='Save' id='save' />"+
"<img id='imgtag' src='' width='500' height='375' alt='capture' /> "+
"<script>"+
"var video = document.querySelector('#videoElement');"+
"navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia || navigator.msGetUserMedia || navigator.oGetUserMedia;"+
"if (navigator.getUserMedia) { "+
" navigator.getUserMedia({video: true}, handleVideo, videoError);"+
"} "+
"function handleVideo(stream) {"+
" video.src = window.URL.createObjectURL(stream);"+
"}"+
"function videoError(e) {"+
"}"+
"var v,canvas,context,w,h;"+
"var imgtag = document.getElementById('imgtag');"+
"var sel = document.getElementById('fileselect');"+
"document.addEventListener('DOMContentLoaded', function(){"+
" v = document.getElementById('videoElement');"+
" canvas = document.getElementById('canvas');"+
" context = canvas.getContext('2d');"+
" w = canvas.width;"+
" h = canvas.height;"+
"},false);"+
"function draw(v,c,w,h) {"+
" if(v.paused || v.ended) return false;"+
" context.drawImage(v,0,0,w,h);"+
"var uri = canvas.toDataURL('image/png');"+
"imgtag.src = uri;"+
"}"+
"document.getElementById('save').addEventListener('click',function(e){"+
" draw(v,context,w,h);"+
"});"+
"var fr;"+
"sel.addEventListener('change',function(e){"+
" var f = sel.files[0];"+
" fr = new FileReader();"+
" fr.onload = receivedText;"+
" fr.readAsDataURL(f);"+
"})"+
"function receivedText() {"+
" imgtag.src = fr.result;"+
"} "+
"</script>"+
"</body>"+
"</html>";
我正在将此字符串加载到我的 webview 中，
WebView browser;
browser=(WebView)findViewById(R.id.WebView01);
browser.getSettings().setJavaScriptEnabled(true);
browser.getSettings().setPluginsEnabled(true);
browser.addJavascriptInterface(new WebAppInterface(this), "Android");
browser.loadDataWithBaseURL("", html, mimeType, encoding, "");
我总是在日志消息中收到异常：
“不推荐使用 'capture' 属性作为枚举。请将其用作布尔值并在 'accept' 属性中指定应接受的媒体类型。” （或）“阻止 webkit 绘制”
任何帮助都会非常有用。提前致谢
【问题讨论】：
标签： javascript android html webview camera