【转】H5调用照相机等设备

使用input标签 type值为file，可以调用系统默认的照相机、相册、摄像机、录音功能：

<input type="file" accept="image/*" capture="camera">

<input type="file" accept="video/*" capture="camcorder">

<input type="file" accept="audio/*" capture="microphone">

属性	说明
accept	打开的系统文件目录
capture	系统所捕获的默认设备，camera：照相机；camcorder：摄像机；microphone：录音；
multiple	多选，multiple优先级高于capture，<input type="file" accept="image/*" multiple>

测试发现存在很多兼容性问题，下面将测试出的部分结果列出：

设备	安卓	IOS
camera	*相机、图库、文件管理器等混合选择项*	相机
camcorder	摄像机	摄像机
microphone	录音	相机

安卓调用相机.jpg

<!DOCTYPE HTML>
<html>
<head>
    <title>上传图片</title>
    <meta charset="utf-8">
</head>
<body>
    <iframe name="uploadfrm" id="uploadfrm" style="display: none;"></iframe>
    <form name="formHead" method="post" action="" id="formHead" enctype="multipart/form-data" target="uploadfrm">

        <div>
            <div>
                <input type="file" name="file_head" id="file_head" onchange="javascript:setImagePreview();" />
            </div>
            <div>
                <div id="DivUp" style="display: none">
                    <input type="submit" data-inline="true" id="BtnUp" value="确认上传" data-mini="true" />
                </div>
            </div>
        </div>
    </form>
    <div data-role="fieldcontain">
        <div id="localImag">
            <img id="preview" width="-1" height="-1" style="display: none" />
        </div>
    </div>
        

    <script type="text/javascript">
        function setImagePreview() {
            var preview, img_txt, localImag, file_head = document.getElementById("file_head"),
            picture = file_head.value;
            if (!picture.match(/.jpg|.gif|.png|.bmp/i)) return alert("您上传的图片格式不正确，请重新选择！"),
            !1;
            if (preview = document.getElementById("preview"), file_head.files && file_head.files[0]) preview.style.display = "block",
                preview.style.width = "63px",
                preview.style.height = "63px",
                preview.src = window.navigator.userAgent.indexOf("Chrome") >= 1 || window.navigator.userAgent.indexOf("Safari") >= 1 ? window.webkitURL.createObjectURL(file_head.files[0]) : window.URL.createObjectURL(file_head.files[0]);
            else {
                file_head.select(),
                file_head.blur(),
                img_txt = document.selection.createRange().text,
                localImag = document.getElementById("localImag"),
                localImag.style.width = "63px",
                localImag.style.height = "63px";
                try {
                    localImag.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=scale)",
                    localImag.filters.item("DXImageTransform.Microsoft.AlphaImageLoader").src = img_txt
                } catch(f) {
                    return alert("您上传的图片格式不正确，请重新选择！"),
                    !1
                }
                preview.style.display = "none",
                document.selection.empty()
            }
            return document.getElementById("DivUp").style.display = "block",
            !0
        }
    </script>
</body>
</html>