一、 Camera Api 简单介绍
Camera 选择使用摄像头拍照，或从设备相册中获取一张照片。图片以 base64 编码的 字符串或图片 URI 形式返回。
方法：
1. camera.getPicture 拍照获取相册图片 navigator.camera.getPicture( cameraSuccess, cameraError, [ cameraOptions ] );
cameraSuccess：提供图像数据的 onSuccess 回调函数。
cameraError：提供错误信息的 onError 回调函数。
cameraOptions：定制摄像头设置的可选参数
2. camera.cleanup 清除拍照后设备的缓存图片
navigator.camera.cleanup( cameraSuccess, cameraError );
3.cameraOptions 参数： 定制摄像头设置的可选参数。
quality : 存储图像的质量，范围是[0,100]。
destinationType :选择返回数据的格式。
DATA_URL :0, // Return image as base64-encoded string
FILE_URI :1, // Return image file URI
NATIVE_URI :2 // Return image native URI (e.g. assets-library:// on iOS or content:// on Android)
sourceType :设定图片来源。data:image/jpeg;base64,
PHOTOLIBRARY :0,//拍完照后图片的路劲从图库中获取
CAMERA :1,//拍完照后图片的路劲从设备照相机中获取
SAVEDPHOTOALBUM :2//拍完照后图片的路劲从相册中获取
allowEdit :在选择图片进行操作之前允许对其进行简单编辑。(好像只有 ios 支持，在 Android 中，忽略 allowEdit 参数。)
encodingType :选择返回图像文件的编码方 encodingType: Camera.EncodingType.JPEG
targetWidth :以像素为单位的图像缩放宽度指定图片展示的时候的宽度
targetHeight :以像素为单位的图像缩放高度指定图片展示的时候的高度
saveToPhotoAlbum:拍完照片后是否将图像保存在设备上的相册
mediaType 设置选择媒体的类型
PICTURE:0, // allow selection of still pictures only.DEFAULT. Will return format specified via DestinationType
VIDEO:1, // allow selection of video only, WILL ALWAYS RETURN FILE_URI
ALLMEDIA :2 // allow selection from all media types
cameraDirection 选择前置摄像头还是后置摄像头
BACK :0, // Use the back-facing camera
FRONT :1 // Use the front-facing camera
Camera.PictureSourceType.PHOTOLIBRARY 或 Camera.PictureSourceType.SAVEDPHOTOALBUM 都会显示同一个相集。
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>phonegap_device_network_notification01</title>
<link href="../jquery.mobile-1.3.2.css" rel="stylesheet" type="text/css"/>
<script src="../jquery.js" type="text/javascript"></script>
<script src="../jquery.mobile-1.3.2.js" type="text/javascript"></script>
<script src="../cordova.js" type="text/javascript"></script>
<script type="text/javascript">
$(document).ready(function(){
document.addEventListener("deviceready", myDeviceReadyListener, false);
});
function myDeviceReadyListener(){
$(‘#btn_getPic‘).click(function(){
navigator.camera.getPicture(onSuccess, onFail, {
quality: 70,
destinationType: Camera.DestinationType.DATA_URL, //以文件地址返回url 这里进行了编码，成功拍照获取图片路径对应的方式如下
//sourceType:Camera.PictureSourceType.Camera, //摄像机获取，调用拍照
sourceType:Camera.PictureSourceType.PHOTOLIBRARY, //从图库中选取图片，不用调用拍照
targetWidth:200,
targetHeight:200
});
})
}
//成功 回调函数里包含图片的地址
function onSuccess(imageURI){
alert(imageURI);
$(‘#img_pic‘).css(‘display‘,‘block‘);
$(‘#img_pic‘).attr("src","data:image/jpeg;base64," + imageURI);
//image.src = "data:image/jpeg;base64," + imageData;
}
//失败 回调函数李包含失败返回的信息
function onFail(message) {
alert(‘Failed because: ‘ + message);
}
</script>
</head>
<body>
<div data-role="page">
<div data-role="header">
<h1>Camera</h1>
</div>
<div data-role="content">
<img style="dispaly:none" id="img_pic"/>
<a id="btn_getPic" href="#" data-role="button">拍照</a>
</div>
<div data-role="footer">
<h4> </h4>
</div>
</div>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>phonegap_device_network_notification01</title>
<link href="../jquery.mobile-1.3.2.css" rel="stylesheet" type="text/css"/>
<script src="../jquery.js" type="text/javascript"></script>
<script src="../jquery.mobile-1.3.2.js" type="text/javascript"></script>
<script src="../cordova.js" type="text/javascript"></script>
<script type="text/javascript">
$(document).ready(function(){
document.addEventListener("deviceready", myDeviceReadyListener, false);
});
function myDeviceReadyListener(){
$(‘#btn_getPic‘).click(function(){
navigator.camera.getPicture(onSuccess, onFail, {
quality: 70,
destinationType: Camera.DestinationType.FILE_URI, //以文件地址返回url
sourceType:Camera.PictureSourceType.Camera,
targetWidth:300,
targetHeight:300
});
})
}
//成功
function onSuccess(imageURI) {
alert(imageURI);
$(‘#img_pic‘).css(‘display‘,‘block‘);
$(‘#img_pic‘).attr("src",imageURI);//这种获取图片路径的方式对应的是destinationType: Camera.DestinationType.FILE_URI
}
//失败
function onFail(message) {
alert(‘Failed because: ‘ + message);
}
</script>
</head>
<body>
<div data-role="page">
<div data-role="header">
<h1>Camera</h1>
</div>
<div data-role="content">
<img style="dispaly:none" id="img_pic"/>
<a id="btn_getPic" href="#" data-role="button">拍照</a>
</div>
<div data-role="footer">
<h4> </h4>
</div>
</div>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>phonegap_device_network_notification01</title>
<link href="../jquery.mobile-1.3.2.css" rel="stylesheet" type="text/css"/>
<script src="../jquery.js" type="text/javascript"></script>
<script src="../jquery.mobile-1.3.2.js" type="text/javascript"></script>
<script src="../cordova.js" type="text/javascript"></script>
<script type="text/javascript">
$(document).ready(function(){
document.addEventListener("deviceready", myDeviceReadyListener, false);
});
function myDeviceReadyListener(){
$(‘#btn_getPic‘).click(function(){
navigator.camera.getPicture(onSuccess, onFail, {
quality: 70,
destinationType: Camera.DestinationType.DATA_URL, //以文件地址返回url
sourceType:Camera.PictureSourceType.Camera,
targetWidth:100,
targetHeight:100
});
})
}
//成功
function onSuccess(imageURI){
alert(imageURI);
$(‘#img_pic‘).css(‘display‘,‘block‘);
$(‘#img_pic‘).attr("src","data:image/jpeg;base64," + imageURI);
//image.src = "data:image/jpeg;base64," + imageData;
}
//失败
function onFail(message) {
alert(‘Failed because: ‘ + message);
}
</script>
</head>
<body>
<div data-role="page">
<div data-role="header">
<h1>Camera</h1>
</div>
<div data-role="content">
<img style="dispaly:none" id="img_pic"/>
<a id="btn_getPic" href="#" data-role="button">拍照</a>
</div>
<div data-role="footer">
<h4> </h4>
</div>
</div>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>phonegap_device_network_notification01</title>
<link href="../jquery.mobile-1.3.2.css" rel="stylesheet" type="text/css"/>
<script src="../jquery.js" type="text/javascript"></script>
<script src="../jquery.mobile-1.3.2.js" type="text/javascript"></script>
<script src="../cordova.js" type="text/javascript"></script>
<script type="text/javascript">
$(document).ready(function(){
document.addEventListener("deviceready", myDeviceReadyListener, false);
});
function myDeviceReadyListener(){
//从相机拍照获取 base64 编码方式返回
$(‘#btn_getPic‘).click(function(){
navigator.camera.getPicture(onSuccess1, onFail, {
quality: 70,
destinationType: Camera.DestinationType.DATA_URL, //以文件地址返回url
sourceType:Camera.PictureSourceType.Camera,
targetWidth:100,
targetHeight:100
});
})
//从图库获取 url
$(‘#btn_getLibiaryPic‘).click(function(){
navigator.camera.getPicture(onSuccess2, onFail, {
quality: 70,
destinationType: Camera.DestinationType.FILE_URL, //以文件地址返回url，如果选择的媒体类型是视频，只能是这个方式：FILE_URL
sourceType:Camera.PictureSourceType.PHOTOLIBRARY,
mediaType:Camera.MediaType.VIDEO,
targetWidth:100,
targetHeight:100
});
})
}
//成功 相机
function onSuccess1(imageURI){
alert(imageURI);
$(‘#img_pic‘).css(‘display‘,‘block‘);
$(‘#img_pic‘).attr("src","data:image/jpeg;base64," + imageURI);
//image.src = "data:image/jpeg;base64," + imageData;
}
//成功 图库
function onSuccess2(imageURI){
alert(imageURI);
//$(‘#img_pic‘).css(‘display‘,‘block‘);
// $(‘#img_pic‘).attr("src",imageURI);
$("#videocontainer").append("<video height=240 width=300 controls=‘controls‘ src=‘"+imageURI+"‘ >your browder doesn‘t support video tag</video>");
//image.src = "data:image/jpeg;base64," + imageData;
}
//失败
function onFail(message) {
alert(‘Failed because: ‘ + message);
}
</script>
</head>
<body>
<div data-role="page">
<div data-role="header">
<h1>Camera</h1>
</div>
<div data-role="content">
<img style="dispaly:none" id="img_pic"/>
<a id="btn_getPic" href="#" data-role="button">拍照</a>
<a id="btn_getLibiaryPic" href="#" data-role="button">本地预览</a>
<div id="videocontainer">
</div>
</div>
<div data-role="footer">
<h4> </h4>
</div>
</div>
</body>
</html>