phonegap+JQM拍照并上传头像到服务器

工作中需要将用户头像上传到服务器。

需要这么几步：

1，点击img元素弹出Popup，选择拍照或从图片库中选择图片。

2，上传图片

在phonega中拍照需要camera插件。
上传文件需要file-transfer插件。

我在工程中安装的所有插件如下：

        cordova plugin add org.apache.cordova.device
	cordova plugin add org.apache.cordova.network-information
	cordova plugin add org.apache.cordova.battery-status
	cordova plugin add org.apache.cordova.geolocation
	cordova plugin add org.apache.cordova.dialogs
	cordova plugin add org.apache.cordova.camera
	cordova plugin add org.apache.cordova.media-capture
	cordova plugin add org.apache.cordova.media
	cordova plugin add org.apache.cordova.vibration
	cordova plugin add org.apache.cordova.globalization
	cordova plugin add org.apache.cordova.splashscreen
	cordova plugin add org.apache.cordova.inappbrowser
	cordova plugin add org.apache.cordova.file-transfer

下面完成第一步：
建立img元素，当点击该元素的时候跳转到#select_pic_page，#select_pic_page是个popup，
使用JQM是如下写法：

<div>
	<a href="#select_pic_page" data-rel="popup" data-position-to="window" data-transition="pop"><img id="face" style="width:110px;height:110px;" src="img/default_face.jpg" /></a>
	<div data-role="popup" id="select_pic_page" data-overlay-theme="a">
		<ul data-role="listview" data-icon="false">
			<li onclick="onFaceImgClick(0)" style="border-width:0;border-color:#666;border-bottom-width: 1px;"><a style="padding:16px;font-weight:normal;" href="#" data-rel="back">Take a picture</a></li>
			<li onclick="onFaceImgClick(1)" style="border-width:0;"><a style="padding:16px;font-weight:normal;" href="#" data-rel="back">Select From Photo Library</a></li>
		</ul>
	</div>			
</div>

点击popup中的选项，第一个是临时拍照，第二项是从图片库中选择，用flag区分。

function onFaceImgClick(flag){
//	var w=$("#my_profile_page #face").width();
//	var h=$("#my_profile_page #face").height();
	var w=440;
	var h=440;
	
	var quality = device.platform=="Android"?100:50;
//	log("device.platform="+device.platform+";quality====="+quality);
	var cameraOptions;
	if(flag==0){
		cameraOptions={	
				quality : quality,//ios为了避免部分设备上出现内存错误，quality的设定值要低于50。
				destinationType : Camera.DestinationType.FILE_URI,//FILE_URI,DATA_URL
				sourceType : Camera.PictureSourceType.CAMERA,//CAMERA,SAVEDPHOTOALBUM
				allowEdit : true,
				encodingType : Camera.EncodingType.JPEG,//JPEG,PNG
				targetWidth : w,
				targetHeight : h
		};
	}else{
		cameraOptions={	
				quality : quality,//ios为了避免部分设备上出现内存错误，quality的设定值要低于50。
				destinationType : Camera.DestinationType.FILE_URI,//FILE_URI,DATA_URL
				sourceType : Camera.PictureSourceType.PHOTOLIBRARY,//CAMERA,SAVEDPHOTOALBUM
				allowEdit : true,
				encodingType : Camera.EncodingType.JPEG,//JPEG,PNG
				targetWidth : w,
				targetHeight : h
		};
	}
	navigator.camera.getPicture( onCameraSuccess, onCameraError, cameraOptions);
}

获取图片成功后执行回调函数onCameraSuccess，参数imageURI是拍照成功后返回的图片路径

function onCameraSuccess(imageURI){//imageData
//	log("data==="+imageURI);
//	$("#my_profile_page #face").attr("src","data:image/jpeg;base64," + imageData);
	
	user.imgOriginalUrl=imageURI;
	$("#my_profile_page #face").attr("src",user.imgOriginalUrl);
//拍照成功后，需要上传文件
	var fileName=imageURI.substr(imageURI.lastIndexOf('/') + 1);
	var options = new FileUploadOptions();
	options.fileKey = "fieldName";//图片域名！！！
	if(fileName.indexOf('?')==-1){
		options.fileName = fileName;
	}else{
		options.fileName = fileName.substr(0,fileName.indexOf('?'));
	}
	
	 options.mimeType = "image/jpeg";
	//options.mimeType = "multipart/form-data";
	 options.chunkedMode = false;
	 
	 var params = {};
	 params.sid = user.sid;
	 params.fileType = "customer";
	 options.params = params;
	 
	 var uri = encodeURI(BASE_URL+"phoneCustomer/updateCustomerInfo.action?sid="+user.sid+"&fileType=customer");

	 var ft = new FileTransfer();
	 ft.upload(imageURI, uri, onFileUploadSuccess, onFileUploadFail, options);
}

function onCameraError(message){
	log('Failed because: ' + message);
}

function onFileUploadSuccess(result){
	log("========onFileUploadSuccess===========");
//	log("Code = " + result.responseCode+";Response = " + result.response+";Sent = " + result.bytesSent);
}
function onFileUploadFail(error){
	log("code = "+error.code+";upload error source = " + error.source+";upload error target = " + error.target);
}

在ios中，如果点击无法调出camera，请务必执行一下命令cordova build ios