由于公司的业务需要,要实现PhoneGAP文件上传并显示进度条。一开始没有仔细看PhoneGAP API就草草开工,后来通过logcat才发现,上传过程中居然有动态刷新上传的字节数据。顿时泪奔,我手动实现的上传进度监听啊,不过既然写了,多少就有收获,详情见:http://blog.csdn.net/herestay/article/details/8567967
现在我们看看如何使用PhoneGAP自带的功能实现上传进度:
先是HTML
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta name="format-detection" content="telephone=no" />
<meta name="viewport" content="initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=no, width=device-width" />
<link rel="stylesheet" href="css/base.css" />
<style type="text/css">
.upload_process_bar{
width:100%;
border:#ccc 1px solid;
height:6px;
padding:1px;
background:#fff;
-moz-border-radius:10px;
-webkit-border-radius:10px;
border-radius:10px;
display:none;
}
.upload_current_process{
height:6px;
width:0%;
background:#A4C639;
-moz-border-radius:10px;
-webkit-border-radius:10px;
border-radius:10px;
}
</style>
<title>文件上传 - demo</title>
</head>
<body>
<h1><a href="javascript:void(0)" id="upload_file_link">选择文件上传</a></h1>
<!-- 上传进度条 -->
<div class="upload_process_bar">
<div class="upload_current_process"></div>
</div>
<div id="process_info"></div>
<!-- 引用JS -->
<script src="scripts/jquery-1.8.3.min.js"></script>
<script src="scripts/cordova-2.2.0.js"></script>
<script src="scripts/upload/upload.js"></script>
</body>
</html>
jquery-1.8.3.min.js,cordova-2.2.0.js 这两个文件就不贴了,自己去网上下载就好。
upload.js
/**FileTransfer*/
var ft;
/**
* 清除上传进度,处理上传失败,上传中断,上传成功
*/
function clearProcess() {
$('.upload_process_bar,#process_info').hide();
ft.abort();
};
/**
* 打开文件选择器,并让其支持所有文件的选择。
*/
function openFileSelector() {
var source = navigator.camera.PictureSourceType.PHOTOLIBRARY;
//描述类型,取文件路径
var destinationType = navigator.camera.DestinationType.FILE_URI;
//媒体类型,设置为ALLMEDIA即支持任意文件选择
var mediaType = navigator.camera.MediaType.ALLMEDIA;
var options={
quality : 50,
destinationType : destinationType,
sourceType : source,
mediaType : mediaType
};
navigator.camera.getPicture(uploadFile,uploadBroken,options);
};
/**
* 上传意外终止处理。
* @param message
*/
function uploadBroken(message){
alert(message);
clearProcess();
};
/**
* 上传过程回调,用于处理上传进度,如显示进度条等。
*/
function uploadProcessing(progressEvent){
if (progressEvent.lengthComputable) {
//已经上传
var loaded=progressEvent.loaded;
//文件总长度
var total=progressEvent.total;
//计算百分比,用于显示进度条
var percent=parseInt((loaded/total)*100);
//换算成MB
loaded=(loaded/1024/1024).toFixed(2);
total=(total/1024/1024).toFixed(2);
$('#process_info').html(loaded+'M/'+total+'M');
$('.upload_current_process').css({'width':percent+'%'});
}
};
/**
* 选择文件后回调上传。
*/
function uploadFile(fileURI) {
var options = new FileUploadOptions();
options.fileKey = "file";
options.fileName = fileURI.substr(fileURI.lastIndexOf('/') + 1);
options.mimeType = "multipart/form-data";
options.chunkedMode = false;
ft = new FileTransfer();
var uploadUrl=encodeURI("http://192.168.1.170:8080/forum/upload/upload-file.html?t=1");
ft.upload(fileURI,uploadUrl,uploadSuccess, uploadFailed, options);
//获取上传进度
ft.onprogress = uploadProcessing;
//显示进度条
$('.upload_process_bar,#process_info').show();
}
/**
* 上传成功回调.
* @param r
*/
function uploadSuccess(r) {
alert('文件上传成功:'+r.response);
clearProcess();
}
/**
* 上传失败回调.
* @param error
*/
function uploadFailed(error) {
alert('上传失败了。');
clearProcess();
}
/**
* 页面实例化回调.
*/
document.addEventListener("deviceready", function(){
$(function(){
$('#upload_file_link').click(openFileSelector);
});
}, false);
上传的后台代码暂时不贴了,有需要的朋友可以留言。