HTML5 Plus 实现手机APP拍照或相册选择图片上传功能

admin html5 2022-02-06 13:56:29 HTML5 Plus 手机APP 拍照图片上传"

利用HTML Plus的Camera、GalleryIO、Storage和Uploader来实现手机APP拍照或者从相册选择图片上传。Camera模块管理设备的摄像头，可用于拍照、摄像操作，通过plus.camera获取摄像头管理对象。Gallery模块管理系统相册，支持从相册中选择图片或视频文件、保存图片或视频文件到相册等功能。通过plus.gallery获取相册管理对象。IO模块管理本地文件系统，用于对文件系统的目录浏览、文件的读取、文件的写入等操作。通过plus.io可获取文件系统管理对象。Storage模块管理应用本地数据存储区，用于应用数据的保存和读取。应用本地数据与localStorage、sessionStorage的区别在于数据有效域不同，前者可在应用内跨域操作，数据存储期是持久化的，并且没有容量限制。通过plus.storage可获取应用本地数据管理对象。Uploader模块管理网络上传任务，用于从本地上传各种文件到服务器，并支持跨域访问操作。通过plus.uploader可获取上传管理对象。Uploader上传使用HTTP的POST方式提交数据，数据格式符合Multipart/form-data规范，即rfc1867（Form-based File Upload in HTML）协议。

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<title>HTML5 Plus 拍照或者相册选择图片上传title>
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head>
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<header class="bar bar-nav">
<h1 class="title">拍照或者相册选择图片上传h1>
header>
<div class="content">
<div style="margin-top: 10px;">div>
<input type="hidden" id="ckjl.id" name="ckjl.id" value="429">
<div class="collapse-content" >
<form>
<label class="row-label">label>
<div id='F_CKJLBS' class="row image-list">
<div class="image-item " id="F_CKJLB" onclick="showActionSheet(this);">div>
div>
form>
div>
div>
<script src="../../js/mui.min.js">script>
<script>
var procinstid = 0;
//初始化页面执行操作
function plusReady() {
//Android返回键监听事件
plus.key.addEventListener('backbutton',function(){
myclose();
},false);
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if (window.plus) {
plusReady();
} else {
document.addEventListener('plusready', plusReady, false);
}
//加载页面初始化需要加载的图片信息
//或者相册IMG_20160704_112620.jpg
//imgId:图片名称：1467602809090或者IMG_20160704_112620
//imgkey:字段例如：F_ZDDZZ
//ID：站点编号ID,例如429
//src：src="file:///storage/emulated/0/Android/data/io.dcloud.HBuilder/.HBuilder/apps/HBuilder/doc/upload/F_ZDDZZ-1467602809090.jpg"
function showImgDetail (imgId,imgkey,id,src) {
var html = "";
html +='<div id="Img'+imgId+imgkey+'" class="image-item ">';
html +=' <img id="picBig" preview-src="" preview-group="1" '+src+'/>';
html +=' <span class="del" onclick="delImg(\''+imgId+'\',\''+imgkey+'\','+id+');">';
html +=' <div class="fa fa-times-circle">div>';
html +=' span>';
html +='div>';
$("#"+imgkey+"S").append(html);
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//删除图片
//imgId:图片名称：IMG_20160704_112614
//imgkey:字段，例如F_ZDDZZ
//ID：站点编号ID，例如429
function delImg(imgId,imgkey,id){
var bts = ["是", "否"];
plus.nativeUI.confirm("是否删除图片？", function(e) {
var i = e.index;
if (i == 0) {
var itemname=id+"img-"+imgkey;//429img-F_ZDDZZ
var itemvalue=plus.storage.getItem(itemname);
//{IMG_20160704_112614,_doc/upload/F_ZDDZZ-IMG_20160704_112614.jpg,file:///storage/emulated/0/Android/data/io.dcloud...../doc/upload/F_ZDDZZ-1467602809090.jpg}
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var index=itemvalue.indexOf(imgId+",");
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delImgfromint(imgId,imgkey,id,index);
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delImgFromLocal(itemname,itemvalue,imgId,imgkey,index); //修改，加了一个index参数
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delImgfromint(imgId,imgkey,id);
}
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},"查勘", bts);
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var end=right.indexOf("}");
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plus.storage.setItem(itemname,newitem);
myAlert("删除成功");
$("#Img"+imgId+imgkey).remove();
wa.close();
}
//选取图片的来源，拍照和相册
function showActionSheet(conf){
var divid = conf.id;
var actionbuttons=[{title:"拍照"},{title:"相册选取"}];
var actionstyle={title:"选择照片",cancel:"取消",buttons:actionbuttons};
plus.nativeUI.actionSheet(actionstyle, function(e){
if(e.index==1){
getImage(divid);
}else if(e.index==2){
galleryImg(divid);
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} );
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//相册选取图片
function galleryImg(divid) {
plus.gallery.pick( function(p){
//alert(p);//file:///storage/emulated/0/DCIM/Camera/IMG_20160704_112620.jpg
plus.io.resolveLocalFileSystemURL(p, function(entry) {
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//alert(entry.name);//IMG_20160704_112620.jpg
compressImage(entry.toLocalURL(),entry.name,divid);
}, function(e) {
plus.nativeUI.toast("读取拍照文件错误：" + e.message);
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filter:"image"
} );
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plus.io.resolveLocalFileSystemURL(p, function(entry) {
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//alert(entry.name);//1467602809090.jpg
compressImage(entry.toLocalURL(),entry.name,divid);
}, function(e) {
plus.nativeUI.toast("读取拍照文件错误：" + e.message);
});
}, function(e) {
}, {
filename: "_doc/camera/",
index: 1
});
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//压缩图片
function compressImage(url,filename,divid){
var name="_doc/upload/"+divid+"-"+filename;//_doc/upload/F_ZDDZZ-1467602809090.jpg
plus.zip.compressImage({
src:url,//src: (String 类型 )压缩转换原始图片的路径
dst:name,//压缩转换目标图片的路径
quality:20,//quality: (Number 类型 )压缩图片的质量.取值范围为1-100
overwrite:true//overwrite: (Boolean 类型 )覆盖生成新文件
},
function(event) {
//uploadf(event.target,divid);
var path = name;//压缩转换目标图片的路径
//event.target获取压缩转换后的图片url路
//filename图片名称
saveimage(event.target,divid,filename,path);
},function(error) {
plus.nativeUI.toast("压缩图片失败，请稍候再试");
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//保存信息到本地
/**
*
* @param {Object} url 图片的地址
* @param {Object} divid 字段的名称
* @param {Object} name 图片的名称
*/
function saveimage(url,divid,name,path){
//alert(url);//file:///storage/emulated/0/Android/data/io.dcloud...../doc/upload/F_ZDDZZ-1467602809090.jpg
//alert(path);//_doc/upload/F_ZDDZZ-1467602809090.jpg
var state=0;
var wt = plus.nativeUI.showWaiting();
// plus.storage.clear();
namename=name.substring(0,name.indexOf("."));//图片名称：1467602809090
var id = document.getElementById("ckjl.id").value;
var itemname=id+"img-"+divid;//429img-F_ZDDZ
var itemvalue=plus.storage.getItem(itemname);
if(itemvalue==null){
itemvalue="{"+name+","+path+","+url+"}";//{IMG_20160704_112614,_doc/upload/F_ZDDZZ-IMG_20160704_112614.jpg,file:///storage/emulated/0/Android/data/io.dcloud...../doc/upload/F_ZDDZZ-1467602809090.jpg}
}else{
itemvalueitemvalue=itemvalue+"{"+name+","+path+","+url+"}";
}
plus.storage.setItem(itemname, itemvalue);
var src = 'src="'+url+'"';
//alert("itemvalue="+itemvalue);
showImgDetail(name,divid,id,src);
wt.close();
}
//上传图片，实例中没有添加上传按钮
function uploadimge(agree,back) {
//plus.storage.clear();
var wa = plus.nativeUI.showWaiting();
var DkeyNames=[];
var id = document.getElementById("ckjl.id").value;
var length=id.toString().length;
var ididnmae=id.toString();
var numKeys=plus.storage.getLength();
var task = plus.uploader.createUpload(getUrl() + 'url', {
method: "POST"
},
function(t, status) {
if (status == 200) {
console.log("上传成功");
$.ajax({
type: "post",
url: getUrl() + 'url',
data: {
taskId: taskId,
voteAgree: agree,
back: back,
voteContent: $("#assign").val(),
},
async: true,
dataType: "text",
success: function(data) {
wa.close();
goList(data);
},
error: function() {
wa.close();
myAlert("网络错误，提交审批失败，请稍候再试");
}
});
} else {
wa.close();
console.log("上传失败");
}
}
);
task.addData("id",id);
for(var i=0; i<imgArray.length;i++){
var itemkey=id+"img-"+imgArray[i];
if(plus.storage.getItem(itemkey)!=null){
var itemvalue=plus.storage.getItem(itemkey).split("{");
for(var img=1;img<itemvalue.length;img++){
var imgname=itemvalue[img].substr(0,itemvalue[img].indexOf(","));
var imgurl=itemvalue[img].substring(itemvalue[img].indexOf(",")+1,itemvalue[img].lastIndexOf(","));
task.addFile(imgurl,{key:imgurl});
}
}
}
task.start();
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script>
body>
html>