HTML5 Plus 实现手机APP拍照或相册选择图片上传功能的实例代码

黄舟 13851 阅读 0 评论 682 点赞

这篇文章主要为大家详细介绍了HTML5 Plus的Camera、GalleryIO、Storage和Uploader，实现手机APP拍照或相册选择图片上传功能的相关资料，感兴趣的小伙伴们可以参考一下

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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 </head>  
 <body>  
  <header class="bar bar-nav">  
   <h1 class="title">拍照或者相册选择图片上传</h1>  
  </header>  
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   <p style="margin-top: 10px;"></p>  
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     <p class="collapse-content" >  
      <form>  
       <label class="row-label"></label>  
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  //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) {     
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   html +=' <img id="picBig" data-preview-src="" data-preview-group="1" '+src+'/>';   
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  //选取图片的来源，拍照和相册   
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     //alert(entry.name);//IMG_20160704_112620.jpg   
     compressImage(entry.toLocalURL(),entry.name,pid);   
    }, function(e) {   
     plus.nativeUI.toast("读取拍照文件错误：" + e.message);   
    });   
            }, function ( e ) {   
            }, {   
             filename: "_doc/camera/",   
             filter:"image"   
            } );   
        }   
  // 拍照   
  function getImage(pid) {   
   var cmr = plus.camera.getCamera();   
   cmr.captureImage(function(p) {   
    //alert(p);//_doc/camera/1467602809090.jpg   
    plus.io.resolveLocalFileSystemURL(p, function(entry) {   
     //alert(entry.toLocalURL());//file:///storage/emulated/0/Android/data/io.dcloud...../doc/camera/1467602809090.jpg   
     //alert(entry.name);//1467602809090.jpg   
     compressImage(entry.toLocalURL(),entry.name,pid);   
    }, function(e) {   
     plus.nativeUI.toast("读取拍照文件错误：" + e.message);   
    });   
   }, function(e) {   
   }, {   
    filename: "_doc/camera/",   
    index: 1   
   });   
  }   
  //压缩图片   
  function compressImage(url,filename,pid){   
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     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,pid);   
     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,pid,filename,path);   
    },function(error) {   
     plus.nativeUI.toast("压缩图片失败，请稍候再试");   
   });   
  }   
  //保存信息到本地   
  /**   
   *    
   * @param {Object} url  图片的地址   
   * @param {Object} pid  字段的名称   
   * @param {Object} name   图片的名称   
   */   
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   //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-"+pid;//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}   
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    itemvalueitemvalue=itemvalue+"{"+name+","+path+","+url+"}";   
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   plus.storage.setItem(itemname, itemvalue);   
      
   var src = 'src="'+url+'"';   
   //alert("itemvalue="+itemvalue);   
   showImgDetail(name,pid,id,src);   
   wt.close();   
      
  }   
  //上传图片，实例中没有添加上传按钮   
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  //plus.storage.clear();   
   var wa = plus.nativeUI.showWaiting();   
   var DkeyNames=[];   
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   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();   
      
  }   
</script>  
</body>  
</html>

效果图：