html代码：

<input type="button" value="上传头像" onclick="selectPhone()"/>
<img id="avatar" name="avatar" src="" width="100px;">

引入相关js:

• api.js
• APICloud-rest-SHA1.js
• jquery.js

js代码：

function selectPhone(){
        api.actionSheet({
            title: '上传头像',
            cancelTitle: '取消',
            buttons: ['拍照','从手机相册选择']
        }, function(ret, err) {
            if (ret) {
                getPicture(ret.buttonIndex);
            }
        });
    }
    function getPicture(sourceType){
        if(sourceType==1){ // 拍照
            //获取一张图片
            api.getPicture({
                sourceType: 'camera',
                encodingType: 'png',
                mediaValue: 'pic',
                allowEdit: false,
                quality: 90,
                saveToPhotoAlbum: true
            }, function(ret, err) {
                // 获取拍照数据并处理
                if (ret) {
                    var imgSrc = ret.data;
                    if (imgSrc != "") {

                      $('#avatar').attr('src',ret.data);
                      updateFile(ret.data,"");
                    }
                }
            });
        }else if(sourceType==2){ // 从相机中选择
          api.getPicture({
              sourceType: 'album',
              encodingType: 'jpg',
              mediaValue: 'pic',
              destinationType: 'url',
              allowEdit: true,
              quality: 50,
              targetWidth: 100,
              targetHeight: 100,
              saveToPhotoAlbum: false
          }, function(ret, err) {
              if (ret) {
                  alert(JSON.stringify(ret));
                  $('#avatar').attr('src',ret.data);
                  updateFile(ret.data,"");
              } else {
                  alert(JSON.stringify(err));
              }
          });
        }
    }
    /*
     * 图片上传
     */
    function updateFile(path,filename){
        var client = new Resource("A6050753711177", "62DA62DE-10BB-D1FE-55B0-B335FEA94510");
        var File = client.Factory("file");
        File.save(
        {
            file:
            {
                isFile:true,
                path:path,
                values:
                {
                    filename:filename
                }
            }
        },
        function(data,err){
            api.hideProgress();
            if(data){
                alert("上传结果："+JSON.stringify(data));
            }else{
                alert("上传发生错误："+JSON.stringify(err));
            }
        })
    }