DirectoryReader Interface

这个 DirectoryReader 接口提供与引用文件和目录信息相关的方法下 '/media' USB存储器的目录。

属性

• readonly 属性的结果

  JSON格式的目录项的结果。

方法

• void getTree()

  The getTree() method starts directory traversal at the specified path asynchronously. When the operation is finished, the result attribute is updated and the function assigned to onload is called. Or, onerror is called when the operation failed. The result is in JSON format that contains an array of nodes. Symbolic links are not followed.

• void abort()

  The abort() method cancels the request on the object. Then, onabort is called.

• void readEntries(EntryCallback callback)

  The readEntries() method returns directory entries one by one through the callback function. When it reaches the end of the directory entries, the callback function is called with null and onload is called. If the abort() method is called, directory reading is stopped immediately and onabort is called.

事件

• onload
• onabort
• onerror

举例说明

• Define the onload callback and show the result

  var reader = new sony.tv.DirectoryReader('/media');
  reader.onload = function() {
    var json = JSON.parse(reader.result);
    for (var i = 0; i < json.length; i++) {
      console.log(json[i].name);
    }
  };
  

• 结果示例 如果目标目录包含以下内容， onload 以JSON格式调用，结果如下。
  • Included files:
    • readme.txt (file)
    • LICENSE (file)
    • src (directory with sub entries)
    • main.c (file)
    • plugins (empty directory)
  • 结果

    [
      {
        "name": "readme.txt",
        "size": 1234,
        "date": "Wed, 28 May 2014 17:00:00 GMT"
      },
      {
        "name": "LICENSE",
        "size": 5678,
        "date": "Wed, 28 May 2014 17:00:00 GMT"
      },
      {
        "name": "src",
        "date": "Wed, 28 May 2014 17:00:00 GMT",
        "children": [
          {
            "name": "main.c",
            "size": 321,
            "date": "Wed, 28 May 2014 17:00:00 GMT"
          }
          {
            "name": "plugins",
            "date": "Wed, 28 May 2014 17:00:00 GMT",
            "children": [],
            "items": []
          }
        ]
      }
    ]