Android 2.3中的java.io.File類新增功能

對於android 2.3來說原始Sun公司的Java.io.File包中的內容也有了改進，File類在API Level為9時多出了很多新特性，比較實用的有:

  public long getFreeSpace ()  返回這個分區包含這個路徑的剩余空間，如果返回0則表示不存在，下面為SDK原文

   Returns the number of free bytes on the partition containing this path. Returns 0 if this path does not exist. Note that this is likely to be an optimistic over-estimate and should not be taken as a guarantee your application can actually write this many bytes

  public long getTotalSpace () 返回這個分區包含這個路徑的總共字節，如果返回0則表示不存在，下面為SDK原文 

 Returns the total size in bytes of the partition containing this path. Returns 0 if this path does not exist

  同時還有一些和權限相關的API，感興趣的網友可以在android 2.3的SDK文檔中找到，詳細如下

  public boolean setExecutable (boolean executable)

  public boolean setReadable (boolean readable)

  public boolean setWritable (boolean writable, boolean ownerOnly)