FireflyApi storage

3.6 外部存储相关

获取外部存储U盘路径

函数：public String getUSBPath(int num)
描述：获取外部存储U盘路径
参数：num u盘的index
返回：失败返回null 
范例：  
String usb1_path  = mFireflyApi.getUSBPath(1);

获取外部存储SD卡路径

函数：public String getSDcardPath()
描述：获取外部存储SD卡路径
返回：失败返回null 
范例：  
String sd_path  = mFireflyApi.getSDcardPath();

卸载外部存储

函数：public　void doUnmountVolume(String path,boolean force,boolean removeEncryption)
描述：卸载外部存储
参数：path 路径为volume mountPoint，负责会抛错
　　　force　强制卸载,为false时被占用的设备不会卸载
   　removeEncryption　为ture时，包含了force为true,此时会强制卸载并移除加密映射
/*
 * If force is not set, we do not unmount if there are
 * processes holding references to the volume about to be unmounted.
 * If force is set, all the processes holding references need to be
 * killed via the ActivityManager before actually unmounting the volume.
 * This might even take a while and might be retried after timed delays
 * to make sure we dont end up in an instable state and kill some core
 * processes.
 * If removeEncryption is set, force is implied, and the system will remove any encryption
 * mapping set on the volume when unmounting.
 */
备注：调用此接口卸载外部存储时，先用StorageList.getVolumeState来检测path的挂载状态，为Environment.MEDIA_MOUNTED时再卸载
范例：
StorageList mStorageList = new StorageList(context);
if(Environment.MEDIA_MOUNTED.equals(mStorageList.getVolumeState(path)))
	mFireflyApi.doUnmountVolume("/mnt/sdcard/",true,false);

3.6 外部存储相关​

3.6 外部存储相关