Android cycle recording, detect memory card capacity, less than a certain value automatically delete the specified folder

Looping video, it sounds is not very tall, in fact, the principle is to detect memory card capacity, less than a certain value automatically delete the specified folder, this monitoring or car recorder will be useful.

/** *  Loop recording, when the memory card capacity is less than 300M, automatically delete the first file inside the video list  */private void xunhuanluxiang ()  {if   (Environment.getexternalstoragestate (). Equals (environment.media_mounted))  {file path =  environment.getexternalstoragedirectory ();//  get sdcard file path statfs statfs = new  StatFs (Path.getpath ());//  get Block's sizelong blocsize = statfs.getblocksize ();//  Gets the number of blocks Long totalblocks = statfs.getblockcount ();//  used by the block Long availablock  = statfs.getavailableblocks ();//  Gets the current available memory capacity, in units: mblong sd = availablock *  blocSize / 1024 / 1024;if  (sd < 300)  {string filepath  =  (Environment.getexternalstoragedirectory () GetAbsolutePath ()  +  "/video/"); File file = new file (filepath);if  (!file.exists ())  {file.mkdirs (); File[] files = file.listfiles ();if  (files.length > 0)  {string childfile[] = file.list (); string dele =  (Filepath + childfile[0]); File file2 = new file (dele); File2.delete ();}}  else if  (Environment.getexternalstoragestate (). Equals (environment.media_removed))  { Toast.maketext (this,  "Please insert memory card",  toast.length_short). Show ();}}

Android cycle recording, detect memory card capacity, less than a certain value automatically delete the specified folder