统计目录大小和时间删除早期的大文件

为什么要做这些，等你需要的时候你就知道了

private void deleteOldestFile(File directory) { File[] files = directory.listFiles(); Arrays.sort(files, new Comparator<File>() {     @Override     public int compare(File f1, File f2)     {               return Long.valueOf(f1.lastModified()).compareTo(f2.lastModified());             }}); files[0].delete();  } private static long dirSize(File dir) { long result = 0; File[] fileList = dir.listFiles(); for(int i = 0; i < fileList.length; i++) {     if(fileList[i].isDirectory()) {         result += dirSize(fileList [i]);     } else {         // Sum the file size in bytes         result += fileList[i].length();     }  } return result; }

File dirlist = new File(Environment.getExternalStorageDirectory() + "/VideoList"); if(!(dirlist.exists())) dirlist.mkdir(); Long directorySize = dirSize(dirlist);  if (directorySize > 1073741824) // this is 1GB in bytes  {     deleteOldestFile(dirlist);  } File TempFile = new File(Environment.getExternalStorageDirectory()                 + "/VideoList", dateFormat.format(date) + fileFormat); mediaRecorder.setOutputFile(TempFile.getPath());

或者

while (directorySize > 1073741824) {   deleteOldestFile(dirlist);   direcotrySize = dirSize(dirlist); }