android清除缓存并获取大小

来源：互联网发布：有什么好的淘宝会员名编辑：程序博客网时间：2024/06/06 08:53
<span style="font-size:18px;">public class DataCleanManager { public static String getTotalCacheSize(Context context) throws Exception {    long cacheSize = getFolderSize(context.getCacheDir());    if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {      cacheSize += getFolderSize(context.getExternalCacheDir());        }      return getFormatSize(cacheSize);    }        public static void clearAllCache(Context context) {    deleteDir(context.getCacheDir());    if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {      deleteDir(context.getExternalCacheDir());        }      }      private static boolean deleteDir(File dir) {        if (dir != null && dir.isDirectory()) {            String[] children = dir.list();            for (int i = 0; i < children.length; i++) {                boolean success = deleteDir(new File(dir, children[i]));                if (!success) {                    return false;                }            }        }        return dir.delete();    }          // 获取文件      //Context.getExternalFilesDir() --> SDCard/Android/data/你的应用的包名/files/ 目录，一般放一些长时间保存的数据      //Context.getExternalCacheDir() --> SDCard/Android/data/你的应用包名/cache/目录，一般存放临时缓存数据      public static long getFolderSize(File file) throws Exception {          long size = 0;          try {              File[] fileList = file.listFiles();              for (int i = 0; i < fileList.length; i++) {                  // 如果下面还有文件                  if (fileList[i].isDirectory()) {                      size = size + getFolderSize(fileList[i]);                  } else {                      size = size + fileList[i].length();                  }              }          } catch (Exception e) {              e.printStackTrace();          }          return size;      }            /**      * 格式化单位      *       * @param size      * @return      */      public static String getFormatSize(double size) {          double kiloByte = size / 1024;          if (kiloByte < 1) {  //            return size + "Byte";          return "0K";        }            double megaByte = kiloByte / 1024;          if (megaByte < 1) {              BigDecimal result1 = new BigDecimal(Double.toString(kiloByte));              return result1.setScale(2, BigDecimal.ROUND_HALF_UP)                      .toPlainString() + "KB";          }            double gigaByte = megaByte / 1024;          if (gigaByte < 1) {              BigDecimal result2 = new BigDecimal(Double.toString(megaByte));              return result2.setScale(2, BigDecimal.ROUND_HALF_UP)                      .toPlainString() + "MB";          }            double teraBytes = gigaByte / 1024;          if (teraBytes < 1) {              BigDecimal result3 = new BigDecimal(Double.toString(gigaByte));              return result3.setScale(2, BigDecimal.ROUND_HALF_UP)                      .toPlainString() + "GB";          }          BigDecimal result4 = new BigDecimal(teraBytes);          return result4.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString()                  + "TB";      }                 }</span>
0 0