android 清理缓存

来源：互联网发布：cassandra 导出数据库编辑：程序博客网时间：2024/05/17 03:30
今天在做公司项目时候，涉及到清理缓存问题，处理很久，自己看了很多代码，写了又改，改了又写。以下能够实现我的需求的。
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/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/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++) {                                  if (fileList[i].isDirectory()) {                      size = size + getFolderSize(fileList[i]);                  } else {                      size = size + fileList[i].length();                  }              }          } catch (Exception e) {              e.printStackTrace();          }          return size;      }                public static String getFormatSize(double size) {          double kiloByte = size / 1024;          if (kiloByte < 1) {              return "0 K";        }             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";      }                    }
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