记录一些常用的utils方法3

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1: 获取缓存大小

     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);    }

2 :格式化文件大小

    /**     * @param size     * @return     */    public static String getFormatSize(double size) {        double kiloByte = size / 1024;        if (kiloByte < 1) {            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";    }

3 :清除所有缓存

    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();    }

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