计算及清除缓存类

来源：互联网发布：王麟知乎什么回事编辑：程序博客网时间：2024/05/17 01:49
自己修改了一下：
/** * Created by Administrator on 2016/1/28. * 缓存工具类 * 描述:主要功能有清除内/外缓存，清除数据库，清除sharedPreference，清除files和清除自定义目录 */public class CleanCacheManagerUtil {    /**     * * 清除本应用内部缓存(/data/data/com.xxx.xxx/cache) * *     *     * @param context     */    public static void cleanInternalCache(Context context) {        deleteFilesByDirectory(context.getCacheDir());    }    /**     * * 清除本应用所有数据库(/data/data/com.xxx.xxx/databases) * *     *     * @param context     */    public static void cleanDatabases(Context context) {        deleteFilesByDirectory(new File("/data/data/"                + context.getPackageName() + "/databases"));    }    /**     * * 清除本应用SharedPreference(/data/data/com.xxx.xxx/shared_prefs) *     *     * @param context     */    public static void cleanSharedPreference(Context context) {        deleteFilesByDirectory(new File("/data/data/"                + context.getPackageName() + "/shared_prefs"));    }    /**     * * 按名字清除本应用数据库 * *     *     * @param context     * @param dbName     */    public static void cleanDatabaseByName(Context context, String dbName) {        context.deleteDatabase(dbName);    }    /**     * * 清除/data/data/com.xxx.xxx/files下的内容 * *     *     * @param context     */    public static void cleanFiles(Context context) {        deleteFilesByDirectory(context.getFilesDir());    }    /**     * * 清除外部cache下的内容(/mnt/sdcard/android/data/com.xxx.xxx/cache)     *     * @param context     */    public static void cleanExternalCache(Context context) {        if (Environment.getExternalStorageState().equals(                Environment.MEDIA_MOUNTED)) {            deleteFilesByDirectory(context.getExternalCacheDir());        }    }    /**     * * 清除自定义路径下的文件，使用需小心，请不要误删。而且只支持目录下的文件删除 * *     *     * @param filePath     * */    public static void cleanCustomCache(String filePath) {        deleteFilesByDirectory(new File(filePath));    }    /**     * * 清除本应用所有的数据 * *     *     * @param context     * @param filepath     */    public static void cleanApplicationData(Context context, String... filepath) {        cleanInternalCache(context);        cleanExternalCache(context);        cleanDatabases(context);        cleanSharedPreference(context);        cleanFiles(context);        if (filepath == null) {            return;        }        for (String filePath : filepath) {            cleanCustomCache(filePath);        }    }    /**     * * 删除方法 这里只会删除某个文件夹下的文件，如果传入的directory是个文件，将不做处理 * *     *     * @param directory     */    private static boolean deleteFilesByDirectory(File directory) {//        if (directory != null && directory.exists() && directory.isDirectory()) {//            String[] children = directory.list();//            for (int i = 0; i < children.length; i++) {//                boolean success = deleteFilesByDirectory(new File(directory, children[i]));//                if (!success) {//                    return false;//                }//            }//        }//        return true;        if (directory != null && directory.isDirectory()) {            String[] children = directory.list();            for (int i = 0; i < children.length; i++) {                boolean success = deleteFilesByDirectory(new File(directory, children[i]));                if (!success) {                    return false;                }            }        }        return directory.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;    }    /**     * 删除指定目录下文件及目录     *     * @param deleteThisPath     * @param //filepath     * @return     */    public static void deleteFolderFile(String filePath, boolean deleteThisPath) {        if (!TextUtils.isEmpty(filePath)) {            try {                File file = new File(filePath);                if (file.isDirectory()) {// 如果下面还有文件                    File files[] = file.listFiles();                    for (int i = 0; i < files.length; i++) {                        deleteFolderFile(files[i].getAbsolutePath(), true);                    }                }                if (deleteThisPath) {                    if (!file.isDirectory()) {// 如果是文件，删除                        file.delete();                    } else {// 目录                        if (file.listFiles().length == 0) {// 目录下没有文件或者目录，删除                            file.delete();                        }                    }                }            } catch (Exception e) {                e.printStackTrace();            }        }    }    /**     * 格式化单位     *     * @param size     * @return     */    public static String getFormatSize(double size) {        double kiloByte = size / 1024;        if (kiloByte < 1) {            return size + "B";        }        double megaByte = kiloByte / 1024;        if (megaByte < 1) {            BigDecimal result1 = new BigDecimal(Double.toString(kiloByte));            return result1.setScale(2, BigDecimal.ROUND_HALF_UP)                    .toPlainString() + "K";        }        double gigaByte = megaByte / 1024;        if (gigaByte < 1) {            BigDecimal result2 = new BigDecimal(Double.toString(megaByte));            return result2.setScale(2, BigDecimal.ROUND_HALF_UP)                    .toPlainString() + "M";        }        double teraBytes = gigaByte / 1024;        if (teraBytes < 1) {            BigDecimal result3 = new BigDecimal(Double.toString(gigaByte));            return result3.setScale(2, BigDecimal.ROUND_HALF_UP)                    .toPlainString() + "G";        }        BigDecimal result4 = new BigDecimal(teraBytes);        return result4.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString()                + "T";    }    public static String getCacheSize(File file) throws Exception {        return getFormatSize(getFolderSize(file));    }}
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