Android 清理数据/缓存工具类 CleanCacheUtil

/**
 *  * 清除缓存
 *  *
 *  
 */
public class CleanCacheUtil {

    /**
      * @param context
      * @return
      * @throws Exception
      *             获取当前缓存
      */
            

    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);
    }

    /**
      * @param context
      *            删除缓存
      */
            

    public static void clearAllCache(Context context) {
        deleteDir(context.getCacheDir());
        if (Environment.getExternalStorageState().equals(
                                Environment.MEDIA_MOUNTED)) {
            deleteDir(context.getExternalCacheDir());
        }
    }

    /**
      * * 清除本应用内部缓存(/data/data/com.xxx.xxx/cache) * *
      *
      * @param context
      */
            

    public static void cleanInternalCache(Context context) {
         Log.e("DataCleanManager", "cleanInternalCache");
        deleteDir(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) {
         Log.e("DataCleanManager", "cleanDatabases");
        deleteDir(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) {
         Log.e("DataCleanManager", "cleanSharedPreference");
        deleteDir(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) {
         Log.e("DataCleanManager", "cleanFiles");
        deleteDir(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) {
         Log.e("DataCleanManager", "cleanExternalCache");
        if (Environment.getExternalStorageState().equals(
                                Environment.MEDIA_MOUNTED)) {
            deleteDir(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) {
        deleteDir(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);
        }
    }

    

    private static boolean deleteDir(File dir) {
        if (dir != null && dir.isDirectory()) {
            String[] children = dir.list();
            int size = 0;
            if (children != null) {
                size = children.length;
                for (int i = 0; i < size; i++) {
                    boolean success = deleteDir(new File(dir, children[i]));
                    if (!success) {
                        return false;
                    }
                }
            }

        }
        if (dir == null) {
            return true;
        } else {

            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";
        }

        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";
    }
}