com.alivc.live.utils

Class FileUtil

java.lang.Object

com.alivc.live.utils.FileUtil

public class FileUtil
extends java.lang.Object

Android文件工具类

Method Summary

Modifier and Type	Method and Description
static java.lang.String	combinePaths(java.lang.String... varargs) Combine paths
static byte[]	createChecksum(java.lang.String filename) see this How-to for a faster way to convert a byte array to a HEX string
static boolean	fileExists(java.lang.String path) Check if file exists
static boolean	folderExists(java.lang.String path) Check if folder exists
static java.lang.String	getExternalCacheFolder(android.content.Context context) Get external cache folder from sd card
static java.lang.String	getExternalFileFolder(android.content.Context context) Get external file folder from sd card
static java.lang.String	getFolderPath(java.lang.String path) Get parent folder absolute path
static java.lang.String	getInternalCacheFolder(android.content.Context context) Get internal cache folder from sd card
static java.lang.String	getInternalFileFolder(android.content.Context context) Get internal file folder from sd card
static java.lang.String	getMD5Checksum(java.lang.String filename) see this How-to for a faster way to convert a byte array to a HEX string
static java.util.ArrayList<java.io.File>	listAllFiles(java.io.File file, boolean includeFolder) list all files
static java.util.ArrayList<java.lang.String>	readLinesFromFile(java.io.File file) read lines from file
static java.lang.String	readTextFromFile(java.io.File file)
static void	safeCreateFolder(java.lang.String path) Create folder if not exists If the target is a file, remove it and then create folder.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

fileExists

public static boolean fileExists(java.lang.String path)

Check if file exists

Parameters:

path - file path

Returns:

true->exists, false->not exist

folderExists

public static boolean folderExists(java.lang.String path)

Check if folder exists

Parameters:

path - folder path

Returns:

true->exists, false->not exist

getFolderPath

public static java.lang.String getFolderPath(java.lang.String path)

Get parent folder absolute path

Parameters:

path - file path

Returns:

parent folder absolute path

safeCreateFolder

public static void safeCreateFolder(java.lang.String path)

Create folder if not exists

If the target is a file, remove it and then create folder.

Parameters:

path - folder path

getInternalCacheFolder

public static java.lang.String getInternalCacheFolder(android.content.Context context)

Get internal cache folder from sd card

Parameters:

context - android context

Returns:

internal cache folder from sdcard

getExternalCacheFolder

public static java.lang.String getExternalCacheFolder(android.content.Context context)

Get external cache folder from sd card

Parameters:

context - android context

Returns:

external cache folder from sdcard

getInternalFileFolder

public static java.lang.String getInternalFileFolder(android.content.Context context)

Get internal file folder from sd card

Parameters:

context - android context

Returns:

internal file folder from sdcard

getExternalFileFolder

public static java.lang.String getExternalFileFolder(android.content.Context context)

Get external file folder from sd card

Parameters:

context - android context

Returns:

external file folder from sdcard

combinePaths

public static java.lang.String combinePaths(java.lang.String... varargs)

Combine paths

Parameters:

varargs - path list

Returns:

combined absolute path

createChecksum

public static byte[] createChecksum(java.lang.String filename)
                             throws java.lang.Exception

see this How-to for a faster way to convert a byte array to a HEX string

Parameters:

filename - file name

Returns:

md5 byte buffer

Throws:

java.lang.Exception

getMD5Checksum

public static java.lang.String getMD5Checksum(java.lang.String filename)

see this How-to for a faster way to convert a byte array to a HEX string

Parameters:

filename - file name

Returns:

md5 string

listAllFiles

public static java.util.ArrayList<java.io.File> listAllFiles(java.io.File file,
                                                             boolean includeFolder)

list all files

Parameters:

file - file folder

includeFolder - includeFolder

Returns:

all files

readLinesFromFile

public static java.util.ArrayList<java.lang.String> readLinesFromFile(java.io.File file)

read lines from file

Parameters:

file - file

Returns:

file lines

readTextFromFile

public static java.lang.String readTextFromFile(java.io.File file)