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Flutter Utils
2022-06-23 22:22:00 【Is paidaxing there】
00.1 Summary of tool classes in this library
Tool class | Functional specifications |
|---|---|
EventBusService | bus Event notification tool class , Subscriber mode is implemented . For communication between components |
CalculateUtils | Calculates the width of the text , high |
ColorUtils | Mainly is to RGB/ARGB Turn into 16 Hexadecimal string color or Color |
DateFormats | Common Chinese , English date and time conversion format . Contains the vast majority of date formats |
DateUtils | Date tool class , Get date time , Conversion between various times |
EncryptUtils | Encryption and decryption tool class , Mainly md5 encryption ,base64 Encryption and decryption , XOR encryption and decryption, etc |
ExtensionXxx | Expansion , contain int,list,map,set,num,string Other extension classes , There are most common methods of operation |
TransformUtils | Transformation tool class , contain int,string Convert to binary , Letter case conversion, etc |
ValidatorUtils | Verification tools , Contains common types , picture ,url, mailbox , Telephone , Resource file , Hump naming and other verification |
ExtensionXxx | Expansion , contain int,list,map,set,num,string Other extension classes , There are most common methods of operation |
TransformUtils | Transformation tool class , contain int,string Convert to binary , Letter case conversion, etc |
FileUtils | File cache class , It mainly stores and obtains strings ,Map,Json Data such as , Write locally file file |
TransformUtils | Transformation tool class , contain int,string Convert to binary , Letter case conversion, etc |
AppLocalizations | i18 relevant , You can set locale, Get string in language |
ImageUtils | Picture tool class , Mainly responsible for pictures and base64 conversion , Load network pictures , Toggle fillet , Round, etc |
JsonUtils | json Transformation tool class , Mainly responsible for list,map, Objects and json Conversion between |
get_it | spi Interface implementation , Interface （ Abstract base class ） Separate and decouple from the specific implementation |
LogUtils | Log tool class , Set log switch , length , And you can filter labels , Print 5 Types of logs |
NumUtils | Num Format tool class , Mainly responsible for num Related processing and conversion operations |
ObjectUtils | Object Superclass tool class , Be responsible for the judgment of various objects , Get length and other operations |
RegexConstants | Regular constants of common regular expressions , This part mainly refers to AndroidUtils |
RegexUtils | Regular expression tool class , Mainly by telephone , Id card , mailbox ,ip, Network etc. verification |
ScreenUtils | Screen tools , Get the width and height of the screen , And pixel density ratio |
SpUtils | sp Storage tool class , Suitable for storing lightweight data , Storage is not recommended json Long string |
TextUtils | Text tool class , Mainly deals with string abbreviations ,*, Compare , Remove and so on |
TimerUtils | Countdown timer tool class , Set total countdown time , Time interval between , Start pause, etc |
UrlUtils | url Tool class , obtain url Of host, Parameters , Verification and other operations |
SystemUtils | System tool class , Copy content to clipboard , Pop up and close the soft keyboard , Clear data, etc |
OtherUtils | RandomUtils Random tools ,SnackUtils,PlatformUtils Platform tool class |
MVP | Flutter Version of MVP Architecture template , To be perfected …… |
00.2 How to use this library
- Specific documents can be demo
01. Event notification bus Tool class
- Event bus
- Subscriber mode is usually implemented , The subscriber pattern includes two roles: publisher and subscriber .
- The first way ： Use map Collective storage key For events eventName,value by EventCallback Realization bus
// Register to listen bus
_subscription = EventBusService.instance.eventBus.on<EventMessage>().listen((event) {String name = event.eventName;
// The switching between front and rear stations has changed
if (name == "eventBus1") {var busMessage = event.arguments["busMessage"];
setState(() {message1 = busMessage;
});
}
});
// Send a message
EventBusService.instance.eventBus.fire(EventMessage(
"eventBus1",
arguments: {"busMessage": " send out bus news 1"},));
// Page destroy clear bus
if (_subscription != null) {_subscription.cancel();
_subscription = null;
}
- The second way ： Use StreamController Realization bus Event notification
// Register listening messages
bus.on("eventBus2", (arg) {var busMessage = arg;
setState(() {message2 = " receive messages ：" + busMessage;
});
});
// Send a message
var arg = " send out bus news 1";
bus.emit("eventBus2", arg);// Remove message
bus.off("eventBus2", (arg) {});
02. Color Color Tool class
- Color Color Tool class . Mainly is to RGB perhaps ARGB Convert color to Color object ,16 Hexadecimal color string, etc .
hexToColor : take #A357D6 Convert color to 16 It's binary Color
toColor : take #FF6325 Color or #50A357D6 Turn into 16 It's binary Color
colorString : take color Convert color to string
colorString : Check whether the string is hexadecimal
03. Date conversion tool class
- Date conversion tool class . Mainly to get the current date , Format the time in the specified format , And a variety of date formatting tools and methods
getNowDateTime : Get current date return DateTime
getYesterday : Get yesterday's date return DateTime
getNowUtcDateTime : Get current date return DateTime(utc)
getNowDateTimeFormat : Get current date , Returns the specified format
getUtcDateTimeFormat : Get current date , Returns the specified format
isYesterday : Judge whether it was yesterday according to the time
getNowDateMs : take # Gets the current millisecond value , return int
getNowDateString : Get current date string , The default is ：yyyy-MM-dd HH:mm:ss, Return string
formatDate : Format time , The first field is dateTime, The second option represents the format
formatDateString : Format date string , First field, for example ：'2021-07-18 16:03:10', The second field, for example ："yyyy/M/d HH:mm:ss"
formatDateMilliseconds : Format date millisecond time , First field, for example ：1213423143312, The second field, for example ："yyyy/M/d HH:mm:ss"
getWeekday : obtain dateTime What day is
getWeekdayByMilliseconds : Get the millisecond value corresponding to the day of the week
isToday : Determine whether it is today according to the timestamp
isYesterday : Judge whether it was yesterday according to the time
04.File File tool class
4.1 File storage utility class
- File storage utility class . Mainly storage and acquisition String,Json Wait for the documents , This is stored in file Local files
getTempDir : Get a temporary directory ( cache ), The system can be cleared at any time
getAppDocDir : Gets the directory of the application , Used to store files that only it can access . Only when the application is deleted , The system will clear the directory .
getAppFile : Initialization file path , By default, the directory of the selected application
readStringDir : Gets the data that exists in the file , Read the directory of the application by default
writeJsonFileDir : write in json file , Write to the directory of the application by default
writeStringDir : Using files to store strings , Write to the directory of the application by default
clearFileDataDir : Clear cached data
deleteFileDataDir : Delete cache file
writeJsonCustomFile : write in json file , Custom path
writeStringFile : Using files to store strings , Custom path
readStringCustomFile : Get the data stored in the custom path file
4.2 Document management tools
- Document management tools . Mainly create different directory paths , create a file , Or directory path .
getTempPath : Get the path to the temporary directory on the device , The directory is not backed up , A cache suitable for storing downloaded files .
getAppDocPath : Gets the directory of the application , Used to store files that only it can access . Only when the application is deleted , The system will clear the directory .
getStoragePath : The path to the directory where the application can access the top-level storage
createDirSync : Create files asynchronously
createDir : Create files synchronously
createTempDir : Create temporary directory
createAppDocDir : Create a directory to get applications
05.Sql Database tool class
- To be improved
06.Json Transformation tool class
- Json Transformation tool class .json Convert common operations , Gradually improve list,map and json String conversion, etc .
printJson : pure Json Format output print
printJsonEncode : pure Json Format output print
encodeObj : Put the object [ value ] Convert to JSON character string
getObj : transformation JSON String to object
getObject : transformation JSON String or JSON mapping [ Source ] To the object
getObjList : transformation JSON String list [ Source ] To object list
getObjectList : transformation JSON String or JSON Mapping list [ Source ] To object list
07.Log Log printing tool class
- Log Log printing tool class . Five different types of logs , You can also add tag Tag filtering .
init : Initialize log , Customize tag, Whether it is debug Environmental Science , Maximum log length , These fields are not required
d : Print debug journal
e : Print error journal
v : Print v journal
i : Print info journal
w : Print ware Warning log
08. Screen parameter tool class
- Screen parameter tool class . Get the width of the screen , high , Pixel density , Properties such as status bar . Improvement and adaptation in the later stage ……
screenWidthDp : Current device width dp
screenHeightDp : Current device height dp
pixelRatio : Pixel density of the device
screenWidth : Current device width px = dp * density
screenHeight : Current device height px = dp * density
statusBarHeight : Status bar height dp Liu Haiping will be higher
bottomBarHeight : Bottom safety zone distance dp
textScaleFactory : Number of font pixels per pixel , Font scaling
09.Sp Lightweight storage tools
- sp Lightweight storage tools . Mainly sp Store and get int,String,list,map And so on .
init : initialization , You have to initialize
hasKey : Judge whether it exists key The data of
putObject : Storage object Type data
getObject : obtain sp in key Of map data
putObjectList : Storage sp in key Of list aggregate
getObjectList : obtain sp in key Of list aggregate
getString : obtain sp in key String
putString : Storage sp in key String
getBool : obtain sp in key Boolean value
putBool : Storage sp in key Boolean value
getInt : obtain sp in key Of int value
putInt : Storage sp in key Of int value
getDouble : obtain sp in key Of double value
putDouble : Storage sp in key Of double value
getStringList : obtain sp in key Of list<String> value
putStringList : Storage sp in key Of list<String> value
getStringMap : obtain sp in key Of map value
putStringMap : Storage sp in key Of map value
getDynamic : obtain sp in key Of dynamic value
getKeys : obtain sp All of the key
remove : remove sp in key Value
clear : eliminate sp
isInitialized : Check initialization
forEach : Traversal print sp Of key and value
11. Encryption and decryption tool class
- Encryption and decryption tool class . At present, we support base64 encryption ,md5 encryption . Later, gradually improve more encryption methods ……
encodeMd5 : md5 Encrypted string , This is irreversible
encodeBase64 : Base64 Encrypted string
decodeBase64 : Base64 Decrypt string
xorBase64Encode : XOR symmetry Base64 encryption
xorBase64Decode : XOR symmetry Base64 Decrypt
12.Num Format processing tool class
- Format processing tool class . Mainly dealing with num Format conversion related operations .
isNum : The check string is int still double
getIntByValueString : Convert numeric string to int. If the string is not a number , It's translated into 0
getDoubleByValueString : Number string to double. If the string is not a number , It's translated into 0
getNumByValueString : Convert numeric string to num, Number retention x Decimal place
getNumByValueDouble : Floating point number retention x Decimal place
addNum : Add two numbers （ Prevent loss of accuracy ）
subtractNum : Subtract two numbers （ Prevent loss of accuracy ）
multiplyNum : Multiplication of two numbers （ Prevent loss of accuracy ）
divideNum : Divide two numbers （ Prevent loss of accuracy ）
addDecString : Add two numbers （ Prevent loss of accuracy ）
subtractDecString : Subtract two numbers （ Prevent loss of accuracy ）
multiplyDecString : Multiplication of two numbers （ Prevent loss of accuracy ）
divideDecString : Divide two numbers （ Prevent loss of accuracy ）
14. Image processing tool class
- Others to be improved , Supplementary fillet , Circular cutting picture , And how to deal with local images . Later, improve the image properties , Picture compression , Various tangent angle methods .
base64ToImage : take base64 Convert stream to picture
fileToBase64 : The picture file Turn into base64
networkImageToBase64 : Convert web link pictures to base64
assetImageToBase64 : take asset The picture is translated into base64
showNetImageWh : Load network pictures , And specify the width and height size . Use default preload loading And error view
showNetImageWhError : Load network pictures , And specify the width and height size . Incoming error view
showNetImageWhPlaceError : Load network pictures , And specify the width and height size . Incoming preload , Wrong view
showNetImageWhClip : Load network pictures , And specify the width and height size , Cut the fillet
showNetImageCircle : Load network pictures , Cut round picture
15. Network processing tools
15.1 Network request tool class
15.2 Url Parsing tool class
- Handle url Parsing related tool classes
containsTarget : Judge url Does the link contain parameters
getFirstPath : obtain url The first parameter in
getUrlHost : obtain url In the link host
getUrlScheme : obtain url In the link scheme
getFirstPath : obtain url The first parameter in
isURL : Returns whether the input matches url Regular expression of
16. Common regular tool classes
- Common regular expressions , reference AndroidUtils Tool class , take java To dart
isMobileSimple : Simple verification of mobile phone number
isMobileExact : Accurate verification of mobile phone number
isTel : Verify phone number
isIDCard15 : Verification of id card number 15 position
isIDCard18 : Simply verify ID number. 18 position
isIDCard18Exact : Accurate identification ID number 18 position
isEmail : Verify email
isURL : verification URL
isZh : Verify Chinese characters
isUsername : Verify user name
isDate : verification yyyy-MM-dd Format date verification , A flat leap year has been considered
isIP : verification IP Address
match : Determine whether to match regular
RegexConstants.REGEX_DOUBLE_BYTE_CHAR : Double byte
RegexConstants.REGEX_BLANK_LINE : Blank line
RegexConstants.REGEX_QQ_NUM : QQ Number
RegexConstants.REGEX_CHINA_POSTAL_CODE : Zip code
RegexConstants.REGEX_INTEGER : Integers
RegexConstants.REGEX_POSITIVE_INTEGER : Positive integer
RegexConstants.REGEX_NEGATIVE_INTEGER : Negtive integer
RegexConstants.REGEX_NOT_NEGATIVE_INTEGER: Non-negative integer
RegexConstants.REGEX_NOT_POSITIVE_INTEGER: Non positive integer
RegexConstants.REGEX_FLOAT : Floating point numbers
RegexConstants.REGEX_POSITIVE_FLOAT : Positive floating point
RegexConstants.REGEX_NEGATIVE_FLOAT : Negative floating point number
RegexConstants.REGEX_NOT_NEGATIVE_FLOAT : Nonnegative floating point number
RegexConstants.REGEX_NOT_POSITIVE_FLOAT : Non positive floating point number
17.Object Common tools
- Object Relevant tools are as follows ：
isNull : Judge whether the object is null
isNullOrBlank : Check whether the data is empty or empty ( Empty or contain only spaces )
isEmptyString : Determines if the string is empty
isEmptyList : Determines if the set is empty
isEmptyMap : Judge whether the dictionary is empty
isEmpty : Judge object Whether the object is empty
isNotEmpty : Judge object Whether it is not empty
compareListIsEqual : Compare whether the two sets are the same
getLength : obtain object The length of
18. Verify related tool classes
- Verify related tool classes
isNumericOnly : Check whether the string contains only numbers
isAlphabetOnly : Check if the string contains only letters .( There are no spaces )
isBool : Check whether the string is Boolean
isVector : Check string Is it vector file
isImage : Check whether the string is an image file
isAudio : Check whether the string is an audio file
isVideo : Check whether the string is a video file
isTxt : Check whether the string is txt text file
isDocument : Check whether the string is doc file
isExcel : Check whether the string is excel file
isPPT : Check whether the string is ppt file
isAPK : Check whether the string is apk file
isPDF : Check whether the string is pdf file
isHTML : Check whether the string is html file
isURL : Check whether the string is url file
isEmail : Check whether the string is email file
isDateTime : Check whether the string is time
isMD5 : Check whether the string is md5
isSHA1 : Check whether the string is sha1
isSHA256 : Check whether the string is sha256
isIPv4 : Check whether the string is ipv4
isIPv6 : Check whether the string is ipv6
isPalindrome : Check if the string is palindrome
isCaseInsensitiveContains : Check a Does it include b( Treat large and small initials as the same or explain ).
isCaseInsensitiveContainsAny : Check a Include in b or b Include in a( Treat large and small initials as the same ).
isCamelCase : Check the string value for hump case
isCapitalize : Check whether the string value is capitalized
19. Routing management tool class
21.Text Text tool class
- Text related tool classes are as follows ：
isEmpty : Judge whether the text content is empty
isNotEmpty : Judge whether the text content is not empty
startsWith : The judgment string is xx start
contains : Determine whether the string contains xx
abbreviate : Use dot abbreviation string
compare : Compare two strings for the same
hammingDistance : Comparing two strings of the same length has several different characters
formatDigitPattern : every other x position Add pattern. For example, it is used to format bank cards
formatSpace4 : every other 4 Bit plus space
hideNumber : Hide the middle of mobile phone number n position , For example, hide your mobile phone number 13667225184 by 136****5184
replace : Replace data in string
split : Cut strings according to rules , Returns an array of
reverse : Reverse string
22.i18 Expanding tools
- LocatizationExtensionState Class ：String getString(String id)
- Get different Locales Channel language content . give an example ： Use ：var name = context.getString("name");
- LocatizationExtensionContext Class ：String getString(String id)
- Get different Locales Channel language content
- How to add language content from different channels . Written in main Function runApp Before
AppLocalizations.supportedLocales = [
const Locale('en', 'US'), const Locale('pt', 'BR'), const Locale('ja', 'JP'), const Locale('zh', 'CN'),];
23.Time Time tools
24.SPI Help tools
- spi Brief introduction
- Service Locator The interface can be （ Abstract base class ） Separate and decouple from the specific implementation , At the same time, it is allowed to receive data from App Access specific implementations from anywhere in the .
// The first step is to register
GetIt serviceLocator = GetIt.instance;
getIt.registerSingleton<BusinessService>(new BusinessServiceImpl());
// Step 2 use
BusinessService businessService = serviceLocator<BusinessService>();
businessService.noneBusinessPattern();
// Step 3 unbind
serviceLocator.resetLazySingleton<BusinessService>();
25. Timer helper class
- Timer helper class
TimerUtils : Create countdown timer
setTotalTime : Set total countdown time
setInterval : Set up Timer interval
startTimer : Start timing Timer
updateTotalTime : Reset total countdown time
isActive : Judge Timer Whether to start
pauseTimer : Pause countdown timer
cancel : Cancel the timer
setOnTimerTickCallback : Set the listening of the countdown timer
26. Common development tools
26.1 int Expansion ：ExtensionInt
- ExtensionInt Expansion
isPalindrome : Check int Is it palindrome
isOneAKind : Check that all data has the same value
toBinary : transformation int The value is binary
toBinaryInt : transformation int The value is binary int
fromBinary : transformation int The value is a binary string
26.2 List Expansion ：ExtensionList
- ExtensionList Expansion
toJsonString : take list Turn into json character string
getJsonPretty : take list Turn into json character string , Line break
valueTotal : obtain num Total value of the list (int/double)
isNull : Judge whether the object is null
isNullOrBlank : Check whether the data is empty or empty ( Empty or contain only spaces )
26.3 Map Expansion ：ExtensionMap
- ExtensionMap Expansion 【set Extended class isomorphism 】
toJsonString : take map Turn into json character string
getJsonPretty : take map Turn into json String wrap
isNull : Judge whether the object is null
isNullOrBlank : Check whether the data is empty or empty ( Empty or contain only spaces )
26.4 String Expansion ：ExtensionString
- ExtensionString Expansion
isNull : Judge whether the object is null
isNullOrBlank : Check whether the data is empty or empty ( Empty or contain only spaces )
isNumericOnly : Check whether the string contains only numbers
isAlphabetOnly : Check if the string contains only letters .( There are no spaces )
isBool : Check whether the string is Boolean
isVector : Check string Is it vector file
isImage : Check whether the string is an image file
isAudio : Check whether the string is an audio file
isVideo : Check whether the string is a video file
isTxt : Check whether the string is txt text file
isDocument : Check whether the string is doc file
isExcel : Check whether the string is excel file
isPPT : Check whether the string is ppt file
isAPK : Check whether the string is apk file
isPDF : Check whether the string is pdf file
isHTML : Check whether the string is html file
isURL : Check whether the string is url file
isEmail : Check whether the string is email file
isDateTime : Check whether the string is time
isMD5 : Check whether the string is md5
isSHA1 : Check whether the string is sha1
isSHA256 : Check whether the string is sha256
isIPv4 : Check whether the string is ipv4
isIPv6 : Check whether the string is ipv6
isPalindrome : Check if the string is palindrome
isCaseInsensitiveContains : Check a Does it include b( Treat large and small initials as the same or explain ).
isCaseInsensitiveContainsAny : Check a Include in b or b Include in a( Treat large and small initials as the same ).
isCamelCase : Check the string value for hump case
isCapitalize : Check whether the string value is capitalized
33. Transform related tool classes
- Conversion related operation tool classes
toBinary : transformation int The value is binary , such as ：15 => 1111
toBinaryInt : transformation int The value is binary
fromBinary : Convert binary to int value
capitalize : Every word in the string should be capitalized
capitalizeFirst : Capitalize the first letter of the string , Other letters are lowercase
removeAllWhitespace : Delete all spaces in the string
numericOnly : Extract the numeric value of the string
34. Global exception capture tool
- in the light of flutter Global exception capture , have access to ：handle_exception
// If you use , stay main In the method , As shown below ：
hookCrash(() {runApp(MainApp());
});
- Capture a printout ：
I/flutter ( 9506): yc e — — — — — — — — — — st — — — — — — — — — — — — —
I/flutter ( 9506): yc e | handle_exception : e---->MissingPluginException(No implementation found for method getAll on channel plugins.flutter.io/shared_
I/flutter ( 9506): yc e | preferences)
I/flutter ( 9506): yc e — — — — — — — — — — ed — — — — — — — — — ---— —
I/flutter ( 9506): yc e handle_exception : stack---->
35. Parse data tool class
- analysis xml/html Data tools
36. Byte conversion tool class
- ByteUtils Conversion related operation tool classes
toBinary : transformation int The value is binary
toReadable : Convert a byte array to a readable string
toBase64 : Convert byte array to base64 character string
fromBase64 : transformation base64 String to byte array
clone : Clone byte array
same : Determine whether the two bytes are the same
extract : Extract data from a sequence of bytes
combine : Splice two bytes
insert : Inserts a byte at an index
remove : Remove bytes at an index
40. Other related tools
40.2 Random tools
- RandomUtils
randomColor : Generate a random integer representing hexadecimal color
randomString : Generates a random string of a specified length or a random length
randInt : Generate a random number between the beginning and the end
randomElement : Returns a random element from the list
40.3 Get platform tool class
- PlatformUtils. The tool class can obtain the platform , Then set up a value Differentiated platform information .
final value = PlatformUtils.select(
ios: "ios",
android: "android",
web: "web",
fuchsia: "fuchsia",
macOS: () => "macOS",
windows: () => "windows",
linux: () => "linux",
);
// result , stay Android On the device ,value Namely ：android
40.4 Cutting board tools
- System tool class , Mainly soft keyboard operation and copying content to the clipboard
copyToClipboard : Copy text content to clipboard
hideKeyboard : Hide soft keyboard , Specific to see ：TextInputChannel
showKeyboard : Display soft keyboard
clearClientKeyboard : Clear data
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