Updated: 3/14/2014 - Version 1.05, This new version has 14 new functions/commands. Please report any issues. The new functions/commands are underlined and listed below in the updated docs.
Updated: 9/19/2013 - Version 1.04, Corrected an error in the Mid() function when retrieving the last character.
Updated: 8/28/2013 - Version 1.03, Added code to stop OutOfBounds error on the Mid Function. This would happen when an invalid index was passed to the function. Also corrected a bug that was in the DayOfMonth Function in versions prior to 1.02.
Updated: 4/5/2013 Added new date functions and a simple Encrypt and Decrypt Function. NOTE: A few older Functions were renamed.
StringFunctions use function names that are closer to the VB commands and may help beginners when they start programming in B4A. I wrote them for that reason when I started. These functions use to be in a code module but have now been converted to a Library. This has the new inline syntax and help as you start to type the command.
Requires B4A 2.5 or Higher
Copy the StringFunctions.jar and StringFunctions.xml to the Extra Libraries folder.
Be sure to DIM the Lib object like Below. You can use any variable name in place of sf in the Example below.
StringFunctions Version 1.05
Updated: 9/19/2013 - Version 1.04, Corrected an error in the Mid() function when retrieving the last character.
Updated: 8/28/2013 - Version 1.03, Added code to stop OutOfBounds error on the Mid Function. This would happen when an invalid index was passed to the function. Also corrected a bug that was in the DayOfMonth Function in versions prior to 1.02.
Updated: 4/5/2013 Added new date functions and a simple Encrypt and Decrypt Function. NOTE: A few older Functions were renamed.
StringFunctions use function names that are closer to the VB commands and may help beginners when they start programming in B4A. I wrote them for that reason when I started. These functions use to be in a code module but have now been converted to a Library. This has the new inline syntax and help as you start to type the command.
Requires B4A 2.5 or Higher
Copy the StringFunctions.jar and StringFunctions.xml to the Extra Libraries folder.
Be sure to DIM the Lib object like Below. You can use any variable name in place of sf in the Example below.
B4X:
Sub Globals
Dim sf As StringFunctions
sf.Initialize
End SubStringFunctions Version 1.05
- AsciiCodes
Displays a MessageBox with all Characters and their ASCII codes. - AddSpaces (HowMany As Int) As String
Returns a string of spaces. The number returned is set by HowMany. - At (YourString As String, SearchFor As String))
Returns the position of the SearchFor within YourString. - CurrentWeek (MyDate As String) As Int
Returns the number of the current week, 1-52 from the date passed to MyDate. - DayOfMonth (MyDate As ) As Int
Returns the day of the month like 1-31, from the date passed to MyDate. - Decrypt (YourText As String) As String
Converts an encrypted string of text to readable format, no key is needed. - Empty (StringText As String) As Boolean
Test to see if the string is empty and returns True if it is, otherwise returns False. - Encrypt (YourText As String) As String
Converts a string of text to simple encryption, no Key is needed. - EraseData
This will erase all data saved with the SaveData function stored in the
temporary vault. - FileExist (PathAndFileName As String) As Boolean
Returns True if the filename passed does exist, otherwise returns False.
Be sure to include the path like:
If FileExist("/mnt/sdcard/mydata.dat") Then MsgBox("Yes", "The Answer") - GetData (Key As Object) As Object
Gets data from the temporary vault.
EditText1.Text = SF.GetData("EnteredName")
The Key is case sensitive. - InString (YourString As String, SearchFor As String))
Returns the position of the SearchFor within YourString. - IsEmpty (StringText As String) As Boolean
Test to see if the string is empty and returns True if it is, otherwise returns False. - Left (StringText As String, Length As Long) As String
Returns the Left portion of a string with the number of characters passed
in Length. - Len (StringText As String) As Long
Returns the length of the string. - ListToString (YourList As List, Sorted As Boolean, Ascending As Boolean) As String
Converts a List object to a String. - ListToStringArray (YourList As List, Sorted As Boolean, Ascending As Boolean) As String()
Converts a List object to a String Array. - Lower (StringText As String) As String
Returns the string converted to Lowercase characters. - Ltrim (StringText As String) As String
Returns a new string with the leading spaces removed. - MB (Message As String)
Same as MsgBox but only needs one parameter. - Mid (StringText As String, Start As Int, Length As Int) As String
Returns the a new String for how ever many characters passed in Length from
a starting position passed in Start.
Example:
Mid("This is a long line of text", 5, 2)
In this example the function will Return: "is" - MidExtract (StringText As String, Start As String, EndAt As String) As String
Used to extract text from a string between to other blocks of text.
Ans = MidExtract("Dr. Jim Joe Brown", "Jim", "Brown") 'Returns: Joe
Ans = MidExtract("Dr. Jim [Joe] Brown", "[", "]") 'Returns: Joe - MidS (StringText As String, StartAt As Int) As String
Works like the Mid$ function in Visual Basic. - Month (MyDate As String) As Int
Returns the number of the current month 1-12 as Int type, from the date passed to MyDate. - MonthName (MyDate As String) As String
Returns the Name the current month as a String like January, etc., from the date passed to MyDate. - NewDate (DatePassed As String, HowManyDays As Int) As String
Returns a new date adding or subtracting HowManyDays. HowManyDays can be positive or
negative numbers. - NumOfDaysBetween (CurrentDate As String, OtherDate As String) As Int
Returns the numbers of days passed between the two dates passed. - Pad (Text As String, PadWith As String, Length As Int, Post As Boolean) As String
Used to pad a string with a selected character. If Post = True the padding will follow
any text in the string, if Post = False, the padding will be before the text. Length is
the total length for the padded string. PadWith is the selected character to use for the
padding.
SF.Pad("Jimmy Joe", "*", 20, True) 'Returns "Jimmy Joe***********" - Proper (StringText As String) As String
Returns the string in proper format.
Example:
MyText = "jim joe brown"
MyText = SF.Proper(Mytext)
This function will return: "Jim Joe Brown" - Replicate (mChar As String, Times As Int) As String
Repeats any character passed, a selected number of Times. - Right (StringText As String, Length As Long) As String
Returns the Right portion of a string with the number of characters passed
in Length. - RndChrGen (StringLength As Int, CharacterType As Int) As String
Returns a string of ramdom characters with a length specified by StringLength. CharacterType tells
the function what type of characters to return.
CharacterType = 0 for Upper and Lower case
CharacterType = 1 for Upper case only
CharacterType = 2 for Lower case only - Rtrim (StringText As String) As String
Returns a new string with the trailing spaces removed. - SaveData (Key As Object, Data As Object)
Save data passed in a temporary file.
SF.SaveData("ScreenTitle", MyVar)
or
SF.SaveData("EnteredName", EditText1.Text) - ScrInfo ( As Pect) As Int
Returns information about the devices screen. You can pass these parameters:
Pass "W" for Width
Pass "H" for Height
Pass "S" for Scale
Pass "D" for DPI
Call like: SF.ScrInfo("W") - SearchDate (Date1 As String, Date2 As String, DateRange As Int) As Boolean
Returns True if the Date1 and the Date2 are within x Days(DateRange) of each other.
Pass the dates as Strings.
Example:
SearchDate("03/01/2013", "02/15/2013", 30) - Split (CurrentString As String, Split_At_Delimiter As String) As List
Returns a LIST of items from the string split at the Delimiter.
EXAMPLE:
Dim ANS As List
ANS = SF.Split("This is a test string.", " ") - SplitGetWord (CurrentString As String, Split_At_Delimiter As String, GetElement As Int) As String
Returns just the one element selected with GetElement from the string.
EXAMPLE:
ANS = SF.SplitGetWord("This is a test string.", " ", 2)
In this example the function will Return: "is" - StrArraySort (StringArray() As String, Ascending As Boolean) As String()
Used to sort a String Array. Sort will be in Ascending order if Ascending = True. - StringArrayToList (StringArray() As String, Sorted As Boolean, Ascending As Boolean) As List
Converts a String Array to a List object. - StringToList (StringText As String, Sorted As Boolean, Ascending As Boolean) As List
Convert a String to a List object. This will split the string between words. - Stuff (CurrentText As String, InsertInString As String, RemoveFromString As String) As String
Used to replace text in a string with new text.
Example:
MyText = "I will tell you that joe is a good friend!"
MyText = SF.Stuff(MyText, "Joe Brown", "joe")
This function will return: "I will tell you that Joe Brown is a good friend!" - Today () As String
Returns the devices date. - Trim (Text As String) As String
Returns a new string with leading and trailing spaces removed. - Upper (StringText As String) As String
Returns the string converted to Uppercase characters. - Val (StringText As String) As Double
Returns the numerical value of a string. If the string contains now value it returns 0. - ValidDate (ChkDate As ) As Boolean
Returns True if the date passed is a Valid date. - WeekDay (MyDate As String) As String
Returns the number of the day of the week 1-7 as a String, from the date passed to MyDate. - WeekName (MyDate As String) As String
Returns the name of the day of the week like Sunday, Monday, etc., from the date passed to MyDate. - Year (MyDate As String) As String
Returns the year of the date passed in MyDate.
Example:
SF.Year("01/01/2013") returns "2013" - getSDCardPath () As String
Returns external/physical SD Card directory. This function may not return the correct store
on an Android OS above 4.1. This is due to changes made to the OS system in the newer versions.
Returns "", if the store can not be read. - iif (Value1 As String, Value2 As String, Value3 As String) As String
This is a single line if conditional test. If Value1 is true, Value2 is returned, otherwise
Value3 will be returned. Works with strings and booleans.
Example:
MsgBox(iif("Bob"="Jim", "They are the same", "They are not the same"), "The Answer")
or
MyBoolean = iif(FirstTime = True, StartMyService = True, StartMyService = False)
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