Android Question How many characters are in one line?

[ArminKH]

hi all
i have 2 question plz help me
question 1:
how i can return the lenght of characters in a line?
my string is multi line but i want know how many char is in any line
for example in this text:
Line 1-"This is test"
Line 2-"This is"

in line 1 i have 12 character and in line 2 i have 7 character
is there any way to calculate and return this numbers?

question 2:
i want return the width of any line of a multiline
i know this possible with canvas.measurestringwidth
but when we have for example 3 word in 3 line(with CRLF)
how we can know what is the width of line 2?
and may be need to understand how many line we have

plz help

tnx

 

[Straker]

You know how to measure a single line.
Now you have a multiline, a string in which each line is separated from the others wit a crlf.

You just have to split the multiline. For example you can transform it in a list in which each entry is a single line.

You can easily do it with RegEx (regular expression)
Just search 'split regex' or 'split function' and you'll find some example.

 

[Straker]

Look here http://www.b4x.com/android/forum/threads/23925/#content

 

[ArminKH]

ok but if our text be in label and we dont use CRLF then can we split each line in separate line?

 

[Straker]

Mmmmmh... I don't think it's easy (but I'm a newbie with b4a so maybe the solution is something I don't know).

I too would like to know if there is a simple way to count the lines in word wrapped label.

Anyway, I suppose you need this information just to adapt the font size in relation with the label's size, just to have a better visualization on different display.
In this case you can use some libraries. See the following links:

http://www.b4x.com/android/forum/threads/label-utils.39338/#content
http://www.b4x.com/android/forum/threads/30642/#content

 

[ArminKH]

Tnx i see
I have my own formul like that
Ok dear straker i hope erel see this question tnx again

 

[sorex]

you can use regex.split to split the text into lines based on the linefeed.

then you can loop throught the array and use variable length.

Dim t As String
Dim lines() As String
t="This is test" & Chr(13) & Chr(10) & "This is"
lines=Regex.Split(Chr(13)&Chr(10),t)
For x=0 To lines.Length-1
Log(lines(x)&" : "&lines(x).Length)
Next

output:

** Activity (main) Create, isFirst = true **
This is test : 12
This is : 7
** Activity (main) Resume **

 

[ArminKH]

Its true but we dont know what is the label text
I just tell that is an example and string can be different after user run program

 

[sorex]

then you use

t=edittext.text

 

[ArminKH]

Then i regex with which character?

 

[sorex]

the regex will remain the same if you want to split on linefeeds

t=edittxt.text 'or label1.text whatever
lines=Regex.Split(Chr(13)&Chr(10),t)

 

[ArminKH]

Ok tnx i will test that