Android Question Can't get integer from file?

[dimitristsilis]

Hello everyone! I'm using b4a trial 5.20.
The problem: I want to get the integer "2" from the first line of a .txt file, but...
If I write:

Dim number1 As Int
  number1 = "2"
log(number1)

Everything is ok. If I write:

Dim line As String  
line = TextReader1.ReadLine  
TextReader1.Close  

Dim number1 As Int
  number1 = line
log(number1)

it throws an exception: java.lang.NumberFormatException: Invalid double: "2"
"2" is the number that the text file contains. There is only this number in the file, nothing else.
What could be the problem? Thanks for reading!

 

[DonManfred]

"2" is not an int. It is a string containing a quote, a 2 and another quote.
You need to remove the quotes to cast it as an int. Or even just write a simple 2 to the file (without quotes)

 

[dimitristsilis]

Sorry, my bad! I just used the quotes to show that 2 is the integer and not some random number... I never used the quotes in the code, nor in the file!

 

[Computersmith64]

The other option is you can cast the variable like this:

Dim line AsString 
line = TextReader1.ReadLine 
TextReader1.Close 

Dim number1 As Int
number1 = cInt(line)
log(number1)

Private Sub cInt(o as Object) as Int
    Return Floor(o)
End Sub

 

[dimitristsilis]

It worked! Many thanks Computersmith64!