Android Question Hex to Decimal

imbault

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• Oct 12, 2015

• #2

You should use ByteConverter library
have a look on:
https://www.b4x.com/android/forum/threads/hexa-to-real-parsereal-string-int-as-real-in-ba4.22153/

 

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K

kaudie

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• Oct 12, 2015

• #3

It give me a negative value "-634528170". With an Internet-converter I get the correct value "3660439126".
Why is that?

 

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J

James Chamblin

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• Oct 12, 2015

• #4

It seems that ParseInt() will not work with values above $7FFFFFFF. I do know that $80000000 is greater than the maximum Int, but I would think that it would just simply roll the extra bit into the sign bit, just like this example

B4X:

    Dim Int_Number As Int = 0x80000000
    Log(Int_Number)

 

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J

James Chamblin

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• Oct 12, 2015

• #5

typed my reply at the same time as yours. The reason that it is negative is because the largest value that can be held by an Int is 2147483647 ($7fffffff). When you write a larger value to the Int, the extra bit is written to the sign bit, giving you a negative value. Anything larger than $FFFFFFFF will most likely be truncated to the lowest 32 bits.

 

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MaFu

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• Oct 12, 2015

• #6

Java doesn't know unsigned variables, only the signed types exist. Maybe using a Long instead an Int could help.

 

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