Android Question Inline Java

[Jmu5667]

Hi

this code does not compile.

#If JAVA
   public String ByteArrayToHexString(byte [] inarray)
   
     {
   
    int i, j, in;
    String [] hex = {"0","1","2","3","4","5","6","7","8","9","A","B","C","D","E","F"};
    String out= "";

    For(j = 0 ; j < inarray.length ; ++j)
       {
    in = (int) inarray[j] & 0xff;
    i = (in >> 4) & 0x0f;
    out += hex[i];
    i = in & 0x0f;
    out += hex[i];
    }
    Return out;
   }
#End If

I get the following error:

All help appreciated.

Regards

John.

 

[Informatix]

for not For

 

[Jmu5667]

Thanks, not used to Java syntax, everything is lower case

 

[Erel]

BTW, you can use ByteConverter to convert an array of bytes to a hex string.

It should also be simple to convert this code to B4A (don't use this Java code. It will work very bad with non-small arrays).

 

[Informatix]

It will work very bad with non-small arrays).

Erel is right. Your code creates a new string for each "out += ". With a large array, that will be very slow and not memory-efficient. If you want to concatenate a long string, uses a StringBuilder (in Java or in B4A).

 

[Jmu5667]

Hi Erel

I am trying to convert, android.nfc.extra.ID=[B@41ad7298, to the UID as I am experiencing problems with the NFC record reader when I store GPS data and some text in a tag. I have also used a combination of UltraLight & MifareUltralight. with MifareUltralight when reading a page it seems to read for then 4 bytes per page.

So I am trying to understand the data so I can read it manually.

We have a project to scan many different tags types and store them in an SQL server so a presentation windows app can display the data.

Regards

John.

 

[Erel]

Use ByteConverter.HexFromBytes to convert the array.