B4A Library [B4X] BytesBuilder - simplifies working with arrays of bytes

Erel

Administrator
Staff member
Licensed User
Edit: BytesBuilder is included in B4XCollections library (named B4XBytesBuilder).

BytesBuilder class, which is compatible with B4A, B4i and B4J, makes it easier to work with bytes.
You can think of it as a combination of String and StringBuilder, but instead of holding characters it holds bytes.

Modifying the stored data is done with:
  • Append - Adds data at the end.
  • Insert - Inserts data at the given index.
  • Set - Replaces data starting from the given index
  • Remove - Removes the data in the given range.
  • Clear - Clears the data.
Note that the internal buffer grows automatically as needed.

Reading the data is done with:
  • SubArray / SubArray2 - Similar to String.SubString
  • ToArray - Similar to StringBuilder.ToString. Returns a complete copy of the data.
  • IndexOf / IndexOf2 - Similar to String.IndexOf

Dependencies:
B4A, B4J - ByteConverter
B4i - iRandomAccessFile

Example:
B4X:
Dim bb As BytesBuilder
bb.Initialize
For i = 0 To 255
   bb.Append(Array As Byte(i))
Next
bb.Insert(1, Array As Byte(0xFF, 0XFF, 0xFF))
Log(bb.IndexOf(Array As Byte(10, 11, 12)))
Log(bb.IndexOf(Array As Byte(0)))
Log(bb.IndexOf2(Array As Byte(0xFF), 3))
Dim bc As ByteConverter
Log(bc.HexFromBytes(bb.ToArray))
Log(bc.HexFromBytes(bb.SubArray2(250, 300)))
 
Last edited:

Beja

Expert
Licensed User
BytesBuilder class, which is compatible with B4A, B4i and B4J, makes it easier to work with bytes.
You can think of it as a combination of String and StringBuilder, but instead of holding characters it holds bytes.

Modifying the stored data is done with:
  • Append - Adds data at the end.
  • Insert - Inserts data at the given index.
  • Set - Replaces data starting from the given index
  • Remove - Removes the data in the given range.
  • Clear - Clears the data.
Note that the internal buffer grows automatically as needed.

Reading the data is done with:
  • SubArray / SubArray2 - Similar to String.SubString
  • ToArray - Similar to StringBuilder.ToString. Returns a complete copy of the data.
  • IndexOf / IndexOf2 - Similar to String.IndexOf

Dependencies:
B4A, B4J - ByteConverter
B4i - iRandomAccessFile

Example:
B4X:
Dim bb As BytesBuilder
bb.Initialize
For i = 0 To 255
   bb.Append(Array As Byte(i))
Next
bb.Insert(1, Array As Byte(0xFF, 0XFF, 0xFF))
Log(bb.IndexOf(Array As Byte(10, 11, 12)))
Log(bb.IndexOf(Array As Byte(0)))
Log(bb.IndexOf2(Array As Byte(0xFF), 3))
Dim bc As ByteConverter
Log(bc.HexFromBytes(bb.ToArray))
Log(bc.HexFromBytes(bb.SubArray2(250, 300)))
The class is attached.
Wow! That's the class b4x was missing.
Thanks Erel .. You don't stop surprising us with new useful tools .all thumps up!
 
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