Android Question How to convert bitmap to raw byte[] ?

[Marcob]

Hi,

I'm aware that a bitmap can be converted to a compressed PNG/JPEG data array for example by using bitmap.WriteToStream(). Does a way for getting just an uncompressed data array from a bitmap exist?

 

[MarkusR]

from docu, the lib BitmapExtended can do this or maybe BitmapCreator

https://www.b4x.com/android/forum/t...eator-pixels-drawings-and-more.92050/#content

 

[Marcob]

from docu, the lib BitmapExtended can do this

Thank you MarkusR, I'll try getPixels(bmp,dst,0,bmp.Width,0,0,bmp.Width,bmp.Height) from BitmapExtended lib

 

[Star-Dust]

Public Sub BitmapToByte (SourceBitmap As Bitmap) As Byte()
    Dim mBuffer() As Byte
    Dim jo As JavaObject = SourceBitmap
    Dim format As Object = jo.RunMethod("getConfig", Null)
    If "ARGB_8888" <> format Then
        Log("Unsupported format: " & format)
        Return
    End If
    Dim bf As JavaObject
    bf = bf.InitializeStatic("java.nio.ByteBuffer").RunMethodJO("wrap", Array(mBuffer))
    jo.RunMethod("copyPixelsToBuffer", Array(bf))
    Return mBuffer
End Sub

 

[Erel]

You should use BitmapCreator for this.