B4J Question [SOLVED],[BANano], Help me with banano.GetFileAsArrayBuffer

Mashiane said:

Try...

Dim TempArr As Object = Banano. Await(banano.GetFileAsArrayBuffer("./assets/biendong8.sea",Null))
Log(TempArr)

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alwaysbusy said:

Are you sure 'biendong8.sea' exists (and did you pressed the sync button in the IDE?) because this should work. Also, this has to run from a real Web Server else you will get a CORS error.

Alwaysbusy

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Mashiane said:

Try...

Dim TempArr As Object = Banano. Await(banano.GetFileAsArrayBuffer("./assets/biendong8.sea",Null))
Log(TempArr)

Click to expand...

1. ArrayBuffer(30408000)
   1. byteLength: 30408000
   2. [[Prototype]]: ArrayBuffer
   3. [[Int8Array]]: Int8Array(30408000)
   4. [[Uint8Array]]: Uint8Array(30408000)
   5. [[Int16Array]]: Int16Array(15204000)
   6. [[Int32Array]]: Int32Array(7602000)
   7. [[ArrayBufferByteLength]]: 30408000
   8. [[ArrayBufferData]]: 48

Mashiane said:

What are you trying to achieve by using GetFileAsArrayBuffer?

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Dim TempArr() As Byte
File.WriteBytes(Dir, "biendong8.sea", TempArr)

Dim TempArr() As Byte = File.ReadBytes(File.DirAssets, "biendong8.sea")
Log(TempArr(1000))

Dim TempArr As Object = Banano. Await(banano.GetFileAsArrayBuffer("./assets/biendong8.sea",Null))
Dim TestArr() as Byte = TempArr
Log(TestArr(1000))

alwaysbusy said:

Try the following (I used an image file here, but it should work with your type of file too):

ArrayBuffers in JavaScript are 'raw' data and have to be accessed with a 'view'. This view can be a Uint8Array, a Uint16Array, a Uint32Array or a Float64Array
In your case, I believe you need a Uint8Array.

B4X:

Dim GetFileArr As ResumableSub = BANano.GetFileAsArrayBuffer("./assets/banano.jpg",Null)
wait for (GetFileArr) Complete (TempArr As Object)
 
' create a Uint8Array 'view' (an array of bytes)
Dim Uint8View As BANanoObject
Uint8View.Initialize2("Uint8Array", TempArr)
Dim bytes() As Byte = Uint8View ' convert it to a B4J byte array so we can access it more easily
 
Log(bytes(1000))

Alwaysbusy

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