Android Question Appending Bytes from multiple JPEG's

JordiCP

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• Apr 28, 2016

• #2

I would use a canvas and draw both pictures in it, arranged as you want (horizontally or vertically)

 

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Erel

B4X founder

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• Apr 28, 2016

• #3

Appending the bytes to an existing files will not work. It will just create a corrupted image. As @JordiCP wrote you should use Canvas to draw the bitmaps and then save the Canvas bitmap.

 

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Tyler

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• Apr 30, 2016

• #4

So, same concept but using canvas? Something to the affect of

B4X:

Canvas1.Bitmap.WriteToStream(Image A params)
Canvas1.Bitmap.WriteToStream(Image B params)

Would work?

Thanks again for the replies

 

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KMatle

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Longtime User

• Apr 30, 2016

• #5

The trick is to "paint" both pictures on one canvas and the store the canvas as one new picture containing both.

A JPG is a structured data object. You cant just append some bytes to an existing. Merging two jpg's bytewise will need a deep knowlege of the jpeg format: https://en.wikipedia.org/wiki/JPEG

 

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