Well, there's a few way to do it.
But I'll only explain how I did it.
First, use 7zip to open framework-res.apk and go to res/drawable-nodpi ( if I'm not wrong ) and look for a image, named holo dark background ( I don't really remember the name, but it supposed to be holo_dark_XXXXX.png/jpg ) and you can download any image and named it same as the holo dark background name, and replace it. Just in case you want my image ( the cybertron image ) , I can provide it to you.
Good luck. I hope you understand what I'm talking about because I'm kinda rush here, I got no time to elaborate too much.
Thank you @limyuyang
In fact, when I looked at your screenshots it was on a mobile phone, I had not seen that the texture was the texture of the background of the menus :silly:, not that of the chart only.
But the info is interesting and will serve me. Thank you again :good:
In fact, I do not know if a thread on this topic exists on xda, but it would be interesting to have a database to know what is the purpose of each image. There are an impressive number of images in the applications which is never seen on the phone screen.
Maybe someone knows a link?
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