[Solved]Custom Splash galaxy a5. Help me how to modify it. - Android Q&A, Help & Troubleshooting

Hi friends, I need help on how to change the splash screen on my galaxy a5 because I am bored seeing the same bootup logo everytime. Thanks

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I've used hex editor to change boot logo on a few samsung devices. It can also be done with script if you're good at it. I'm not [emoji14]
You need to locate the logo.jpg inside param partition, and with hex editor you can insert/overwrite the original with a new logo.jpg with exact same resolution,dpi, and size as the original.

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tys0n said:
I've used hex editor to change boot logo on a few samsung devices. It can also be done with script if you're good at it. I'm not [emoji14]
You need to locate the logo.jpg inside param partition, and with hex editor you can insert/overwrite the original with a new logo.jpg with exact same resolution,dpi, and size as the original.
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Yeah, but how can I pull param.lfs?, I dont have param in my firmware pkg. But according to my PIT, param partition id is 'mmcblk0p12'

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You can use "dd if=/dev/block/mmcblk0p12 of=/sdcard/param.lfs" from terminal emulator or adb shell, or download a 4-file repair firmware and take it from there.
Edit: for SM-A500H it should be param.bin. Not param.lfs

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tys0n said:
You can use "dd if=/dev/block/mmcblk0p12 of=/sdcard/param.lfs" from terminal emulator or adb shell, or download a 4-file repair firmware and take it from there.
Edit: for SM-A500H it should be param.bin. Not param.lfs
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will try it.. thank you very much

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akil777 said:
will try it.. thank you very much
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No problem
I downloaded a 4-file for A500HXXU1CPH8 but there wasn't any param.bin in it. Don't know why it's not included.
You'll probably have to pull it from device. If you zip it and share it, then I can probably help you locate the logo if needed.

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tys0n said:
No problem
I downloaded a 4-file for A500HXXU1CPH8 but there wasn't any param.bin in it. Don't know why it's not included.
You'll probably have to pull it from device. If you zip it and share it, then I can probably help you locate the logo if needed.
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yeah me too.. i had pull param.lfs, now how can I modify it via hex editor?

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akil777 said:
yeah me too.. i had pull param.lfs, now how can I modify it via hex editor?
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It depends a bit on what software is used. I use 010 Editor, but the tools are pretty much the same in other editors as well.
This is the param for SM-A310F so your values will be different from the pictures, but it's easier to understand with a picture.
Load param.bin in editor and make a TEXT search for logo.jpg (yellow)
Result is marked in red. That's not the start position of logo.jpg ,but you will be pretty close.
All .jpg images start with ffd8 in hex and the one nearest will be start position (green)
Write down start position.
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
To find the end of logo.jpg I make a new search from ffd8. This time I search downwards for HEX ffd9 which always mark an end for a .jpg
Now you got start and end positions. Select that whole range in the edit menu and copy/paste it in to a new file in hexeditor.
Save the file as logo.jpg at your desktop and you'll find the bootlogo there
Check properties as resolution, dpi, and byte size and make a new picture with same properties, and a size no greater than original.
Make a new file in hex editor and set it to same bytesize as original logo. Fill it with zeroes, then insert/overwrite the new logo there. Save as logo.jpg. It doesn't matter if there's a bunch of zeroes at the end.
Now you will have a new logo.jpg with same size as original. (double check that!!)
Insert/overwrite the new logo.jpg into param, in the same range as the original is. Save param.bin and make sure its same size as the unmodified param. (double check!!)
You can also extract it from the new param to double check that it's where it should be and can be opened.
Be carefull. This partition is a part of the BL-package and stores image cache for bootloader and other parameters.
Done wrong, in best case you'll have a scrambled picture at boot.
At worst case you'll need a usb-jig to force it to download mode. It happend to me once.
A few other times i've had problems to boot because of what I believe was because of some incompatible exif data in jpg.
I couldn't find anything wrong in the modified param so it must have been it.
Those times it was enough to hold power/vol down, and at the same time insert charger to make it boot to download.
Keep a copy of your original param.bin. Tar it so it can be flashed in odin.
I also have an old tutorial for i8190 with a few pictures using HxD editor here: [HOW-TO]-[param-mod]-[BOOTLOGO]
Pretty much same procedure, but as said, all devices will have different values.
Hit the thanks button if it helped you

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I attempted. But i failed.i got the solution when I used a flashable zip from the galaxy a510 one then edited the updater-binary. Replaced "dev/block/platform/...../byname/param" to "dev/block/platform/s.../byname/param" something like that. I had a backup of param.lfs or .bin whatever by copying mmcblk0p12 to my sdcard.

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akil777 said:
I attempted. But i failed.i got the solution when I used a flashable zip from the galaxy a510 one then edited the updater-binary. Replaced "dev/block/platform/...../byname/param" to "dev/block/platform/s.../byname/param" something like that. I had a backup of param.lfs or .bin whatever by copying mmcblk0p12 to my sdcard.
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Ok good you got it solved.
I havn't looked at that zip, but I will. It sure would be easier with a script