This is a modified mms.apk file that can be used on the optimus s. This will make the sms background black instead. I personally like it this way better than stock.
You Must Be Rooted (use at your own risk)
Directions
Save the mms.apk linked to your desktop
drag it to the root of your sd card
open up root explorer which works like any file explorer
find the sd folder and copy mms.apk
then find system/app in androids file system
hit the mount r/o button
find the original mms.apk and rename it to mms.apk.bak
then paste the file you just copied from your Sd root
Once pasted change the permission on the new mms.apk to match the file you just changed to .bak (just long press the file to get permission option)
Done
Once installed you will notice that it still shows as white even though the check box in settings will say black background is set. Go into the settings in the sms app and unclick black background. Go back into the app and recheck black background. Then go back out again and back in and it should be black. You will have more options for customizing the app also.
File updated to show green notification icon. Picture attached below
You Must Be Rooted (use at your own risk)
Directions
Save the mms.apk linked to your desktop
drag it to the root of your sd card
open up root explorer which works like any file explorer
find the sd folder and copy mms.apk
then find system/app in androids file system
hit the mount r/o button
find the original mms.apk and rename it to mms.apk.bak
then paste the file you just copied from your Sd root
Once pasted change the permission on the new mms.apk to match the file you just changed to .bak (just long press the file to get permission option)
Done
Once installed you will notice that it still shows as white even though the check box in settings will say black background is set. Go into the settings in the sms app and unclick black background. Go back into the app and recheck black background. Then go back out again and back in and it should be black. You will have more options for customizing the app also.
File updated to show green notification icon. Picture attached below
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