Android Question Image quality and type for best results? Icons etc..

[schemer]

In converting a previous vb app I have some small icons etc that seem like they need some polishing up for better quality viewing on the Android. What are the rules or best practices for images when dealing with the app itself like for buttons and icons? I like to use transparent png's so that should be fine but what is the preferred resolution or the minimum that should be used?
I have some icons I can use in the following sizes:

48x48
32x32
16x16

and could make them in the following resolutions:

24bit (true color)
256 colors
16 colors

What is best without overkill?
Thanks,
schemer

 

[Peter Simpson]

Out of all your sizes, I would personally use 64x64 PNG files. I personally use bigger icons, but that's just me...

 

[schemer]

Out of all your sizes, I would personally use 64x64 PNG files. I personally use bigger icons, but that's just me...

Thanks Peter, I just edited my message as I don't have 64x64 icons of the ones already in use from some time ago but if I have to remake them, I will go with 64x64 PNG or larger. What size do you use? I can make them up to 512x512.
schemer

 

[Peter Simpson]

I don't think that it really matter but I personally use 128x128. I just think that it's a size thing in kilobytes rather than a physical size issue. I have images that size but they are optimised quite well.

48x48 is the correct size even though I use larger.

Check this out...
http://developer.android.com/design/style/iconography.html

 

[schemer]

I don't think that it really matter but I personally use 128x128. I just think that it's a size thing in kilobytes rather than a physical size issue. I have images that size but they are optimised quite well.

48x48 is the correct size even though I use larger.

Check this out...
http://developer.android.com/design/style/iconography.html

Thanks for the link and the added info.
schemer