32 Bit PNG's won't save as png?
Just for some background knowledge. I am absolutely terrible with graphics, but I attempt anyway. I am trying to create a dead simple graphic for my Android APplication while trying to follow the guidlines set by Google. (http://developer.android.com/guide/practices/ui_guidelines/icon_design_action_bar.html)
Action Bar icons should be 32-bit PNGs with an alpha channel for transparency
I tried to set that type of project up in photoshop, but now it won't let me save as a PNG.
Just as an addition to this, they state that ActionBar icons should be 32x32dp. How can I make an icon using those guidelines?
32bit refers to 8 bits per channel for red, green, blue and alpha. In Photoshop, that's called 8 bit mode. 32 bit mode in Photoshop refers to 32 bits per channel, meaning 128 bits in total (32each for red, green, blue and alpha).
32Ã—32dp (display points) works out to be 32Ã—32 pixels for mdpi, 48Ã—48 for hdpi, and 64Ã—64 pixels for xhdpi. Those are the pixel sizes you'll need for a the icon you're after when building a modern Android app.
So, just to clarify, you're after 3 final icon sizes.
- 32Ã—32 pixels at 8 bit per channel for medium DPI.
- 48Ã—48 pixels at 8 bit per channel for high DPI.
- 64Ã—64 pixels at 8 bit per channel for extra high DPI.
Once you've created your Photoshop document and icon, you can use Save For Web to save the image.