default resoultion for android launcher icon

Android icon guidelines says to use icon of size 36*36pixels for ldpi 开发者_如何学Pythonand 48*48 for mdpi 72*72pixels for hdpi (http://developer.android.com/guide/practices/ui_guidelines/icon_design.html). What is value that i should give as pixels per inch while creating the icon?(Photoshop shows 72 pixels/inch as default value while creating a new icon)

I am quite sure that it does not matter at all. As far as I reckon, the dpi in Photoshop and other (non vectorial) image editing software is used only when you want to print the image.

If you are not convinced, try different settings for your image's dpi and check whether that changes anything.