Size of Android UI mockups?

I want to design some mockup interfaces for some Android apps. I would like them to be able to nicely scale up and down depending on the resolution of the mobile device being used.

What would be the best image s开发者_StackOverflowize to design these mockup interface in?

Thanks.

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No resolution is optimal as there are many Android devices with many different resolutions; if you want to create a flexible layout without too much work, you should use Nine-Patch techniques, some info about nine-patch:

1. http://developer.android.com/guide/developing/tools/draw9patch.html
2. http://developer.android.com/reference/android/graphics/NinePatch.html

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I would say 320x480, which are nice numbers to work with, the grid is easily settable (grid of 16 or 32 px) and this is a pretty average display-size for touch screens.

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I would use 480x800 and scale up/down based on the resolution/density of the device.