width and layout

Is there any way I can get around having to add the layout_width and layout_height parameters to my custom views? I know there are a few built in android views that you don't have to supply those attributes for.

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It's not a View's responsibility to decide whether or not it can/should provide these attributes. The parent ViewGroup dictates whether these attributes are mandatory or not. TableRow for instance makes them optional. Other layouts (LinearLayout, FrameLayout, etc.) require these params.

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When would you want to not use the height and width parameters? I'm not sure but I think that would cause them to not even show up on the layout?

Look here for reference http://developer.android.com/guide/topics/ui/declaring-layout.html#layout-params

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From the same Reference Dave has suggested.

All view groups include a width and height (layout_width and layout_height), and each view is required to define them. Many LayoutParams also include optional margins and borders.

So it looks like, you have to.

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