Android Question Round corners

[wonder]

Hey guys,

In the designer we're able the change the corner radius of a panel (in degrees).
It's a pretty cool feat, when set to 180 I'm getting some sweet perfectly circular panels.

My question is, how do we change this value by code?


EDIT: My (little big) mistake, the corner radius is in dip, not degrees.

If you have a square view and set the corner radius to the half of the width you get a circle.

 

[derez]

You can initialize a colordrawable and set the radius there (2%x in the code below, can be by dip etc.).

Dim dr As ColorDrawable
dr.Initialize(Colors.rgb(120,120,255), 2%x)
calc.Background = dr

You can get the existing drawable by = [name].Background

 

[wonder]

Hello Derez,

Thank you for the quick answer!

I'm not quite following.
Why would a value that should be in degrees (0-360) be in screen units?
Also I need it specifically for Panels...

 

[wonder]

...or maybe I've always been wrong and the "degrees" part is just my imagination.

 

[derez]

The radius of the corner is a distance , not angle.
It works for all views that have the .Background method.

 

[klaus]

In the designer we're able the change the corner radius of a panel (in degrees).

Are you sure ?
A radius cannot be in degrees, only in pixels.
In the Designer the value you enter is considered as a dip value.
In the code you need to use dip values to set it.
If you have a squre view and set the corner radius to the half of the width you get a circle !

 

[wonder]

The radius of the corner is a distance , not angle.
It works for all views that have the .Background method.

I see your point! Thanks for the help!
I guess I always associate round things with angles.

So the final answer is that the roundness can be set like this:

Panel1.Color = (Colors.ARGB(255, 255, 255), 2%x)

Are you sure ?
A radius cannot be in degrees, only in pixels.
In the Designer the value you enter is considered as a dip value.
In the code you need to use dip values to set it.
If you have a squre view and set the corner radius to the half of the width you get a circle !

Hi Klaus,

You guys are totally right!! Indeed a radius is always distance, not an angle!! Also thanks for the tip on creating circles! I will update my code ASAP!!

 

[derez]

So the final answer is that the roundness can be set like this:

No ! , don't mix the color property with Background property which deals with drawable. The color drawable defines both color and radius of the corner.

 

[wonder]

I understand Derez.

So how do I implement this code into an existing Panel (myPanel for example)?

Dim dr As ColorDrawable
dr.Initialize(Colors.rgb(120,120,255), 2%x)
calc.Background = dr

Like this?

myPanel.Background = dr

 

[derez]

Yes. Once you perform the Background method, the panel forgets about the previous drawable it had.

 

[wonder]

Thank you very much Derez!!

This will sure improve my projects as I had some ideas I didn't know how to implement!!