I @sue, i’m revisiting this issue. I think a lot has changed since dropsource created those android elements.
Yes you were right that some years back android preferred the more boxy no border style.
But for some time now android material design has changed a lot and its hard to come across any app (even from Google themselves) that doesn’t use borders or rounded corners.
In fact according to the official Android (material) guideline
Material surfaces have a rectangular shape by default, with 4dp rounded corners.
If you take a look at all the components, example for buttons in the Android guideline, you will also notice that by default buttons have rounded corners (4dp) and recommends using buttons with outline (borders) for some specific cases
Text button (low emphasis)
Text buttons are typically used for less important actions.
Outlined Button (medium emphasis)
Outlined buttons are used for more emphasis than text buttons due to the stroke.
Contained button (high emphasis)
Contained buttons have more emphasis, as they use use a color fill and shadow.
Toggle buttons group a set of actions using layout and spacing. They’re used less often than other button types.
Here is another example of the use of rounded corners in buttons (especially look at the ADD ENTRY button ) and views in the Android guideline
And for borders (or outlines), in fact there is a whole dedicated section on outline buttons
Finally in general i believe Google has embraced this whole concept of roundedness and has implemented it across their products.
Take a look at the current google search page on chrome.
I hope i’ve made a strong case for the need to update the Android elements to reflect the current official guidelines.
So base on your own statement above i think its fair to expect Dropsource update the Android elements to “reflect the design guideline of the platform”.
To be specific i’m making a feature request for border properties and border radius for buttons and views according to the Android Material Design Guideline.