Adobe managed to do this with the Source Pro family of fonts, Apple created San Francisco, and Google came up with Google Sans and Roboto.

Good operating system GUIs, especially those that power smartphones, require fonts that resize fluidly and are readable and appealing, no matter whether used in tiny battery meters or in blown-up homescreen widgets and to make a typeface that’s recognizable on every such scale on a digital screen is no more a practical impossibility. Sadly though, even the best typefaces ever created, including Helvetica (arguably the most popular no-frills typeface ever created), would turn to mush if they were scanned and used on computers as-is, the way they were created for print. It’s easy to overlook the importance of typefaces in software design, especially when it comes to designing graphical user interfaces. When you make a purchase using links on our site, we may earn an affiliate commission.

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With the release of Android Oreo you can use the support library to reach this goal.

For example: the buttonStyle doesn't contain android: prefix, but textViewStyle must contain it. If you're using AppCompat themes, remember to remove android: prefix. For custom fonts (loaded from assets for example) this method will not work. It will work only with built-in fonts like Roboto, but that was the question. At the end, apply the style as the theme of the application. Global Roboto light for TextView and Button classes: select the style you want from list themes.xml, then create your custom style based on the original one.

What is android studio default font