Numerous developers and huge companies such as Google, Facebook, and Twitter have already implemented this feature in their applications. Users can change the entire look and feel of their application with a click of a button. The material theme is the latest system theme and it’s only available on Android 5.0 (API 21) and above.In the recent past, there has been a lot of excitement regarding dark mode. Since Android 4.0 is still a practical minimum target for most apps (as of this writing), it’s a safe pick if you want a consistent look on all are three themes included with the Holo themes: light, dark and light with dark action bars. The Holo theme was introduced with Android 3.0 (Honeycomb) and required on all devices running Android 4.0 and higher. Here are some examples of the available themes.

But as Android continues to evolve, more themes are developed and, depending on the version of the device, it may not support the newer material theme. Each device has theme information already installed and your app is basically taking advantage of it. The device default is a good choice if you want to target older devices while not holding back the cutting edge styles. With this theme you are mainly controlling light versus dark. Not setting the theme is the same as setting it to device default themes will vary based on the Android version of the device. Dark themes do not use the word ‘dark’ since it’s the default. You can switch your app to use the light theme by setting the Theme in the AndroidManifest.xml (located in the Droid project under the Properties node). Unless you create your own custom theme, you must choose a side: light or dark? When you create a new Xamarin Android app it will have the device default dark theme. Unlike Windows Phone where you can let the user choose a light or dark theme for your app, the Android theme is typically set once-and-for-all by the developer. Using system themes help conform app styles and reduce the variance that users encounter.

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