Google Duo 是一款簡單好用的高畫質視訊通話應用程式，適合所有人使用。在 COVID-19 疫情期間，越來越多人在家，Duo 團隊發現，透過應用程式與親朋好友、學校和公司保持聯繫的使用者數量大幅增加。該團隊致力在所有平台和介面上打造優質體驗，考量到市面上日益普及的平板電腦和折疊式裝置體驗，這些裝置的普及率在 Duo 使用者中廣受使用。
接著，該團隊還思考過各種螢幕尺寸的 Duo 使用者互動情形。雖然在手機上使用滑動接聽來電的效果非常好，但開發團隊發現，這項做法在平板電腦或折疊式裝置上無法正常運作。部分 Duo 使用者不小心接聽來電，無法快速掛斷。該團隊在平板電腦上導入按鈕，並在折疊式裝置上推出雙滑板，讓大螢幕體驗發揮最佳效果。在改善 UI 的過程中，該團隊密切監控行為變化，也發現這些裝置在無意間發生短暫來電減少的情形，以及增加這些裝置的通話時間。Duo 的使用者介面經過調整後，Duo 使用者可享有更順暢的通話體驗。
[null,null,["上次更新時間：2021-05-18 (世界標準時間)。"],[],[],null,["# Google Duo sees increased engagement and improved ratings by optimizing for larger screens\n\n[Google Duo](https://play.google.com/store/apps/details?id=com.google.android.apps.tachyon) is a simple, high quality video calling app for everyone. With the increase of people being at home during the Covid-19 pandemic, the Duo team saw a significant increase in people using the app to stay connected with friends \\& family, school and work. The team strives to build great experiences across all platforms and surfaces, and saw an opportunity to improve the experience for tablets and foldable devices given the huge growth of these devices in the market, and the prevalence of them amongst Duo users. \n\n*Google Duo on the Samsung Galaxy Z Fold2*\n\nWhat they did\n-------------\n\nThe team started by thinking about the unique experience they can provide users with foldables. They wanted to design for each [posture](https://developer.android.com/guide/topics/ui/foldables#postures) to make sure the app experience is optimal across them. *\"All of our support is within the same application, we configure for different devices based on different widths and heights.\" - Oren Freiberg, Software Engineer*\n\nAs one of the first optimizations, they removed all small buttons from the middle of the screen to avoid users having to press buttons within the crease, using the [WindowManager](https://developer.android.com/reference/androidx/window/WindowManager) and [FoldingFeature](https://developer.android.com/reference/androidx/window/FoldingFeature) Jetpack libraries to redesign the UI and create a tabletop experience for calls. This enabled callers to be shown on the top screen of the foldable, while the bottom screen displayed all of the controls and menu items, which is a **huge improvement for the user experience.** \n\nAfter this, the team thought about user interactions with Duo across all screen sizes. While swiping to answer a call works really well on a phone, the development team learned through testing that this didn't work as well on a tablet or foldable. Some Duo users were unintentionally answering phone calls and having to hang up quickly. The team optimized the larger screen experience by implementing buttons on tablets, and dual sliding pucks on foldables.The team was closely monitoring behavior changes as part of this UI improvement, and saw a **decrease in unintentional brief calls on these devices, as well as an increase in call time** on these devices. This UI tweak enabled Duo's users to have a more seamless calling experience. \n\nResults\n-------\n\nThe investment in optimizing for tablets and foldables led to a better experience for users on larger screens, which led to an **improvement in the average app ratings for optimized tablets by half a point.** App engagement improved as well as call time on tablets and foldables increased after these changes. Upgrading the experience and look \\& feel was critical to the business as communication apps are taking off on larger screens, and it's important to optimize these experiences to stay competitive. The Duo team plans on continuing to optimize the experience across all form factors.\n\nGet Started\n-----------\n\nLearn more about how you can get started with [optimizing your app for larger screens](https://developer.android.com/guide/topics/ui/nff-overview)."]]
