In a recent update, Google has unveiled an intriguing feature set to debut with Android 17, known as “Handoff.” This innovative addition aims to enhance user experience by allowing seamless transitions between devices.
Handoff operates quietly in the background, providing both a user-facing feature and an API for developers. The functionality enables users to initiate an app activity on one Android device and effortlessly continue it on another. Google plans to leverage the launcher and taskbar to display available activities from nearby devices, creating a fluid ecosystem for users.
One of the standout aspects of Handoff is its ability to launch the same native Android app, provided it is installed on the receiving device. This ensures that users can maintain their workflow without interruption.
In this app-to-app flow, the user is deep-linked to the designated activity.
Additionally, Android 17 will incorporate an “app-to-web Handoff” option, serving as a fallback for users who may not have the app installed on their second device.
For developers, the implementation of Handoff is designed to be straightforward, operating on a per-activity basis. To enable this feature, developers will need to invoke the setHandoffEnabled() method for the specific activity. It’s also essential to pass any necessary data to ensure that the activity can be accurately restored on the receiving device.
To enable Handoff, call the setHandoffEnabled() method for the activity. Additional data may need to be passed along with the handoff so the recreated activity on the receiving device can restore appropriate state. Implement the onHandoffActivityRequested() callback to return a HandoffActivityData object which contains details that specify how Handoff should handle and recreate the activity on the receiving device.
As of now, Android 17 Beta 1 has yet to showcase this feature in action, and further developer documentation remains sparse. Notably, the taskbar functionality is currently limited to foldables, tablets, and larger screen Android devices. This raises intriguing possibilities for how Handoff might be utilized in a desktop Android environment, such as beginning an email on a smartphone and finishing it on a laptop.
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