On March 21st, Google unveiled the developer preview for the latest version of the largest OS in the world: Android O. For consumers, it means improved UI, design, battery life, & more. For app developers, it has far deeper implications. With release anticipated in Q3 2017, here is our rundown of the top takeaways about Android O for Android developers:
The main focus of Android O appears to be to continue Android Nougat’s initiative to reduce battery life. The OS will limit and manage what launched apps can do in the background when multiple apps are open. For example, if a user has a geolocation app open in the background while using another app, location updates will happen less frequently for the background app.
In technical terms, background execution & location limits have been reigned in, allowing the OS to better manage background activity. Background apps are defined by Google as apps showing no visible activity, no foreground service & not connected to a foreground app through its services. Location changes affect the following APIs:
- Fused Location Provider (FLP): The local system service computes a new location for background apps only a few times each hour, according to the interval defined in the Android O behavior change. Foreground apps will not experience location sampling rates in relation to Android 7.1.1 (API level 25).
- Geofencing: Background apps can receive geofencing transition events more frequently than from FLP.
- GNSS Measurements: Callbacks registered to receive outputs from GnssMeasurement and GnssNavigationMessage will stop executing for background apps.
- Location Manager: Location updates will be provided to background apps only a few times per hour according to the interval defined in the Android O behavior change.
Android OS’s have always thrived in the notification department. Android O allows developers to group notifications into channels. Developers must select a channel for each distinct type of notification they send with the goal of making things easier and more customizable for the user. For example, a user can turn off the “Sports” notification channel from the New York Times app if they are already getting sports notifications from the ESPN app.
Developers can also allow user behavior to dictate notification channels. For example, the developer of a messaging app can create separate notification channels for each of a user’s messaging threads.
Wi-Fi Aware, or Neighbor Awareness Network (NAN), allows devices to discover and connect directly with each other without any other connectivity between them, like Wi-Fi Access Point or Cellular. Two phones can connect with each other with NAN and share data at high speeds without any additional apps or configuration, opening up tons of possibilities for developers.
Learn more about Wi-Fi Aware:
HI-FI BLUETOOTH AUDIO
Android O supports Hi-Fi Bluetooth audio. While the quality of the audio still depends on the speaker or headphone through which one listens, this is a major improvement for music lovers.
Android O will introduce adaptive launcher icons. Adaptive icons support visual effects and can display a variety of shapes across different device models. Adaptive icons are a major tool for developers to guide the user’s eye and enhance UX. Check out Android’s developer site to learn more.
The O Developer preview will run from March 21st to the final Android O public release anticipated in Q3 2017. Android will provide incremental updates in mid-May, June, & July. Until Q3 2017, the onus is on Android developers to prepare their future and existing apps for the latest operating system.