![]() You can detect any wake locks being held by applications on your device through adb: adb shell dumpsys power ![]() Since only PARTIAL_WAKE_LOCKs persist when the user presses the power key the remainder of this blog will be concerned exclusively with those, where the CPU continues running but the screen and hardware keyboard backlight is allowed to turn off.Īndroid documentation is available for the wake lock definition as well as methods to acquire and release wake locks.Īny application requiring a wake lock must request the android permission: A wake lock can control the status of the CPU, Screen and hardware Keyboard backlight but all but one type of wake lock can be cancelled by the end user simply by pressing the power key. Wake locks are an Android concept designed to allow an application to indicate that it wants to have the device stay on, for example the YouTube application would take a FULL_WAKE_LOCK to prevent the screen turning off whilst the user is watching a video. The application needs to do work continually and it is not acceptable for the Android OS to kill the application’s background services.īefore diving into the detail, it is necessary to understand the concepts around Android power management: Wake Locks.Often Firebase Cloud Messaging (FCM) is not a suitable option for customers because the device is behind a firewall or does not have GMS services available. The application should be available to respond to network requests, for example a push message.There are two fundamental reasons people might not want the device to enter a power saving mode: The goal of this blog is to explain your options as an application developer to give you the most control over your device’s power management and what you can do to ensure your application is always available to your users. It is assumed the reader is familiar with doze mode and the other changes made in Android Oreo and Pie related to background services, at least at a high level.įrom a consumer point of view, getting maximum battery life out of a device is frequently an ever-present consideration, so much so that a slew of snake oil “task manager” and “task killer” applications formerly gained popularity to prevent background apps but in recent Android releases Google has taken a more aggressive approach to what apps can do in the background.Įnterprise applications are written primarily to enhance user efficiency battery consumption will always be a consideration but may be secondary or tertiary to application responsiveness or performance. ![]() Since the introduction of doze mode in Android Marshmallow we have seen a number of enterprise use cases where customers want to ensure their application continues to run even though the device wants to enter a power saving mode. Updated January 2020 to include detail about Android Pie. ![]()
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