WARNING: This can cause apps to stop working or inhibit wanted functionality. (Autostarts is free/open-source software, also available from f-droid.) For both solutions, you’ll need root access. Or you can use an app like Autostarts to edit specifically which Intents will be sent to which apps. By using an app like Permissions Denied you can alter which permissions apps can request, which in turn limits which events they can receive. Editing Autostarts and IntentsĪs mentioned above, some applications may start when they receive Intents (system events). Now, whenever you leave the app, Llama will kill it. Select Kill Application (root privileges), then select your app again. Add the condition called Active App, and choose the status App stopped or in background. Instructions for Llama:Ĭreate a new Event. An app like Tasker or Llama can be used to end activities when you switch apps, for example, ensuring they don’t stay around in the background. In essence, they’re just making manual task management easier for you. Nothing good can come of it.Ī possible exception is automatic tasks that execute only when you, the user, perform a specific action. Similarly, apps that receive system events known as Intents (such as network coverage and connectivity changes) will be killed every time they start up to receive an event. Services that run automatically and are restarted by the system will be killed over and over, wasting your battery. Most of the time this makes things worse, because apps often consume more resources when they’re starting up compared to when they’re sitting idle. WARNING: Do not use automatic task killers! Automatic task killers run in the background (exactly what you don’t want) and kill apps whenever they start. For services, look at Settings -> Applications -> Services. In older versions of Android there may be a built-in Task Manager added by the manufacturer to accomplish the same thing, or you can download a task manager app to do so. Alternatively you can hit the Recent Applications button and swipe them off the screen to close them. If you are running Ice Cream Sandwich or Jelly Bean, you can go into Settings, hit Applications, and manually shut down the app by tabbing over to the running apps. Manually Killing Appsįirst, note that many apps will close completely if you Back out of them rather than using the Home button. If you contact the developer with your problem, they can fix the app and you can go on using it normally. Everything that does not involve a fix by the developer is just a hack that will result in other negative side effects. We need to kill them all with fire, and not by ignoring them. Some of the greatest daemons that come with Android are services that run in background for no reason or when a simple interval check with Android’s AlarmManager would be sufficient. However, if you want to be able to use that app then this is not an option: keep reading. Problem solved! You can remove system apps if you have root, most easily with Titanium Backup, but be careful to remove only carrier bloatware and not critical system apps. When an app does something you don’t like, whether running in the background on startup or something else, your first option is to uninstall it. If you’re sure you want to make this app stop at all costs, you can try these methods. If you’ve got a rogue service you may want to try one of the solutions below. However, poorly designed services may run more often or perform syncing operations that you don’t want, affecting battery life and your data usage. Well-designed services spend most of their time sleeping, waking up for the occasional check (new social media notifications, for example). If the app in background is running a service, that may be a different story. If battery life or CPU performance is your concern, you don’t need to worry about these apps! You don’t need to worry about memory, either Android will automatically kill the app and free the memory if the system is running low. Activities are usually not able to run computations in the background, so no CPU or battery is used for them. Activities consume some memory, so that you can go back to the app and pick up where you left off. Most apps (e.g., ones you launch manually) have their current Activity put into the background when you switch to another app or the homescreen. See also: Do I really need to install a task manager? You may have some misconceptions about how Android works and what’s really happening when a service is running or an app is in the background. SuperUser contributor Matthew Read offers a detailed breakdown of why this may not matter as much as Scott believes, and how Android differs fundamentally from other operating systems in regard to startup apps and background processes: First Things First
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