You launch an instant messenger or music player, switch to another task, and after a few minutes you return and see that the application has restarted from the very beginning. This is one of the most common and annoying problems with modern smartphones. Users often wonder why their devices behave so aggressively towards running apps, although multitasking used to work more stable.
The main reason lies in the evolution of the operating system itself Android and changes in manufacturers' approaches to resource management. Every year, optimization algorithms become stricter, trying to extend the battery life of the device at the cost of background activity. Understanding the working mechanisms of task manager and the energy saving system will help you regain control of your gadget.
In this article we will analyze in detail the technical aspects of forcing processes to stop, the influence of hardware limitations and software settings. You'll learn how to distinguish normal system behavior from a crash, and receive specific instructions on how to configure your smartphone to keep the apps you need in memory.
Aggressive battery optimization and power saving modes
Modern skins from manufacturers, such as MIUI, OneUI or ColorOS, implement their own add-ons over standard power management. Their main purpose is to minimize battery drain when the screen is turned off. To do this, the system automatically puts rarely used or resource-intensive applications into a "sleep" state or completely terminates their processes.
When you activate the power saving mode, the operating system begins to enforce strict limits on background activity. This applies not only to access to the Internet, but also to the ability to execute code in memory. Background services Forcibly stop if the system believes that they are consuming too much power without explicit user interaction.
⚠️ Attention: Power saving settings may vary depending on the Android version and manufacturer. Always check the latest menu items in the Battery section of your specific device, as interfaces are updated regularly.
Particular attention should be paid to the adaptive battery, which analyzes your usage habits. If you rarely open a particular application at a particular time of day, the system may decide that it is not worth running in the background and close it to save resources. This is a smart feature, but it often works too proactively.
Turn off Ultra-Saving or Super Power-Saving mode if it is critical for you to keep applications running in the background continuously, for example, for navigation or audio recording.
Lack of RAM and task manager operation
RAM (RAM) is the scarcest resource in the mobile ecosystem. Unlike computers, smartphones have strict limits on the amount of available memory, and when this limit is reached, the system is forced to take drastic action. The Low Memory Killer (LMK) mechanism automatically selects processes to terminate to free up space for the active application.
Priority is given to the window that is on the screen right now. Anything that is rolled up is at risk. If you launch a heavy game or camera, the system will instantly unload instant messengers, browsers and other background utilities from memory to prevent the performance of the main process from deteriorating.
The amount of available memory directly affects the depth of application caching. On devices with 4 GB RAM or less, background processes do not last very long. Even on flagships with 12 GB and more aggressive firmware settings can artificially limit the available memory, creating the illusion of a lack of resources.
- 📉 High memory load leads to instant unloading of old processes.
- 🔄 Heavy applications take up more space in the cache and are closed first when there is a lack of resources.
- ⚙️ System services always have the highest priority over user apps.
Restrictions on background activity in application settings
Starting with version Android 8.0 Oreo, Google has introduced strict restrictions on the background execution of services. Now applications can't just run in the background indefinitely. They must use special mechanisms, such as JobScheduler or WorkManagerto schedule their tasks. If the developer has not adapted the application to new standards, the system will close it.
The user can also manually configure restrictions for each specific application. In the settings menu, you often see the option “Limit background activity” or “Battery saver for an application”. If you select a hard restriction here, the system will kill the process immediately after you minimize the window.
Critical apps such as email clients or delivery trackers must be explicitly allowed to run in the background. This is done through the menu Settings → Applications → [Selected application] → Battery. Here you need to select the “No restrictions” or “No restrictions” option to disable system sleep timers for this app.
Path to allow background work:
Settings → Applications → Special access → Battery optimization → All applications → Select the one you need → Do not optimize
☑️ Checking application settings
The influence of third-party cleaners and antiviruses
Paradoxically, but often the reason why applications are closed is the apps themselves for “optimizing” the system. Third-party memory cleaners, antiviruses and speed boosters often work more aggressively than the operating system itself. Their algorithms are configured to free up the maximum volume RAMwhich leads to a constant reboot of the services you need.
Such utilities can perceive the background work of the messenger as a performance threat and forcefully terminate its process. As a result, you lose notifications and session history. Modern versions Android already have built-in effective memory management mechanisms, making third-party “accelerators” not only useless, but also harmful.
If you have such software installed, try temporarily disabling its automatic cleaning function or adding important applications to the white list (exceptions). In most cases, removing such software has a positive effect on the stability of background apps and even increases battery life.
⚠️ Attention: Avoid using the “Clear all” or “Speed up phone” functions in third-party applications if you want to save your session in an important app. This action is guaranteed to close all background processes.
Developer errors and unadapted software
The problem does not always lie in the system or user settings. Often the blame lies with the application developers themselves. If the code is written incorrectly, the application may consume an abnormally large amount of resources or attempt to perform prohibited actions in the background, which provokes the system to forcefully stop it through the mechanism. Outdated versions of apps may not take into account new security and power management requirements introduced in recent versions. For example, attempting to access a geolocation or microphone in the background without the appropriate permissions will result in the process being immediately closed by the security system. Force Stop.
Outdated versions of apps may not take into account new security and power management requirements introduced in recent versions Android. For example, attempting to access a geolocation or microphone in the background without the appropriate permissions will result in the process being immediately closed by the security system.
It is also worth considering conflicts between different versions of libraries. If an app uses outdated components, it may be unstable on newer smartphones. Regular software updates through the official store Google Play or Galaxy Store often solves problems with unexpected crashes.
How to check the error log?
For advanced users: connect the smartphone to a PC with ADB installed and enter the command `adb logcat`. In the data stream, look for the `ActivityManager` or `Am` tags, which report the reasons for killing the process (Kill Reason).
Comparison of policies from different manufacturers
Different brands implement background process management in different ways. Chinese manufacturers are historically known for their extremely aggressive settings to save energy, while the stock one on smartphones behaves more user friendly. Below is a table showing the behavior of popular shells. Understanding the specifics of your firmware will help you choose the right configuration strategy. Android on smartphones Google Pixel behaves more loyal to the user.
Below is a table showing the behavior of popular shells. Understanding the specifics of your firmware will help you choose the right configuration strategy.
| Manufacturer / Shell | Aggressiveness | Control features | Recommendation |
|---|---|---|---|
| Xiaomi (MIUI / HyperOS) | High | Tight control of autorun | Enable "Autorun" and remove battery restrictions |
| Samsung (One UI) | Medium | Smart sleep monitoring | Add applications to “Non-sleep” |
| Huawei (EMUI) | Very high | Battery protection is a priority | Use manual launch manager |
| Google (Pixel UI) | Low | Adaptive battery | Disable adaptation for important applications |
Device owners Xiaomi i Huawei often have to perform additional steps, such as pinning the application in memory through the multitasking menu (swipe down or click on the lock). Without this action, the system may close the app even if there is free memory.
On smartphones of Chinese brands, it is imperative to allow auto-start for each important application manually in a special security menu, otherwise the system will block its operation after a reboot.
Practical steps to prevent applications from closing
To ensure stable operation of the necessary apps, you need to take a comprehensive approach to setting up the device. Start by disabling global saving modes, which affect all applications at once. Then proceed to individually configure each important service.
Use the pinning of applications function in the recent tasks menu. On most devices, this is done by clicking on the application icon in the list of running processes or by swiping down. This signals to the system that this process is a priority and should not be closed when clearing memory.
Also check background permissions. Make sure the app has access to data in the background. Sometimes resetting an app or reinstalling it can help update power profiles and remove erroneous restrictions previously imposed by the system.
- 🔒 Pin the app to the multitasking menu (lock icon).
- 🔋 Set the battery mode to "Unlimited" for a specific app.
- 🚀 Allow autorun in system security settings.
Why do applications close immediately after the screen is locked?
This behavior is usually caused by power saving settings that are activated when the display is turned off. The system goes into deep sleep mode, disabling network interfaces and background processes to save battery. It is necessary to disable the “Suspend activity in sleep mode” option in the battery settings.
Does the amount of internal memory affect the operation of applications in the background?
Indirectly. If the internal memory (ROM) is full, the system does not have enough space for the swap file and temporary caches. This can lead to general instability and more frequent unloading of applications from RAM.
Is it possible to completely disable the killing of background processes?
It is impossible to completely disable this mechanism without root access, since it is the core of Android stability. However, you can significantly mitigate its operation by setting exceptions for specific applications and disabling aggressive power saving modes.
Why do apps close more often after updating Android?
System updates often bring new security and power management policies. What worked in the old version may be blocked in the new one. Check your permissions and battery settings after each major firmware update.