When you pick up a modern smartphone, you interact with a visual interface: bright icons, widgets and smooth animation. However, behind this beautiful façade lies a sophisticated software platform that makes every touch you make possible. This platform is called operating system (OS), and in most gadgets on the market it is Android. Understanding what is hidden “under the hood” helps not only to use the device more competently, but also to solve emerging problems more effectively.
Many users perceive the phone as a single whole, without thinking about the fact that the hardware (processor, screen, camera) itself is dead without control software. It operating system acts as an intermediary between physical components and the applications that you use every day. It distributes resources, monitors security, and ensures communication between different apps. If you have ever noticed that the phone starts to “slow down” when opening many tabs, know that this is the work of the OS in distributing RAM.
In this article we will analyze the architecture in detail Android, find out why there are different versions and shell, and also answer the main questions about how this system controls your digital world. You will learn how the system kernel differs from the user interface and why manufacturers change the names of their versions so often.
Basic architecture: kernel, libraries and runtime
To understand what the Android OS is on a phone, you need to look into its structure. The system is built on a modular principle, reminiscent of a layer cake. The lowest and most important layer is Linux kernel. It is this that directly communicates with the hardware: processor, display, communication modules and camera. The kernel takes care of power management and device drivers, ensuring stable operation of all components.
Above the kernel are native libraries and the runtime environment Android Runtime (ART). Previously, the Dalvik virtual machine was used, but modern versions have switched to a faster ART, which compiles application code into machine code at the time of installation. This allows applications to start up instantly and run smoothly, using processor resources as efficiently as possible. Libraries contain a set of ready-made functions for working with graphics, databases and web protocols.
⚠️ Attention: Interfering with the operation of system libraries or the kernel without the appropriate knowledge (rooting) can lead to complete inoperability of the device and loss of warranty.
Top level - this is the application framework and the user apps themselves. Here are System servicessuch as window manager, telephony or notification management. When you open the browser, it is the framework that allocates space on the screen for it and provides audio output through the speaker. This entire complex chain of processes occurs in a fraction of a second, creating the illusion of ease of use.
Technical detail
Why is Android written in Java and C++?: The system kernel and drivers are written in C/C++ for maximum speed with the hardware. Applications and the upper layers of the framework use Java and Kotlin, which allows developers to create cross-platform code that is easier to write and maintain.
Versions, code names and system evolution
One of the most confusing things for beginners is the abundance of versions and names. Google releases major updates annually, assigning them numbers and, for a long time, names after sweets. Understanding the numbering helps determine what functions are available on your device and how protected it is from modern threats.
Each new version brings not only a new design, but also changes in security algorithms and memory handling. For example, the transition to Android 10 marked the abandonment of sweet names in the public space, although within the company code names (Quince Tart, Red Velvet Cake) were retained. It is more important for the user to know the version number, since compatibility with new security algorithms depends on it, since compatibility with new security algorithms depends on it. The table below compares the key characteristics of different generations of the system so that you can navigate the evolution of the platform: data-i="65">Android version applications from the store Google Play.
The table below compares the key characteristics of different generations of the system so that you can navigate the evolution of the platform:
| Android version | Codename (internal) | Release year | Key features |
|---|---|---|---|
| 9.0 | Pie | 2018 | Improved battery management, gesture navigation |
| 10 | Quince Tart | 2019 | Dark theme, privacy control |
| 11 | Red Velvet Cake | 2020 | Message bubbles, one-time permissions |
| 12 | Snow Cone | 2021 | You material design, lock screen widget |
| 13 | Tiramisu | 2022 | Language selection wizard for applications, clipboard |
It is important to note that version support is limited. Older versions, such as Android 6 or 7no longer receive security updates, which makes them vulnerable. Therefore, when purchasing a new device, always check to what version OS it is planned to be updated by the manufacturer.
Custom shells: why is Android different for everyone
You can often hear the question: “Why does the interface look different on Samsung than on Xiaomi or Pixel?” The answer lies in custom shells. Clean Android (or Stock Android) is the basic version of the system that Google is developing. However, smartphone manufacturers rarely leave it in its original form, adding their own layer of customization.
These skins, such as One UI from Samsung, MIUI from Xiaomi or ColorOS from OPPO, change the visual style, add unique widgets, change the settings menu and implement own system applications. For the user, this means two ways: either richer functionality out of the box (screen recording, cloning applications, fine-tuning the interface), or the risk of getting a bloated system with unnecessary processes.
⚠️ Attention: Heavy custom shells can consume more RAM and battery power compared to pure Android. If speed is important to you, choose smartphones from the Android One or Google Pixel series.
On the other hand, it is thanks to the shells that we see unique features, for example, one-handed mode or advanced camera settings. Interface becomes a tool for brand differentiation. When choosing a phone, you should pay attention not only to the hardware, but also to how much you like the specific implementation UI (User Interface).
Before buying a smartphone, look at reviews of the interface (shell) of the model, and not just the camera. It is very difficult to get used to the inconvenient settings menu, and you cannot change it without flashing the firmware.
Resource management: memory and multitasking
The Android OS is famous for its multitasking, but how exactly does it cope with dozens of running applications? Unlike older systems, Android doesn't close apps completely when you minimize them. They go into a waiting state in RAM (RAM), so that when reopened they start instantly.
However, the memory is not rubber. When the free space runs out, the Low Memory Killermechanism comes into action. It forcibly closes background processes that have not been used for a long time, freeing up resources for the active task. This is why on phones with a small amount of RAM (for example, 2-3 GB), you can see constant reloading of browser tabs or games.
In addition, the system actively manages Energy saving. Modern versions of Android strictly control the background activity of applications, limiting their access to GPS, microphone and network if you are not using them right now. This helps extend battery life, but can sometimes lead to delayed notifications from instant messengers.
☑️ Optimizing memory
Security and Google ecosystem
Security is built into Android based on the “sandbox” principle (sandboxing). Each application runs in an isolated space and does not have access to other apps' data or system files without the user's explicit permission. This is a fundamental principle that protects your personal data from leaks and malicious code.
The central element of the ecosystem is Google Play Services (GMS). They are responsible not only for the operation of the application store, but also for synchronizing contacts, maps, push notifications and geolocation. Without these services, many popular applications (maps, taxis, banking) simply will not function correctly, even if the OS itself is installed.
Regular security patches are released monthly. They close vulnerabilities found by researchers. However, the speed of receiving them depends on the phone manufacturer and telecom operator. Smartphone owners Google Pixel receive updates first, while users of other brands can wait several months for a patch.
Regular system updates mean not only new features, but also critical security patches. It is not recommended to disable automatic updates.
Common myths about the operating system
There are many legends around Android, which often confuse inexperienced users. Debunking these myths helps to better understand the real state of affairs and not make mistakes in servicing the device.
- 📱 Myth: "You need to constantly clean the RAM with special applications." Reality: Forcibly closing applications forces the system to spend more energy on restarting them. Android itself manages memory perfectly.
- 🔋 Myth: "Android drains the battery quickly." Reality: Modern versions of the system are very energy efficient. Charging problems are more often caused by “crooked” applications or a worn-out battery, and not by the OS itself.
- 🦠 Myth: "On Android you definitely need an antivirus." Reality: When installing applications only from the official store Google Play The risk of infection is minimal thanks to the built-in Play Protect scanner.
Understanding how it works operating systemeliminates the need to install dubious "accelerator" utilities, which often are a source of advertising and data collection. Trust the built-in device management tools.
⚠️ Attention: Installing applications to “speed up” or “cool” the processor from untrusted sources may lead to the installation of adware or miner viruses.
Conclusion
The Android OS is a complex, multifaceted organism that processes thousands of your commands every day. From the Linux kernel to the user interface, each layer performs a critical function. Understanding the basics of how this system works allows you not only to use your phone, but also to make it work to the limit, avoiding common mistakes.
Technology does not stand still: artificial intelligence is increasingly integrated into the system, predicting your actions and optimizing battery performance. Stay tuned for updates, explore new features and don’t be afraid to customize the interface for yourself, because Android is designed to be a flexible tool in your hands.
What is Project Treble?
This is a major change in the Android architecture introduced in version 8.0. It separated the vendor code (drivers) and the OS framework. This has allowed manufacturers to release Android updates to older devices faster and easier, since they don't have to rewrite all the code for the new Android.
FAQ: Frequently Asked Questions
How can I find out the exact version of Android on my phone?
Go to Settingsscroll down to point About phone (or System). The Android version and build number will be indicated there. Often you need to click several times on the "Android Version" item to see the system Easter egg.
Is it possible to install a newer version of Android if the manufacturer has stopped updating?
Officially - no. However, there are unofficial methods such as installing custom firmware (Custom ROM). This is a complex process that requires unlocking the bootloader, which may result in loss of warranty and data.
What is the difference between Dalvik and ART?
Dalvik is an old virtual machine that compiled application code every time it was launched. ART (Android Runtime) is a modern environment that compiles code into machine code when installing an application, which speeds up its operation, but takes up a little more memory space.
Why do some applications not work on my Android?
Application developers indicate the minimum required OS version. If your version OS is older than required, the application may not install or work incorrectly due to the lack of new libraries.