Modern smartphones have excellent displays, but when launching popular games, users often encounter an annoying problem: the image does not occupy the entire screen. Black bars on the sides or top and bottom not only spoil the visual impression, but also narrow the field of view, which is critical in competitive shooters. This problem occurs due to a mismatch aspect ratio the screen of your device and the resolution that a particular game supports.
In most cases, the situation can be corrected without obtaining superuser (root) rights. Android offers flexible interface customization tools that allow you to force content to stretch. However, you should understand that the solution methods depend on the model of your gadget, the version of the operating system and the optimization of the application itself.
In this article we will analyze in detail why image artifacts appear and provide step-by-step guide for eliminating them. We will look at both standard system tools and advanced methods through the engineering menu. The safest way is to use the built-in scaling functions in the screen settings or the manufacturer's game mode. Let's start with an analysis of the reasons.
Reasons for the appearance of black fields in mobile games
The main reason lies in the variety of smartphone form factors. If a few years ago the 16:9 ratio was the standard, today manufacturers are experimenting with elongated screens 19.5:9, 20:9 and even folding displays. Game developers are physically unable to test their product on thousands of hardware combinations, so they often choose a conservative resolution.
When an application starts, it asks the system for available space. If the game is not optimized for notch or the on-screen camera, the system may automatically add padding, creating black areas. The problem is also relevant for old games that simply cannot work with high resolutions of modern panels.
⚠️ Attention: Some online games may block launch or generate an error when they detect changed system screen parameters. This is a protective mechanism against cheating.
Sometimes the culprit is not the game itself, but the scaling settings in the manufacturer's shell. For example, Xiaomi, Samsung or Huawei can launch applications in compatibility mode by default. This provides stability but sacrifices image area. Understanding the source of the problem is the first step to solving it.
- 📱 Mismatch between display aspect ratio and game rendering.
- ⚙️ Activated one-handed mode or interface scaling.
- 🎮 Lack of application optimization for modern resolutions.
- 🔒 Limitations imposed by the developer to maintain performance.
Screen and scaling settings in Android
The first thing you need to check is the basic display settings. Many modern shells have a feature that allows applications to use the entire screen area, ignoring the cutouts for the camera. Typically, this option is hidden in the display settings section.
On devices Samsung you need to go to Settings → Display → Full screen applications. Here you will see a list of all installed games. Find the problematic application and switch the toggle switch to the "Full screen" position. A similar path to Xiaomi (MIUI/HyperOS): Settings → Advanced settings → Full screen mode.
☑️ Checking basic settings
If there is no standard switch, try changing the screen resolution. In the Settings → Display → Screen resolution section, select the "Maximum" or "Default" option. Sometimes the system automatically selects the low-resolution economy mode, which creates banding. It is also worth disabling the "Enlarged text" function or changing the font size, as this affects the pixel density (DPI).
After changing the resolution or DPI, be sure to completely close the game through the running applications menu, and not just minimize it, so that the settings are applied correctly.
Using the engineering menu and DPI
If the standard settings do not help, you can resort to more fine-tuning through the developer menu or the engineering menu. Changing the dots per inch density (DPI) allows you to force a change in how the system renders the interface. This is a powerful tool, but it requires caution.
To access. go to the developer menu Settings → About phone and quickly click 7 times on the "Build number" item. After this, a new section "For developers" will appear in the settings menu. Inside, find the "Minimum width" (or "Smallest width") option. Write down the original value to be able to roll back the changes.
| Parameter | Standard value | Recommended for games | Effect |
|---|---|---|---|
| Minimum width (DPI) | 360 - 411 | 320 - 340 | Increases elements, can remove stripes |
| Screen resolution | Depends on the model | Maximum | Increases clarity, fills the screen |
| Interface scale | 1x | 0.8x - 1.2x | Global changing the size of the UI |
Change the DPI value gradually, in steps of 10-20 units. A value that is too low can make the text unreadable or cause system crashes. After each change, reboot the device. This method is effective, but not universal: some games ignore the system DPI and use their own profiles.
⚠️ Attention: Do not set DPI values to extremely low values (less than that). 200), this may lead to the fact that you will not be able to access the controls in the settings menu, and you will have to reset to factory settings.
Specific settings for Xiaomi, Samsung and Huawei
Chinese manufacturers and the Korean giant Samsung implement own game engines that intercept control of the display. On smartphones Xiaomi and Poco there is an application "Game Turbo" (or "Game Acceleration"). Inside it, you can add a game and activate the "Full screen" or "Remove cutout" function.
In devices Huawei and Honor use the "App Twin" function or the settings in the "Performance" section. Sometimes it helps to disable the "Simple mode" or "One-handed mode" function, which specifically reduce the work area. Samsung it is also worth checking the "Game Launcher" and the settings inside it, especially the "Show camera cutout" item.
Secret command for some Xiaomi
Enter the code in the dialer ##6484## to enter the engineering menu, where you can check the display calibration, but be careful when changing parameters without knowledge.
Owners of devices with teardrop-shaped cutouts or holes in the screen should try to hide the cutout programmatically. In the display settings there is often an option to “Hide the cutout” or “Shade the camera area”. This will turn the top bar into part of the black status, which will visually expand the playing field, although the pixels below the cutout will not be physically used.
- 🎮 Xiaomi: Game Turbo → Game Settings → Full Screen.
- 🌌 Samsung: Game Launcher → 3-dot menu → Show camera cutout.
- 🌺 Huawei: Settings → System → Navigation → Hide the cutout.
- ⚡ OnePlus: Game space → Graphics settings.
Using third-party utilities and ADB
When built-in functions are exhausted, third-party applications come to the rescue. Utilities like SecondScreen or Universal Android Debloater (via PC) allow you to control the display parameters more deeply. However, the most powerful tool remains ADB (Android Debug Bridge).
To use ADB, you will need a computer and USB debugging enabled on your phone. By connecting the device, you can send a command to change the size. window. The command wm size shows the current resolution, and wm density the density. You can force the resolution with the command:
adb shell wm size 1080x2340This command makes the system think that the screen has a different resolution, which often causes the game to stretch. To reset the changes, use the command adb shell wm size reset and adb shell wm density reset. This is a professional method that requires care, but gives results where other methods are powerless.
Using ADB commands is the most radical method that works at the system level, but requires a PC and minimal technical knowledge.
Solving problems with the camera cutout and notch
Games that incorrectly process the area around the front camera deserve special attention. Instead of stretching the picture, they can shift the interface or leave a black stripe in the cutout area. In such cases, the “Screen Extension” function helps.
In some launchers (shells), you can activate a mode that programmatically “cuts” the top of the screen, making it a black status bar, thereby aligning the usable area to the standard ratio. This is a sacrifice of quality for the sake of filling out the sides. An alternative is to use modified versions of games or patches, but this may compromise the integrity of the files and lead to a ban in online modes.
If the game is old and does not support modern resolutions, a black bar may be the only way to maintain the correct proportions so that round objects do not become oval. In this case, it is better to put up with the stripes than to get a distorted picture that interferes with gameplay.
Why can’t black bars be removed in some games?
This is a limitation of the game engine itself. If the developer has hardcoded rendering to a specific resolution (for example, 16:9) and has not added support for dynamic scaling, Android system settings will not be able to override this setting without risking breaking the interface.
Does removing black bars affect performance?
Yes, it can. Stretching the image or rendering at a higher native screen resolution increases the load on the GPU. On weak devices, this can lead to decreased FPS (frames per second) and increased heating.
Is it safe to change DPI through the developer settings?
Changing DPI within reasonable limits is safe. However, setting extreme values may make the system unstable. The main thing is to always remember the original value in order to return everything as it was in case of problems.
Will resetting the phone settings help?
Resetting to factory settings will help if the problem is caused by a software glitch or a conflict with third-party applications that change the interface. If the game is simply not optimized for your screen, resetting will not eliminate the black bars.
What to do if the touchscreen disappears after changing the settings?
If after changing the DPI or resolution the touchscreen stops responding correctly, try quickly connecting a USB mouse (via OTG) and returning the settings back. If this is not possible, you will need to enter Recovery Mode and reset the data (Wipe Data).