[Q] Does Android user interface support 4K UHD resolution? - General Questions and Answers

I'm looking to develop an android app to be used on a 3840x2160 4K/UHD display using an Android miniPC that supposedly supports "4K resolution."
I have a few different Android miniPCs (all Android 4.4) and they all play 4K videos fine. Also, for all of them, the 3840x2160 resolution was selected in the Display settings in HDMI mode . However, when I display a UHD equivalent image using an image viewer, the image looks to be scaled up from a smaller size. When I download apps from the Google Play store that measures the resolution of the device, they all report that the device is displaying at 1080p.
I believe these 4K Android miniPC can decode 4K video, but the user interface is still being displayed at 1080p despite what is selected in the Display settings. There is an article from cnx-software that blames the type of processor for these types of devices not being able to support UHD resolution. (i would provide links, but unable to include them as a new forum user.)
Is it really the processor limiting the device? I find it hard to believe the processor can display 4K video, but unable to support a 4K user interface. So my question is, can Android support a user interface and an app at 3840x2160 resolution? If so what would it take to support it?
Thank you in advance for any insight you can provide.

I have Beelink R28 box and it has the same behavior. It seems that Android doesn't support UHD resolutions and wonder why there are no any information about this.

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Changing Screen Resolution to 1920x1080

Hi,
I bought the k1 and rooted it using your tutorials but as I record gameplay to youtube I get the nasty black sides as the native resolution is 1920x1200 I have tried to change it using some apps on google playstore but without sucess it messes up with the controls and the whole system gets messed up.
So as I new to android devices user (ex-iOS ) user I migrated to android but the screen resolution is bugging me is there a way to chage it to native youtube videos 1920x1080?
Thanks
And if you asked I tried different recording softwares and they all fall into de same problem
Native resolution is the resolution of the screen, then you can't do it....
1920x1200 is 16:10 resolution, then i think you can't use a 16:9 like 1920x1080

Can not Crop video - ONLY Stretch - Amlogic S812 Android TVbox and SONY AndroidTV

Dear All,
I just bought an Amlogic S812 the Android TV box to replace the old one (Allwiner A31s Android TVbox)
Currently when watching movies with the software MXplayer , it can not Crop the Screen Size to remove black place on top and bottom of screen, it only can use Stretch option to stretch vertically, does not stretch horizontally, so making everything in movies stretch out :crying:
I do not experience this problem on older devices using Allwiner A31s chip.
Pls help me fix this issue
P/S: I face this issue on SONY Bravia 55X9000C Android TV too.
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Anybody??
Same issue with the newest s905x3 chipset, Android 9.0... I don't have all the options in my settings, I can't even place apps on homescreen using Nova Launcher, I can't see the bottom drawer to open all running apps. Do manufacturers modify the Android version they put on these boxes? Is there a way to fix these issues, especially the video player cropping? In my box no player can crop, only stretches vertically, leaving me with an incorrect aspect ratio.
Hi everyone.
This may be a solution.
I get to realise that this thread has a long history and there is no proper answer.
I too had the same problem while using MX player in Android tv. But some video are able to crop view. After many thoughts I get to realise that there are two kind of popular encoding in mkv format.
Videos encoded in H.264 have no problem. But if it is H.265 commonly known as HEVC it will no crop or zoom in.
I currently use H.264 video for maximum use of my tv screen.
Please Google these encoding method for better understanding. There are some interesting comparison between two.
Happy watching

Looking for android box with 4K / UHD resolution for APP's

Hello,
I hope someone can help me. I'm looking for an android box which is capable to run Apps in 4K or UHD resolution. I have tryed a MINIX X68-i, DSDevices DSCS9 and a Sony FW-55XE9001 TV. They are capable to output video in 4K, but all the other Apps run only in FHD and will be upscaled. The device must be rooted and have auto power on function.
Bye,
Christian

Android TV support for Ultra Wide Displays like WQHD 3440x1440

What is Android TV support for "irregular" display resolutions?
I cannot find the answer anywhere online so I turn to the experts. I found conflicting answers, most to the negative, but no definitive explanation.
The story:
I recently bought an ultra wide monitor (Samsung S34J550 with 21:9, 3440x1440 WQHD resolution) to work from home that I occasionally would like to use as a smart TV in the living room, without hooking a PC and HDMI cable to it. Currently I can see some Netflix movie in full screen when played from my PC via HDMI to the Samsung monitor. For convenience, I'm looking for a PC-less solution where I would remotely control the device. I'm ready to buy an Amazon Fire Stick 4K or any other Android TV device, or a ChromeCast as long as I can leverage the full ultra width for 21:9 movie playback.
Would any Android stick adapt to a WQHD resolution? Or only 4K sticks? Amazon Fire 4K? Google ChromeCast? None of the above? And if not, what are my options?
Alternatively, a lower 21:9 resolution would still fine with me for movie watching. Like 1/4 of full resolution: 1720x720.
TIA
Same
I have exactly the same situation, 3440x1440 display, and it is annoying to be forced to use a laptop for proper 21:9 watching experience.
Support for wide formats is needed for Android TV.
I am using Xiaomi's Xi Box S as it claimed to have support up to 4K resolutions. Unfortunately only regular 16:9 modes seem to be supported so have to use it at 1080p only.

Custom HDMI resolution for Chromecast with Google TV

Hello my beautiful people, I come to you in a moment of great desparation and would really appreciate some help here.
So, I just bought a Chromecast with Google TV.
- Model: GZRNL
- Codename: sabrina
- Mfg Date: 11/2021
I want to connect this thing to my projector and want to run it's native resolution (4:3 aspect ratio).
But I can only select resolutions with a 16:9 aspect ratio in the settings.
I do not have root access, nor can I root the device (BootROM Bug has been patched, It's a newer device.).
I can change the virtual screen size using `wm size`, but that does not effect the HDMI resolution.
So here's the main question: How can I set a custom resolution for the HDMI port?
One approach I thought about is: Find out what settings the GUI sets and write custom values to these.
I attached a section of logcat in which I change the resolution from "720p 60Hz" to "1080p 60Hz" in the GUI.
Sadly that's where my android knowledge ends.
I am happy to try things or provide additional information.
Thanks.

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