Questions tagged [operating-system]

An operating system (OS) manages the computer hardware in a device, such as the screen, keyboard, memory or wireless devices, performs basic control and maintenance of the running device. It also provides a software platform and services that applications can run on. Android is an OS, as are Microsoft Windows, Mac OS and Linux.

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Upgrade Asus Zenfone 4 Z01KD to > 8 OS

As of September 2022, Slack will stop supporting the app for Android OS versions earlier than 9 (Pie). I have an Asus Zenfone 4 Z01KD mobile, stuck at Android 8. I have read suspicious guides online ...
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Stores the OS a list of installed apps and their install locations?

Some time ago I made a backup of the internal data partition with TWRP. Then I installed and updated some apps in the adopted storage. Due to some other issue with the phone, internal data was partly ...
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Where is the Android Framework API package located?

When creating an android app, at what point is the android framework API package added into the apk? To my understanding the android framework is build into the OS itself and installed apks are given ...
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Is app_process executable directly?

When I ran the "file" command on app_process32 and app_process64, they are listed as shared objects (so files). From my understanding, .so files are not directly executable. However, based ...
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How can I see a log of system changes that have been made to my phone?

Recently my phone suddenly exhibited weird behavior which I remedied by running com.google.android.setupwizard/.SetupWizardTestActivity. You can see the exact problem and solution here. Everything ...
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Offbrand Android states one OS but shows another in linked apps

I recently bought a generic 10" tablet by E-CrossStu that stated it is on Android 11 with 512GB storage with 4GB RAM. I thought this is a great deal for $100. I am now going through trying to add ...
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How can I fix this apk not uninstalling problem in my custom rom?

I like custom ROMs very much. And this problem is regarding issues that I get while uninstalling an app in a specific unofficial rom. Let's start from the beginning: I downloaded this rom from this ...
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No “Enable OEM unlock” option on Meizu M2

I’m trying to set PostmarketOS to my sister’s old phone and now I’m stuck with an interesting trouble: in developer settings there’s no option to allow OEM unlocking. USB debugging is on, tried many ...
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How to stop Samsung S7 from wanting to update Android version?

I'm using my old Samsung S7 to test apps (that I develop) on Android 8.0.0 (Oreo). But every time I come back to my phone the below screen (Program Update) appears and the phone wants to do an system ...
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How can I pretend to give microphone permission to app, without actually giving it a real microphone access?

I have an app I would like to use, that requires BOTH Microphone and Camera access, when I only want to grant it Camera access. I can choose to disable one or the other, but the app will not work ...
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How can I reduce the CPU time used by an app?

I have an app that's draining the phone battery and heating the phone when it runs. (Everything is fine when the app isn't in the foreground.) The app itself is a simple game that shouldn't need a lot ...
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Change tablet OS

I have an old android tablet. I want to install another OS on it. I am afraid of problems after installation. Is there a way to return to exact previous OS (android 5.1.1) if I have problems? Tablet: ...
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Would the Amazon Fire OS count as Android?

I am wondering if the operating system on the Kindle Fire would count as an Android-based OS.
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Can I disable OEM lock from computer?

Can I disable the OEM lock of my Samsung Galaxy S8+ from my computer?
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Is it possible to buy a used Samsung phone with fake/hacked Android ROM that looks like the official one and may spy on you?

I have a used Samsung phone. I wonder if it is possible to have a malicious ROM uploaded that looks like the official one that may allow the hacker to spy on the user. Can I make sure that I have the ...
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Alternative OS for Nokia XR20 [closed]

Does anyone know any existing OS (other than Android) that works for Nokia Xr20. or if not, is it fairly quick to Port an existing OS for this phone?
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Not able to flash any os on my phone

Hi One day i tried to install a custom OS on my old phone it was already rooted and a custom recovery was also installed (TWRP) after i booted into recovery i wiped cache and installed evolution x it ...
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Redmi 4X (santoni): Abruptly shuts down just before booting into OS

Here's a TL;DR - I can't boot into my OS,phone shuts down after being in boot screen for some time but I can boot into fastboot and recovery. I flashed another custom ROM after formatting my device ...
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Booting Fairphone Open OS automatically after sideloading from TWRP

After writing a bash code that automatically installs LineageOS on the Fair Phone 2 (FP2), I am also implementing the "reverse" OS installation, from LineageOS to Fairphone Open OS. From ...
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Automatic app opening + power, home button not working J Max [SM-T285YD]

My device is Samsung J Max (SM-T285YD). I can go onto download mode, recovery mode. Even after restart power button also working. But after sometimes suddenly it opens chrome, google automatically. ...
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Can 2 mobile devices detect each other's presence using NFER technology?

If 2 mobile devices are in the same room can they identify each other or detect the presence of each other by using Near-field electromagnetic ranging (NFER) technology ? And the second question is ...
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What makes the android boot sequence different from Windows boot sequence?

I've just studied the Windows boot process (theoretically) and now I want to compare the Android's boot sequence with the Windows boot sequence. One point I've found is that in Windows there is BIOS ...
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Why don't I get notifications from messaging apps on my phone?

If I don't have the app open, I don't get messages that people send to me. When I open the app, I see unread messages. I have seen this with LinkedIn messages, Quora messages, and Signal recently (...
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2 votes
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Apps go portrait and then landscape unexpectedly

When I updated my Motorola Moto G9 Plus to Android 10, when going landscape watching videos or playing videogames (after some minutes, repeatedly) go portrait and after 1 to 3 seconds return to ...
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If we want to give the apps fake geolocation datas is it enough to change only the GPS data or i need to change all datas that are transsmitted?

When we change the GPS data using fake GPS app the cell id of our BTS still shows completely different region (the region of our real location). Isn't that enough for third-party applications to ...
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Is it possible to change the geolocation settings or completely disable geolocation for smartphone with developer mode?

Can I change the geolocation settings with developer mode? For example make the main positioning mode with using only WI fi network instead of using GPS +GSM +WI fi? Or it can be done only with root?...
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Custom rom can I trust? Can I install pure android instead?

I have a "galaxy tab E" device, it is old in years, but it is quite new because I don't use it very often. The problem is, it has android 4.4.4. I notice it has a custom rom to install ...
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How can we trick an android device that the device does not get our real location?

Is it possible to make the Android Operating System receive false location data or not receive any data about our geolocation at all. And how we can do it in the maximal clean way so that the third-...
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2 votes
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How to reinstall of Android on a tablet?

I am learning Android app development. I wanted a cheap tablet to test how apps looked on tablet as opposed to mobile. I bought a cheap tablet from wish.com. OK, stop laughing at that last bit... it ...
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Upgrade HCL ME V1 tablet to make it usable again

I have HCL ME V1 tablet : preinstalled with Android 4.0.4 (Ice-cream Sandwich) OS. It has 4GB of internal SD memory 1GB DDR3 RAM and 1 GHz, Cortex A8 processor It used to work fine when I had bought ...
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Is it possible to run old apps on newer versions of Android? If so, how?

I'd like to run an older app that is no longer compatible with my current OS. However, I don't want to set my device back to an older OS. Is there any way to make old apps work with a newer OS, or is ...
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Where are the download images for Android?

I'm attempting to update my older Samsung 10.1 to a newer version of Android (7.1) which has been confirmed on a few sites that it's working. However, the only download links I've found are on sites I'...
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How to stop notification sound from playing three times?

I noticed several years ago after getting a new phone that newer versions of the Android software seem to play my notification sound three times. Prior to this phone it only ever played once. It gets ...
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installing lineageOS on Huawei VNS-L31

I want to install LineageOS on my phone, Huawei VNS-L31 but I'm afraid that it couldn't be supported especially after I couldn't find it on lineage website but found some websites that claim it could ...
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Can I install Android using Android studio on any supporting devices?

I have a Samsung phone. I don't know anything about installing Android and about Android Studio. Can I install Android on it using Android Studio?
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Is it Possible to Create an Operating System for Android Devices?

Is it possible to run an operating system other than Android on Android devices? I know that the bootloader is hard-coded into the firmware and even if you tried you can't change what it does but what ...
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is it possible to install linux on android?

Is it possible to install open-source Linux distribution like Ubuntu on Android Device? If so, how would this be accomplished?
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Pixel 3A Android 10 Assistant auto comes on and stops gesture, unable to reset connected devices [duplicate]

I have a brand new Pixel 3A with the recently updated Android 10 update. Google Assistant has been activated while in my laptop bag. I'm assuming this is because of the incessant urgings that Google ...
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How does Android OS do DNS name resolution?

I am learning about how Windows does name resolution and need to know how Android does it so an app will work on my Windows laptop and from my Android Phone. Borrowing from a post on superuser.com, ...
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where does the official, "non-custom firmware" Android os look for version updates?

When the "new update is available" popup appears on the screen, does the os go to the manufacturer's server or the google's servers to download the update? in other words who is the main version ...
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OS-independent app loading problem

My phone has an odd problem, and I don't know where to start in diagnosing it. Several apps started having problems opening, taking a very long time (sometimes several minutes) to open; sometimes they ...
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Does Android 8 has journaling enabled in its ext4 files sytem?

Android 8 uses stackable file sytem called sdcardfs, which emulates FAT32 on ext4 on the data partition. Does sdcardfs recognize the ext4 file system and journaling? In other words, files written ...
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4 votes
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32-bit and 64-bit Android: how to tell before buying a phone [duplicate]

I have been looking into 32-bit or 64-bit Android versions for phones. It seems to me that the information on the number of bits of the installed Android version is always missing from phones' specs, ...
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Android NetHunter can't find several files

I'm trying to get KaliNethunter to work on my OnePlus5. I'm facing a problem though, and I really don't know what to say of it. There are several errors and they're all No such file or directory. ...
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Anyway to make blue light filter App include the notification swipe-down area?

From initial Googling it seems that it's an intentional issue in later Android OS versions, that blue light filters (Apps) cannot have any effect on the swipe down notification area. I was just ...
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Will Android be able to install OS updates without Google account?

I am working with android phones at work, we want to remove all google accounts from the phones before we give it to our customers. I know that the phones are not able to receive app updates, but ...
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What steps are taken by the OS when an app is uninstalled?

I recently reported bug for two apps that I use. The support guys replied that I need to delete cache and unblock notifications, set battery optimization and putting that app to sleep to turned off. ...
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What position do cellular communcation (1G, 2G, 3G, 4G or other function only implemented in phone) play in Android operating system archtecture?

I am entirely new to Android, but have a little knowledge on Linux. I have view the architecture graph of android on official site: The Problem: Not all android device support cellar network. As a ...
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How would I go about purposely disabling all microphones on an Android phone?

I'm attempting to repurpose older Android phones, and I'm looking for a way to disable the microphones to avoid having spy-accessible microphones all over my house. Is there a way of removing or ...
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3 votes
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How does android dm-verity protection validate blocks with hash tree

I am learning about android dm-verity protection and I try to understand how does the android dm-verity uses the hash tree for validation of "single block". https://source.android.com/security/...
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