For questions about the internal procedures and processes of the Android system.

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56
votes
4answers
114k views

How can I uninstall applications that are locked by phone vendor?

I'm using a Samsung I9000 and I have some annoying apps that came pre installed by the phone vendor, like a music store, a custom web browser and other memory leaking apps. Those crappy apps can't be ...
33
votes
3answers
31k views

Is Android a 32-bit or 64-bit OS?

The title is pretty much self-explanatory: is Android a 32- or 64- bit OS? I assume that it is one or another and not both, as that would force both 32- and 64-bit binaries to be hosted on Google ...
17
votes
2answers
25k views

How can I deal with unwanted system applications without rooting?

There are a lot of system apps in my mobile that I do not use, and have no intention of ever using. I know that is is possible to uninstall system apps and bloatware with root, but is it possible ...
16
votes
3answers
18k views

What's the meaning of signal strength colors in battery usage screens?

The battery usage screen has an indicator for "Signal strength" that, instead of being blue/black like WiFi, has many colors: green, gray, yellow. What's their meaning?
14
votes
3answers
25k views

What are the differences between a system app and user app?

As I've played around with different ROMs and used Titanium Backup, I see that apps are categorized into system and user apps. Several ROM developers state that Titanium Backup should only be used ...
11
votes
4answers
103k views

What is SNS App?

I'm using a Samsung Galaxy I551 with Android 2.2 FroYo. Sorry for my ignorance, but I have not idea what is that app (which came installed and without rooting can't be removed). And it is using 15MB ...
11
votes
5answers
10k views

Disable USB charging

For some reasons not related to the battery life, I need to disable the battery charging when a USB host is connected to my phone (a rooted Nexus 4). Taking a look around on the internet (link1, ...
9
votes
3answers
19k views

Is possible to make symbolic links in the android filesystem? (and how?)

Is possible to make symbolic links in the android filesystem? (and how?) Thanks in advance :) . (My Android version is 2.1 , i'm using Motorola Defy)
9
votes
1answer
3k views

How is the default PATH set?

On another linux system I might expect to find a .profile file, or something in /etc used by default. I'm unable to determine what sets the system path for processes not running in a shell.
9
votes
1answer
801 views

Hiding System icons in Notification area?

Does anybody know a reliable way to remove system icons from the notification area? I have a smaller screen on my (rooted, default ROM) Optimus T and I find some of the system notifications icons ...
7
votes
2answers
4k views

Is it possible to write to a device's clipboard using ADB?

I am interested in learning how to write to (and if possible, read from) a rooted Android device's clipboard. I hope to do so using ADB over USB and I am not interested in installing any apps to help ...
7
votes
3answers
2k views

Choosing apps to load and remove from memory when using Android

I'm not a programmer. And as far as I know, Android uses as much RAM as possible, loading as many apps as possible, so that launching / opening (or returning to them) is smoother. My question is: Is ...
6
votes
3answers
16k views

What is the effect of changing the maximum application VM heap size?

The settings menu in CM6 lets you change the maximum per-process heap size (internally, that’s the dalvik.vm.heapsize property). What are the practical effects of raising or lowering that setting? On ...
6
votes
1answer
21k views

Which system files are safe to delete?

I got only 160MB internal storage out of which 100MB is reserved by android operating system. Which System files and folders are safe to delete? For example: de, fr, es and it files in ...
5
votes
1answer
1k views

How can I monitor and visualize the current resource usage (CPU, Memory, etc.) caused by the running Apps?

I am looking for typical per app/process resource usage information (CPU, Memory, etc.). This information is often useful to find and identify misbehaving apps. How can I monitor and visualize the ...
5
votes
1answer
7k views

Can I convert a system app to a user app, uninstall it, or move it to my SD card?

Is it possible to convert a system app to a user app and then uninstall it or move it to SD? I'm thinking about not critical apps, such as Astro filemanager (I use Root Explorer), Google maps, Google ...
5
votes
2answers
13k views

How do I install an apk as a system application?

I'm trying to install an application in the system/app folder of a device. It needs to be done since I'm writing a QAT program and the tests need to run with a few privileges not available to third ...
5
votes
2answers
339 views

What system app stores the cellular network settings?

Before installing a new ROM, I backed up all data from my system apps using Titanium. I installed the new ROM, and also put in a new SIM card from a different network (so it was in on first boot-up ...
5
votes
1answer
8k views

Is there an internal memory test for Android devices?

I need to fix a friend's phone this evening that has suddenly produced loads of android.process.media and com.google.process.gapps errors. I am going to reinstall the OS as it's an older ROM but it ...
5
votes
0answers
2k views

How to prevent shutdown when low battery? [closed]

When I'm using my hacky backlight modulation program which toggles screen off and on fast enough to simulate ultra-dim brightness Android sometimes gets wrong info about battery charge (it sees 0% 0V ...
4
votes
3answers
222 views

How does a phone store date and time even when the battery is removed?

I have seen android phones which do not ask users to set the date and time even if I remove battery and reinsert and start the phone. If I have a SIM card inside it, I understand it fetches date and ...
4
votes
3answers
3k views

Does the Android OS provide any overheating protection?

Apple iOS devices display the following warning and suspend operation should they overheat: Temperature [iDevice] needs to cool down before you can use it. Does the Android OS contain ...
4
votes
1answer
1k views

Is it possible to disable the system update notification?

I have a Nexus One that I want to keep at v2.2 for testing purpose. But the update 2.3.4 has been pushed to my phone and I keep seeing the notification to install it. Is it possible to disable the ...
4
votes
1answer
5k views

What is “Android Night Mode”, what triggers it, and what are the consequences?

I've just been reading in the tasker UserGuide on variables: Night Mode %NIGHT The current Android Night Mode. One of on, off or auto. If auto, Android will decide whether it should be in ...
4
votes
1answer
869 views

Possible Soft-Brick Fix for my Galaxy S4

So, prior to my stupidity, I made a system.img dump via dd However, after my stupidity (tried flashing some lib files....), I am now stuck with only stock recovery mode, or download mode. How can I ...
3
votes
4answers
3k views

Free system information for Android such as Everest for Windows

There is any apk that shows the system and hardware information about my Adroid phone??? I mean an aplication such as Everest (or msinfo32) does for Windows.
3
votes
1answer
98 views

Where does shared prefrences data are stored in Android device?

I want to know where Android stores the data of SharedPreferences in actual Android devices? In PC I found this data under /data/data/pkg_name/shared_prefs/pkg_name.xml
3
votes
1answer
21k views

How to mount system in rw mode if no custom recovery

When I changed my build.prop for spoofing another device model, I copied build.prop from another device having gingerbrad but my system is froyo. When I rebooted, I lost my internet connection. It ...
3
votes
2answers
525 views

Toshiba Thrive, changing system font

I am currently running the Favum 1.1 ROM on my toshiba thrive, and I tried to use Font Installer to install a new system font. For some reason the font will install, but the actual font on my thrive ...
3
votes
1answer
135 views

Phone starts playing podcast for no apparent reason

This started yesterday, and I have no idea why. I noticed my phone was playing a podcast. I've been using BeyondPod for a while, which is sometimes a bit wonky, but never had this kind of problem. I ...
3
votes
1answer
5k views

How can I install additional audio/video codecs on Android?

Does android separate the module between video player and video codec? If so, how do we install more codec to the system?
3
votes
0answers
738 views

Is it possible to disable confirmation dialogs in Android 4.4?

I have an LG G2 which came with Jelly Bean, and I have recently updated it to Kit Kat. I have noticed that the amount of confirmation dialogs when changing phone settings seems to have gone up from ...
3
votes
2answers
7k views

Media Storage: what is it, and why is it using all my data?

I am only 5 days into my Billing cycle, and noticed that already like 1/3rd of my data has been used (thanks to My Data Manager)... So I looked to see what has used all this data, and it says it is ...
2
votes
2answers
997 views

How to switch on/off system load and running processes overlay

Somehow I have managed to get my Android phone (HTC Wildfire running Cyanogenmod 7.1 / Android 2.3.7) into a state where the system load (in unix uptime format) and running process list is constantly ...
2
votes
1answer
344 views

What Android parts do these terms describe?

Android users frequently use a lot of words with unclear meanings. In particular, they use these words a lot: Framework / framework-res.apk: What purpose does this structure serve? Flashing: What ...
2
votes
1answer
7k views

Running TRIM from shell

Is it possible to run fstrim in stock android 4.3 from adb shell? I understand it runs every 24 hours when the device is plugged in and idle but I would like to run on demand to test a few theories.
2
votes
2answers
17k views

How to manually disable or hide the system bar (menu bar) at the bottom of the screen?

I am using an ASUS Transformer TF300 with Android 4.1.1, and there is an app that shows the playing cards at the bottom of the screen, and show the "Continue" button when the card game is finished. ...
2
votes
1answer
434 views

Details on Android OS massive data usage

Yesterday Android OS on my Nexus 5 transferred 44,7 GB (!) data over both WiFi (42,2 GB) and mobile data (2,5 GB). I have no idea why the data transfer started, and I have no idea why it stopped after ...
2
votes
1answer
3k views

How can I monitor my phone's activities?

A couple of times I've found my phone turned off when I don't remember doing so, especially when I have a fully charged or nearly full battery. Are there any applications out there that will monitor ...
2
votes
1answer
2k views

What's the difference between Camera.apk and com.sec.android.app.camera.apk?

I'm trying to install a modified version of the Camera app on my rooted Samsung Galaxy S (Captivate) through copying to /system/app and through installing a zip file via ClockWorkRecovery. It doesn't ...
2
votes
2answers
141 views

Is It Possible To Backup Settings And All Customized Stuff I Made On Android Cellphone?

Which backup is that? Full backup that backs up whole system? Or is it only backup that backs up settings and customized stuff?
2
votes
1answer
6k views

How to give root access to apps that don't request it?

I've been using the app SystemPanel for some time now to archive my Android apps. It works great, but it cannot archive apps that have been installed under /data/app-private, because this directory ...
2
votes
0answers
7k views

Is there a list of android system status bar icons?

I'm not sure what some of the status bar icons mean on my Android Nexus 5 device (I'm referring to the icons in top right of screen, adjacent to the time). I've googled frequently but I keep getting ...
2
votes
0answers
648 views

Music playback stops randomly

I have bought the Xperia ZQ (Xperia ZL's alias in Brazil) C6503. I am experiencing a very annoying problem: from time to time the audio playback in any audio app just stops. If I hit play again it ...
2
votes
0answers
60 views

Is it possible to change the system language to Japanese? [duplicate]

I was wondering if it is possible to install Japanese as a System Language on my Android phone (Samsung Galaxy S2). My friend is from Japan and wants to buy her smartphone in Europe - but she wants to ...
2
votes
0answers
752 views

How To Disable htcCheckinService?

This process causes CPU spikes and sometimes incredibly slows down whole system. I need to know how to disable it. Tried with Quick System Info PRO but it won't allow me to end process or close it. ...
1
vote
2answers
249 views

Why are apk files are kept in system folder?

Isn't an apk files just an archive which is unpacked when you install a package? So, why should it be kept then?
1
vote
1answer
164 views

Where is the Home folder?

On my linux system I have a directory in /home where all my personal files and local program configurations are stored. Where does Android store that type of file?
1
vote
1answer
1k views

Does Flashing Stock ROM in Odin Clear out the System Partition First?

Does Flashing Stock Samsung ROM in Odin Clear out the System Partition First? Options Used: No repartition, ROM put inside PDA slot I'm wondering because I suspect there may have been some malware ...
1
vote
1answer
324 views

What might cause my phone to spontaneously stop booting into its custom ROM and only reboot into recovery mode?

My phone is a Samsung Vibrant running CyanogenMod 10.0 (Android 4.1.2). I rebooted my phone, as I do every few days, and instead of starting up CyanogenMod as usual, it dumped me into the ...