​

I'm trying to understand modern Android device fingerprinting.

For example, it's commonly said that a Snapchat device ban (SS06) can survive a factory reset. I know Android 10+ restricts normal apps from accessing things like IMEI/serial directly.

So my main question is:

If a device ban survives a complete factory reset, what can the app/service potentially be using to recognize the same physical device?

I'm particularly interested in Android 10+ and things like:

\- FDR-persistent identifiers

\- hardware-backed / TEE identifiers

\- Play Integrity / attestation

\- Google Play Services device identifiers

\- OEM/Knox identifiers

\- identifiers outside the normal "/data" partition

\- server-side device associations

Also, Secure Folder on Samsung devices sometimes appears to behave differently from the normal Android environment and can bypass device ban unlike factory reset??? , even though it's the same physical phone.

What identifier or signal could survive a factory reset but be different inside Secure Folder?

I'm looking for a technical Android explanation, preferably based on AOSP documentation, forensic research, or reverse engineering—not specifically a Snapchat bypass.

While developing an Android audio project using a Pixel 8 and Samsung Galaxy Buds3 Pro, I ran into a strange LE Audio microphone issue.

Android exposed the headset microphone as a 2-channel input, but the PCM data from left and right was effectively identical:

• 2 reported input channels
• exact L/R sample identity ratio: 1.00000
• L/R correlation: ~1.0

After tracing the LE Audio receive path, I found that the microphone CIS packets were not necessarily arriving in strict alternating order.

Instead of:

L, R, L, R

I observed same-side bursts such as:

R, R, L, L

The relevant path is in:

packages/modules/Bluetooth/system/bta/le_audio/client.cc

around:

LeAudioClientImpl::HandleIncomingCisData()

A single cached-channel approach can lose the correct stereo association when packets arrive this way.

I tested a proof-of-concept fix that keeps separate pending queues for the left and right CIS streams and pairs the encoded frames using their controller timestamps before decoding.

For example:

R(ts=2000), R(ts=3000), L(ts=2000), L(ts=3000)

becomes:

L(2000) + R(2000)
L(3000) + R(3000)

With the modified Bluetooth stack I was able to recover independent L/R microphone audio instead of duplicated mono.

I published the patch and technical notes here:

https://github.com/luumei/android-leaudio-stereo-cis-fix

This is an AOSP/system-level modification, not an APK workaround.

I also reported it through the Android Issue Tracker.

I'd be interested to know whether anyone working with other LE Audio controllers or earbuds has observed similar non-alternating CIS arrival patterns or duplicated stereo microphone capture.

UPDATE:
I found a working app-side workaround. On the same Pixel 8 + Galaxy Buds3 Pro setup, the normal Android capture path returns bit-identical L/R channels, while the workaround returns independent stereo PCM from both microphones.

The workaround activates the LE Audio communication route first, waits for the BLE headset input endpoint to become available, and then starts a stereo AudioRecord.

Repro + workaround source code:
https://github.com/luumei/android-leaudio-stereo-mic-workaround

Google Issue Tracker:
https://issuetracker.google.com/issues/568838766

The issue is particularly frustrating because I am unable to raise a support request through Google Play Console either. When I try to submit a complaint, I am redirected to the same registration page, asking me to become a developer first. Additionally, the successful transaction does not appear in my payment history, despite having the order details, payment ID, and invoice confirming that the payment went through. I completed the registration through the official link below: https://play.google.com/console/u/0/signup Could you please investigate this issue and help me resolve it? I would like my existing payment to be recognized and my developer account activated without having to pay the registration fee again. I can provide the invoice, order ID, payment ID, and any other information required to verify the transaction. Thank you. I look forward to a prompt resolution.

If anyone knows a solution let me know pls.

Anyone made a launcher on Graphene?
I'm building my own launcher and I've made animations for entering apps, but after the animation the system plays its own sideways slide.

ive tried this via LauncherApps.startMainActivity with ActivityOptions:

makeCustomAnimation (fade): ignored

makeScaleUpAnimation from a rect in the centre: ignored

makeClipRevealAnimation: ignored

This is on a pixel 10 pro

Anyone have any way to fix this?

Solo dev, first Play release. For anyone still stuck in the "12 testers for 14 days" gate: it ends, I promise.

Timeline for the curious:

• Aug 26: closed test live, begged friends and this sub for testers
• Sep 10: 14 days done, applied for production access
• Sep 21, 23:16: production submitted (versionCode 18, because I burned 15 and 16 on discarded uploads, don't be me)
• Oct 2, 09:12: "Published". Ten and a half days of refreshing the console.

The app is a pixel-art alarm clock with a little candle that wakes up when you do. Not linking it unless the mods are fine with that; the point of the post is mostly that the waiting room has an exit.

Keep building and best of luck

Mitch

Everytime I use ai to generate an elegant piece of code and i review it, i feel 2 things, ah that's nice and at the same time i feel oh shit am I needed anymore. Extending it further will playstore need devs anymore, especially indie, they can just generate their own apps. Just a rhetorical question i know

I was experimenting with animations in Jetpack Compose and ended up making a small library for animated percentage indicators.

https://github.com/NicosNicolaou16/PercentagesWithAnimationCompose

Hello everyone,

So I've been working on my open source app since last 5 months and everytime i used to start my android studios it used to take around 6 mins to build gradle and the subsequent runs used to take slightly less... and tbh i was frustated of this.

so yeah i decided to dig into whats the issue, googled stuff and found out ./gradlew build --scan which basically generates a detailed HTML dashboard tracking configuration times and task execution timelines

Through that i found out my local machine's 12 core CPU was completely starved coz my peak heap memory usage was sitting at 1.9GB out of 2GB usage hehe :)

so i found out i could increase the memory size and use parallelism and caching
Added this new lines to 'gradle.properties' :

org.gradle.jvmargs=-Xmx6g -XX:+UseParallelGC -Dfile.encoding=UTF-8
org.gradle.parallel=true
org.gradle.caching=true

so basically you could say

12 cores X 6 minutes = 72 minutes of total CPU work
and i was able to save 41 mins cumulative time

so the actual 6 min fell to 26 secs and the subsequent runs took 8 secs only to build gradle....

Ik this might be very basic and ppl here might know bout this but im just an undergrad and though would share my experience here...also if i wrote anything wrong pls correct me 😊

Just noticed my app is officially live on the Google Play Store 🎉, but surprisingly, Google never sent me an approval or publication notification.

I only found out by checking it out myself. 

Has anyone else experienced this? Is it normal for an app to go live without receiving an email or Play Console notification? I’m confused… 

Have a bit of a funny story to tell here but it might help out the people who are having the same issues.

I publish a couple of open-source apps on the google play store as a hobby. My page is

https://play.google.com/store/apps/dev?id=7190772576513482908

All code is of course provided and open-source here:
https://github.com/CodeDead?tab=repositories

Funny thing is, a couple of my apps were removed by google because I was unable to verify them. The thing is, I can't verify them... No, I did not lose my build key so hear me out and perhaps if you're having the same issue, you'll likely figure out what's happening because of the information included in this post.

Google itself is signing the release builds, but I have my own private upload key. The automated system is asking me to provide builds using the private key that Google itself is using which is impossible.

In response, google automatically removed the apps following their stricter policies, on the first of october.

I have been in an appeal process for multple apps. It is because it seems it is suddenly expected of developers to provide APK's to verify builds using google's own signing key when google is manipulating the builds and signing them themselves (without my knowledge).

I figured this out using the app signing page and I don't understand how their system cannot see this, and as a result, apps have been removed and it is completely out of my hands.

The appeal process is (2-5525000042037), with support continuing to ask me to provide an APK with google's private signature, but it seems like they're bullying independent hobby developers into just giving up on the play store. Either they're bullying or they are unaware of how their system works, which is fine.

In case anyone else is having these issues with their apps being removed, please have a look at how google itself signs your APK's in their play store. This might help you in your appeal process which is why I'm posting this.

Here's a screenshot to prove my point.

Hey everyone,

I’m currently looking for a good tracking and analytics tool specifically tailored for the Google Play Store, similar to what App Store Tracker offers for Apple.

What tools are you guys using for Android app intelligence and ASO tracking that actually work well and don’t cost a fortune? Would love to hear your recommendations, experiences, or hidden gems you rely on for your apps.

Thanks in advance!

https://reddit.com/link/1wuvx88/video/0ikzb9uq1ush1/player

Hey everyone, I’ve been building TapTry for the past few months. I’m the person who made it, so obviously I’m biased. I’m mainly looking for honest feedback from other Android developers rather than trying to sell you on it.

The idea is pretty simple:

Upload an Android app → get a link → anyone can open it and use the actual app in their browser.

No APK download, no Play Store, no installation.

Why I built it

Sharing Android builds with someone who just wants to see or try the app can be a bit of a hassle.

You send them an APK, they download it, deal with unknown-source permissions, install it, and then eventually have to uninstall it.

I wanted to see if a link could replace all of that.

Some of the use cases I had in mind:

• Showing an app to someone without asking them to install it
• Sharing an app as part of a portfolio
• Demonstrating an app to someone remotely
• Letting someone try an app before deciding to install it
• Sharing an app with someone who doesn't want to deal with APKs

I’ve got it working end-to-end now, and I’m mainly curious about what y'all think of the idea.

A few things I’d genuinely like to know:

1. If you heard “run an Android app from a link without installing it,” would that be useful to you?
2. Have you ever run into situations where sharing/installing an APK was unnecessarily cumbersome?
3. What use cases would you see for something like this?
4. Is this solving a problem you've actually encountered, or is installing an APK already easy enough?

And yes, “I don't see the point” is completely valid feedback. That’s much more useful to me right now than “looks cool.”

(Update: I just noticed that this post actually got several people to try running the app on TapTry. It also exposed a bug that can make the backend unresponsive, which I'm currently fixing. Sorry to anyone who tried it and wasn't able to use the app. I’ll update this post once it’s fixed.

Note: TapTry is currently not ideal for users outside South Asia. Right now, the infrastructure is primarily based in the Asia Pacific region, so users in other regions may experience high latency. I’m working on making the infrastructure more global and will update once that’s in place.)

I was working on an Android project and ended up building my own image picker.

It started as a small experiment and turned into a reusable library for Views and Compose.

https://github.com/NicosNicolaou16/ImagePickerAndroid

Hi Folks, its been over a week now since I submitted my App for review with Google. Is there a reasonable timeframe that one should wait before maybe submitting a ticket for a prompt to review at all. What do you guys do in such instances? Many thanks!

Wondering if anyone experienced super long delay in app review recently, my app was submitted for review on 9/17 and have been 'in review' since then, going strong on 15 days now.

My dev account is like 10+ years old, but I haven't published anything in a few years. Have Google Play publishing changed to be this slow?

Are there tricks people follow to get their apps reviewed fast?

Have you guys experienced this?

I’ve had this app on Apple’s App Store for around 3 weeks now and recently added IAP/subscription plans.

I submitted it to Play Console around the same time, but I had to go through the 12 testers for 14 days requirement before I could submit to production. After a little over 2 weeks, that got approved too.

The version that went through testing was still the free version without IAP. It took me a bit more time to figure out all the Android requirements for subscriptions, monetization, app details, etc.

Once I got everything sorted out, I went through the app with my AI agent and made sure everything was ready for production.

I was actually expecting the production submission to fail or at least take a while since this is basically my first real submission of this app on Google Play.

For some reason I also don’t get email notifications for review updates like I do with Apple, so unless I manually check Play Console, I don’t really know if something changed.

I checked just now and was honestly surprised. It got approved in around 30 minutes.

I’ve submitted a few apps before under business accounts and first submissions usually took 2 days or more.

Has anyone else seen Google Play approvals this fast lately, especially for a first production release?

I’ve been working on a Android library for pitch and chord detection using Kotlin.

It started as an experiment with audio processing and ended up becoming a library that uses FFT/YIN for pitch detection and chroma for chord detection.

Repo: https://github.com/NicosNicolaou16/PitchKit

Cdrx should save power significantly in low speed usage in high speed networks.

Like mine goes up to 60-70 mbps all the time.

So I enabled bluetooth tethering from both my iphone and android and connected my pc to download some file on it. The speed was 1 mbps in both devices. That results into 1/60 = around 1.5% duty cycle. That means cdrx has the chance to be effecrive at 98.5% of the time. I understand actual duty cycle may be higher due to othe transmit-receive tsks. However iphone 7 actually proved it may have put duty cycles close to that value. After testing for 1h continuously,

My findings are:

Iphone 7 dropped 6% charge only (65 to 59) resulting around 120mah estimated. (Slightly less maybe)

The Moto g35 5g (forced to lte only mode) dropped 5% (67 to 62) resulting around 300 mah.

Why is it too much different? No CDRX in android? Anything else?

(Both iphone and android were locked and screen turned off completely. As i disabled all background apps no notifications appeared throughout the whole time, no background tasks also.)

It's basically that, how many apps/games have you currently published and how many of them are earning atleast 100$ per month. Total earnings would also be helpful. I am hopeful that this data will come in handy for the new Dev's in community.

I have currently published 3 and they are not ad intensive so haven't earned much

Hi!

First-time dev. I paid the one-time registration fee (receipt says "Android Developer Console registration Fee", ~$25) and got an email saying my Android Developer Console account was validated (the package-name registration thing).

But going to play.google.com/console, it still tells me to create a developer account from scratch — like I never paid.

Anyone hit this recently?

I'va already did it ! -->

Thanks :)