How does Android 8.1 retrieve the battery level of a headset? - bluetooth

Android 8.1 can show the battery level of a connected headset in the status bar.
How does Android actually do this?
Does it use the AT+IPHONEACCEV command over HFP? Or does it use BLE's battery service if available?
Thank you.

Android listens to the vendor specific command
"AT+IPHONEACCEV=1, ...."
.

Related

How to Connect Old Versions of Android Device to Android Studio (Bumblebee)

The Android Studio version of Bumblebee seems only to support the Android 11+ versions to connect devices through Wi-Fi wirelessly and pare devices through paring code.
But I currently only have a Samsung Galaxy Note4, which is the version of Android 6.0.1.
How can I connect to Android Studio and run Android Apps on my Note4? Please provide some learning resources or support, thanks a lot !!
On the top right corner of Android Studio, you see this toggle list, and click on "Troubleshoot Device Connections".
Find "Troubleshoot Device Connection" on the top right corner toggle list
After that, follow the given steps to "Rescan Devices", and "Enable USB Debugging". Then you'll see your device appears in the toggle list. If not, press "Restart ADB(Android Debug Bridge) server" to find your device.
Steps provided by Troubleshoot Device Connection
Finally, press Finish to complete the task.
All in all, when I tried to find out how can I connect my old old version of the Android device to the AS, I got nothing on the internet. So I asked this question here, but eventually, I fix it on my own.
So I hope this question helps.

Android studio do not show devices for flutter

I am new to Flutter and android studio, I followed the instructions of flutter.io , I created a blank app, and while I try to run I am unable to see the device lists. but it is available in device manager
Please see the screenshot.
Go to Tools->Troubleshoot Device Connections.
Connect your device over USB
If your device name does not show here then your USB or device has a problem.
You have to enable USB Debugging on your device.
Restart ADB Server.
I hope this addresses your issue.
You've not run your device....
Under Actions Click the Run button......
The emulator will start and your problem solved..

Connecting Device on IDE

Good day everyone, I am developing an android application in Android Studio. I want to connect my android phone and use it instead of an emulator(consume 1gb+ ram) and makes my PC so slow.
Now, the android studio can not detect my device ( I tried searching for troubleshooting but I am stuck). My phone is ASUS Zenfone GO Z00VD (ZC500TG) Lollipop version. Then I tried to connect another android phone (Jellybean version) and it is detecting.
Is it because my adb is outdated? Thank you for answers, suggestions, etc. in advance.
EDIT : Developer mode: Enabled , Debugging: Enabled
My phone Asus can be detected on another PC so I think the PC is the problem.
You need to enable developer mode on your device
http://blog.syncios.com/enable-developer-optionsusb-debugging-mode-on-devices-with-android-4-2-jelly-bean/

Android Studio does not detect my Moto G

I've connected my phone in the Camera mode, I have installed the latest motorola drivers from https://motorola-global-portal.custhelp.com/app/answers/detail/a_id/88481/action/auth. And I've also installed the avd from
http://forum.xda-developers.com/showthread.php?t=2588979
My device is just not showing up in the available devices when I try testing my app. Please help.
Enable USB debugging on the device (Developer options).
I've followed this link https://www.youtube.com/watch?v=Qb2olFyoMV4 and it worked well with my Moto G 2nd Generation.
When I try to see the logs from my device on Android Monitor, I had to unlock my device and there was a message asking if it was ok to debug from this computer.
Allow USB Debug message
Hope it works for you too.

android studio not found device

My device is ASUS K00z.
I connect it's to my PC for develop android app but in android studio not found device.
I set debugging mode to on.
In device manager show yellow exclamation of "Android" under "Other devices" root.
How to solve it's
PS. I use win7 64-bit
Try downloading the drivers from ASUS. I didn't find any 'k00z' on there, but it sounds like it may be the Fonepad 7 - they'll likely have different model numbers, so you'll need to know the specifics of your device and download the appropriate driver.

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