Bluetooth Le Can't Find Any Device On Android 6.0

I am building an app that receives data from bluetooth device and is fully functional on a 4.4.4 android smartphone. But when I try it on version 6.0 devices it does not find the

Solution 1:

Yes you have to ask and be granted those permissions or else nothing will show up under runtime. But what i can see is that you are missing some dependencies on AppCompat

Add this to your build.gradle file

implementation  com.android.support:appcompat-v7:28.0.0

And also don't use implicit version number this will/can cause unpredicted errors because it can upgrade whenever without you knowing and introducing a nasty bug. Set it always with a explicit number 'com.android.support:support-v4:28.0'

Solution 2:

this sounds like you forgot to ask actively for the permission by an dialog: https://developer.radiusnetworks.com/2015/09/29/is-your-beacon-app-ready-for-android-6.html

Original idea found here: Bluetooth Low Energy startScan on Android 6.0 does not find devices

Greets