can not find BLE device under Android 6.0

RE: can not find BLE device under Android 6.0

shalongbasi1 — Wed, 24 Aug 2016 23:18:50 GMT

Thanks for helping me tested on your Android 6.0. After the research, I found I missed the step "sync gradle" after changing the target SDK version. Now the program works on my MotoG android 6.0 too. :D. thanks for help again.

RE: can not find BLE device under Android 6.0

Hung Bui — Wed, 24 Aug 2016 10:18:15 GMT

@shalong: I assume you were testing with other app ? With the app you provided in the zip file it worked fine after the modification (target SDK v18) on my S6 Android 6.0.1

RE: can not find BLE device under Android 6.0

shalongbasi1 — Tue, 23 Aug 2016 22:59:29 GMT

thanks, I tried to change target to 18, but then it causes lots of GUI stuff cannot to be compiled. I will try to see what I can do with the permission.

RE: can not find BLE device under Android 6.0

Aleksander Nowakowski — Tue, 23 Aug 2016 12:33:39 GMT

Despite adding FINE_LOCATION or COARSE_LOCATION permission to the manifest you need to implement requesting them in the app and handing situation when user did not grant it. It's explained in the second link.

RE: can not find BLE device under Android 6.0

Hung Bui — Tue, 23 Aug 2016 11:52:55 GMT

Hi Shalong,

According to this and this, if you target at SDK 23 or higher, you would need to request permission if the app needed. And as in the link, the permission to do BLE scanning is location.

So the solution is either change your SDK target in the build.gradle to lower than 23 (in NRF UART v2.0 it's 18) or you need to add location permission in your app (in the ..manifest.xml)