`Day47` - Reading time - RxAndroidBLE - Coding tim...

# 100daysofkotlin-2021

[JungIn Choi]

Day47
• Reading time - RxAndroidBLE
• Coding time - Lock (Sammi lock) controlling app demo
BLEManager.kt - create rxble client , device discovery using scan filter with key
Self-Comment
• First challengd - location permission thing.
◦ I definitely added the location permission in manifest, but it just didn’t work . Some error about location permission was being printed on logs. I just had to copy the location permission requesting method from Map demo app, and called that from onCreate, and it worked.
• Second challengd - was with Rx….. and I just had to follow the company code snippet to fix my wrong code.
◦ I posted both working & not working code on this thread. And.. I’ll have to figure why not-working-code did not work.
• Ugh…….I did not 100% understand the operation related with BLE. I’ll have to check the flow more thoroughly tomorrow.
• Third challengd - is something with toast. As in the video I posted on this thread’s comment, I made the button text change, according to the Behavior Subject’s value. However I just can’t pop up the toast..? Hmmm
Goals-Tomorrow
• review controller flow - analyze it in notion.
• resolve issues with toast
• move on to Lock(PlusLock) controlling app demo.

[JungIn Choi]

하하

iOS 이미지.MOV

[JungIn Choi]

(memo)
NOT-WORKING-CODE

connection!!.setupNotification(this.BICYCLE_CHARACTERISTIC)
                            .take(1)
                            .singleOrError()
                            .flatMap {observable ->
                                observable.take(1)
                                        .singleOrError()
                                        .zipWith(
                                                connection!!.writeCharacteristic(
                                                        BICYCLE_CHARACTERISTIC,
                                                        BICYCLE_COMMAND_PASSWORD
                                                )
                                        )
                            }

WORKING-CODE

connection!!.setupNotification(this.BICYCLE_CHARACTERISTIC)
                        .flatMap { it }
                        .take(1)
                        .singleOrError()
                        .zipWith(
                            connection!!.writeCharacteristic(
                                    BICYCLE_CHARACTERISTIC,
                                    BICYCLE_COMMAND_PASSWORD
                            )
                        )

why..?