Droidcon 2023: The time a new badge saw the light of the day, full with delight and android programming capabilities.
Go to ZeOffizialWebSeite If you have a compatiable browser (chrome, edge), great. If not, not so great.
You will see a website with a badge and several text boxes. Please put words and numbers into the boxes and check what happens. Once you are content with the results, attach ZeBadge, press the "sent to badge"-button and observe the magic of a flashing light. After a few seconds the new image is flashed and you can show it off.
This magic happens through WebSerial, a ktor backend, the dithering algorithm from Kotlin and some custom crafted js frontend. Fjoi.
Build server and pack into one archived jar
./gradlew server:fatJar
copy jar to server
scp zeapp/server/build/libs/server-1.0-SNAPSHOT-standalone.jar myamazingserver:
log into server
ssh myamazingserver
execute jar (jolo)
sudo java -jar *jar 80
The last step started the remote webserver on port 80, with root rights. 🤓
Ponder docker, k8n, virtualization and more fancy devops things, and then give up thinking you are a mobile dev ops. Unless you are, then youre help is needed.
- (Coming soon, see #58) Firebase App Distribution
- GitHub Release Page
This is the badge:
And this is the Android app:
TBD
Together they make magic happen. 🪄🦄
- Fork the repo & make write your code
- Use "droidcon/${name}" format for the branch name so we can find it.
- When done, open a PR and come to the booth to get you badge.
The following sections are describing the badge in detail, but if you just want to get started, please feel free to follow our Getting Started guide.
The following lines are the thought experiment on how we imagine a visit to the GDG Berlin Android Droidcon 2023 Berlin booth will look like. Alice is an atenndee and Olivia is an organizer.
| Actor | Dialog |
|---|---|
| Alice | Hey, I saw that thing everyone is running around, that with their name on it? They said I can find it here, is that true? |
| Olivia | Yes, you came to the right place, this is ZeBadge, a digital badge that displays your name and can be programmed and changed! |
| Alice | Oh that is amazing, how does this work? How can I get one? |
| Olivia | You need to do what we all love to do: Write some code and create a PR on our open source repository, controlling the badge and the android app. You can get started with using one of our loaner badges, and read one of our getting started guides. Once you have done "something code" with it, you can get your own badge. |
| Alice | Oh, neat, that is this qr code to get started points to one of the printed out sheets? |
| Olivia | Indeed, take loaner number four and happy hacking! Feel free to reach out when we can do something for you. |
| Alice went over to the loaners, played for 20 minutes with the badge, and was able to follow the getting started guide and create a new page system, showing the weather on page 2. She pushed a PR. |
The following diagram shows which parts are involved in this badge:
sequenceDiagram
Alice -->> App: Start
App --> App: Load last configuration
App -->> Alice: Show Bitmaps for A, B, C, U(p), D(down)
App -->> Badge: Connected?
Badge -->> App: Yes!
Alice -->> App: Tab on `update name on badge` button
App -->> Alice: What is your `name` and your contact info?
Alice --> App: `Alice Alicia` and `alice@berlindrioid.de`
App --> App: Layout view with provided info
App --> App: Save view to bitmap
App --> App: Convert bitmap to black and white format understood by badge
App -->> Badge: New `name` page set
Badge --> Badge: Save page
Badge --> Badge: Show page `a` (name)
Alice -->> Badge: Button 'b'
Badge --> Badge: Show sponsor 1 page
Alice -->> Badge: Button 'c'
Badge --> Badge: Show sponsor 2 page
Alice -->> Badge: Button 'up'
Badge --> Badge: Show user page `u`
Alice -->> Badge: Button 'down'
Badge --> Badge: Show user page `d`
