1. Dependincy Injection 2. Testing 3. Modular Design 4. Avoiding In-Memory Global State 5. Packge Structure Consistency

That feeling when you said you should avoid global state and 10 seconds ago you showed that you had a private mutable var connectedNode that had a race with other coroutines.

@PhilippLackner

24 күн бұрын

Global state is not dangerous if it's automatically re-assigned after process death which is the case for this connected node. If the process dies and is then recreated, we'll have to re-establish the connection anyways. I've also explained that in the course. Not sure which race condition you mean there regarding connectedNode.

@Nek_12

24 күн бұрын

​@@PhilippLackner The wear messaging class sends messages using connectedNodeId which it will overwrite when you call connectToNode multiple times, causing messages to be sent to the wrong node. The design was supposed to observe and map the current node to a connection flow to prevent multiple clients from using it simultaneously. Your point about the local state is valid, the issue is how you manage it...

Amazing like always, ty ❤

Hi philip, could you show how to make one feature? it showed in 3D the real position of the phone in space, not only rotation, but in full from height to tilt, please, I am subscribed to you

Philip, very nice video. Quick question, does it make sense to have a folder/package with only one file inside? for example, the mappers folder has only one file "DeviceNodeMapper".

Thanks!

Global state is dangerous, I had to rewrite my code to use local preference instead. Because process death caused app crash. I was tempted to use savedInstanceState to update global state, but I just decided in the end local preference aproach.

@jinde5566

21 күн бұрын

I was using DataStore and combine with workflow that need Global state in UseCases

In case you need global state for contacts Would you use state flow like in your example, or save that into room/datastore?

hi Philip, I recently saw a program like crypto steps there to sell sneakers and pay for steps there they asked me for money to start and I deleted it now I can’t find a similar application, could you show me how to make one feature from there? it showed in 3D the real position of the phone in space, not only rotation, but in full from height to tilt, please, I am subscribed to you

Just read job offers and learn that . Testing , solid principle , kotlin , jet pack compose and so on.

One Question though about "Consistent Package Structure" -- As we have structured packages based on features, then my question is, if my "admin_override" feature has a couple of very small features that open up different screens as follows: 1. setting "printers" config through a screen, 2. showing "system_logs" through a screen, 3. "admin_override" screen itself for setting a couple of values/settings for the app to use; then inside "admin_override" package, should I create sub-packages called "system_logs" & "printers" which will further contain the usual "data", "domain", "presentation", "di" packages; as well as "data", "domain", "presentation", "di" packages in "admin_override" package as well ??? admin_override |__data |__domain |__presentation |__di |__system_logs |__data |__domain |__presentation |__di |__printers |__data |__domain |__presentation |__di 👆 For Consistency ??

@PhilippLackner

22 күн бұрын

That quickly results in package hell :D Don't make it more complex than it needs to be. If you feel like system logs and printers are part of the admin override feature, include them in the corresponding layer packages

Phillip, do you know Timo Boll?

@PhilippLackner

24 күн бұрын

Legend

What if the globol state should not persist only live until the app closes?

@kivan26

22 күн бұрын

All the data should be accessed the same way, trough repositories. It is a repository implementation detail whether the data is stored in DB, file, rest api, shared prefs, or even in memory...

Hey philipp or anybody know. In Android essential bundle course. I need some clarification which is lifetime access and which is limited time access?

@PhilippLackner

22 күн бұрын

@@sureshsivalingam01 they're all lifetime access

@sureshsivalingam01

15 күн бұрын

Thank u

Guten tag

Ich bin ein Berliner

Third