Android Question Wear OS Tutorial for B4A 8.50

alwaysbusy · Sep 22, 2018

EDIT: Turned out a tutorial wasn't needed, but DonManfred gave me all the clues needed to continue with the project myself. Got him a couple of beers...

I've been searching to find a way to make a Wear OS app + mobile app for the best part of a week now, but don't seem to find a way to get it working. I've got some pointers from Erel, but it is not easy to puzzle all snippets together to one complete 'tutorial'. Some stuff said in some post may have worked at a certain time, but don't work anymore now.

I admit it has been a couple of years since I've used B4A (I'm fully invested in B4J) and there seems to have changed quite a lot in how stuff works in B4A now. I'm familiar with creating java libraries for B4A but e.g. the whole .aar thing has been very confusing for me.

The closest I got, was trying to use the 'Wearable Datalayer' library from @barx https://www.b4x.com/android/forum/threads/wearable-datalayer.49968/ (he gracefully released the source code of his library and a couple of examples and I went trough his source codes).

However, when I load his library, I get this strange error:

I can already give you a million thanks in advance!

Alwaysbusy

DonManfred · Sep 22, 2018

alwaysbusy said:
https://www.b4x.com/android/forum/threads/wearable-datalayer-beta.44859/

Unfortunately this is a 4 years old Thread and i´m pretty sure Google has changed the Api in the Meantime. Mean; the Lib needs an Update too. Or maybe rewritten on the new Googlerequirements.

You may ask @barx is he is willed to share his old sources.

Just my 2cent as i am not interested in the WEAR development at all ;-)

EditToAdd: I see. The 2nd Link is a link to the Source

DonManfred · Sep 22, 2018

Maybe installing this Component manually helps?

Note that i searched for collection.

Also try add a AdditionalJar line to your Code

B4X:

#AdditionalJar: com.android.support:collections

alwaysbusy · Sep 22, 2018

Yes, it goes to up 2016 or so, and B4A 8.50/SDK 27/Wear OS have evolved a lot since then. I noticed some people did make Wear Apps (Share My Creation) up to the end of 2017 so maybe one of them has cracked the secret

I may try to write a new lib myself (but no need to reinvent the water). However, how to include the google-play-services, gms, wearable stuff nowadays with the .aar files is a puzzle for me. I read the posts on that subject carrefully, but must be missing how it all comes together.

alwaysbusy · Sep 22, 2018

@DonManfred This looks like it could be it! Now the collections error is gone and a couple of more similar errors are coming up which I seem to be able to solve the same way. I'll report back when all these errors are gone. I thought the SDK manager had already downloaded all needed stuff, but I was wrong!

DonManfred · Sep 22, 2018

alwaysbusy said:
I thought the SDK manager had already downloaded all needed stuff, but I was wrong!

Seems that google released new Components for the SDK 28

alwaysbusy · Sep 22, 2018

it is getting close! Errors gone, just now in compiling the examples from barx something still may be missing:

B4X:

B4A Version: 8.50
Parsing code.    (0.00s)
Building folders structure.    (0.08s)
Compiling code.    (0.06s)
Compiling layouts code.    (0.01s)
Organizing libraries.    (0.00s)
Generating R file.    Error
ERROR: In <declare-styleable> FontFamilyFont, unable to find attribute android:fontVariationSettings
ERROR: In <declare-styleable> FontFamilyFont, unable to find attribute android:ttcIndex

Could be something in the manifest...

DonManfred · Sep 22, 2018

alwaysbusy said:
the examples from barx something still may be missing

I did fixed it compiling using an 28 sdk Android.jar

DonManfred · Sep 22, 2018

DonManfred said:
I did fixed it compiling using an 28 sdk Android.jar

Try to use

[AndroidSDK]\platforms\android-28\android.jar

in Tools-Configure Paths. Make sure to install SDK 28 first

alwaysbusy · Sep 22, 2018

Hmm, I don't have android-p, just android-28. And although this gets me again a step further, I think barx lib may need an update as the NodeListener is depreciated:

EDIT: Ah, android-p must have been a typo

B4X:

B4A Version: 8.50
Parsing code.    (0.00s)
Building folders structure.    (0.09s)
Compiling code.    (0.07s)
Compiling layouts code.    (0.01s)
Organizing libraries.    (2.47s)
Generating R file.    (1.07s)
Compiling debugger engine code.    (1.07s)
Compiling generated Java code.    Error
B4A line: 53
DL.Initialize(\
javac 1.8.0_73
src\barxdroid\wearable_app\main.java:423: error: cannot access NodeListener
mostCurrent._dl.Initialize(processBA,"DL");
               ^
  class file for com.google.android.gms.wearable.NodeApi$NodeListener not found

You don't get any compile errors anymore at all?

DonManfred · Sep 22, 2018

alwaysbusy said:
You don't get any compile errors anymore at all?

No. But i was not using any Datalayer. I just added

B4X:

#AdditionalJar: com.android.support:collections

to my active Project i am working on and tried to solved the missing Mavens. Using Android 28 SDK i was able to compile.

alwaysbusy said:
class file for com.google.android.gms.wearable.NodeApi$NodeListener not found

alwaysbusy said:
I think barx lib may need an update as the NodeListener is depreciated

Looks like you are right.

public interface NodeApi
This interface was deprecated.
Use NodeClient.

Google Docs

jimmyF · Sep 22, 2018

I had the same issue.
You need to search in the sdk manager for the
"Android SDK Platform 28 (Android 28) version: 6"
It does not get installed automatically.
Then you will have the android.jar version-28

alwaysbusy · Sep 22, 2018

DonManfred said:
Looks like you are right.

public interface NodeApi
This interface was deprecated.
Use NodeClient.

This looks like something i could do, maybe even updating it to the latest google guidelines: https://developer.android.com/training/wearables/data-layer/migrate-to-googleapi#java

Thanks a lot for your help! I'm getting the hang back with working with B4A. If I succeed, I'll upload a newer version of the lib and a couple of beers will be on your way

DonManfred · Sep 22, 2018

alwaysbusy said:
This looks like something i could do

Sounds great. I guess some people will appreciate it.

alwaysbusy said:
Thanks a lot for your help!

Was a pleasure to help!

DonManfred · Sep 26, 2018

alwaysbusy said:
and a couple of beers will be on your way

I don´t trink alcohol but thanks anyway; i´ll use your donation on my next Cinema-Day and buy me some Popcorn and a Coke Zero

THANK YOU! ;-)

Again: It was a pleasure to help.

At least it pointed out that we all need to switch to Android 28 Jar. In the meantime 28 and all the Components are added to the suggested Itemlist and users using the SDK Manager will get Api 28 per default now.

alwaysbusy · Sep 26, 2018

DonManfred said:
Cinema-Day

As long as the movie is good, I have no problem with that

DonManfred said:
we all need to switch to Android 28 Jar

Yes, I've forwarded a project to Erel too with exposed another 'potential' change Android 28 created (in view of making B4A libraries).

alwaysbusy · Sep 30, 2018

I give up after more of a week struggling to make this lib. As this is just for a personal project, I'm going to write it in Android Studio. But still, thanks for all the help!

EDIT: I've got a pointer from Erel which may be able for me to continue (#Extends, of which I was unaware this was possible)

Android Question Wear OS Tutorial for B4A 8.50

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