Describe the problem

In the last paragraph where this text written:

8. Change the span count to 5 and the direction to GridLayoutManager.VERTICAL.

The VERTICAL in the text is a mistake, it must be HORIZONTAL like as the written text and code after it.

In which lesson and step of the codelab can this issue be found?
Lesson 7.3 + task 4 + step 2.

How to reproduce?
Instead of incorrect VERTICAL it must be HORIZONTAL like as following:

8. Change the span count to 5 and the direction to GridLayoutManager.HORIZONTAL

codelab: android-kotlin-fundamentals

Because the Fragment lifecycle is longer than the view lifecycle. When back from the back stack, the Fragment view will be leaked.
https://github.com/google-developer-training/android-kotlin-fundamentals-apps/blob/master/GuessTheWordLiveData/app/src/main/java/com/example/android/guesstheword/screens/game/GameFragment.kt#L57

Describe the problem
A clear and concise description of what the problem is.
There is simple typo in the description.

In which lesson and step of the codelab can this issue be found?
Lesson number + step number.
Android Kotlin Fundamentals 01.1: Get started
step 2

How to reproduce?
What are the exact steps to reproduce the problem?

change line "The com.example.hello.helloworld (or the domain name you have specified) folder contains all the files for an app package."
to
"The com.example.android.helloworld (or the domain name you have specified) folder contains all the files for an app package.

com.example.hello.helloworld -> com.example.android.helloworld

Versions

1. What version of Android Studio are you using?
   3.5
2. What API level are you targeting?
   4.4 kitkat

Additional information
Add any other context about the problem here.

codelab: android-kotlin-fundamentals

Describe the problem
'View attributes' section:

The android:layout_width and android:layout_height attributes indicate the weight and height of a view.

weight is width ??

In which lesson and step of the codelab can this issue be found?
Lesson number + step number.
Android Kotlin Fundamentals 01.2: Basic app anatomy
https://codelabs.developers.google.com/codelabs/kotlin-android-training-app-anatomy/#7

How to reproduce?
What are the exact steps to reproduce the problem?

Versions

1. What version of Android Studio are you using?
   3.5
2. What API level are you targeting?
   29

Additional information
Add any other context about the problem here.

codelab: android-kotlin-fundamentals

how can I increase the number of quiz a user can take before winning

Update to use Fragment property delegate to get ViewModel:
https://developer.android.com/reference/kotlin/androidx/fragment/app/package-summary#viewmodels

Describe the problem

Once Jetpack library is enabled and configured to add support for vector images, tools:src no longer shows the placeholder

In which lesson and step of the codelab can this issue be found?

Android Kotlin Fundamentals 01.3: Image resources and compatibility - Step 6

How to reproduce?

• Add a placeholder in a ImageView
• Configure Jetpack as mentioned
• Once added app:srcCompat="@drawable/empty_dice" in ImageView the placeholder disappear

Versions

1. What version of Android Studio are you using?

Android Studio 3.6.1
Build #AI-192.7142.36.36.6241897, built on February 26, 2020
Runtime version: 1.8.0_212-release-1586-b4-5784211 amd64
VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
Linux 5.3.0-40-generic
GC: ParNew, ConcurrentMarkSweep
Memory: 1981M
Cores: 8
Registry: ide.new.welcome.screen.force=true
Non-Bundled Plugins: 

2. What API level are you targeting? 29

Additional Information

codelab: android-kotlin-fundamentals

About
6. Task: Understand API levels and compatibility, Step3-4

Open the main_activity.xml layout file. Add this namespace to the root tag, underneath the tools namespace:

I think "main_activity.xml" is mistake, and is it "activity_main.xml" right?

Describe the problem
The codelab introduces observer pattern on task 7 but we've already used it in task 5.
This arrangement seems strange to me, maybe we could put it out a little bit earlier?

In which lesson and step of the codelab can this issue be found?
05.2 task 5 and task 7

codelab: android-kotlin-fundamentals

Describe the problem
await missing

In which lesson and step of the codelab can this issue be found?
Lesson 08.1.6 - Step 2.11

How to reproduce?

private fun getMarsRealEstateProperties() {
   coroutineScope.launch {
       var getPropertiesDeferred = 
          MarsApi.retrofitService.getProperties()
       try {          
           // This instruction is missing: var listResult = getPropertiesDeferred.await()
           _response.value = 
              "Success: ${listResult.size} Mars properties retrieved"
       } catch (e: Exception) {
           _response.value = "Failure: ${e.message}"
       }
   }
}

codelab: android-kotlin-fundamentals

Describe the problem
Adding the safe args dependency to the project gradle file using the following declaration stated in the document fails due to not finding the dependency:
classpath "android.arch.navigation:navigation-safe-args-gradle-plugin:$navigationVersion"
Instead, the following line works:
classpath "androidx.navigation:navigation-safe-args-gradle-plugin:$navigationVersion"

In which lesson and step of the codelab can this issue be found?
03-3 Step 2

How to reproduce?
Add classpath "android.arch.navigation:navigation-safe-args-gradle-plugin:$navigationVersion" to project gradle file

Versions
3.5
19

Additional information

codelab: android-kotlin-fundamentals

Describe the problem
A clear and concise description of what the problem is.
The code lab refers to "main_activity.xml" which for some reason is "activity_main.xml" in android Studio 3.6.1

In which lesson and step of the codelab can this issue be found?
Android Kotlin Fundamentals 01.3: Image resources and compatibility
Step 3: Add compatibility for vector drawables

How to reproduce?
What are the exact steps to reproduce the problem?

Versions

1. What version of Android Studio are you using? 3.6.1
2. What API level are you targeting?
   targetSdkVersion 28

Additional information
Add any other context about the problem here.

codelab: android-kotlin-fundamentals

In my application, the condition: if (playlist.value!!.IsEmpty()) causes a kotlin.KotlinNullPointerException.

class DevByteViewModel(application: Application) : AndroidViewModel(application) {
    
    ...
    
    val playlist = videosRepository.videos
    
    ...
    
    init {
        refreshDataFromRepository()
    }
    
    ...
    
     /**
     * Refresh data from the repository. Use a coroutine launch to run in a
     * background thread.
     */
    private fun refreshDataFromRepository() {
        viewModelScope.launch {
            try {
                videosRepository.refreshVideos()
                _eventNetworkError.value = false
                _isNetworkErrorShown.value = false

            } catch (networkError: IOException) {
                // Show a Toast error message and hide the progress bar.
                if(playlist.value!!.isEmpty())
                    _eventNetworkError.value = true
            }
        }
    }
}

The fact is,

1. Asynctask is running on another thread in background asynchronously
2. Livedata is working like floating over database to see the changes.

So it takes time to accomplish the fetch operation for Asyntask. I want to understand how to avoid it. Thanks.

Describe the problem
A clear and concise description of what the problem is.
Android Kotlin Fundamentals 04.2: Complex lifecycle situations

In which lesson and step of the codelab can this issue be found?
Lesson number + step number.
Step 2: Modify MainActivity
Remove the call to startTimer() in onStart() not
remove the call to startTimer() in onCreate()
end of issue
How to reproduce?
What are the exact steps to reproduce the problem?

Versions

1. What version of Android Studio are you using?
2. What API level are you targeting?

Additional information
Add any other context about the problem here.

codelab: android-kotlin-fundamentals

Describe the problem
The codelab asks the learner to open "res/values/dimens.xml", yet there is no dimens.xml file by default. A section on how to create the dimens.xml file would be useful.
In which lesson and step of the codelab can this issue be found?
02.3, Task 5, Step 2: Add a style.

How to reproduce?
No steps are required to reproduce.
Versions
I am using version 3.5.3, and targeting API 27.

Additional information
Add any other context about the problem here.

codelab: android-kotlin-fundamentals

Describe the problem
The position of the code highlight seems to be slightly different.

[Wrong]
findViewById<Button>(R.id.done_button) ⇒ binding.doneButton

[Correct]
findViewById<Button>(R.id.done_button) ⇒ binding.doneButton

In which lesson and step of the codelab can this issue be found?
Android Kotlin Fundamentals 02.4: Data-binding basics
6. Summary

Thank you.

Describe the problem
Wording mistake

In which lesson and step of the codelab can this issue be found?
Lesson : Android Kotlin Fundamentals 02.1: Linear layout using the Layout Editor
Step: 3. Task: Create the AboutMe Project

How to reproduce?
Always : At the end of this step, it is mentioned "Mainactivity.kt" or it must be "MainActivity.kt"

codelab: android-kotlin-fundamentals

Describe the problem
A clear and concise description of what the problem is.
Databinding is not working.
In which lesson and step of the codelab can this issue be found?
Lesson number + step number.
8.2 + 4

How to reproduce?
What are the exact steps to reproduce the problem?
Just changed FragmentOverviewBinding to GridItemBinding as mentioned in codelab na dgot this error. After multiple clean and build also not helping here

Versions

1. What version of Android Studio are you using?
   3.6
2. What API level are you targeting?
   28

Additional information
Add any other context about the problem here.

codelab: android-kotlin-fundamentals

Describe the problem
A clear and concise description of what the problem is spelling error.

In which lesson and step of the codelab can this issue be found?
Android Kotlin Fundamentals 01.3: Image resources and compatibility
Step 1. Welcome
First line under What you'll do.

How to reproduce?
https://codelabs.developers.google.com/codelabs/kotlin-android-training-images-compat/#0

Additional information
I believe it's dice instead of "die".

codelab: android-kotlin-fundamentals

similar to #29

Describe the problem
The ViewModelProviders is deprecated, use ViewModelProvider directly.

In which lesson and step of the codelab can this issue be found?

06.2 Task 4 and probably every paragraph after that

Additional information

Replace every occurrence of

val sleepTrackerViewModel =
       ViewModelProviders.of(
               this, viewModelFactory).get(SleepTrackerViewModel::class.java)

to

val sleepTrackerViewModel =
       ViewModelProvider(
               this, viewModelFactory).get(SleepTrackerViewModel::class.java)

codelab: android-kotlin-fundamentals

Maybe I missed something but starting from the Basic Activity template in studio 3.5.3 i do not find a Snackbar in the generated activity.

Describe the problem

The textview.xml that specified with a red rectangle, must be header.xml.

In which lesson and step of the codelab can this issue be found?
Lesson 07.5 + task 4 + step 2.

How to reproduce?
Change as the following: textview.xml => header.xml

codelab: android-kotlin-fundamentals

Describe the problem
I want to say a big thank you to you guys for the good job. My observation is a simple "Variable Omission", noticed in one of the codes (second to the last code in "Android Kotlin Fundamentals 08.1: Getting data from the internet" to be precise). Kindly find the screenshot attached.
Once again, I say: thank you!

In which lesson and step of the codelab can this issue be found?
https://codelabs.developers.google.com/codelabs/kotlin-android-training-internet-data/index.html?index=..%2F..android-kotlin-fundamentals#5

Describe the problem
The document which Transformations.map() linked to has been deprecated.
use anrdoid.x instead of android.arch package

In which lesson and step of the codelab can this issue be found?
05.4 task 5, first link

How to reproduce?
Just click the url

Additional information

Change the URL from https://developer.android.com/reference/android/arch/lifecycle/Transformations.html#map%28android.arch.lifecycle.LiveData%3CX%3E,%20android.arch.core.util.Function%3CX,%20Y%3E%29
to
https://developer.android.com/reference/androidx/lifecycle/Transformations.html#map(androidx.lifecycle.LiveData%3CX%3E,%20androidx.arch.core.util.Function%3CX,%20Y%3E)

codelab: android-kotlin-fundamentals

Describe the problem

The variable name of the sample code is wrong

fun onCorrect() {
   _score.value = (_score.value)?.plus(1)
   nextWord()
}

since we doesn't introduce the encapsulation of LiveData until the section 6 of 05.2, we should use score in stead of _score as its variable name.

So the correct function should look like this:

fun onCorrect() {
   score.value = (score.value)?.plus(1)
   nextWord()
}

In which lesson and step of the codelab can this issue be found?
05.2 +Step 2 (2. fun onCorrect)

Additional information
Add any other context about the problem here.

codelab: android-kotlin-fundamentals

Describe the problem
Is the phrase in 03.1.4 step 1 create a binding object point 2
correct, or should we
Change : To inflate the fragment's view, call the DataBindingUtil.inflate() method on the fragment's Binding object, which is FragmentTitleBinding.
To : To inflate the fragment's view, call the DataBindingUtil.inflate() method which returns a Binding object, which is a FragmentTitleBinding.

In which lesson and step of the codelab can this issue be found?
03.1.4 step 1

Additional information
unrelated side note: I found it confusing that in the starter lab we are creating a fragment with id gameOverFragment, but there is also an imageview in the fragment's xml file with the same id.

codelab: android-kotlin-fundamentals

Describe the problem

You missed the following line of code at the first line of try block as marked in the picture:

val listResult = getPropertiesDeferred.await()

In which lesson and step of the codelab can this issue be found?
Lesson 8.1 + task 6+ step 2.

How to reproduce?
Just add the following code to the first line of the try block:

val listResult = getPropertiesDeferred.await()

The complete getMarsRealEstateProperties() method now looks like this:

private fun getMarsRealEstateProperties() {
   coroutineScope.launch {
       var getPropertiesDeferred = 
          MarsApi.retrofitService.getProperties()
       try {          
           val listResult = getPropertiesDeferred.await()
           _response.value = "Success: ${listResult.size} Mars properties retrieved"
       } catch (e: Exception) {
           _response.value = "Failure: ${e.message}"
       }
   }
}

Additional information
Link: https://codelabs.developers.google.com/codelabs/kotlin-android-training-internet-data/#5

codelab: android-kotlin-fundamentals

Describe the problem
A clear and concise description of what the problem is.

1. wrong description

• Change the vertical bias of the yellow_button to 100, to drop down the buttons to the bottom of the layout.
  -> Change the vertical bias of the yellow_button to 1.0, to drop down the buttons to the bottom of the layout.

2. hard coding margin

<Button
   android:id="@+id/green_button"
   ...
   android:layout_marginEnd="16dp"
   ...
   app:layout_constraintStart_toEndOf="@+id/yellow_button" />

<Button
   android:id="@+id/green_button"
   ...
   android:layout_marginEnd="@dimen/margin_wide"
   ...
   app:layout_constraintStart_toEndOf="@+id/yellow_button" />

In which lesson and step of the codelab can this issue be found?
Lesson number + step number.
02.3: Constraint layout using the Layout Editor

How to reproduce?
What are the exact steps to reproduce the problem?

Versions

1. What version of Android Studio are you using?
2. What API level are you targeting?

Additional information
Add any other context about the problem here.

codelab: android-kotlin-fundamentals

Describe the problem
I needed to modify code in the instructions after pasting

In which lesson and step of the codelab can this issue be found?
04.1 step 6

How to reproduce?
use:
override fun onAttach(context: Context?) {
to correct change to:
override fun onAttach(context: Context) {

Versions

1. What version of Android Studio are you using? 3.6.1
2. What API level are you targeting? 29

codelab: android-kotlin-fundamentals

Describe the problem
A clear and concise description of what the problem is.

• Typo
  • 4 Task: Use data binding to display data
  • Step 4: Use the data class for the nickname in the TextView
  • 3. In ActivityMain
       -> 3. In MainActivity

In which lesson and step of the codelab can this issue be found?
Lesson number + step number.
02.4: Data-binding basics, 4, step 4

How to reproduce?
What are the exact steps to reproduce the problem?

Versions

1. What version of Android Studio are you using?
2. What API level are you targeting?

Additional information
Add any other context about the problem here.

codelab: android-kotlin-fundamentals

Update: how to get random number in Kotlin >= 1.3
val randomInt = (1..6).random()

CMIIW

After successfully built the project I tried to run it, but it looks like there's a bug. I think there's a problem with MoshiConverterFactory.

Describe the problem
ViewModelProviders.of is deprecated

In which lesson and step of the codelab can this issue be found?
Android Kotlin Fundamentals 05.1: ViewModel and ViewModelFactory Step 8

How to reproduce?
What are the exact steps to reproduce the problem?

Versions

1. What version of Android Studio are you using?
2. What API level are you targeting?

Additional information
Add any other context about the problem here.

codelab: android-kotlin-fundamentals

Describe the problem
A clear and concise description of what the problem is.
When trying to follow steps for generating ImageURI as mentioned in the line

val imgUri = imgUrl.toUri().buildUpon().scheme("https").build()

got error in toUri() method. Below is the error message

Cannot built bytecode embed to JVM 1.8 target

In which lesson and step of the codelab can this issue be found?
Lesson number + step number.
8.2 + 3

How to reproduce?
What are the exact steps to reproduce the problem?

Versions

1. What version of Android Studio are you using?
   Android Studio 3.6 and VM is OpenJDK 64 bit server
2. What API level are you targeting?
   28

Additional information
Add any other context about the problem here.

codelab: android-kotlin-fundamentals

Describe the problem
Wrong description of target folder when declaring a new kotlin file MyName.kt.

In which lesson and step of the codelab can this issue be found?
02.4: Data-binding basics - 4. Task: Use data binding to display data - Step 1: Create the MyName data class

How to reproduce?

Versions

1. 3.5.3
2. 23

Additional information
No

codelab: android-kotlin-fundamentals

Describe the problem
A clear and concise description of what the problem is.
Inside getMarsRealEstateProperties() method, the following line is missing in the try block
var listResult = getPropertiesDeferred.await()

In which lesson and step of the codelab can this issue be found?
Lesson number + step number.
Android Kotlin Fundamentals 08.1: Getting data from the internet + 6

How to reproduce?
What are the exact steps to reproduce the problem?

Versions

1. What version of Android Studio are you using?
2. What API level are you targeting?

Additional information
Add any other context about the problem here.

codelab: android-kotlin-fundamentals

Describe the problem

When you define companion object and the from() method, you must change the primary constructor's accessibility level to private.

In which lesson and step of the codelab can this issue be found?
Lesson 07.5, task 4, step 2

How to reproduce?
The TextViewHolder class definition must be as following:

class TextViewHolder private constructor(view: View): RecyclerView.ViewHolder(view) {
          // Your code
}

codelab: android-kotlin-fundamentals

Describe the problem
According to the latest view model version, should be using ViewModelProvider()

In which lesson and step of the codelab can this issue be found?
Android Kotlin Fundamentals 05.1: ViewModel and ViewModelFactory, Step 5

How to reproduce?
Change ViewModelProviders.of() to ViewModelProvider() with the latest view model version

Versions

1. What version of Android Studio are you using? 3.5
2. What API level are you targeting? 29

Additional information
Nice course by google, anyway, I very enjoy playing this codelab

codelab: android-kotlin-fundamentals

We take all the data in the database but Dispatchers are not used.

The condition in the onCorrect method prevents final score increment in case of full play through.

Describe the problem
Type mismatch: inferred type is Int but Drawable! was expected

In which lesson and step of the codelab can this issue be found?
lesson 01.3 : step 5

How to reproduce?
Just following the steps.

Versions

1. Android Studio 3.5.3
2. API 28

Additional information
Solution: using diceImage.setImageDrawable(resources.getDrawable(drawableResource, applicationContext.theme))

codelab: android-kotlin-fundamentals

In function makeColored (in MainActivity.kt) the variables box_three_text, box_four_text, and box_five_text are undefined. This is not a problem in AS 3.6 with view binding, but in AS 3.5.1 (the latest stable release) this gives a compile-time error.

Describe the problem
Screenshot says "Vertial" instead of "Vertical"

In which lesson and step of the codelab can this issue be found?
https://codelabs.developers.google.com/codelabs/kotlin-android-training-linear-layout/index.html#3

codelab: android-kotlin-fundamentals

Describe the problem
In the final implementation of the getMarsRealEstateProperties() , the one that show the final version:
This one:
private fun getMarsRealEstateProperties() {
coroutineScope.launch {
var getPropertiesDeferred =
MarsApi.retrofitService.getProperties()
try {
_response.value =
"Success: ${listResult.size} Mars properties retrieved"
} catch (e: Exception) {
_response.value = "Failure: ${e.message}"
}
}
}

You forget to add the listResults value , like this
private fun getMarsRealEstateProperties() {
coroutineScope.launch {
var getPropertiesDefered = MarsApi.retrofitService.getProperties()
try {
// This is not added to the example code
var listResults = getPropertiesDefered.await()
_response.value = "Success: ${listResults.size} Mars properties retrieved"
} catch (e: Exception){
_response.value = "Failure: ${e.message}"
}
}
}

In which lesson and step of the codelab can this issue be found?
https://codelabs.developers.google.com/codelabs/kotlin-android-training-internet-data/#5

Describe the problem
Running the project DevBytesWorkManager does not execute RefreshDataWorker class
Log: I/WM-WorkerWrapper: Worker result SUCCESS for Work [...] is not displayed

In which lesson and step of the codelab can this issue be found?
09.2: WorkManager

How to reproduce?
Run the project and check the logcat for the message : I/WM-WorkerWrapper: Worker result SUCCESS for Work [...] which will not be found

Versions

1. Android Studio 3.5.3
2. Tried with API level 28 & 28

Additional information
I tried both Workmanager version 1.0.1as per codelab and latest 2.3.2 its not working

codelab: android-kotlin-fundamentals

Proposed changes

• task 4, Step 5 second bullet:

from: The setOnClickHandler() method, which connects the Button to the handler method.
to; The setOnClickListener() method, which connects the Button
to the handler method.

• task 5, step 2, end of first paragraph

from: The task of generating a random number isn't Android-specific, and you use the Random class to do it.
to; The task of generating a random number isn't Android-specific, and you use the random() function on the range to do it.

Thanks a lot for the great course!
Hope this is the correct location to provide feedback (the course does not give a pointer to an appropriate feedback location)
Keep up the good work!

Describe the problem
The code used to initialise the ViewModel is depreciated.
viewModel = ViewModelProviders.of(this).get(GameViewModel::class.java)

In which lesson and step of the codelab can this issue be found?
Android Kotlin Fundamentals 05.1: ViewModel and ViewModelFactory

This code seems to work
viewModel = ViewModelProvider(this).get(GameViewModel::class.java)

Refer to StackOverflow:
https://stackoverflow.com/questions/53903762/viewmodelproviders-is-deprecated-in-1-1-0

How to reproduce?

Enter the code into Android Studio

Versions

1. What version of Android Studio are you using? 3.5.3
2. What API level are you targeting?
   Min: 19
   Max: 28

Additional information
Add any other context about the problem here.

codelab: android-kotlin-fundamentals

There is a typo in an end-of-section questionnaire as shown below:

"What else do you need to do so that when the user taps the Show headlines button, the app navigates to the ShowHeadlinesFragment?"

It should have been HeadlinesFragment instead of ShowHeadlinesFragment

The issue can be found at:
Lesson number: 03.2 + Step number: 14 + Question: 6