AdamMc331

// This is from Android's RecyclerView.Java file

/**
 * Note: this Runnable is only ever posted if:
 * 1) We've been through first layout
 * 2) We know we have a fixed size (mHasFixedSize)
 * 3) We're attached
 */
final Runnable mUpdateChildViewsRunnable = new Runnable() {
    @Override

AdamMc331

sealed class PokemonListState {
    object Loading : PokemonListState()
    object Empty : PokemonListState()
    class Loaded(val data: List<Pokemon>) : PokemonListState()
    class Error(val error: Throwable?) : PokemonListState()
}

AdamMc331

enum class DayEnum(
    val index: Int,
    val dayName: String
) {
    SUNDAY(
    index = 0,
    dayName = "Sunday"
),
    MONDAY(
    index = 1,

AdamMc331

git rm -r —cached .idea? - Harry Grillo

What is this folder?

Comes from the IDE Intellij, which AS is forked from and that’s why we have it.

Projects are directory based, which is what the .idea/ folder is for.

The gitignore file is often kind of spotty about what’s ignored and what isn’t. But now there’s a fixed set of lines (that are also what the presenter recommends).

libraries/

Meta data around libraries in the project. We don’t want to include this because dependency management tools are what’s responsible for setting this up (like gradle).

AdamMc331

class HumanTimeHelper(private val clock: IClock = SystemClock()) {
  // This allows me to update my helper class, _without_ changing the call site!
}

AdamMc331

class QuestionViewModel {
	private val state = MutableLiveData<QuestionState>()

	private val currentQuestion: LiveData<Question> = Transformations.map(state) {
		(it as? QuestionState.Loaded)?.data
	}

	val questionTitle: String
		get() = currentQuestion.value?.title.orEmpty
}

AdamMc331

// In Java, I can do this
public class MainClass {
  interface MyInterface {
    public void printName();
  }
}

public class SubClass extends MainClass {
}

AdamMc331

// Create a custom error class that holds both the error that occured,
// and a function to invoke if it retries. 
data class MyCustomError(
    val error: Throwable? = null,
    val retry: (() -> Unit)? = null
)

// Create a state class that represents the current state of your screen.
// This is where you'd wanna put data you have to display, like a list of items
// or maybe an error, and a function to call if you want to retry something

AdamMc331

public class AccountDAO_Impl implements AccountDAO {
  private final RoomDatabase __db;

  private final EntityInsertionAdapter __insertionAdapterOfAccount;

  private final EntityDeletionOrUpdateAdapter __deletionAdapterOfAccount;

  private final SharedSQLiteStatement __preparedStmtOfDeleteAll;

  public AccountDAO_Impl(RoomDatabase __db) {

AdamMc331

// NoClassDef
Caused by: java.lang.NoClassDefFoundError: com/android/ide/common/res2/ResourceSet
	at org.jetbrains.kotlin.gradle.plugin.Android25ProjectHandler.getResDirectories(Android25ProjectHandler.kt:185)
	at org.jetbrains.kotlin.gradle.plugin.Android25ProjectHandler.getResDirectories(Android25ProjectHandler.kt:21)


// Full
org.gradle.api.ProjectConfigurationException: A problem occurred configuring project ':app-refresh'.
	at org.gradle.configuration.project.LifecycleProjectEvaluator.addConfigurationFailure(LifecycleProjectEvaluator.java:94)
	at org.gradle.configuration.project.LifecycleProjectEvaluator.notifyAfterEvaluate(LifecycleProjectEvaluator.java:89)