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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,7 @@ | ||
| val list = arrayListOf<Double>(2.0, 3.0, 7.0) | ||
| var sum = 0 | ||
| list.forEach{ | ||
| sum += it.toInt() | ||
| } | ||
| println(sum/list.size) // 4 | ||
| println(list.average().toInt()) // 4 |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,42 @@ | ||
| package katas.`3kyu` | ||
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| import java.util.* | ||
| import kotlin.coroutines.* | ||
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| fun plus(o1: Optional<Int>, o2: Optional<Int>): Optional<Int> = `for` { | ||
| val i1: Int = bind(o1) | ||
| val i2: Int = bind(o2) | ||
| yield(i1 + i2) | ||
| } | ||
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| suspend fun <T> bind(value: Optional<T>): T { | ||
| return suspendCoroutine { cont -> | ||
| if (value.isPresent) | ||
| cont.resumeWith(Result.success(value.get())) | ||
| else | ||
| cont.resumeWith(Result.failure(fail())) | ||
| } | ||
| } | ||
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| fun <T> yield(value: T) = Optional.of(value) | ||
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| fun <T> `for`(lambda: suspend () -> Optional<T>): Optional<T> { | ||
| var ret: Optional<T> = Optional.empty() | ||
| val completion: Continuation<Optional<T>> = object : Continuation<Optional<T>> { | ||
| override val context: CoroutineContext = EmptyCoroutineContext | ||
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| override fun resumeWith(result: Result<Optional<T>>) { | ||
| ret = result.getOrElse { | ||
| when (it) { | ||
| is NoSuchElementException -> Optional.empty() | ||
| else -> throw it | ||
| } | ||
| } | ||
| } | ||
| } | ||
| lambda.startCoroutine(completion) | ||
| return ret | ||
| } | ||
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| fun fail() = Exception() | ||
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| @@ -0,0 +1,30 @@ | ||
| // Step 1: Add deep link element inside fragment of navigation graph | ||
| <deepLink app:uri="test://fetch/account" /> | ||
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| // Step 2: To enable implicit deep linking, Add a single <nav-graph> element to an activity that points to an existing navigation graph | ||
| <?xml version="1.0" encoding="utf-8"?> | ||
| <manifest xmlns:android="http://schemas.android.com/apk/res/android" | ||
| package="com.example.myapplication"> | ||
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| <application ... > | ||
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| <activity name=".MainActivity" ...> | ||
| ... | ||
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| <nav-graph android:value="@navigation/nav_graph" /> | ||
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| ... | ||
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| </activity> | ||
| </application> | ||
| </manifest> | ||
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| // Step 3 (Optional): Also you can handle parameters of deep link with placeholder | ||
| <deepLink app:uri="test://fetch/account?displayName={display_name}" /> | ||
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| // Step 4: To read data from placeholder, you need add an argument below deep link element | ||
| <argument android:name="display_name" app:argType="string"/> | ||
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| // Step 5: Now you can use deep link placeholder's data in fragment with arguments | ||
| val displayName = arguments?.get("display_name") as String |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,34 @@ | ||
| val spanned = spannable { | ||
| bold("Sample Bold") + | ||
| italic("And Italic Text") + | ||
| color(Color.BLUE, "Blue Colored Text") | ||
| } | ||
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| val nested = spannable{ bold(italic("nested ")) + url("www.google.com", "text") } | ||
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| textView.text = spanned + nested | ||
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| // Spannable.kt extension for further manipulations | ||
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| import android.text.Spannable | ||
| import android.text.SpannableString | ||
| import android.text.TextUtils | ||
| import android.text.style.* | ||
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| fun spannable(func: () -> SpannableString) = func() | ||
| private fun span(s: CharSequence, o: Any) = (if (s is String) SpannableString(s) else s as? SpannableString | ||
| ?: SpannableString("")).apply { setSpan(o, 0, length, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE) } | ||
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| operator fun SpannableString.plus(s: SpannableString) = SpannableString(TextUtils.concat(this, s)) | ||
| operator fun SpannableString.plus(s: String) = SpannableString(TextUtils.concat(this, s)) | ||
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| fun bold(s: CharSequence) = span(s, StyleSpan(android.graphics.Typeface.BOLD)) | ||
| fun italic(s: CharSequence) = span(s, StyleSpan(android.graphics.Typeface.ITALIC)) | ||
| fun underline(s: CharSequence) = span(s, UnderlineSpan()) | ||
| fun strike(s: CharSequence) = span(s, StrikethroughSpan()) | ||
| fun sup(s: CharSequence) = span(s, SuperscriptSpan()) | ||
| fun sub(s: CharSequence) = span(s, SubscriptSpan()) | ||
| fun size(size: Float, s: CharSequence) = span(s, RelativeSizeSpan(size)) | ||
| fun color(color: Int, s: CharSequence) = span(s, ForegroundColorSpan(color)) | ||
| fun background(color: Int, s: CharSequence) = span(s, BackgroundColorSpan(color)) | ||
| fun url(url: String, s: CharSequence) = span(s, URLSpan(url)) |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,21 @@ | ||
| // Step 1: Create or retrieve the Master Key for encryption/decryption | ||
| val masterKeyAlias = MasterKeys.getOrCreate(MasterKeys.AES256_GCM_SPEC) | ||
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| // Step 2: Initialize/open an instance of EncryptedSharedPreferences | ||
| val sharedPreferences = EncryptedSharedPreferences.create( | ||
| "secret_shared_prefs", | ||
| masterKeyAlias, | ||
| applicationContext, | ||
| EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV, | ||
| EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM | ||
| ) | ||
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| // Step 3: Save data to the EncryptedSharedPreferences as usual | ||
| sharedPreferences.edit() | ||
| .putString("KEY_VALUE", saveText.text.toString()) | ||
| .apply() | ||
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| // Step 4: Read data from EncryptedSharedPreferences as usual | ||
| val value = sharedPreferences.getString("KEY_VALUE", "") |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,15 @@ | ||
| /* | ||
| Your Activity, in the onCreate method, | ||
| setContent{ | ||
| //call the composable method | ||
| setTextIntoTheColumn("TextView Text1", "TextView Text2") | ||
| } | ||
| */ | ||
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| @Composable | ||
| fun setTextIntoTheColumn(messageOne: String, messageTwo: String) { | ||
| Column { | ||
| Text(text = messageOne) | ||
| Text(text = messageTwo) | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,46 @@ | ||
| // Transformations switchMap and map LiveData-KTX usage | ||
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| /* These methods permit functional composition and delegation of LiveData instances. The transformations are calculated | ||
| * lazily, and will run only when the returned LiveData is observed. Lifecycle behavior is propagated from the input | ||
| * source LiveData to the returned one. - more info.: developer.android.com/reference/androidx/lifecycle/Transformations | ||
| */ | ||
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| class DashboardFragmentViewModel @Inject internal constructor(private val currentWeatherUseCase: CurrentWeatherUseCase) : BaseViewModel() { | ||
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| private val _currentWeatherParams: MutableLiveData<CurrentWeatherUseCase.CurrentWeatherParams> = MutableLiveData() | ||
| fun getCurrentWeatherViewState() = currentWeatherViewState | ||
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| private val currentWeatherViewState: LiveData<CurrentWeatherViewState> = _currentWeatherParams.switchMap { params -> | ||
| currentWeatherUseCase.execute(params) // When _currentWeatherParams triggered `switchMap` returns useCase.execute() | ||
| } | ||
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| fun setCurrentWeatherParams(params: CurrentWeatherUseCase.CurrentWeatherParams) { | ||
| if (_currentWeatherParams.value == params) | ||
| return | ||
| _currentWeatherParams.postValue(params) | ||
| } | ||
| } | ||
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| class CurrentWeatherUseCase @Inject internal constructor(private val repository: CurrentWeatherRepository) : UseCaseLiveData<CurrentWeatherViewState, CurrentWeatherUseCase.CurrentWeatherParams, CurrentWeatherRepository>() { | ||
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| override fun buildUseCaseObservable(params: CurrentWeatherParams?): LiveData<CurrentWeatherViewState> { | ||
| return repository.loadCurrentWeatherByGeoCords( | ||
| params?.lat?.toDouble() ?: 0.0, | ||
| params?.lon?.toDouble() ?: 0.0, | ||
| params?.fetchRequired | ||
| ?: false, | ||
| units = params?.units ?: Constants.Coords.METRIC | ||
| ).map { // When loadCurrentWeatherByGeoCords triggered `map` returns onCurrentWeatherResultReady() | ||
| onCurrentWeatherResultReady(it) | ||
| } | ||
| } | ||
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| private fun onCurrentWeatherResultReady(resource: Resource<CurrentWeatherEntity>): CurrentWeatherViewState { | ||
| return CurrentWeatherViewState( | ||
| status = resource.status, | ||
| error = resource.message, | ||
| data = resource.data | ||
| ) | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,46 @@ | ||
| // Reading-Writing lists from/to RoomDB with Moshi | ||
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| object DataConverter { | ||
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| @TypeConverter | ||
| @JvmStatic | ||
| fun stringToList(data: String?): List<ListItem>? { | ||
| if (data == null) { | ||
| return emptyList() | ||
| } | ||
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| val moshi = Moshi.Builder().build() | ||
| val type = Types.newParameterizedType(List::class.java, ListItem::class.java) | ||
| val adapter = moshi.adapter<List<ListItem>>(type) | ||
| return adapter.fromJson(data) | ||
| } | ||
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| @TypeConverter | ||
| @JvmStatic | ||
| fun listToString(objects: List<ListItem>): String { | ||
| val moshi = Moshi.Builder().build() | ||
| val type = Types.newParameterizedType(List::class.java, ListItem::class.java) | ||
| val adapter = moshi.adapter<List<ListItem>>(type) | ||
| return adapter.toJson(objects) | ||
| } | ||
| } | ||
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| // -- Don't forget to add your TypeConverter to Database. -- | ||
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| @Database( | ||
| entities = [ | ||
| ForecastEntity::class, | ||
| CurrentWeatherEntity::class, | ||
| CitiesForSearchEntity::class | ||
| ], | ||
| version = 2 | ||
| ) | ||
| @TypeConverters(DataConverter::class) | ||
| abstract class WeatherDatabase : RoomDatabase() { | ||
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| abstract fun forecastDao(): ForecastDao | ||
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| abstract fun currentWeatherDao(): CurrentWeatherDao | ||
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| abstract fun citiesForSearchDao(): CitiesForSearchDao | ||
| } |
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