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cp samples/{hellow-workflow,nested-overlays}
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‎samples/nested-overlays/build.gradle.kts‎

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plugins {
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id("com.android.application")
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`kotlin-android`
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`android-sample-app`
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`android-ui-tests`
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}
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android {
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defaultConfig {
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applicationId = "com.squareup.sample.nestedoverlays"
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}
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namespace = "com.squareup.sample.nestedoverlays"
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}
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dependencies {
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debugImplementation(libs.squareup.leakcanary.android)
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implementation(libs.androidx.activity.ktx)
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implementation(libs.androidx.lifecycle.viewmodel.ktx)
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implementation(libs.androidx.lifecycle.viewmodel.savedstate)
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implementation(libs.androidx.viewbinding)
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implementation(project(":workflow-ui:core-android"))
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implementation(project(":workflow-ui:core-common"))
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}

‎samples/nested-overlays/src/androidTest/java/com/squareup/sample/nestedoverlays/NestedOverlaysAppTest.kt‎

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package com.squareup.sample.nestedoverlays
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import androidx.test.espresso.action.ViewActions.click
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import androidx.test.espresso.assertion.ViewAssertions.matches
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import androidx.test.espresso.matcher.ViewMatchers.isDisplayed
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import androidx.test.espresso.matcher.ViewMatchers.withText
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import androidx.test.ext.junit.rules.ActivityScenarioRule
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import androidx.test.ext.junit.runners.AndroidJUnit4
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import com.squareup.workflow1.ui.WorkflowUiExperimentalApi
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import com.squareup.workflow1.ui.internal.test.IdlingDispatcherRule
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import com.squareup.workflow1.ui.internal.test.inAnyView
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import leakcanary.DetectLeaksAfterTestSuccess
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import org.junit.Rule
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import org.junit.Test
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import org.junit.rules.RuleChain
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import org.junit.runner.RunWith
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@RunWith(AndroidJUnit4::class)
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@OptIn(WorkflowUiExperimentalApi::class)
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class NestedOverlaysAppTest {
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private val scenarioRule = ActivityScenarioRule(NestedOverlaysActivity::class.java)
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@get:Rule val rules = RuleChain.outerRule(DetectLeaksAfterTestSuccess())
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.around(scenarioRule)
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.around(IdlingDispatcherRule)
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@Test fun togglesHelloAndGoodbye() {
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inAnyView(withText("Hello"))
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.check(matches(isDisplayed()))
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.perform(click())
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inAnyView(withText("Goodbye"))
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.check(matches(isDisplayed()))
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.perform(click())
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inAnyView(withText("Hello"))
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.check(matches(isDisplayed()))
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}
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}

‎samples/nested-overlays/src/main/AndroidManifest.xml‎

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<?xml version="1.0" encoding="utf-8"?>
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<manifest xmlns:android="http://schemas.android.com/apk/res/android"
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xmlns:tools="http://schemas.android.com/tools">
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<application
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android:allowBackup="false"
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android:label="@string/app_name"
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android:theme="@style/AppTheme"
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tools:ignore="GoogleAppIndexingWarning,MissingApplicationIcon"
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>
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<activity android:name="com.squareup.sample.nestedoverlays.NestedOverlaysActivity"
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android:exported="true">
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<intent-filter>
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<action android:name="android.intent.action.MAIN" />
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<category android:name="android.intent.category.LAUNCHER" />
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</intent-filter>
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</activity>
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</application>
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</manifest>

‎samples/nested-overlays/src/main/java/com/squareup/sample/nestedoverlays/HelloRendering.kt‎

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package com.squareup.sample.nestedoverlays
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import com.squareup.sample.nestedoverlays.databinding.HelloGoodbyeLayoutBinding
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import com.squareup.workflow1.ui.AndroidScreen
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import com.squareup.workflow1.ui.ScreenViewFactory
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import com.squareup.workflow1.ui.ScreenViewFactory.Companion.fromViewBinding
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import com.squareup.workflow1.ui.WorkflowUiExperimentalApi
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@OptIn(WorkflowUiExperimentalApi::class)
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data class HelloRendering(
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val message: String,
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val onClick: () -> Unit
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) : AndroidScreen<HelloRendering> {
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override val viewFactory: ScreenViewFactory<HelloRendering> =
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fromViewBinding(HelloGoodbyeLayoutBinding::inflate) { r, _ ->
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helloMessage.text = r.message
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helloMessage.setOnClickListener { r.onClick() }
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}
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}

‎samples/nested-overlays/src/main/java/com/squareup/sample/nestedoverlays/NestedOverlaysActivity.kt‎

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@file:OptIn(WorkflowExperimentalRuntime::class)
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package com.squareup.sample.nestedoverlays
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import android.os.Bundle
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import androidx.activity.viewModels
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import androidx.appcompat.app.AppCompatActivity
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import androidx.lifecycle.SavedStateHandle
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import androidx.lifecycle.ViewModel
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import androidx.lifecycle.viewModelScope
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import com.squareup.workflow1.WorkflowExperimentalRuntime
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import com.squareup.workflow1.config.AndroidRuntimeConfigTools
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import com.squareup.workflow1.ui.WorkflowLayout
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import com.squareup.workflow1.ui.WorkflowUiExperimentalApi
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import com.squareup.workflow1.ui.renderWorkflowIn
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import kotlinx.coroutines.flow.StateFlow
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@OptIn(WorkflowUiExperimentalApi::class)
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class NestedOverlaysActivity : AppCompatActivity() {
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override fun onCreate(savedInstanceState: Bundle?) {
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super.onCreate(savedInstanceState)
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// This ViewModel will survive configuration changes. It's instantiated
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// by the first call to viewModels(), and that original instance is returned by
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// succeeding calls.
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val model: HelloViewModel by viewModels()
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setContentView(
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WorkflowLayout(this).apply { take(lifecycle, model.renderings) }
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)
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}
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}
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class HelloViewModel(savedState: SavedStateHandle) : ViewModel() {
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@OptIn(WorkflowUiExperimentalApi::class)
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val renderings: StateFlow<HelloRendering> by lazy {
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renderWorkflowIn(
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workflow = NestedOverlaysWorkflow,
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scope = viewModelScope,
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savedStateHandle = savedState,
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runtimeConfig = AndroidRuntimeConfigTools.getAppWorkflowRuntimeConfig()
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)
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}
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}

‎samples/nested-overlays/src/main/java/com/squareup/sample/nestedoverlays/NestedOverlaysWorkflow.kt‎

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package com.squareup.sample.nestedoverlays
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import com.squareup.sample.nestedoverlays.NestedOverlaysWorkflow.State
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import com.squareup.sample.nestedoverlays.NestedOverlaysWorkflow.State.Goodbye
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import com.squareup.sample.nestedoverlays.NestedOverlaysWorkflow.State.Hello
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import com.squareup.workflow1.Snapshot
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import com.squareup.workflow1.StatefulWorkflow
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import com.squareup.workflow1.action
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import com.squareup.workflow1.parse
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object NestedOverlaysWorkflow : StatefulWorkflow<Unit, State, Nothing, HelloRendering>() {
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enum class State {
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Hello,
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Goodbye
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}
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override fun initialState(
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props: Unit,
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snapshot: Snapshot?
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): State = snapshot?.bytes?.parse { source -> if (source.readInt() == 1) Hello else Goodbye }
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?: Hello
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override fun render(
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renderProps: Unit,
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renderState: State,
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context: RenderContext
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): HelloRendering {
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return HelloRendering(
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message = renderState.name,
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onClick = { context.actionSink.send(helloAction) }
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)
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}
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override fun snapshotState(state: State): Snapshot = Snapshot.of(if (state == Hello) 1 else 0)
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private val helloAction = action {
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state = when (state) {
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Hello -> Goodbye
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Goodbye -> Hello
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}
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}
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}

‎samples/nested-overlays/src/main/res/layout/hello_goodbye_layout.xml‎

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<?xml version="1.0" encoding="utf-8"?>
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<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
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android:orientation="vertical"
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android:layout_width="match_parent"
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android:layout_height="match_parent">
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<TextView
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android:id="@+id/hello_message"
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android:layout_width="match_parent"
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android:layout_height="match_parent"
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android:gravity="center"
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/>
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</LinearLayout>

‎samples/nested-overlays/src/main/res/values/strings.xml‎

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<resources>
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<string name="app_name">Nested Overlays</string>
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</resources>

‎samples/nested-overlays/src/main/res/values/styles.xml‎

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<resources>
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<!-- Base application theme. -->
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<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
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<!-- Customize your theme here. -->
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</style>
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</resources>

‎settings.gradle.kts‎

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":samples:hello-terminal:todo-terminal-app",
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":samples:hello-workflow",
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":samples:hello-workflow-fragment",
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":samples:nested-overlays",
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":samples:stub-visibility",
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":samples:tictactoe:app",
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":samples:tictactoe:common",

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