Add source

.gitignore

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+*.iml
+.gradle
+/local.properties
+/.idea
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+.cxx
+local.properties

app/.gitignore

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+/build

app/build.gradle.kts

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+plugins {
+    id("com.android.application")
+    id("org.jetbrains.kotlin.android")
+}
+
+android {
+    namespace = "net.leodesouza.blitz"
+    compileSdk = 34
+
+    defaultConfig {
+        applicationId = "net.leodesouza.blitz"
+        minSdk = 23
+        targetSdk = 34
+        versionCode = 100
+        versionName = "1.0.0"
+    }
+
+    buildTypes {
+        release {
+            isMinifyEnabled = true
+        }
+    }
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_1_8
+        targetCompatibility = JavaVersion.VERSION_1_8
+    }
+    kotlinOptions {
+        jvmTarget = "1.8"
+    }
+    buildFeatures {
+        compose = true
+    }
+    composeOptions {
+        kotlinCompilerExtensionVersion = "1.5.1"
+    }
+    packaging {
+        resources {
+            excludes += "/META-INF/{AL2.0,LGPL2.1}"
+        }
+    }
+}
+
+dependencies {
+    implementation("androidx.core:core-ktx:1.12.0")
+    implementation("androidx.activity:activity-compose:1.8.2")
+    implementation(platform("androidx.compose:compose-bom:2023.08.00"))
+    implementation("androidx.compose.ui:ui-tooling-preview")
+    implementation("androidx.compose.material3:material3")
+    debugImplementation("androidx.compose.ui:ui-tooling")
+}

app/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+    <application
+        android:icon="@mipmap/ic_launcher"
+        android:label="Blitz"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:theme="@style/Theme.Blitz"
+        tools:targetApi="31">
+        <activity
+            android:name=".MainActivity"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+</manifest>

app/src/main/java/net/leodesouza/blitz/MainActivity.kt

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+package net.leodesouza.blitz
+
+import android.content.pm.ActivityInfo
+import android.os.Build
+import android.os.Bundle
+import android.os.SystemClock.elapsedRealtime
+import android.text.format.DateUtils.formatElapsedTime
+import android.view.WindowManager
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.BackHandler
+import androidx.activity.compose.setContent
+import androidx.activity.enableEdgeToEdge
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.wrapContentSize
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableIntStateOf
+import androidx.compose.runtime.mutableLongStateOf
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.platform.LocalConfiguration
+import androidx.compose.ui.platform.LocalDensity
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+import kotlinx.coroutines.delay
+
+class MainActivity : ComponentActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        enableEdgeToEdge()
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
+            window.attributes.layoutInDisplayCutoutMode =
+                WindowManager.LayoutParams.LAYOUT_IN_DISPLAY_CUTOUT_MODE_SHORT_EDGES
+        }
+        requestedOrientation = ActivityInfo.SCREEN_ORIENTATION_USER_LANDSCAPE
+        super.onCreate(savedInstanceState)
+        setContent {
+            CountDown(303_000L, 3_000L) { whiteTime, blackTime, onClick ->
+                ChessClock(whiteTime, blackTime, onClick)
+            }
+        }
+    }
+}
+
+@Composable
+fun CountDown(
+    duration: Long,
+    increment: Long,
+    content: @Composable (whiteTime: Long, blackTime: Long, onClick: () -> Unit) -> Unit
+) {
+    var whiteTime by remember { mutableLongStateOf(duration) }
+    var blackTime by remember { mutableLongStateOf(duration) }
+    var endTime by remember { mutableLongStateOf(elapsedRealtime() + duration) }
+    var timesPressed by remember { mutableIntStateOf(0) }
+    var isPressed by remember { mutableStateOf(false) }
+    var isRunning by remember { mutableStateOf(false) }
+    val onClick = {
+        timesPressed++
+        isPressed = true
+    }
+    content.invoke(whiteTime, blackTime, onClick)
+    BackHandler(isRunning) {
+        timesPressed--
+        isRunning = false
+    }
+    LaunchedEffect(whiteTime, blackTime, isPressed) {
+        val isBlackTurn = (timesPressed % 2 == 0)
+        if (isPressed) {
+            if (isRunning) {
+                if (isBlackTurn) {
+                    whiteTime += increment
+                } else {
+                    blackTime += increment
+                }
+            } else {
+                isRunning = true
+            }
+            endTime = elapsedRealtime() + if (isBlackTurn) blackTime else whiteTime
+            isPressed = false
+        }
+        if (isRunning) {
+            val remainingTime = if (elapsedRealtime() < endTime) {
+                delay((endTime - elapsedRealtime()) % 100L)
+                endTime - elapsedRealtime()
+            } else {
+                0L
+            }
+            if (isBlackTurn) blackTime = remainingTime
+            else whiteTime = remainingTime
+        }
+    }
+}
+
+@Composable
+fun ChessClock(whiteTime: Long, blackTime: Long, onClick: () -> Unit) {
+    Surface(onClick) {
+        Row {
+            Time(
+                whiteTime,
+                color = if (whiteTime == 0L) Color.Red else Color.Black,
+                modifier = Modifier
+                    .background(Color.White)
+                    .weight(1F)
+                    .fillMaxSize()
+                    .wrapContentSize()
+            )
+            Time(
+                blackTime,
+                color = if (blackTime == 0L) Color.Red else Color.White,
+                modifier = Modifier
+                    .background(Color.Black)
+                    .weight(1F)
+                    .fillMaxSize()
+                    .wrapContentSize()
+            )
+        }
+    }
+}
+
+@Composable
+fun Time(timeMillis: Long, color: Color, modifier: Modifier = Modifier) {
+    val roundedTime = (timeMillis + 50L) / 100L
+    val integerPart = formatElapsedTime(roundedTime / 10L)
+    val decimalPart = roundedTime % 10L
+    Text(
+        text = "$integerPart.$decimalPart",
+        modifier = modifier,
+        color = color,
+        fontSize = with(LocalDensity.current) {
+            (LocalConfiguration.current.screenWidthDp / 8).dp.toSp()
+        },
+    )
+}
+
+@Preview
+@Composable
+fun ChessClockPreview() {
+    CountDown(13_000L, 3_000L) { whiteTime, blackTime, onClick ->
+        ChessClock(whiteTime, blackTime, onClick)
+    }
+}

app/src/main/res/drawable/ic_launcher_foreground.xml

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+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="960"
+    android:viewportHeight="960"
+    android:tint="#000000">
+  <group android:scaleX="0.58"
+      android:scaleY="0.58"
+      android:translateX="201.6"
+      android:translateY="201.6">
+    <path
+        android:fillColor="@android:color/white"
+        android:pathData="M480,840Q406,840 340.5,811.5Q275,783 226,734Q177,685 148.5,619.5Q120,554 120,480Q120,402 150,334Q180,266 234,217Q246,206 262.5,206.5Q279,207 290,218L508,436Q519,447 519,464Q519,481 508,492Q497,503 480,503Q463,503 452,492L264,304Q234,340 217,384.5Q200,429 200,480Q200,596 282,678Q364,760 480,760Q596,760 678,678Q760,596 760,480Q760,373 691.5,295.5Q623,218 520,204L520,240Q520,257 508.5,268.5Q497,280 480,280Q463,280 451.5,268.5Q440,257 440,240L440,160Q440,143 451.5,131.5Q463,120 480,120Q554,120 619.5,148.5Q685,177 734,226Q783,275 811.5,340.5Q840,406 840,480Q840,554 811.5,619.5Q783,685 734,734Q685,783 619.5,811.5Q554,840 480,840ZM280,520Q263,520 251.5,508.5Q240,497 240,480Q240,463 251.5,451.5Q263,440 280,440Q297,440 308.5,451.5Q320,463 320,480Q320,497 308.5,508.5Q297,520 280,520ZM480,720Q463,720 451.5,708.5Q440,697 440,680Q440,663 451.5,651.5Q463,640 480,640Q497,640 508.5,651.5Q520,663 520,680Q520,697 508.5,708.5Q497,720 480,720ZM680,520Q663,520 651.5,508.5Q640,497 640,480Q640,463 651.5,451.5Q663,440 680,440Q697,440 708.5,451.5Q720,463 720,480Q720,497 708.5,508.5Q697,520 680,520Z"/>
+  </group>
+</vector>

app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/ic_launcher_background"/>
+    <foreground android:drawable="@drawable/ic_launcher_foreground"/>
+</adaptive-icon>

app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/ic_launcher_background"/>
+    <foreground android:drawable="@drawable/ic_launcher_foreground"/>
+</adaptive-icon>

app/src/main/res/values/ic_launcher_background.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="ic_launcher_background">#FFFFFF</color>
+</resources>

app/src/main/res/values/themes.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <style name="Theme.Blitz" parent="android:Theme.Material.Light.NoActionBar" />
+</resources>

build.gradle.kts

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+// Top-level build file where you can add configuration options common to all sub-projects/modules.
+plugins {
+    id("com.android.application") version "8.2.2" apply false
+    id("org.jetbrains.kotlin.android") version "1.9.0" apply false
+}

gradle.properties

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+# Project-wide Gradle settings.
+# IDE (e.g. Android Studio) users:
+# Gradle settings configured through the IDE *will override*
+# any settings specified in this file.
+# For more details on how to configure your build environment visit
+# http://www.gradle.org/docs/current/userguide/build_environment.html
+# Specifies the JVM arguments used for the daemon process.
+# The setting is particularly useful for tweaking memory settings.
+org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8
+# When configured, Gradle will run in incubating parallel mode.
+# This option should only be used with decoupled projects. More details, visit
+# http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
+# org.gradle.parallel=true
+# AndroidX package structure to make it clearer which packages are bundled with the
+# Android operating system, and which are packaged with your app's APK
+# https://developer.android.com/topic/libraries/support-library/androidx-rn
+android.useAndroidX=true
+# Kotlin code style for this project: "official" or "obsolete":
+kotlin.code.style=official
+# Enables namespacing of each library's R class so that its R class includes only the
+# resources declared in the library itself and none from the library's dependencies,
+# thereby reducing the size of the R class for that library
+android.nonTransitiveRClass=true

gradle/wrapper/gradle-wrapper.properties

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+#Tue Feb 20 11:40:55 CET 2024
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.2-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists