Initial commit

app/.gitignore

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+/build

app/build.gradle

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+plugins {
+    id 'com.android.application'
+    id 'kotlin-android'
+    id 'kotlin-kapt'
+}
+
+android {
+    compileSdkVersion 30
+
+    defaultConfig {
+        applicationId "li.dadada.uuidgen"
+        minSdkVersion 22
+        targetSdkVersion 30
+        versionCode 1
+        versionName "1.0"
+
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled true
+            shrinkResources true
+            debuggable false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+        debug {
+            applicationIdSuffix ".debug"
+            debuggable true
+        }
+    }
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+    kotlinOptions {
+        jvmTarget = '1.8'
+    }
+
+    buildFeatures {
+        dataBinding = true
+    }
+}
+
+dependencies {
+    implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
+    implementation 'androidx.core:core-ktx:1.3.2'
+    implementation 'androidx.appcompat:appcompat:1.2.0'
+    implementation 'com.google.android.material:material:1.2.1'
+    implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
+    implementation 'androidx.navigation:navigation-fragment-ktx:2.3.1'
+    implementation 'androidx.navigation:navigation-ui-ktx:2.3.1'
+    implementation "androidx.room:room-runtime:$room_version"
+    kapt "androidx.room:room-compiler:$room_version"
+    implementation "androidx.room:room-ktx:$room_version"
+    testImplementation "androidx.room:room-testing:$room_version"
+    testImplementation 'junit:junit:4.13.1'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.2'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
+}

app/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

app/src/androidTest/java/li/dadada/uuidgen/ExampleInstrumentedTest.kt

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+package li.dadada.uuidgen
+
+import androidx.test.platform.app.InstrumentationRegistry
+import androidx.test.ext.junit.runners.AndroidJUnit4
+
+import org.junit.Test
+import org.junit.runner.RunWith
+
+import org.junit.Assert.*
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+@RunWith(AndroidJUnit4::class)
+class ExampleInstrumentedTest {
+    @Test
+    fun useAppContext() {
+        // Context of the app under test.
+        val appContext = InstrumentationRegistry.getInstrumentation().targetContext
+        assertEquals("li.dadada.uuidgen", appContext.packageName)
+    }
+}

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"
+    package="li.dadada.uuidgen">
+
+    <application
+        android:name=".UuidGen"
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.UUIDGen">
+        <activity
+            android:name=".ui.MainActivity"
+            android:label="@string/app_name"
+            android:theme="@style/Theme.UUIDGen.NoActionBar">
+            <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/li/dadada/uuidgen/UuidGen.kt

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+package li.dadada.uuidgen
+
+import android.app.Application
+import androidx.room.Room
+import li.dadada.uuidgen.model.AppDatabase
+import li.dadada.uuidgen.model.UuidDao
+
+class UuidGen : Application() {
+    internal val uuidDao : UuidDao by lazy {
+        db.uuidDao()
+    }
+
+    private val db: AppDatabase by lazy {
+        Room.databaseBuilder(
+            applicationContext,
+            AppDatabase::class.java, "uuids"
+        ).build()
+    }
+}

app/src/main/java/li/dadada/uuidgen/model/AppDatabase.kt

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+package li.dadada.uuidgen.model
+
+import androidx.room.Database
+import androidx.room.RoomDatabase
+
+@Database(entities = [Uuid::class], version = 1)
+abstract class AppDatabase : RoomDatabase() {
+    abstract fun uuidDao(): UuidDao
+}

app/src/main/java/li/dadada/uuidgen/model/Uuid.kt

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+package li.dadada.uuidgen.model
+
+import androidx.room.ColumnInfo
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+import java.util.*
+
+@Entity
+data class Uuid(
+    @PrimaryKey val uuid: String = UUID.randomUUID().toString(),
+    @ColumnInfo(name = "created") val created: Long = Date().time
+) {
+    override fun toString(): String {
+        return uuid
+    }
+
+    override fun equals(other: Any?): Boolean {
+        return if (other !is Uuid) {
+            false
+        } else {
+            uuid == other.uuid
+        }
+    }
+
+    override fun hashCode(): Int {
+        var result = uuid.hashCode()
+        result = 31 * result + created.hashCode()
+        return result
+    }
+}
+
+

app/src/main/java/li/dadada/uuidgen/model/UuidDao.kt

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+package li.dadada.uuidgen.model
+
+import androidx.lifecycle.LiveData
+import androidx.room.*
+
+@Dao
+interface UuidDao {
+    @Query("SELECT * FROM `uuid` ORDER BY `created` ASC")
+    fun getAll(): LiveData<List<Uuid>>
+
+    @Query("SELECT * FROM `uuid` WHERE `uuid` IS :uuid")
+    fun get(uuid: String) : List<Uuid>
+
+    @Insert(onConflict = OnConflictStrategy.ABORT)
+    fun insertAll(vararg uuid: Uuid)
+
+    @Delete
+    fun delete(user: Uuid)
+}

app/src/main/java/li/dadada/uuidgen/ui/MainActivity.kt

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+package li.dadada.uuidgen.ui
+
+import android.os.Bundle
+import android.view.Menu
+import android.view.MenuItem
+import androidx.appcompat.app.AppCompatActivity
+import androidx.navigation.findNavController
+import kotlinx.coroutines.*
+import li.dadada.uuidgen.*
+
+
+class MainActivity : AppCompatActivity(), CoroutineScope by MainScope() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        setContentView(R.layout.activity_main)
+        setSupportActionBar(findViewById(R.id.toolbar))
+    }
+
+    override fun onCreateOptionsMenu(menu: Menu): Boolean {
+        // Inflate the menu; this adds items to the action bar if it is present.
+        menuInflater.inflate(R.menu.menu_main, menu)
+        return true
+    }
+
+    override fun onOptionsItemSelected(item: MenuItem): Boolean {
+        return when (item.itemId) {
+            R.id.action_history -> {
+                findNavController(R.id.nav_host_fragment)
+                    .navigate(R.id.action_uuid_gen_fragment_to_uuid_list_fragment)
+                true
+            }
+            else -> super.onOptionsItemSelected(item)
+        }
+    }
+}

app/src/main/java/li/dadada/uuidgen/ui/UuidGenFragment.kt

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+package li.dadada.uuidgen.ui
+
+import android.content.ClipboardManager
+import android.content.Context
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.databinding.DataBindingUtil
+import androidx.fragment.app.Fragment
+import androidx.lifecycle.ViewModelProvider
+import com.google.android.material.snackbar.Snackbar
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.MainScope
+import kotlinx.coroutines.launch
+import li.dadada.uuidgen.R
+import li.dadada.uuidgen.databinding.UuidGenFragmentBinding
+import li.dadada.uuidgen.viewmodel.ClipBoardUtil
+import li.dadada.uuidgen.viewmodel.UuidViewModel
+
+
+class UuidGenFragment : Fragment(), CoroutineScope by MainScope() {
+
+    private val viewModel: UuidViewModel by lazy {
+        ViewModelProvider(this).get(UuidViewModel::class.java)
+    }
+
+    private lateinit var clipboardManager: ClipboardManager
+
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View {
+        val binding: UuidGenFragmentBinding =
+            DataBindingUtil.inflate(inflater, R.layout.uuid_gen_fragment, container, false)
+        clipboardManager = inflater.context.getSystemService(Context.CLIPBOARD_SERVICE) as ClipboardManager
+        binding.buttonGen.setOnClickListener { view ->
+            launch { genUuid(view) }
+        }
+        return binding.root
+    }
+
+    private suspend fun genUuid(view: View) {
+        val uuid = viewModel.genUuid()
+        if (uuid != null) {
+            ClipBoardUtil.copyUuid(uuid, view, clipboardManager)
+        } else {
+            Snackbar.make(view, R.string.warn_duplicate_uuid, Snackbar.LENGTH_SHORT)
+        }
+    }
+}

app/src/main/java/li/dadada/uuidgen/ui/UuidListFragment.kt

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+package li.dadada.uuidgen.ui
+
+import android.content.ClipboardManager
+import android.content.Context.CLIPBOARD_SERVICE
+import android.os.Bundle
+import androidx.fragment.app.Fragment
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.databinding.DataBindingUtil
+import androidx.lifecycle.Observer
+import androidx.lifecycle.ViewModelProvider
+import androidx.recyclerview.widget.LinearLayoutManager
+import li.dadada.uuidgen.R
+import li.dadada.uuidgen.model.Uuid
+import li.dadada.uuidgen.viewmodel.UuidAdapter
+import li.dadada.uuidgen.viewmodel.UuidViewModel
+import li.dadada.uuidgen.databinding.UuidListFragmentBinding
+import li.dadada.uuidgen.viewmodel.ClipBoardUtil
+import li.dadada.uuidgen.viewmodel.OnUuidClickListener
+
+
+/**
+ * A simple [Fragment] subclass as the default destination in the navigation.
+ */
+class UuidListFragment : Fragment() {
+    private val uuidAdapter = UuidAdapter(object : OnUuidClickListener {
+        override fun onUuidClicked(view: View, uuid: Uuid): Boolean {
+            ClipBoardUtil.copyUuid(
+                uuid,
+                view,
+                activity?.getSystemService(CLIPBOARD_SERVICE) as ClipboardManager)
+            return true
+        }
+    })
+
+    private lateinit var binding : UuidListFragmentBinding
+
+    override fun onCreateView(
+            inflater: LayoutInflater, container: ViewGroup?,
+            savedInstanceState: Bundle?
+    ): View? {
+        binding = DataBindingUtil.inflate(inflater, R.layout.uuid_list_fragment, container, false)
+        binding.listUuids.apply {
+            adapter = uuidAdapter
+            layoutManager = LinearLayoutManager(this@UuidListFragment.context)
+        }
+
+        return binding.root;
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        val viewModel = ViewModelProvider(this).get(UuidViewModel::class.java)
+        viewModel.uuidList.observe(viewLifecycleOwner,
+            Observer<List<Uuid>> { list -> uuidAdapter.submitList(list) })
+    }
+}

app/src/main/java/li/dadada/uuidgen/viewmodel/ClipBoardUtil.kt

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+package li.dadada.uuidgen.viewmodel
+
+import android.content.ClipData
+import android.content.ClipboardManager
+import android.view.View
+import com.google.android.material.snackbar.BaseTransientBottomBar
+import com.google.android.material.snackbar.Snackbar
+import li.dadada.uuidgen.model.Uuid
+
+object ClipBoardUtil {
+    fun copyUuid(uuid: Uuid, view: View, clipboardManager: ClipboardManager) {
+        clipboardManager.setPrimaryClip(ClipData.newPlainText("uuid", uuid.uuid))
+        Snackbar.make(view, "Copied $uuid to clipboard", BaseTransientBottomBar.LENGTH_SHORT)
+            .show()
+    }
+}

app/src/main/java/li/dadada/uuidgen/viewmodel/OnUuidClickListener.kt

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+package li.dadada.uuidgen.viewmodel
+
+import android.view.View
+import li.dadada.uuidgen.model.Uuid
+
+interface OnUuidClickListener {
+    fun onUuidClicked(view: View, uuid: Uuid) : Boolean
+}

app/src/main/java/li/dadada/uuidgen/viewmodel/UuidAdapter.kt

@@ -0,0 +1,56 @@
+package li.dadada.uuidgen.viewmodel
+
+import android.view.LayoutInflater
+import android.view.ViewGroup
+import androidx.databinding.DataBindingUtil
+import androidx.recyclerview.widget.DiffUtil
+import androidx.recyclerview.widget.ListAdapter
+import androidx.recyclerview.widget.RecyclerView
+import li.dadada.uuidgen.R
+import li.dadada.uuidgen.databinding.UuidItemBinding
+import li.dadada.uuidgen.model.Uuid
+
+
+class UuidAdapter(private val controller: OnUuidClickListener) : ListAdapter<Uuid, UuidAdapter.UuidViewHolder>(UuidDiffCallback()) {
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): UuidViewHolder {
+        return from(parent, controller)
+    }
+
+    override fun onBindViewHolder(holder: UuidViewHolder, position: Int) {
+        val item = getItem(position)
+        holder.bind(item)
+    }
+
+    class UuidViewHolder(
+        private val binding: UuidItemBinding,
+        private val listener: OnUuidClickListener
+    ) : RecyclerView.ViewHolder(binding.root) {
+        fun bind(item: Uuid) {
+            binding.uuid = item
+            binding.listener = listener
+            binding.executePendingBindings()
+        }
+    }
+
+    companion object {
+        fun from(parent: ViewGroup, listener: OnUuidClickListener) : UuidViewHolder {
+            val binding : UuidItemBinding = DataBindingUtil.inflate(
+                LayoutInflater.from(parent.context),
+                R.layout.uuid_item,
+                parent, false
+            )
+            return UuidViewHolder(binding, listener)
+        }
+    }
+}
+
+class UuidDiffCallback : DiffUtil.ItemCallback<Uuid>() {
+    override fun areItemsTheSame(oldItem: Uuid, newItem: Uuid): Boolean {
+        return oldItem == newItem
+    }
+
+    override fun areContentsTheSame(oldItem: Uuid, newItem: Uuid): Boolean {
+        return oldItem == newItem
+    }
+}

app/src/main/java/li/dadada/uuidgen/viewmodel/UuidViewModel.kt

@@ -0,0 +1,45 @@
+package li.dadada.uuidgen.viewmodel
+
+import android.app.Application
+import android.content.ClipData
+import android.content.ClipboardManager
+import android.view.View
+import androidx.lifecycle.AndroidViewModel
+import androidx.lifecycle.SavedStateHandle
+import com.google.android.material.snackbar.BaseTransientBottomBar
+import com.google.android.material.snackbar.Snackbar
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import li.dadada.uuidgen.UuidGen
+import li.dadada.uuidgen.model.Uuid
+import li.dadada.uuidgen.model.UuidDao
+
+
+internal class UuidViewModel(application: Application,
+                             savedStateHandle: SavedStateHandle
+) : AndroidViewModel(application) {
+
+    private val uuidDao : UuidDao by lazy {
+        (application as UuidGen).uuidDao
+    }
+
+    val uuidList = uuidDao.getAll()
+
+    suspend fun genUuid() : Uuid? {
+        return genUuid(uuidDao)
+    }
+
+    companion object {
+        private suspend fun genUuid(uuidDao: UuidDao) : Uuid? = withContext(Dispatchers.IO) {
+            val uuid = Uuid()
+            with(uuidDao) {
+                if (get(uuid.uuid).isEmpty()) {
+                    insertAll(uuid)
+                    uuid
+                } else {
+                    null
+                }
+            }
+        }
+    }
+}

app/src/main/res/drawable-v24/ic_launcher_foreground.xml

@@ -0,0 +1,31 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <group android:scaleX="0.5"
+        android:scaleY="0.5"
+        android:translateX="27"
+        android:translateY="27">
+        <path
+            android:pathData="m24.585,14.831l10.448,0l0,46.683q0,12.353 4.478,17.809 4.478,5.404 14.515,5.404 9.985,0 14.463,-5.404 4.478,-5.456 4.478,-17.809l0,-46.683l10.448,0l0,47.97q0,15.029 -7.463,22.698 -7.412,7.669 -21.926,7.669 -14.566,0 -22.029,-7.669 -7.412,-7.669 -7.412,-22.698z"
+            android:strokeWidth="0.264583"
+            android:fillColor="#000000"
+            android:strokeColor="#00000000"/>
+        <path
+            android:pathData="m40.025,42.285l4.996,0l0,22.324q0,5.907 2.141,8.516 2.141,2.584 6.941,2.584 4.775,0 6.916,-2.584 2.141,-2.609 2.141,-8.516l0,-22.324l4.996,0l0,22.94q0,7.187 -3.569,10.854 -3.544,3.667 -10.485,3.667 -6.966,0 -10.534,-3.667 -3.544,-3.667 -3.544,-10.854z"
+            android:strokeWidth="0.144474"
+            android:fillColor="#000000"
+            android:strokeColor="#00000000"/>
+        <path
+            android:pathData="m52.524,42.721l3.923,0l0,28.996L52.524,71.717Z"
+            android:strokeWidth="0.134163"
+            android:fillColor="#000000"
+            android:strokeColor="#00000000"/>
+        <path
+            android:pathData="m43.15,36.505l21.887,-0l0,-4.6q0,-5.825 -2.639,-8.521 -2.639,-2.715 -8.333,-2.715 -5.656,-0 -8.276,2.715 -2.639,2.696 -2.639,8.521zM40.021,40.313l0,-7.824q0,-8.182 3.412,-12.009 3.393,-3.827 10.632,-3.827 7.277,-0 10.689,3.846 3.412,3.846 3.412,11.99l0,7.824z"
+            android:strokeWidth="0.13023"
+            android:fillColor="#000000"
+            android:strokeColor="#00000000"/>
+    </group>
+</vector>

app/src/main/res/drawable/ic_baseline_history_24.xml

@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24"
+    android:tint="?attr/colorControlNormal">
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M13,3c-4.97,0 -9,4.03 -9,9L1,12l3.89,3.89 0.07,0.14L9,12L6,12c0,-3.87 3.13,-7 7,-7s7,3.13 7,7 -3.13,7 -7,7c-1.93,0 -3.68,-0.79 -4.94,-2.06l-1.42,1.42C8.27,19.99 10.51,21 13,21c4.97,0 9,-4.03 9,-9s-4.03,-9 -9,-9zM12,8v5l4.28,2.54 0.72,-1.21 -3.5,-2.08L13.5,8L12,8z"/>
+</vector>

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

@@ -0,0 +1,170 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path
+        android:fillColor="#3DDC84"
+        android:pathData="M0,0h108v108h-108z" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M9,0L9,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,0L19,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,0L29,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,0L39,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,0L49,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,0L59,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,0L69,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,0L79,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M89,0L89,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M99,0L99,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,9L108,9"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,19L108,19"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,29L108,29"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,39L108,39"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,49L108,49"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,59L108,59"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,69L108,69"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,79L108,79"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,89L108,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,99L108,99"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,29L89,29"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,39L89,39"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,49L89,49"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,59L89,59"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,69L89,69"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,79L89,79"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,19L29,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,19L39,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,19L49,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,19L59,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,19L69,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,19L79,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+</vector>

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

@@ -0,0 +1,31 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+  <group android:scaleX="0.5"
+      android:scaleY="0.5"
+      android:translateX="27"
+      android:translateY="27">
+    <path
+        android:pathData="m24.585,14.831l10.448,0l0,46.683q0,12.353 4.478,17.809 4.478,5.404 14.515,5.404 9.985,0 14.463,-5.404 4.478,-5.456 4.478,-17.809l0,-46.683l10.448,0l0,47.97q0,15.029 -7.463,22.698 -7.412,7.669 -21.926,7.669 -14.566,0 -22.029,-7.669 -7.412,-7.669 -7.412,-22.698z"
+        android:strokeWidth="0.264583"
+        android:fillColor="#000000"
+        android:strokeColor="#00000000"/>
+    <path
+        android:pathData="m40.025,42.285l4.996,0l0,22.324q0,5.907 2.141,8.516 2.141,2.584 6.941,2.584 4.775,0 6.916,-2.584 2.141,-2.609 2.141,-8.516l0,-22.324l4.996,0l0,22.94q0,7.187 -3.569,10.854 -3.544,3.667 -10.485,3.667 -6.966,0 -10.534,-3.667 -3.544,-3.667 -3.544,-10.854z"
+        android:strokeWidth="0.144474"
+        android:fillColor="#000000"
+        android:strokeColor="#00000000"/>
+    <path
+        android:pathData="m52.524,42.721l3.923,0l0,28.996L52.524,71.717Z"
+        android:strokeWidth="0.134163"
+        android:fillColor="#000000"
+        android:strokeColor="#00000000"/>
+    <path
+        android:pathData="m43.15,36.505l21.887,-0l0,-4.6q0,-5.825 -2.639,-8.521 -2.639,-2.715 -8.333,-2.715 -5.656,-0 -8.276,2.715 -2.639,2.696 -2.639,8.521zM40.021,40.313l0,-7.824q0,-8.182 3.412,-12.009 3.393,-3.827 10.632,-3.827 7.277,-0 10.689,3.846 3.412,3.846 3.412,11.99l0,7.824z"
+        android:strokeWidth="0.13023"
+        android:fillColor="#000000"
+        android:strokeColor="#00000000"/>
+  </group>
+</vector>

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

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <!-- pressed -->
+    <item android:drawable="@color/material_blue_grey_800" android:state_pressed="true" />
+    <!-- default -->
+    <item android:drawable="@color/background_floating_material_light" />
+</selector>

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

@@ -0,0 +1,16 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="20dp"
+    android:height="20dp"
+    android:viewportWidth="20"
+    android:viewportHeight="20">
+  <path
+      android:pathData="m6.4368,4.2333l1.4097,0l0,6.2986q0,1.6667 0.6042,2.4028 0.6042,0.7292 1.9583,0.7292 1.3472,0 1.9514,-0.7292 0.6042,-0.7361 0.6042,-2.4028l0,-6.2986l1.4097,0l0,6.4722q0,2.0278 -1.0069,3.0625 -1,1.0347 -2.9583,1.0347 -1.9653,0 -2.9722,-1.0347 -1,-1.0347 -1,-3.0625z"
+      android:strokeWidth="0.264583"
+      android:fillColor="#000000"
+      android:strokeColor="#00000000"/>
+  <path
+      android:pathData="m8.52,7.9375l0.6741,0l0,3.012q0,0.797 0.2889,1.149 0.2889,0.3487 0.9365,0.3487 0.6442,0 0.9332,-0.3487 0.2889,-0.352 0.2889,-1.149l0,-3.012l0.6741,0l0,3.0951q0,0.9697 -0.4815,1.4645 -0.4782,0.4948 -1.4147,0.4948 -0.9398,0 -1.4213,-0.4948 -0.4782,-0.4948 -0.4782,-1.4645z"
+      android:strokeWidth="0.144474"
+      android:fillColor="#000000"
+      android:strokeColor="#00000000"/>
+</vector>

app/src/main/res/layout/activity_main.xml

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".ui.MainActivity">
+
+    <com.google.android.material.appbar.AppBarLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:theme="@style/Theme.UUIDGen.AppBarOverlay">
+
+        <androidx.appcompat.widget.Toolbar
+            android:id="@+id/toolbar"
+            android:layout_width="match_parent"
+            android:layout_height="?attr/actionBarSize"
+            android:background="?attr/colorPrimary"
+            app:popupTheme="@style/Theme.UUIDGen.PopupOverlay" />
+
+    </com.google.android.material.appbar.AppBarLayout>
+
+    <include layout="@layout/content_main" />
+
+</androidx.coordinatorlayout.widget.CoordinatorLayout>

app/src/main/res/layout/content_main.xml

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    app:layout_behavior="@string/appbar_scrolling_view_behavior">
+
+    <androidx.fragment.app.FragmentContainerView
+        android:id="@+id/nav_host_fragment"
+        android:name="androidx.navigation.fragment.NavHostFragment"
+        android:layout_width="0dp"
+        android:layout_height="0dp"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintRight_toRightOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:defaultNavHost="true"
+        app:navGraph="@navigation/nav_graph" />
+</androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout/uuid_gen_fragment.xml

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <data>
+
+    </data>
+
+    <androidx.constraintlayout.widget.ConstraintLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent">
+
+        <Button
+            android:id="@+id/button_gen"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintTop_toTopOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintEnd_toEndOf="parent"
+            android:text="@string/action_generate"
+            android:textSize="40sp" />
+    </androidx.constraintlayout.widget.ConstraintLayout>
+</layout>

app/src/main/res/layout/uuid_item.xml

@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <data>
+
+        <variable
+            name="uuid"
+            type="li.dadada.uuidgen.model.Uuid" />
+
+        <variable
+            name="listener"
+            type="li.dadada.uuidgen.viewmodel.OnUuidClickListener" />
+    </data>
+
+    <LinearLayout
+        android:id="@+id/uuid_item"
+        android:layout_width="match_parent"
+        android:layout_height="42sp"
+        android:layout_gravity="top"
+        android:onClick="@{(view) -> listener.onUuidClicked(view, uuid)}"
+        android:orientation="vertical"
+        android:padding="6dip">
+
+        <TextView
+            android:id="@+id/uuid_uuid"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:singleLine="true"
+            android:text="@{uuid.uuid}"
+            android:textSize="16sp"
+            android:typeface="monospace"
+            tools:text="3966a07a-4699-48a2-b5a2-53d08a9f3d8f" />
+    </LinearLayout>
+</layout>

app/src/main/res/layout/uuid_list_fragment.xml

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <androidx.constraintlayout.widget.ConstraintLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        tools:context=".ui.UuidListFragment">
+
+
+        <androidx.recyclerview.widget.RecyclerView
+            android:id="@+id/list_uuids"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintLeft_toLeftOf="parent"
+            app:layout_constraintRight_toRightOf="parent"
+            app:layout_constraintTop_toTopOf="parent"
+            android:listSelector="@drawable/uuid_selector"
+            tools:layout_editor_absoluteX="88dp"
+            tools:layout_editor_absoluteY="287dp"
+            tools:listitem="@layout/uuid_item" />
+    </androidx.constraintlayout.widget.ConstraintLayout>
+</layout>

app/src/main/res/menu/menu_main.xml

@@ -0,0 +1,11 @@
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    tools:context="li.dadada.uuidgen.ui.MainActivity">
+    <item
+        android:id="@+id/action_history"
+        android:orderInCategory="100"
+        android:title="@string/action_history"
+        android:icon="@drawable/ic_baseline_history_24"
+        app:showAsAction="always" />
+</menu>

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

@@ -0,0 +1,5 @@
+<?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

@@ -0,0 +1,5 @@
+<?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/navigation/nav_graph.xml

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<navigation xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/nav_graph"
+    app:startDestination="@id/uuid_gen_fragment">
+
+    <fragment
+        android:id="@+id/uuid_gen_fragment"
+        android:name="li.dadada.uuidgen.ui.UuidGenFragment"
+        android:label="@string/first_fragment_label"
+        tools:layout="@layout/uuid_list_fragment" >
+        <action
+            android:id="@+id/action_uuid_gen_fragment_to_uuid_list_fragment"
+            app:destination="@id/uuid_list_fragment" />
+    </fragment>
+
+    <fragment
+        android:id="@+id/uuid_list_fragment"
+        android:name="li.dadada.uuidgen.ui.UuidListFragment"
+        tools:layout="@layout/uuid_list_fragment" />
+</navigation>

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

@@ -0,0 +1,16 @@
+<resources xmlns:tools="http://schemas.android.com/tools">
+    <!-- Base application theme. -->
+    <style name="Theme.UUIDGen" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
+        <!-- Primary brand color. -->
+        <item name="colorPrimary">@color/purple_200</item>
+        <item name="colorPrimaryVariant">@color/purple_700</item>
+        <item name="colorOnPrimary">@color/black</item>
+        <!-- Secondary brand color. -->
+        <item name="colorSecondary">@color/teal_200</item>
+        <item name="colorSecondaryVariant">@color/teal_200</item>
+        <item name="colorOnSecondary">@color/black</item>
+        <!-- Status bar color. -->
+        <item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>
+        <!-- Customize your theme here. -->
+    </style>
+</resources>

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

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="purple_200">#FFBB86FC</color>
+    <color name="purple_500">#FF6200EE</color>
+    <color name="purple_700">#FF3700B3</color>
+    <color name="teal_200">#FF03DAC5</color>
+    <color name="teal_700">#FF018786</color>
+    <color name="black">#FF000000</color>
+    <color name="white">#FFFFFFFF</color>
+</resources>

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

@@ -0,0 +1,3 @@
+<resources>
+    <dimen name="fab_margin">16dp</dimen>
+</resources>

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

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="ic_launcher_background">#3DDC84</color>
+</resources>

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

@@ -0,0 +1,8 @@
+<resources>
+    <string name="app_name">UuidGen</string>
+    <string name="action_history">History</string>
+    <!-- Strings used for fragments for navigation -->
+    <string name="first_fragment_label">UUID List Fragment</string>
+    <string name="warn_duplicate_uuid">Duplicate UUID. Try again!</string>
+    <string name="action_generate">Generate</string>
+</resources>

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

@@ -0,0 +1,25 @@
+<resources xmlns:tools="http://schemas.android.com/tools">
+    <!-- Base application theme. -->
+    <style name="Theme.UUIDGen" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
+        <!-- Primary brand color. -->
+        <item name="colorPrimary">@color/purple_500</item>
+        <item name="colorPrimaryVariant">@color/purple_700</item>
+        <item name="colorOnPrimary">@color/white</item>
+        <!-- Secondary brand color. -->
+        <item name="colorSecondary">@color/teal_200</item>
+        <item name="colorSecondaryVariant">@color/teal_700</item>
+        <item name="colorOnSecondary">@color/black</item>
+        <!-- Status bar color. -->
+        <item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>
+        <!-- Customize your theme here. -->
+    </style>
+
+    <style name="Theme.UUIDGen.NoActionBar">
+        <item name="windowActionBar">false</item>
+        <item name="windowNoTitle">true</item>
+    </style>
+
+    <style name="Theme.UUIDGen.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />
+
+    <style name="Theme.UUIDGen.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />
+</resources>

app/src/test/java/li/dadada/uuidgen/ExampleUnitTest.kt

@@ -0,0 +1,17 @@
+package li.dadada.uuidgen
+
+import org.junit.Test
+
+import org.junit.Assert.*
+
+/**
+ * Example local unit test, which will execute on the development machine (host).
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+class ExampleUnitTest {
+    @Test
+    fun addition_isCorrect() {
+        assertEquals(4, 2 + 2)
+    }
+}