Add template

app/build.gradle.kts

@@ -1,6 +1,9 @@
 plugins {
     kotlinAndroid
     androidApplication
+    jetbrainsKotlinSerialization version Version.Kotlin.language
+    kotlinAnnotationProcessor
+    id("com.google.dagger.hilt.android").version("2.51.1")
 }
 
 val packageName = "ru.myitschool.work"
@@ -34,4 +37,33 @@ android {
 dependencies {
     defaultLibrary()
 
+    implementation(Dependencies.AndroidX.activity)
+    implementation(Dependencies.AndroidX.fragment)
+    implementation(Dependencies.AndroidX.constraintLayout)
+
+    implementation(Dependencies.AndroidX.Navigation.fragment)
+    implementation(Dependencies.AndroidX.Navigation.navigationUi)
+
+    implementation(Dependencies.Retrofit.library)
+    implementation(Dependencies.Retrofit.gsonConverter)
+
+    implementation("com.squareup.picasso:picasso:2.8")
+    implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.7.1")
+    implementation("androidx.datastore:datastore-preferences:1.1.1")
+    implementation("com.google.mlkit:barcode-scanning:17.3.0")
+
+    val cameraX = "1.3.4"
+    implementation("androidx.camera:camera-core:$cameraX")
+    implementation("androidx.camera:camera-camera2:$cameraX")
+    implementation("androidx.camera:camera-lifecycle:$cameraX")
+    implementation("androidx.camera:camera-view:$cameraX")
+    implementation("androidx.camera:camera-mlkit-vision:1.4.0-rc04")
+
+    val hilt = "2.51.1"
+    implementation("com.google.dagger:hilt-android:$hilt")
+    kapt("com.google.dagger:hilt-android-compiler:$hilt")
+}
+
+kapt {
+    correctErrorTypes = true
 }

app/src/main/AndroidManifest.xml

@@ -2,7 +2,12 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools">
 
+    <uses-feature android:name="android.hardware.camera.any" />
+    <uses-permission android:name="android.permission.CAMERA" />
+    <uses-permission android:name="android.permission.INTERNET" />
+
     <application
+        android:name=".App"
         android:allowBackup="true"
         android:dataExtractionRules="@xml/data_extraction_rules"
         android:fullBackupContent="@xml/backup_rules"
@@ -11,6 +16,16 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/Theme.Default"
-        tools:targetApi="31" />
+        tools:targetApi="31">
+        <activity
+            android:name=".ui.RootActivity"
+            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/ru/myitschool/work/App.kt

@@ -0,0 +1,7 @@
+package ru.myitschool.work
+
+import android.app.Application
+import dagger.hilt.android.HiltAndroidApp
+
+@HiltAndroidApp
+class App : Application()

app/src/main/java/ru/myitschool/work/core/Constants.kt

@@ -0,0 +1,5 @@
+package ru.myitschool.work.core
+// НЕ ИЗМЕНЯЙТЕ ЭТОТ ФАЙЛ. В ТЕСТАХ ОН БУДЕМ ВОЗВРАЩЁН В ИСХОДНОЕ СОСТОЯНИЕ
+object Constants {
+    const val SERVER_ADDRESS = "http://localhost:8090"
+}

app/src/main/java/ru/myitschool/work/ui/RootActivity.kt

@@ -0,0 +1,56 @@
+package ru.myitschool.work.ui
+
+import android.os.Bundle
+import androidx.activity.OnBackPressedCallback
+import androidx.appcompat.app.AppCompatActivity
+import androidx.navigation.createGraph
+import androidx.navigation.findNavController
+import androidx.navigation.fragment.NavHostFragment
+import androidx.navigation.fragment.fragment
+import dagger.hilt.android.AndroidEntryPoint
+import ru.myitschool.work.R
+import ru.myitschool.work.ui.login.LoginDestination
+import ru.myitschool.work.ui.login.LoginFragment
+import ru.myitschool.work.ui.qr.scan.QrScanDestination
+import ru.myitschool.work.ui.qr.scan.QrScanFragment
+
+// НЕ ИЗМЕНЯЙТЕ НАЗВАНИЕ КЛАССА!
+@AndroidEntryPoint
+class RootActivity : AppCompatActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_root)
+
+        val navHostFragment = supportFragmentManager
+            .findFragmentById(R.id.nav_host_fragment) as NavHostFragment?
+
+        if (navHostFragment != null) {
+            val navController = navHostFragment.navController
+            navController.graph = navController.createGraph(
+                startDestination = LoginDestination
+            ) {
+                fragment<LoginFragment, LoginDestination>()
+                fragment<QrScanFragment, QrScanDestination>()
+            }
+        }
+
+        onBackPressedDispatcher.addCallback(
+            this,
+            object : OnBackPressedCallback(true) {
+                override fun handleOnBackPressed() {
+                    onSupportNavigateUp()
+                }
+            }
+        )
+    }
+
+    override fun onSupportNavigateUp(): Boolean {
+        val navController = findNavController(R.id.nav_host_fragment)
+        val popBackResult = if (navController.previousBackStackEntry != null) {
+            navController.popBackStack()
+        } else {
+            false
+        }
+        return popBackResult || super.onSupportNavigateUp()
+    }
+}

app/src/main/java/ru/myitschool/work/ui/login/LoginDestination.kt

@@ -0,0 +1,6 @@
+package ru.myitschool.work.ui.login
+
+import kotlinx.serialization.Serializable
+
+@Serializable
+data object LoginDestination

app/src/main/java/ru/myitschool/work/ui/login/LoginFragment.kt

@@ -0,0 +1,36 @@
+package ru.myitschool.work.ui.login
+
+import android.os.Bundle
+import android.view.View
+import androidx.fragment.app.Fragment
+import androidx.fragment.app.viewModels
+import dagger.hilt.android.AndroidEntryPoint
+import ru.myitschool.work.R
+import ru.myitschool.work.databinding.FragmentLoginBinding
+import ru.myitschool.work.utils.collectWhenStarted
+import ru.myitschool.work.utils.visibleOrGone
+
+@AndroidEntryPoint
+class LoginFragment : Fragment(R.layout.fragment_login) {
+    private var _binding: FragmentLoginBinding? = null
+    private val binding: FragmentLoginBinding get() = _binding!!
+
+    private val viewModel: LoginViewModel by viewModels()
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        _binding = FragmentLoginBinding.bind(view)
+        subscribe()
+    }
+
+    private fun subscribe() {
+        viewModel.state.collectWhenStarted(this) { state ->
+            binding.loading.visibleOrGone(state)
+        }
+    }
+
+    override fun onDestroyView() {
+        _binding = null
+        super.onDestroyView()
+    }
+}

app/src/main/java/ru/myitschool/work/ui/login/LoginViewModel.kt

@@ -0,0 +1,17 @@
+package ru.myitschool.work.ui.login
+
+import android.content.Context
+import androidx.lifecycle.ViewModel
+import dagger.hilt.android.lifecycle.HiltViewModel
+import dagger.hilt.android.qualifiers.ApplicationContext
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import javax.inject.Inject
+
+@HiltViewModel
+class LoginViewModel @Inject constructor(
+    @ApplicationContext private val context: Context,
+) : ViewModel() {
+    private val _state = MutableStateFlow(true)
+    val state = _state.asStateFlow()
+}

app/src/main/java/ru/myitschool/work/ui/qr/scan/QrScanDestination.kt

@@ -0,0 +1,30 @@
+package ru.myitschool.work.ui.qr.scan
+
+import android.os.Bundle
+import androidx.core.os.bundleOf
+import kotlinx.serialization.Serializable
+
+// НЕ ИЗМЕНЯЙТЕ ЭТОТ ФАЙЛ. В ТЕСТАХ ОН БУДЕМ ВОЗВРАЩЁН В ИСХОДНОЕ СОСТОЯНИЕ
+@Serializable
+data object QrScanDestination {
+    const val REQUEST_KEY = "qr_result"
+    private const val KEY_QR_DATA = "key_qr"
+
+    fun newInstance(): QrScanFragment {
+        return QrScanFragment()
+    }
+
+    fun getDataIfExist(bundle: Bundle): String? {
+        return if (bundle.containsKey(KEY_QR_DATA)) {
+            bundle.getString(KEY_QR_DATA)
+        } else {
+            null
+        }
+    }
+
+    internal fun packToBundle(data: String): Bundle {
+        return bundleOf(
+            KEY_QR_DATA to data
+        )
+    }
+}

app/src/main/java/ru/myitschool/work/ui/qr/scan/QrScanFragment.kt

@@ -0,0 +1,139 @@
+package ru.myitschool.work.ui.qr.scan
+
+import android.os.Bundle
+import android.view.View
+import androidx.activity.result.contract.ActivityResultContracts
+import androidx.camera.core.ImageAnalysis
+import androidx.camera.mlkit.vision.MlKitAnalyzer
+import androidx.camera.view.LifecycleCameraController
+import androidx.camera.view.PreviewView
+import androidx.core.content.ContextCompat
+import androidx.core.os.bundleOf
+import androidx.fragment.app.Fragment
+import androidx.fragment.app.setFragmentResult
+import androidx.fragment.app.viewModels
+import androidx.navigation.NavController
+import androidx.navigation.fragment.findNavController
+import com.google.mlkit.vision.barcode.BarcodeScanner
+import com.google.mlkit.vision.barcode.BarcodeScannerOptions
+import com.google.mlkit.vision.barcode.BarcodeScanning
+import com.google.mlkit.vision.barcode.common.Barcode
+import ru.myitschool.work.R
+import ru.myitschool.work.databinding.FragmentQrScanBinding
+import ru.myitschool.work.utils.collectWhenStarted
+import ru.myitschool.work.utils.visibleOrGone
+
+// НЕ ИЗМЕНЯЙТЕ ЭТОТ ФАЙЛ. В ТЕСТАХ ОН БУДЕМ ВОЗВРАЩЁН В ИСХОДНОЕ СОСТОЯНИЕ
+class QrScanFragment : Fragment(R.layout.fragment_qr_scan) {
+    private var _binding: FragmentQrScanBinding? = null
+    private val binding: FragmentQrScanBinding get() = _binding!!
+
+    private var barcodeScanner: BarcodeScanner? = null
+    private var isCameraInit: Boolean = false
+    private val permissionLauncher = registerForActivityResult(
+        ActivityResultContracts.RequestPermission()
+    ) { isGranted -> viewModel.onPermissionResult(isGranted) }
+
+    private val viewModel: QrScanViewModel by viewModels()
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        _binding = FragmentQrScanBinding.bind(view)
+        sendResult(bundleOf())
+        subscribe()
+        initCallback()
+    }
+
+    private fun initCallback() {
+        binding.close.setOnClickListener { viewModel.close() }
+    }
+
+    private fun subscribe() {
+        viewModel.state.collectWhenStarted(this) { state ->
+            binding.loading.visibleOrGone(state is QrScanViewModel.State.Loading)
+            binding.viewFinder.visibleOrGone(state is QrScanViewModel.State.Scan)
+            if (!isCameraInit && state is QrScanViewModel.State.Scan) {
+                startCamera()
+                isCameraInit = true
+            }
+        }
+
+        viewModel.action.collectWhenStarted(this) { action ->
+            when (action) {
+                is QrScanViewModel.Action.RequestPermission -> requestPermission(action.permission)
+                is QrScanViewModel.Action.CloseWithCancel -> {
+                    goBack()
+                }
+                is QrScanViewModel.Action.CloseWithResult -> {
+                    sendResult(QrScanDestination.packToBundle(action.result))
+                    goBack()
+                }
+            }
+        }
+    }
+
+    private fun requestPermission(permission: String) {
+        permissionLauncher.launch(permission)
+    }
+
+    private fun startCamera() {
+        val context = requireContext()
+        val cameraController = LifecycleCameraController(context)
+        val previewView: PreviewView = binding.viewFinder
+        val executor = ContextCompat.getMainExecutor(context)
+
+        val options = BarcodeScannerOptions.Builder()
+            .setBarcodeFormats(Barcode.FORMAT_QR_CODE)
+            .build()
+        val barcodeScanner = BarcodeScanning.getClient(options)
+        this.barcodeScanner = barcodeScanner
+
+        cameraController.setImageAnalysisAnalyzer(
+            executor,
+            MlKitAnalyzer(
+                listOf(barcodeScanner),
+                ImageAnalysis.COORDINATE_SYSTEM_VIEW_REFERENCED,
+                executor
+            ) { result ->
+                result?.getValue(barcodeScanner)?.firstOrNull()?.let { value ->
+                    viewModel.findBarcode(value)
+
+                }
+            }
+        )
+
+        cameraController.bindToLifecycle(this)
+        previewView.controller = cameraController
+    }
+
+    override fun onDestroyView() {
+        barcodeScanner?.close()
+        barcodeScanner = null
+        _binding = null
+        super.onDestroyView()
+    }
+
+    private fun goBack() {
+        findNavControllerOrNull()?.popBackStack()
+            ?: requireActivity().onBackPressedDispatcher.onBackPressed()
+    }
+
+    private fun sendResult(bundle: Bundle) {
+        setFragmentResult(
+            QrScanDestination.REQUEST_KEY,
+            bundle
+        )
+        findNavControllerOrNull()
+            ?.previousBackStackEntry
+            ?.savedStateHandle
+            ?.set(QrScanDestination.REQUEST_KEY, bundle)
+    }
+
+    private fun findNavControllerOrNull(): NavController? {
+        return try {
+            findNavController()
+        } catch (_: Throwable) {
+            null
+        }
+    }
+}

app/src/main/java/ru/myitschool/work/ui/qr/scan/QrScanViewModel.kt

@@ -0,0 +1,93 @@
+package ru.myitschool.work.ui.qr.scan
+
+import android.Manifest
+import android.app.Application
+import android.content.pm.PackageManager
+import androidx.core.content.ContextCompat
+import androidx.lifecycle.AndroidViewModel
+import androidx.lifecycle.viewModelScope
+import com.google.mlkit.vision.barcode.common.Barcode
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.asSharedFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.update
+import kotlinx.coroutines.launch
+import ru.myitschool.work.utils.MutablePublishFlow
+
+// НЕ ИЗМЕНЯЙТЕ ЭТОТ ФАЙЛ. В ТЕСТАХ ОН БУДЕМ ВОЗВРАЩЁН В ИСХОДНОЕ СОСТОЯНИЕ
+class QrScanViewModel(
+    application: Application
+) : AndroidViewModel(application) {
+
+    private val _action = MutablePublishFlow<Action>()
+    val action = _action.asSharedFlow()
+
+    private val _state = MutableStateFlow<State>(initialState)
+    val state = _state.asStateFlow()
+
+    init {
+        checkPermission()
+    }
+
+    fun onPermissionResult(isGranted: Boolean) {
+        viewModelScope.launch {
+            if (isGranted) {
+                _state.update { State.Scan }
+            } else {
+                _action.emit(Action.CloseWithCancel)
+            }
+        }
+    }
+
+    private fun checkPermission() {
+        viewModelScope.launch {
+            val isPermissionGranted = ContextCompat.checkSelfPermission(
+                getApplication(),
+                CAMERA_PERMISSION
+            ) == PackageManager.PERMISSION_GRANTED
+            if (isPermissionGranted) {
+                _state.update { State.Scan }
+            } else {
+                delay(1000)
+                _action.emit(Action.RequestPermission(CAMERA_PERMISSION))
+            }
+        }
+    }
+
+    fun findBarcode(barcode: Barcode) {
+        viewModelScope.launch {
+            barcode.rawValue?.let { value ->
+                _action.emit(Action.CloseWithResult(value))
+            }
+        }
+    }
+
+    fun close() {
+        viewModelScope.launch {
+            _action.emit(Action.CloseWithCancel)
+        }
+    }
+
+    sealed interface State {
+        data object Loading : State
+
+        data object Scan : State
+    }
+
+    sealed interface Action {
+        data class RequestPermission(
+            val permission: String
+        ) : Action
+        data object CloseWithCancel : Action
+        data class CloseWithResult(
+            val result: String
+        ) : Action
+    }
+
+    private companion object {
+        val initialState = State.Loading
+
+        const val CAMERA_PERMISSION = Manifest.permission.CAMERA
+    }
+}

app/src/main/java/ru/myitschool/work/utils/FlowExtensions.kt

@@ -0,0 +1,10 @@
+package ru.myitschool.work.utils
+
+import kotlinx.coroutines.channels.BufferOverflow
+import kotlinx.coroutines.flow.MutableSharedFlow
+
+fun <T> MutablePublishFlow() = MutableSharedFlow<T>(
+    replay = 0,
+    extraBufferCapacity = 1,
+    BufferOverflow.DROP_OLDEST
+)

app/src/main/java/ru/myitschool/work/utils/FragmentExtesions.kt

@@ -0,0 +1,18 @@
+package ru.myitschool.work.utils
+
+import androidx.fragment.app.Fragment
+import androidx.lifecycle.flowWithLifecycle
+import androidx.lifecycle.lifecycleScope
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.launch
+
+inline fun <T> Flow<T>.collectWhenStarted(
+    fragment: Fragment,
+    crossinline collector: (T) -> Unit
+) {
+    fragment.viewLifecycleOwner.lifecycleScope.launch {
+        flowWithLifecycle(fragment.viewLifecycleOwner.lifecycle).collect { value ->
+            collector.invoke(value)
+        }
+    }
+}

app/src/main/java/ru/myitschool/work/utils/TextChangedListener.kt

@@ -0,0 +1,12 @@
+package ru.myitschool.work.utils
+
+import android.text.Editable
+import android.text.TextWatcher
+
+open class TextChangedListener: TextWatcher {
+    override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) = Unit
+
+    override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) = Unit
+
+    override fun afterTextChanged(s: Editable?) = Unit
+}

app/src/main/java/ru/myitschool/work/utils/ViewExtensions.kt

@@ -0,0 +1,7 @@
+package ru.myitschool.work.utils
+
+import android.view.View
+
+fun View.visibleOrGone(isVisible: Boolean) {
+    this.visibility = if (isVisible) View.VISIBLE else View.GONE
+}

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

@@ -0,0 +1,5 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:height="24dp" android:tint="#000000" android:viewportHeight="24" android:viewportWidth="24" android:width="24dp">
+      
+    <path android:fillColor="@android:color/white" android:pathData="M19,6.41L17.59,5 12,10.59 6.41,5 5,6.41 10.59,12 5,17.59 6.41,19 12,13.41 17.59,19 19,17.59 13.41,12z"/>
+    
+</vector>

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

@@ -0,0 +1,5 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:autoMirrored="true" android:height="24dp" android:tint="#000000" android:viewportHeight="24" android:viewportWidth="24" android:width="24dp">
+      
+    <path android:fillColor="@android:color/white" android:pathData="M17,7l-1.41,1.41L18.17,11H8v2h10.17l-2.58,2.58L17,17l5,-5zM4,5h8V3H4c-1.1,0 -2,0.9 -2,2v14c0,1.1 0.9,2 2,2h8v-2H4V5z"/>
+    
+</vector>

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

@@ -0,0 +1,5 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:height="24dp" android:tint="#000000" android:viewportHeight="24" android:viewportWidth="24" android:width="24dp">
+      
+    <path android:fillColor="@android:color/white" android:pathData="M21.9,21.9l-8.49,-8.49l0,0L3.59,3.59l0,0L2.1,2.1L0.69,3.51L3,5.83V19c0,1.1 0.9,2 2,2h13.17l2.31,2.31L21.9,21.9zM5,18l3.5,-4.5l2.5,3.01L12.17,15l3,3H5zM21,18.17L5.83,3H19c1.1,0 2,0.9 2,2V18.17z"/>
+    
+</vector>

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

@@ -0,0 +1,25 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:height="24dp" android:tint="#000000" android:viewportHeight="24" android:viewportWidth="24" android:width="24dp">
+      
+    <path android:fillColor="@android:color/white" android:pathData="M3,11h8V3H3V11zM5,5h4v4H5V5z"/>
+      
+    <path android:fillColor="@android:color/white" android:pathData="M3,21h8v-8H3V21zM5,15h4v4H5V15z"/>
+      
+    <path android:fillColor="@android:color/white" android:pathData="M13,3v8h8V3H13zM19,9h-4V5h4V9z"/>
+      
+    <path android:fillColor="@android:color/white" android:pathData="M19,19h2v2h-2z"/>
+      
+    <path android:fillColor="@android:color/white" android:pathData="M13,13h2v2h-2z"/>
+      
+    <path android:fillColor="@android:color/white" android:pathData="M15,15h2v2h-2z"/>
+      
+    <path android:fillColor="@android:color/white" android:pathData="M13,17h2v2h-2z"/>
+      
+    <path android:fillColor="@android:color/white" android:pathData="M15,19h2v2h-2z"/>
+      
+    <path android:fillColor="@android:color/white" android:pathData="M17,17h2v2h-2z"/>
+      
+    <path android:fillColor="@android:color/white" android:pathData="M17,13h2v2h-2z"/>
+      
+    <path android:fillColor="@android:color/white" android:pathData="M19,15h2v2h-2z"/>
+    
+</vector>

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

@@ -0,0 +1,5 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:height="24dp" android:tint="#000000" android:viewportHeight="24" android:viewportWidth="24" android:width="24dp">
+      
+    <path android:fillColor="@android:color/white" android:pathData="M17.65,6.35C16.2,4.9 14.21,4 12,4c-4.42,0 -7.99,3.58 -7.99,8s3.57,8 7.99,8c3.73,0 6.84,-2.55 7.73,-6h-2.08c-0.82,2.33 -3.04,4 -5.65,4 -3.31,0 -6,-2.69 -6,-6s2.69,-6 6,-6c1.66,0 3.14,0.69 4.22,1.78L13,11h7V4l-2.35,2.35z"/>
+    
+</vector>

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

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout 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">
+
+    <androidx.fragment.app.FragmentContainerView
+        android:id="@+id/nav_host_fragment"
+        android:name="androidx.navigation.fragment.NavHostFragment"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        app:defaultNavHost="true" />
+</FrameLayout>

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

@@ -0,0 +1,16 @@
+<?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">
+
+    <ProgressBar
+        android:id="@+id/loading"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintBottom_toBottomOf="parent" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -0,0 +1,35 @@
+<?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">
+
+    <androidx.camera.view.PreviewView
+        android:id="@+id/viewFinder"
+        android:layout_width="0dp"
+        android:layout_height="0dp"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <ProgressBar
+        android:id="@+id/loading"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <com.google.android.material.floatingactionbutton.FloatingActionButton
+        android:id="@+id/close"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_margin="16dp"
+        android:contentDescription="@string/close_button"
+        android:src="@drawable/ic_close"
+        app:elevation="0dp"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+</androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <item name="rootContainer" type="id"/>
+</resources>

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

@@ -1,3 +1,3 @@
 <resources>
-    <string name="app_name">Work</string>
+    <string name="app_name">NTO Pass</string>
 </resources>

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

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="close_button">Close</string>
+</resources>

build.gradle.kts

@@ -2,4 +2,5 @@
 plugins {
     androidApplication version Version.agp apply false
     kotlinJvm version Version.Kotlin.language apply false
+    id("com.google.dagger.hilt.android") version "2.51.1" apply false
 }