initial android app setup, adds fragments, camera

- scans in camera view for qr code
- camera view inside fragment
- fragment 1 passed to camera fragment
- prints qr code to log

app/src/androidTest/java/com/example/bump/ExampleInstrumentedTest.kt

@@ -0,0 +1,24 @@
+package com.example.bump
+
+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("com.example.bump", appContext.packageName)
+    }
+}

app/src/main/AndroidManifest.xml

@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.example.bump">
+
+    <uses-feature android:name="android.hardware.camera.any" />
+    <uses-permission android:name="android.permission.CAMERA" />
+
+    <application
+        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.BumpForAndroid">
+        <activity
+            android:name=".MainActivity"
+            android:exported="true"
+            android:label="@string/app_name"
+            android:theme="@style/Theme.BumpForAndroid.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/com/example/bump/CameraFragment.kt

@@ -0,0 +1,244 @@
+package com.example.bump
+
+import android.Manifest
+import android.annotation.SuppressLint
+import android.content.pm.PackageManager
+import android.os.Build
+import android.os.Bundle
+import android.util.DisplayMetrics
+import android.util.Log
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.camera.core.*
+import androidx.camera.lifecycle.ProcessCameraProvider
+import androidx.camera.view.PreviewView
+import androidx.core.app.ActivityCompat
+import androidx.core.content.ContextCompat
+import androidx.fragment.app.Fragment
+import androidx.lifecycle.ViewModelProvider
+import com.example.bump.databinding.FragmentSecondBinding
+import com.google.mlkit.vision.barcode.Barcode
+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.common.InputImage
+import java.util.concurrent.Executors
+import kotlin.IllegalStateException
+import kotlin.math.abs
+import kotlin.math.max
+import kotlin.math.min
+import android.view.WindowInsets
+
+import android.graphics.Insets
+
+
+
+
+
+class CameraFragment: Fragment() {
+
+    private var previewView: PreviewView? = null
+    private var cameraProvider: ProcessCameraProvider? = null
+    private var cameraSelector: CameraSelector? = null
+    private var lensFacing = CameraSelector.LENS_FACING_BACK
+    private var previewUseCase: Preview? = null
+    private var analysisUseCase: ImageAnalysis? = null
+
+    private var _binding: FragmentSecondBinding? = null
+    private val binding get() = _binding!!
+
+    private val screenAspectRatio: Int
+    get() {
+        val activity = requireActivity()
+        return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
+            val windowMetrics = activity.windowManager.currentWindowMetrics
+            val insets: Insets = windowMetrics.windowInsets
+                .getInsetsIgnoringVisibility(WindowInsets.Type.systemBars())
+            windowMetrics.bounds.width() - insets.left - insets.right
+        } else {
+            val displayMetrics = DisplayMetrics()
+            activity.windowManager.defaultDisplay.getMetrics(displayMetrics)
+            return aspectRatio(displayMetrics.widthPixels, displayMetrics.heightPixels)
+        }
+    }
+
+    override fun onCreateView(
+        inflater: LayoutInflater, container: ViewGroup?,
+        savednstanceState: Bundle?
+    ): View {
+
+        _binding = FragmentSecondBinding.inflate(inflater, container, false)
+        setupCamera()
+        return binding.root
+    }
+
+    private fun setupCamera() {
+        previewView = binding.viewFinder
+        cameraSelector = CameraSelector.Builder().requireLensFacing(lensFacing).build()
+        ViewModelProvider(
+            this, ViewModelProvider.AndroidViewModelFactory.getInstance(super.requireActivity().application)
+        ).get(CameraXViewModel::class.java)
+            .processCameraProvider
+            .observe(this.viewLifecycleOwner) { provider: ProcessCameraProvider? ->
+                cameraProvider = provider
+                if (isCameraPermissionGranted()) {
+                    bindCameraUseCases()
+                } else {
+                    ActivityCompat.requestPermissions(
+                        super.requireActivity(),
+                        arrayOf(Manifest.permission.CAMERA),
+                        PERMISSION_CAMERA_REQUEST
+                    )
+                }
+            }
+    }
+
+    private fun bindCameraUseCases() {
+        bindPreviewUseCase()
+        bindAnalyseUseCase()
+    }
+
+    private fun bindPreviewUseCase() {
+        if (cameraProvider == null) {
+            return
+        }
+        if (previewUseCase != null) {
+            cameraProvider!!.unbind(previewUseCase)
+        }
+
+        previewUseCase = Preview.Builder()
+            .setTargetAspectRatio(screenAspectRatio)
+            .setTargetRotation(previewView!!.display.rotation)
+            .build()
+        previewUseCase!!.setSurfaceProvider(previewView!!.surfaceProvider)
+
+        try {
+            cameraProvider!!.bindToLifecycle(
+                /* lifecycleOwner= */this,
+                cameraSelector!!,
+                previewUseCase
+            )
+        } catch (illegalStateException: IllegalStateException) {
+            Log.e(TAG, illegalStateException.message ?: "IllegalStateException")
+        } catch (illegalArgumentException: IllegalArgumentException) {
+            Log.e(TAG, illegalArgumentException.message ?: "IllegalArgumentException")
+        }
+    }
+
+    private fun bindAnalyseUseCase() {
+        // Note that if you know which format of barcode your app is dealing with, detection will be
+        // faster to specify the supported barcode formats one by one, e.g.
+        val bsc = BarcodeScannerOptions.Builder()
+            .setBarcodeFormats(Barcode.FORMAT_QR_CODE)
+            .build()
+        val barcodeScanner: BarcodeScanner = BarcodeScanning.getClient(bsc)
+
+        if (cameraProvider == null) {
+            return
+        }
+        if (analysisUseCase != null) {
+            cameraProvider!!.unbind(analysisUseCase)
+        }
+
+        analysisUseCase = ImageAnalysis.Builder()
+            .setTargetAspectRatio(screenAspectRatio)
+            .setTargetRotation(previewView!!.display.rotation)
+            .build()
+
+        // Initialize our background executor
+        val cameraExecutor = Executors.newSingleThreadExecutor()
+
+        analysisUseCase?.setAnalyzer(
+            cameraExecutor,
+            { imageProxy ->
+                processImageProxy(barcodeScanner, imageProxy)
+            }
+        )
+
+        try {
+            cameraProvider!!.bindToLifecycle(
+                /* lifecycleOwner= */this,
+                cameraSelector!!,
+                analysisUseCase
+            )
+        } catch (illegalStateException: IllegalStateException) {
+            Log.e(TAG, illegalStateException.message ?: "IllegalStateException")
+        } catch (illegalArgumentException: IllegalArgumentException) {
+            Log.e(TAG, illegalArgumentException.message ?: "IllegalArgumentException")
+        }
+    }
+
+    @SuppressLint("UnsafeExperimentalUsageError", "UnsafeOptInUsageError")
+    private fun processImageProxy(
+        barcodeScanner: BarcodeScanner,
+        imageProxy: ImageProxy
+    ) {
+        val inputImage =
+            InputImage.fromMediaImage(imageProxy.image!!, imageProxy.imageInfo.rotationDegrees)
+
+        barcodeScanner.process(inputImage)
+            .addOnSuccessListener { barcodes ->
+                barcodes.forEach {
+                    Log.d(TAG, it.rawValue!!)
+                }
+            }
+            .addOnFailureListener {
+                Log.e(TAG, it.message ?: it.toString())
+            }.addOnCompleteListener {
+                // When the image is from CameraX analysis use case, must call image.close() on received
+                // images when finished using them. Otherwise, new images may not be received or the camera
+                // may stall.
+                imageProxy.close()
+            }
+    }
+
+    /**
+     *  [androidx.camera.core.ImageAnalysis], [androidx.camera.core.Preview] requires enum value of
+     *  [androidx.camera.core.AspectRatio]. Currently it has values of 4:3 & 16:9.
+     *
+     *  Detecting the most suitable ratio for dimensions provided in @params by counting absolute
+     *  of preview ratio to one of the provided values.
+     *
+     *  @param width - preview width
+     *  @param height - preview height
+     *  @return suitable aspect ratio
+     */
+    private fun aspectRatio(width: Int, height: Int): Int {
+        val previewRatio = max(width, height).toDouble() / min(width, height)
+        if (abs(previewRatio - RATIO_4_3_VALUE) <= abs(previewRatio - RATIO_16_9_VALUE)) {
+            return AspectRatio.RATIO_4_3
+        }
+        return AspectRatio.RATIO_16_9
+    }
+
+    override fun onRequestPermissionsResult(
+        requestCode: Int,
+        permissions: Array<String>,
+        grantResults: IntArray
+    ) {
+        if (requestCode == PERMISSION_CAMERA_REQUEST) {
+            if (isCameraPermissionGranted()) {
+                bindCameraUseCases()
+            } else {
+                Log.e(TAG, "no camera permission")
+            }
+        }
+        super.onRequestPermissionsResult(requestCode, permissions, grantResults)
+    }
+
+    private fun isCameraPermissionGranted(): Boolean {
+        return ContextCompat.checkSelfPermission(
+            requireContext(),
+            Manifest.permission.CAMERA
+        ) == PackageManager.PERMISSION_GRANTED
+    }
+
+    companion object {
+        private val TAG = MainActivity::class.java.simpleName
+        private const val PERMISSION_CAMERA_REQUEST = 1
+
+        private const val RATIO_4_3_VALUE = 4.0 / 3.0
+        private const val RATIO_16_9_VALUE = 16.0 / 9.0
+    }
+}

app/src/main/java/com/example/bump/CameraXViewModel.kt

@@ -0,0 +1,48 @@
+package com.example.bump
+
+import android.app.Application
+import android.util.Log
+import androidx.camera.lifecycle.ProcessCameraProvider
+import androidx.core.content.ContextCompat
+import androidx.lifecycle.AndroidViewModel
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.MutableLiveData
+import java.util.concurrent.ExecutionException
+
+/**
+ * View model for interacting with CameraX.
+ * Create an instance which interacts with the camera service via the given application context.
+ */
+class CameraXViewModel(application: Application) : AndroidViewModel(application) {
+    private var cameraProviderLiveData: MutableLiveData<ProcessCameraProvider>? = null
+
+    // Handle any errors (including cancellation) here.
+    val processCameraProvider: LiveData<ProcessCameraProvider>
+        get() {
+            if (cameraProviderLiveData == null) {
+                cameraProviderLiveData = MutableLiveData()
+                val cameraProviderFuture =
+                    ProcessCameraProvider.getInstance(getApplication())
+                cameraProviderFuture.addListener(
+                    {
+                        try {
+                            cameraProviderLiveData!!.setValue(cameraProviderFuture.get())
+                        } catch (e: ExecutionException) {
+                            // Handle any errors (including cancellation) here.
+                            Log.e(TAG, "Unhandled exception", e)
+                        } catch (e: InterruptedException) {
+                            Log.e(TAG, "Unhandled exception", e)
+                        }
+                    },
+                    ContextCompat.getMainExecutor(getApplication())
+                )
+            }
+            return cameraProviderLiveData!!
+        }
+
+
+
+    companion object {
+        private const val TAG = "CameraXViewModel"
+    }
+}

app/src/main/java/com/example/bump/FirstFragment.kt

@@ -0,0 +1,44 @@
+package com.example.bump
+
+import android.os.Bundle
+import androidx.fragment.app.Fragment
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.navigation.fragment.findNavController
+import com.example.bump.databinding.FragmentFirstBinding
+
+/**
+ * A simple [Fragment] subclass as the default destination in the navigation.
+ */
+class FirstFragment : Fragment() {
+
+    private var _binding: FragmentFirstBinding? = null
+
+    // This property is only valid between onCreateView and
+    // onDestroyView.
+    private val binding get() = _binding!!
+
+    override fun onCreateView(
+            inflater: LayoutInflater, container: ViewGroup?,
+            savedInstanceState: Bundle?
+    ): View? {
+
+        _binding = FragmentFirstBinding.inflate(inflater, container, false)
+        return binding.root
+
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+
+        binding.buttonFirst.setOnClickListener {
+            findNavController().navigate(R.id.action_FirstFragment_to_SecondFragment)
+        }
+    }
+
+    override fun onDestroyView() {
+        super.onDestroyView()
+        _binding = null
+    }
+}

app/src/main/java/com/example/bump/MainActivity.kt

@@ -0,0 +1,58 @@
+package com.example.bump
+
+import android.os.Bundle
+import com.google.android.material.snackbar.Snackbar
+import androidx.appcompat.app.AppCompatActivity
+import androidx.navigation.findNavController
+import androidx.navigation.ui.AppBarConfiguration
+import androidx.navigation.ui.navigateUp
+import androidx.navigation.ui.setupActionBarWithNavController
+import android.view.Menu
+import android.view.MenuItem
+import com.example.bump.databinding.ActivityMainBinding
+
+class MainActivity : AppCompatActivity() {
+
+    private lateinit var appBarConfiguration: AppBarConfiguration
+    private lateinit var binding: ActivityMainBinding
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        binding = ActivityMainBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+
+        setSupportActionBar(binding.toolbar)
+
+        val navController = findNavController(R.id.nav_host_fragment_content_main)
+        appBarConfiguration = AppBarConfiguration(navController.graph)
+        setupActionBarWithNavController(navController, appBarConfiguration)
+
+        binding.fab.setOnClickListener { view ->
+            Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
+                .setAction("Action", null).show()
+        }
+    }
+
+    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 {
+        // Handle action bar item clicks here. The action bar will
+        // automatically handle clicks on the Home/Up button, so long
+        // as you specify a parent activity in AndroidManifest.xml.
+        return when (item.itemId) {
+            R.id.action_settings -> true
+            else -> super.onOptionsItemSelected(item)
+        }
+    }
+
+    override fun onSupportNavigateUp(): Boolean {
+        val navController = findNavController(R.id.nav_host_fragment_content_main)
+        return navController.navigateUp(appBarConfiguration)
+                || super.onSupportNavigateUp()
+    }
+}

app/src/main/java/com/example/bump/SecondFragment.kt

@@ -0,0 +1,45 @@
+package com.example.bump
+
+import android.os.Bundle
+import androidx.fragment.app.Fragment
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.navigation.fragment.findNavController
+import com.example.bump.databinding.FragmentSecondBinding
+
+/**
+ * A simple [Fragment] subclass as the second destination in the navigation.
+ */
+class SecondFragment : Fragment() {
+
+    private var _binding: FragmentSecondBinding? = null
+
+    // This property is only valid between onCreateView and
+    // onDestroyView.
+    private val binding get() = _binding!!
+
+    override fun onCreateView(
+        inflater: LayoutInflater, container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+
+        _binding = FragmentSecondBinding.inflate(inflater, container, false)
+        return binding.root
+
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+
+        binding.viewFinder
+        binding.viewFinder.bitmap
+
+    }
+
+
+    override fun onDestroyView() {
+        super.onDestroyView()
+        _binding = null
+    }
+}

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

@@ -0,0 +1,30 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:aapt="http://schemas.android.com/aapt"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path android:pathData="M31,63.928c0,0 6.4,-11 12.1,-13.1c7.2,-2.6 26,-1.4 26,-1.4l38.1,38.1L107,108.928l-32,-1L31,63.928z">
+        <aapt:attr name="android:fillColor">
+            <gradient
+                android:endX="85.84757"
+                android:endY="92.4963"
+                android:startX="42.9492"
+                android:startY="49.59793"
+                android:type="linear">
+                <item
+                    android:color="#44000000"
+                    android:offset="0.0" />
+                <item
+                    android:color="#00000000"
+                    android:offset="1.0" />
+            </gradient>
+        </aapt:attr>
+    </path>
+    <path
+        android:fillColor="#FFFFFF"
+        android:fillType="nonZero"
+        android:pathData="M65.3,45.828l3.8,-6.6c0.2,-0.4 0.1,-0.9 -0.3,-1.1c-0.4,-0.2 -0.9,-0.1 -1.1,0.3l-3.9,6.7c-6.3,-2.8 -13.4,-2.8 -19.7,0l-3.9,-6.7c-0.2,-0.4 -0.7,-0.5 -1.1,-0.3C38.8,38.328 38.7,38.828 38.9,39.228l3.8,6.6C36.2,49.428 31.7,56.028 31,63.928h46C76.3,56.028 71.8,49.428 65.3,45.828zM43.4,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2c-0.3,-0.7 -0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C45.3,56.528 44.5,57.328 43.4,57.328L43.4,57.328zM64.6,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2s-0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C66.5,56.528 65.6,57.328 64.6,57.328L64.6,57.328z"
+        android:strokeWidth="1"
+        android:strokeColor="#00000000" />
+</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/layout/activity_main.xml

@@ -0,0 +1,34 @@
+<?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=".MainActivity">
+
+    <com.google.android.material.appbar.AppBarLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:theme="@style/Theme.BumpForAndroid.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.BumpForAndroid.PopupOverlay" />
+
+    </com.google.android.material.appbar.AppBarLayout>
+
+    <include layout="@layout/content_main" />
+
+    <com.google.android.material.floatingactionbutton.FloatingActionButton
+        android:id="@+id/fab"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="bottom|end"
+        android:layout_marginEnd="@dimen/fab_margin"
+        android:layout_marginBottom="16dp"
+        app:srcCompat="@android:drawable/ic_dialog_email" />
+
+</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">
+
+    <fragment
+        android:id="@+id/nav_host_fragment_content_main"
+        android:name="androidx.navigation.fragment.NavHostFragment"
+        android:layout_width="0dp"
+        android:layout_height="0dp"
+        app:defaultNavHost="true"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintRight_toRightOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:navGraph="@navigation/nav_graph" />
+</androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -0,0 +1,14 @@
+<?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"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".SecondFragment">
+
+    <androidx.camera.view.PreviewView
+        android:id="@+id/viewFinder"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -0,0 +1,28 @@
+<?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"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".FirstFragment">
+
+    <TextView
+        android:id="@+id/textview_first"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/current_sender"
+        app:layout_constraintBottom_toTopOf="@id/button_first"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <Button
+        android:id="@+id/button_first"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/scan_sender"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/textview_first" />
+</androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -0,0 +1,14 @@
+<?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"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".SecondFragment">
+
+    <androidx.camera.view.PreviewView
+        android:id="@+id/viewFinder"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -0,0 +1,10 @@
+<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="com.example.bump.MainActivity">
+    <item
+        android:id="@+id/action_settings"
+        android:orderInCategory="100"
+        android:title="@string/action_settings"
+        app:showAsAction="never" />
+</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="@drawable/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="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>

app/src/main/res/navigation/nav_graph.xml

@@ -0,0 +1,38 @@
+<?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/FirstFragment">
+
+    <fragment
+        android:id="@+id/FirstFragment"
+        android:name="com.example.bump.FirstFragment"
+        android:label="@string/first_fragment_label"
+        tools:layout="@layout/fragment_first">
+
+        <action
+            android:id="@+id/action_FirstFragment_to_SecondFragment"
+            app:destination="@id/CameraFragment" />
+    </fragment>
+    <fragment
+        android:id="@+id/SecondFragment"
+        android:name="com.example.bump.SecondFragment"
+        android:label="@string/second_fragment_label"
+        tools:layout="@layout/fragment_second">
+
+        <action
+            android:id="@+id/action_SecondFragment_to_FirstFragment"
+            app:destination="@id/FirstFragment" />
+    </fragment>
+    <fragment
+        android:id="@+id/CameraFragment"
+        android:name="com.example.bump.CameraFragment"
+        android:label="@string/camera_fragment_label"
+        tools:layout="@layout/fragment_camera">
+
+        <action
+            android:id="@+id/action_SecondFragment_to_FirstFragment"
+            app:destination="@id/FirstFragment" />
+    </fragment>
+</navigation>

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

@@ -0,0 +1,3 @@
+<resources>
+    <dimen name="fab_margin">48dp</dimen>
+</resources>

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.BumpForAndroid" 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-w1240dp/dimens.xml

@@ -0,0 +1,3 @@
+<resources>
+    <dimen name="fab_margin">200dp</dimen>
+</resources>

app/src/main/res/values-w600dp/dimens.xml

@@ -0,0 +1,3 @@
+<resources>
+    <dimen name="fab_margin">48dp</dimen>
+</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/strings.xml

@@ -0,0 +1,15 @@
+<resources>
+    <string name="app_name">Bump for Android</string>
+    <string name="action_settings">Settings</string>
+    <!-- Strings used for fragments for navigation -->
+    <string name="first_fragment_label">First Fragment</string>
+    <string name="second_fragment_label">Second Fragment</string>
+    <string name="next">Next</string>
+    <string name="previous">Previous</string>
+
+    <string name="hello_first_fragment">Hello first fragment</string>
+    <string name="hello_second_fragment">Hello second fragment. Arg: %1$s</string>
+    <string name="current_sender">No Sender Added</string>
+    <string name="scan_sender">Scan</string>
+    <string name="camera_fragment_label">Camera Fragment</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.BumpForAndroid" 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.BumpForAndroid.NoActionBar">
+        <item name="windowActionBar">false</item>
+        <item name="windowNoTitle">true</item>
+    </style>
+
+    <style name="Theme.BumpForAndroid.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />
+
+    <style name="Theme.BumpForAndroid.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />
+</resources>

app/src/test/java/com/example/bump/ExampleUnitTest.kt

@@ -0,0 +1,17 @@
+package com.example.bump
+
+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)
+    }
+}