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private fun updateTransform() {
    val matrix = Matrix()

    // Compute the center of the view finder
    val centerX = viewFinder.width / 2f
    val centerY = viewFinder.height / 2f

    // Correct preview output to account for display rotation
    val rotationDegrees = when(viewFinder.display.rotation) {
        Surface.ROTATION_0 -> 0

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private fun startCamera() {

    // Create configuration object for the viewfinder use case
    val previewConfig = PreviewConfig.Builder().apply {
        setTargetAspectRatio(Rational(1, 1))
        setTargetResolution(Size(640, 640))
    }.build()

    // Build the viewfinder use case
    val preview = Preview(previewConfig)

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override fun onCreate(savedInstanceState: Bundle?) {
    ...

    // Add this at the end of onCreate function

    viewFinder = findViewById(R.id.view_finder)

    // Request camera permissions
    if (allPermissionsGranted()) {
        viewFinder.post { startCamera() }

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class MainActivity : AppCompatActivity(), LifecycleOwner {

    override fun onCreate(savedInstanceState: Bundle?) {
        ...
    }

    // Add this after onCreate

    private lateinit var viewFinder: TextureView

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// Your IDE likely can auto-import these classes, but there are several
// different implementations so we list them here to disambiguate
import android.Manifest
import android.util.Size
import android.graphics.Matrix
import java.util.concurrent.TimeUnit

// This is an arbitrary number we are using to keep tab of the permission
// request. Where an app has multiple context for requesting permission,
// this can help differentiate the different contexts

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<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:context=".MainActivity">

    <TextureView

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<vector xmlns:android="http://schemas.android.com/apk/res/android"
        android:width="24dp"
        android:height="24dp"
        android:viewportWidth="24.0"
        android:viewportHeight="24.0">
    <path
        android:fillColor="?android:colorControlNormal"
        android:pathData="M16.5,3c-1.74,0 -3.41,0.81 -4.5,2.09C10.91,3.81 9.24,3 7.5,3 4.42,3 2,5.42 2,8.5c0,3.78 3.4,6.86 8.55,11.54L12,21.35l1.45,-1.32C18.6,15.36 22,12.28 22,8.5 22,5.42 19.58,3 16.5,3zM12.1,18.55l-0.1,0.1 -0.1,-0.1C7.14,14.24 4,11.39 4,8.5 4,6.5 5.5,5 7.5,5c1.54,0 3.04,0.99 3.57,2.36h1.87C13.46,5.99 14.96,5 16.5,5c2,0 3.5,1.5 3.5,3.5 0,2.89 -3.14,5.74 -7.9,10.05z"/>
</vector>

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<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    package="com.example.com">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher"

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<resources>

    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
        <!-- Customize your theme here. -->
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>
    </style>
    

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 private fun addQuotations(orderId: String){
        var docRef : DocumentReference = FirebaseFirestore.getInstance().collection("orders").document(orderId)
        var newQuotation = RetailerQuotationItem("retailer4","Retailer THree","",790.0,
            SharedPreferencesDB.getSavedAddress(activity)!!,4.6)

        docRef.update("quotations",FieldValue.arrayRemove(newQuotation))
    }