...

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

@@ -0,0 +1,23 @@
+<?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=".ui.kueche.KuecheFragment">
+
+    <ImageView
+        android:id="@+id/Background"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:scaleType="centerCrop"
+        android:src="@drawable/background"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.5"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintVertical_bias="0.0" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>

build.gradle

@@ -3,6 +3,7 @@ buildscript {
     repositories {
         google()
         mavenCentral()
+        maven { url 'https://maven.google.com/' }
     }
     dependencies {
         classpath 'com.android.tools.build:gradle:4.2.1'
@@ -16,6 +17,7 @@ allprojects {
     repositories {
         google()
         mavenCentral()
+        maven { url 'https://maven.google.com/' }
     }
 }