Finally fixed background issue

app/src/main/java/com/paktalin/vocabularynotebook/ui/MainActivity.kt

@@ -44,7 +44,7 @@ class MainActivity : AppCompatActivity() {
     }
 
     private fun extractVocabularyData() {
-        val userId = FirebaseAuth.getInstance().currentUser!!.uid
+        val userId = FirebaseAuth.getInstance()!!.currentUser!!.uid
         val db = ConfiguredFirestore.instance
 
         val userDocument = db.collection("users").document(userId)

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

@@ -5,8 +5,6 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 
-    <include layout="@layout/img_background"/>
-
     <TextView
         android:id="@+id/etWord"
         android:layout_width="wrap_content"

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

@@ -4,7 +4,14 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    android:orientation="horizontal">
+    android:orientation="horizontal"
+    android:background="@drawable/line_background"
+    android:paddingLeft="16dp"
+    android:paddingStart="16dp"
+    android:paddingRight="16dp"
+    android:paddingEnd="16dp"
+    android:paddingTop="8dp"
+    android:paddingBottom="8dp">
 
     <EditText
         android:id="@+id/etWord"
@@ -35,7 +42,7 @@
         android:layout_width="0dp"
         android:layout_height="wrap_content"
         android:layout_weight="1"
-        android:visibility="invisible"
+        android:visibility="gone"
         android:background="@android:color/transparent"
         app:srcCompat="@drawable/ic_cancel_icon"
         tools:ignore="ContentDescription" />

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

-<?xml version="1.0" encoding="utf-8"?>
-<LinearLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:tools="http://schemas.android.com/tools"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent">
-
-    <ImageView
-        android:layout_width="match_parent"
-        android:layout_height="match_parent"
-        android:src="@drawable/notepad"
-        android:scaleType="fitXY"
-        tools:ignore="ContentDescription" />
-</LinearLayout>
\ No newline at end of file

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

 <?xml version="1.0" encoding="utf-8"?>
 <android.support.constraint.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">
 
@@ -46,7 +47,8 @@
             android:layout_marginEnd="8dp"
             android:layout_marginRight="8dp"
             android:background="@android:color/transparent"
-            app:srcCompat="@drawable/ic_done_icon" />
+            app:srcCompat="@drawable/ic_done_icon"
+            tools:ignore="ContentDescription" />
 
     </FrameLayout>
 

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

@@ -8,11 +8,13 @@
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:orientation="horizontal"
-    android:background="@drawable/one_item2"
-    android:paddingRight="32dp"
-    android:paddingLeft="56dp"
-    android:paddingEnd="32dp"
-    android:paddingStart="56dp">
+    android:paddingLeft="16dp"
+    android:paddingStart="16dp"
+    android:paddingRight="16dp"
+    android:paddingEnd="16dp"
+    android:paddingTop="8dp"
+    android:paddingBottom="8dp"
+    android:background="@drawable/line_background">
 
     <TextView
         android:id="@+id/etWord"