back button xml added

NoteApplication/.idea/misc.xml

@@ -54,6 +54,7 @@
         <entry key="app/src/main/res/layout/add_note.xml" value="0.335" />
         <entry key="app/src/main/res/layout/add_tag.xml" value="0.25" />
         <entry key="app/src/main/res/layout/addnoteactivity.xml" value="0.3162037037037037" />
+        <entry key="app/src/main/res/layout/bottom_sheet_new_folder.xml" value="0.14947916666666666" />
         <entry key="app/src/main/res/layout/class_managment.xml" value="0.1" />
         <entry key="app/src/main/res/layout/course_item.xml" value="0.335" />
         <entry key="app/src/main/res/layout/note_item.xml" value="0.3428981348637016" />
@@ -62,6 +63,7 @@
         <entry key="app/src/main/res/layout/open_notes.xml" value="0.1390625" />
         <entry key="app/src/main/res/layout/read_note.xml" value="0.3641547238346506" />
         <entry key="app/src/main/res/layout/tag_item.xml" value="0.335" />
+        <entry key="app/src/main/res/layout/tag_list.xml" value="0.14947916666666666" />
         <entry key="app/src/main/res/layout/tool_bar.xml" value="0.335" />
         <entry key="app/src/main/res/layout/tool_bar_course.xml" value="0.25" />
         <entry key="app/src/main/res/layout/toolbar.xml" value="0.1171875" />

NoteApplication/app/src/main/res/drawable/ic_baseline_arrow_back_ios_24.xml

+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24"
+    android:tint="?attr/colorControlNormal"
+    android:autoMirrored="true">
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M11.67,3.87L9.9,2.1 0,12l9.9,9.9 1.77,-1.77L3.54,12z"/>
+</vector>

NoteApplication/app/src/main/res/layout/activity_folder.xml

@@ -7,15 +7,33 @@
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         tools:context=".MainActivity">
-    <TextView
+    <androidx.constraintlayout.widget.ConstraintLayout
             android:layout_width="match_parent"
-            android:layout_height="56dp"
-            android:id="@+id/title"
-            android:text="NOTE"
-            android:textSize="30sp"
-            android:gravity="center"
-            android:textColor="@color/black"
-            android:textStyle="bold"/>
+            android:layout_height="wrap_content"
+            android:id="@+id/title_layout"
+    >
+        <ImageButton
+                app:layout_constraintStart_toStartOf="parent"
+                app:layout_constraintTop_toTopOf="parent"
+                app:layout_constraintBottom_toBottomOf="parent"
+                android:src="@drawable/ic_baseline_arrow_back_ios_24"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:backgroundTint="@color/colorPrimary"/>
+        <TextView
+                app:layout_constraintTop_toTopOf="parent"
+                app:layout_constraintStart_toStartOf="parent"
+                app:layout_constraintEnd_toEndOf="parent"
+                android:layout_width="match_parent"
+                android:layout_height="56dp"
+                android:id="@+id/title"
+                android:text="NOTE"
+                android:textSize="30sp"
+                android:gravity="center"
+                android:textColor="@color/black"
+                android:textStyle="bold"/>
+
+    </androidx.constraintlayout.widget.ConstraintLayout>
     <LinearLayout
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
@@ -23,7 +41,7 @@
             android:id="@+id/tool_bar_linear"
             android:layout_margin="8dp"
             android:paddingHorizontal="4dp"
-            android:layout_below="@id/title">
+            android:layout_below="@id/title_layout">
         <include layout="@layout/tool_bar"
                  android:id="@+id/tool_bar"
         />
@@ -34,9 +52,9 @@
             android:layout_height="wrap_content"
             android:layout_below="@id/tool_bar_linear"
             android:id="@+id/tag_list"
-            android:layout_margin="8dp"
             layout="@layout/tag_list"
-    />
+            android:layout_marginTop="8dp" android:layout_marginStart="8dp" android:layout_marginEnd="8dp"
+            android:layout_marginBottom="8dp"/>
 
     <androidx.recyclerview.widget.RecyclerView
             android:layout_width="match_parent"
@@ -44,9 +62,9 @@
             android:id="@+id/note_list"
             android:layout_below="@id/tag_list"
             tools:listitem="@layout/note_item"
-            android:layout_margin="8dp"
             app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
-    />
+            android:layout_marginTop="8dp" android:layout_marginStart="8dp" android:layout_marginEnd="8dp"
+            android:layout_marginBottom="8dp"/>
 
     <com.google.android.material.floatingactionbutton.FloatingActionButton
             android:layout_width="wrap_content"