Android-Developer-Basic · Dmitry12363 · Jul 3, 2025
diff --git a/app/src/main/java/otus/gpb/homework/viewandresources/CartActivity.kt b/app/src/main/java/otus/gpb/homework/viewandresources/CartActivity.kt
@@ -1,11 +1,32 @@
 package otus.gpb.homework.viewandresources
 
-import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
+import androidx.appcompat.app.AppCompatActivity
+import androidx.recyclerview.widget.DividerItemDecoration
+import androidx.recyclerview.widget.LinearLayoutManager
+import androidx.recyclerview.widget.RecyclerView
+
 
 class CartActivity : AppCompatActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_cart)
+
+        val dataset = arrayOf("List item 1", "List item 2", "List item 3", "List item 4")
+        val customAdapter = CustomAdapter(dataset)
+
+        val recyclerView: RecyclerView = findViewById(R.id.recycler_view)
+        recyclerView.layoutManager = LinearLayoutManager(this)
+        recyclerView.adapter = customAdapter
+        val divider = DividerItemDecoration(
+            recyclerView.context,
+            DividerItemDecoration.VERTICAL
+        )
+        recyclerView.addItemDecoration(divider)
+        val appBar = findViewById<com.google.android.material.appbar.MaterialToolbar>(R.id.topAppBar)
+        appBar.setNavigationOnClickListener {
+            this.finish()
+        }
     }
+
 }
diff --git a/app/src/main/java/otus/gpb/homework/viewandresources/ContactsActivity.kt b/app/src/main/java/otus/gpb/homework/viewandresources/ContactsActivity.kt
@@ -7,5 +7,9 @@ class ContactsActivity : AppCompatActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_contacts)
+        val appBar = findViewById<com.google.android.material.appbar.MaterialToolbar>(R.id.topAppBar)
+        appBar.setNavigationOnClickListener {
+            this.finish()
+        }
     }
 }
diff --git a/app/src/main/java/otus/gpb/homework/viewandresources/CustomAdapter.kt b/app/src/main/java/otus/gpb/homework/viewandresources/CustomAdapter.kt
@@ -0,0 +1,45 @@
+package otus.gpb.homework.viewandresources
+
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.TextView
+import androidx.recyclerview.widget.RecyclerView
+
+class CustomAdapter(private val dataSet: Array<String>) :
+    RecyclerView.Adapter<CustomAdapter.ViewHolder>() {
+
+    /**
+     * Provide a reference to the type of views that you are using
+     * (custom ViewHolder)
+     */
+    class ViewHolder(view: View) : RecyclerView.ViewHolder(view) {
+        val textView: TextView
+
+        init {
+            // Define click listener for the ViewHolder's View
+            textView = view.findViewById(R.id.name)
+        }
+    }
+
+    // Create new views (invoked by the layout manager)
+    override fun onCreateViewHolder(viewGroup: ViewGroup, viewType: Int): ViewHolder {
+        // Create a new view, which defines the UI of the list item
+        val view = LayoutInflater.from(viewGroup.context)
+            .inflate(R.layout.text_row_item, viewGroup, false)
+
+        return ViewHolder(view)
+    }
+
+    // Replace the contents of a view (invoked by the layout manager)
+    override fun onBindViewHolder(viewHolder: ViewHolder, position: Int) {
+
+        // Get element from your dataset at this position and replace the
+        // contents of the view with that element
+        viewHolder.textView.text = dataSet[position]
+    }
+
+    // Return the size of your dataset (invoked by the layout manager)
+    override fun getItemCount() = dataSet.size
+
+}
diff --git a/app/src/main/res/drawable/account_outline.xml b/app/src/main/res/drawable/account_outline.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+  <path
+      android:fillColor="#FF000000"
+      android:pathData="M12,4A4,4 0,0 1,16 8A4,4 0,0 1,12 12A4,4 0,0 1,8 8A4,4 0,0 1,12 4M12,6A2,2 0,0 0,10 8A2,2 0,0 0,12 10A2,2 0,0 0,14 8A2,2 0,0 0,12 6M12,13C14.67,13 20,14.33 20,17V20H4V17C4,14.33 9.33,13 12,13M12,14.9C9.03,14.9 5.9,16.36 5.9,17V18.1H18.1V17C18.1,16.36 14.97,14.9 12,14.9Z"/>
+</vector>
diff --git a/app/src/main/res/drawable/baseline_arrow_back_24.xml b/app/src/main/res/drawable/baseline_arrow_back_24.xml
@@ -0,0 +1,5 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:autoMirrored="true" android:height="24dp" android:tint="#000000" android:viewportHeight="24" android:viewportWidth="24" android:width="24dp">
+
+    <path android:fillColor="@android:color/white" android:pathData="M20,11H7.83l5.59,-5.59L12,4l-8,8 8,8 1.41,-1.41L7.83,13H20v-2z"/>
+
+</vector>
diff --git a/app/src/main/res/drawable/baseline_bookmark_border_24.xml b/app/src/main/res/drawable/baseline_bookmark_border_24.xml
@@ -0,0 +1,5 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:height="24dp" android:tint="#000000" android:viewportHeight="24" android:viewportWidth="24" android:width="24dp">
+
+    <path android:fillColor="@android:color/white" android:pathData="M17,3L7,3c-1.1,0 -1.99,0.9 -1.99,2L5,21l7,-3 7,3L19,5c0,-1.1 -0.9,-2 -2,-2zM17,18l-5,-2.18L7,18L7,5h10v13z"/>
+
+</vector>
diff --git a/app/src/main/res/drawable/baseline_highlight_off_24.xml b/app/src/main/res/drawable/baseline_highlight_off_24.xml
@@ -0,0 +1,5 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:height="24dp" android:tint="#000000" android:viewportHeight="24" android:viewportWidth="24" android:width="24dp">
+
+    <path android:fillColor="@android:color/white" android:pathData="M14.59,8L12,10.59 9.41,8 8,9.41 10.59,12 8,14.59 9.41,16 12,13.41 14.59,16 16,14.59 13.41,12 16,9.41 14.59,8zM12,2C6.47,2 2,6.47 2,12s4.47,10 10,10 10,-4.47 10,-10S17.53,2 12,2zM12,20c-4.41,0 -8,-3.59 -8,-8s3.59,-8 8,-8 8,3.59 8,8 -3.59,8 -8,8z"/>
+
+</vector>
diff --git a/app/src/main/res/drawable/baseline_mic_24.xml b/app/src/main/res/drawable/baseline_mic_24.xml
@@ -0,0 +1,5 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:height="24dp" android:tint="#000000" android:viewportHeight="24" android:viewportWidth="24" android:width="24dp">
+
+    <path android:fillColor="@android:color/white" android:pathData="M12,14c1.66,0 2.99,-1.34 2.99,-3L15,5c0,-1.66 -1.34,-3 -3,-3S9,3.34 9,5v6c0,1.66 1.34,3 3,3zM17.3,11c0,3 -2.54,5.1 -5.3,5.1S6.7,14 6.7,11L5,11c0,3.41 2.72,6.23 6,6.72L11,21h2v-3.28c3.28,-0.48 6,-3.3 6,-6.72h-1.7z"/>
+
+</vector>
diff --git a/app/src/main/res/drawable/baseline_sentiment_satisfied_alt_24.xml b/app/src/main/res/drawable/baseline_sentiment_satisfied_alt_24.xml
@@ -0,0 +1,13 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:height="24dp" android:tint="#000000" android:viewportHeight="24" android:viewportWidth="24" android:width="24dp">
+
+    <path android:fillColor="@android:color/white" android:pathData="M15.5,9.5m-1.5,0a1.5,1.5 0,1 1,3 0a1.5,1.5 0,1 1,-3 0"/>
+
+    <path android:fillColor="@android:color/white" android:pathData="M8.5,9.5m-1.5,0a1.5,1.5 0,1 1,3 0a1.5,1.5 0,1 1,-3 0"/>
+
+    <path android:fillColor="@android:color/white" android:pathData="M15.5,9.5m-1.5,0a1.5,1.5 0,1 1,3 0a1.5,1.5 0,1 1,-3 0"/>
+
+    <path android:fillColor="@android:color/white" android:pathData="M8.5,9.5m-1.5,0a1.5,1.5 0,1 1,3 0a1.5,1.5 0,1 1,-3 0"/>
+
+    <path android:fillColor="@android:color/white" android:pathData="M11.99,2C6.47,2 2,6.48 2,12s4.47,10 9.99,10C17.52,22 22,17.52 22,12S17.52,2 11.99,2zM12,20c-4.42,0 -8,-3.58 -8,-8s3.58,-8 8,-8 8,3.58 8,8 -3.58,8 -8,8zM12,17.5c2.33,0 4.32,-1.45 5.12,-3.5h-1.67c-0.69,1.19 -1.97,2 -3.45,2s-2.75,-0.81 -3.45,-2L6.88,14c0.8,2.05 2.79,3.5 5.12,3.5z"/>
+
+</vector>
diff --git a/app/src/main/res/drawable/baseline_sunny_24.xml b/app/src/main/res/drawable/baseline_sunny_24.xml
@@ -0,0 +1,5 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:height="24dp" android:tint="#000000" android:viewportHeight="24" android:viewportWidth="24" android:width="24dp">
+
+    <path android:fillColor="@android:color/white" android:pathData="M11,4V2c0,-0.55 0.45,-1 1,-1s1,0.45 1,1v2c0,0.55 -0.45,1 -1,1S11,4.55 11,4zM18.36,7.05l1.41,-1.42c0.39,-0.39 0.39,-1.02 0,-1.41c-0.39,-0.39 -1.02,-0.39 -1.41,0l-1.41,1.42c-0.39,0.39 -0.39,1.02 0,1.41C17.34,7.44 17.97,7.44 18.36,7.05zM22,11h-2c-0.55,0 -1,0.45 -1,1s0.45,1 1,1h2c0.55,0 1,-0.45 1,-1S22.55,11 22,11zM12,19c-0.55,0 -1,0.45 -1,1v2c0,0.55 0.45,1 1,1s1,-0.45 1,-1v-2C13,19.45 12.55,19 12,19zM5.64,7.05L4.22,5.64c-0.39,-0.39 -0.39,-1.03 0,-1.41s1.03,-0.39 1.41,0l1.41,1.41c0.39,0.39 0.39,1.03 0,1.41S6.02,7.44 5.64,7.05zM16.95,16.95c-0.39,0.39 -0.39,1.03 0,1.41l1.41,1.41c0.39,0.39 1.03,0.39 1.41,0c0.39,-0.39 0.39,-1.03 0,-1.41l-1.41,-1.41C17.98,16.56 17.34,16.56 16.95,16.95zM2,13h2c0.55,0 1,-0.45 1,-1s-0.45,-1 -1,-1H2c-0.55,0 -1,0.45 -1,1S1.45,13 2,13zM5.64,19.78l1.41,-1.41c0.39,-0.39 0.39,-1.03 0,-1.41s-1.03,-0.39 -1.41,0l-1.41,1.41c-0.39,0.39 -0.39,1.03 0,1.41C4.61,20.17 5.25,20.17 5.64,19.78zM12,6c-3.31,0 -6,2.69 -6,6s2.69,6 6,6s6,-2.69 6,-6S15.31,6 12,6z"/>
+
+</vector>
diff --git a/app/src/main/res/drawable/calendar.xml b/app/src/main/res/drawable/calendar.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+  <path
+      android:fillColor="#FF000000"
+      android:pathData="M19,19H5V8H19M16,1V3H8V1H6V3H5C3.89,3 3,3.89 3,5V19A2,2 0,0 0,5 21H19A2,2 0,0 0,21 19V5C21,3.89 20.1,3 19,3H18V1M17,12H12V17H17V12Z"/>
+</vector>
diff --git a/app/src/main/res/drawable/cellphone_check.xml b/app/src/main/res/drawable/cellphone_check.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+  <path
+      android:fillColor="#FF000000"
+      android:pathData="M14.54,23H7C5.9,23 5,22.11 5,21V3C5,1.89 5.89,1 7,1H17C18.1,1 19,1.89 19,3V13C18.3,13 17.63,13.13 17,13.35V5H7V19H13C13,20.54 13.58,21.94 14.54,23M17.75,22.16L15,19.16L16.16,18L17.75,19.59L21.34,16L22.5,17.41L17.75,22.16"/>
+</vector>
diff --git a/app/src/main/res/drawable/dots_vertical.xml b/app/src/main/res/drawable/dots_vertical.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+  <path
+      android:fillColor="#FF000000"
+      android:pathData="M12,16A2,2 0,0 1,14 18A2,2 0,0 1,12 20A2,2 0,0 1,10 18A2,2 0,0 1,12 16M12,10A2,2 0,0 1,14 12A2,2 0,0 1,12 14A2,2 0,0 1,10 12A2,2 0,0 1,12 10M12,4A2,2 0,0 1,14 6A2,2 0,0 1,12 8A2,2 0,0 1,10 6A2,2 0,0 1,12 4Z"/>
+</vector>
diff --git a/app/src/main/res/drawable/paperclip.xml b/app/src/main/res/drawable/paperclip.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+  <path
+      android:fillColor="#FF000000"
+      android:pathData="M16.5,6V17.5A4,4 0,0 1,12.5 21.5A4,4 0,0 1,8.5 17.5V5A2.5,2.5 0,0 1,11 2.5A2.5,2.5 0,0 1,13.5 5V15.5A1,1 0,0 1,12.5 16.5A1,1 0,0 1,11.5 15.5V6H10V15.5A2.5,2.5 0,0 0,12.5 18A2.5,2.5 0,0 0,15 15.5V5A4,4 0,0 0,11 1A4,4 0,0 0,7 5V17.5A5.5,5.5 0,0 0,12.5 23A5.5,5.5 0,0 0,18 17.5V6H16.5Z"/>
+</vector>
diff --git a/app/src/main/res/drawable/shape.xml b/app/src/main/res/drawable/shape.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+  <path
+      android:fillColor="#8E9199"
+      android:pathData="M11,13.5V21.5H3V13.5H11M12,2L17.5,11H6.5L12,2M17.5,13C20,13 22,15 22,17.5C22,20 20,22 17.5,22C15,22 13,20 13,17.5C13,15 15,13 17.5,13Z"/>
+</vector>
diff --git a/app/src/main/res/drawable/shape_bg.xml b/app/src/main/res/drawable/shape_bg.xml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <solid
+        android:color="#C4C6CF">
+    </solid>
+    <corners
+        android:radius="15dp">
+    </corners>
+</shape>
diff --git a/app/src/main/res/drawable/shape_dlg_button.xml b/app/src/main/res/drawable/shape_dlg_button.xml
@@ -0,0 +1,4 @@
+<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle" >
+    <solid android:color="#ffffff" />
+    <stroke android:width="1dip" android:color="#4fa5d5"/>
+</shape>
diff --git a/app/src/main/res/drawable/weather_sunny.xml b/app/src/main/res/drawable/weather_sunny.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+  <path
+      android:fillColor="#FF000000"
+      android:pathData="M12,7A5,5 0,0 1,17 12A5,5 0,0 1,12 17A5,5 0,0 1,7 12A5,5 0,0 1,12 7M12,9A3,3 0,0 0,9 12A3,3 0,0 0,12 15A3,3 0,0 0,15 12A3,3 0,0 0,12 9M12,2L14.39,5.42C13.65,5.15 12.84,5 12,5C11.16,5 10.35,5.15 9.61,5.42L12,2M3.34,7L7.5,6.65C6.9,7.16 6.36,7.78 5.94,8.5C5.5,9.24 5.25,10 5.11,10.79L3.34,7M3.36,17L5.12,13.23C5.26,14 5.53,14.78 5.95,15.5C6.37,16.24 6.91,16.86 7.5,17.37L3.36,17M20.65,7L18.88,10.79C18.74,10 18.47,9.23 18.05,8.5C17.63,7.78 17.1,7.15 16.5,6.64L20.65,7M20.64,17L16.5,17.36C17.09,16.85 17.62,16.22 18.04,15.5C18.46,14.77 18.73,14 18.87,13.21L20.64,17M12,22L9.59,18.56C10.33,18.83 11.14,19 12,19C12.82,19 13.63,18.83 14.37,18.56L12,22Z"/>
+</vector>
diff --git a/app/src/main/res/layout/activity_cart.xml b/app/src/main/res/layout/activity_cart.xml
@@ -6,4 +6,159 @@
     android:layout_height="match_parent"
     tools:context=".CartActivity">
 
+    <androidx.coordinatorlayout.widget.CoordinatorLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:id="@+id/CoordinatorLayout1">
+
+        <com.google.android.material.appbar.AppBarLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:id="@+id/AppBarLayout1">
+
+            <com.google.android.material.appbar.MaterialToolbar
+                android:id="@+id/topAppBar"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:minHeight="?attr/actionBarSize"
+                app:title="Cart"
+                app:menu="@menu/top_app_bar2"
+                app:navigationIcon="@drawable/baseline_arrow_back_24" />
+
+        </com.google.android.material.appbar.AppBarLayout>
+
+        <!-- Note: A RecyclerView can also be used -->
+        <androidx.core.widget.NestedScrollView
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            app:layout_behavior="@string/appbar_scrolling_view_behavior">
+
+            <!-- Scrollable content -->
+
+        </androidx.core.widget.NestedScrollView>
+
+    </androidx.coordinatorlayout.widget.CoordinatorLayout>
+
+    <TextView
+        android:id="@+id/textViewCnt"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="60dp"
+        android:layout_marginStart="10dp"
+        android:textStyle="bold"
+        android:text="4 items in your cart"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"/>
+
+    <androidx.recyclerview.widget.RecyclerView
+        android:id="@+id/recycler_view"
+        android:clipToPadding="false"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/textViewCnt"
+        />
+
+    <TextView
+        android:id="@+id/textView"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="20dp"
+        android:layout_marginStart="20dp"
+        android:text="Order Total:"
+        android:textStyle="bold"
+        android:textSize="22sp"
+        app:layout_constraintBottom_toTopOf="@+id/textView3"
+        app:layout_constraintStart_toStartOf="parent" />
+
+    <TextView
+        android:id="@+id/textView2"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="20dp"
+        android:layout_marginEnd="20dp"
+        android:text="$175.50"
+        android:textStyle="bold"
+        android:textSize="22sp"
+        app:layout_constraintBottom_toTopOf="@+id/textView4"
+        app:layout_constraintEnd_toEndOf="parent" />
+
+    <TextView
+        android:id="@+id/textView3"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="10dp"
+        android:layout_marginStart="20dp"
+        android:text="Subtotal:"
+        android:textStyle="bold"
+        app:layout_constraintBottom_toTopOf="@+id/textView5"
+        app:layout_constraintStart_toStartOf="parent" />
+
+    <TextView
+        android:id="@+id/textView4"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="10dp"
+        android:layout_marginEnd="20dp"
+        android:text="$140"
+        android:textStyle="bold"
+        app:layout_constraintBottom_toTopOf="@+id/textView6"
+        app:layout_constraintEnd_toEndOf="parent" />
+
+    <TextView
+        android:id="@+id/textView5"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="10dp"
+        android:layout_marginStart="20dp"
+        android:text="Shipping:"
+        android:textStyle="bold"
+        app:layout_constraintBottom_toTopOf="@+id/textView7"
+        app:layout_constraintStart_toStartOf="parent" />
+
+    <TextView
+        android:id="@+id/textView6"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="10dp"
+        android:layout_marginEnd="20dp"
+        android:text="$25"
+        android:textStyle="bold"
+        app:layout_constraintBottom_toTopOf="@+id/textView8"
+        app:layout_constraintEnd_toEndOf="parent" />
+
+    <TextView
+        android:id="@+id/textView7"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="10dp"
+        android:layout_marginStart="20dp"
+        android:text="Tax:"
+        android:textStyle="bold"
+        app:layout_constraintBottom_toTopOf="@+id/button"
+        app:layout_constraintStart_toStartOf="parent" />
+
+    <TextView
+        android:id="@+id/textView8"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="10dp"
+        android:layout_marginEnd="20dp"
+        android:text="$10.50"
+        android:textStyle="bold"
+        app:layout_constraintBottom_toTopOf="@+id/button"
+        app:layout_constraintEnd_toEndOf="parent" />
+
+    <Button
+        android:id="@+id/button"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="15dp"
+        app:icon="@drawable/baseline_sentiment_satisfied_alt_24"
+        android:text="Place order"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent" />
+
+
 </androidx.constraintlayout.widget.ConstraintLayout>