project #8: add last row

Author: kmhmubin

Calculator/app/src/main/res/layout/activity_main.xml

@@ -225,5 +225,26 @@
 
     </LinearLayout>
 
+    <!--   Row 5-->
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_marginTop="2dp"
+        android:layout_weight="1"
+        android:orientation="horizontal">
+
+        <Button
+            android:id="@+id/btnEqual"
+            android:layout_width="0dp"
+            android:layout_height="match_parent"
+            android:layout_weight="1"
+            android:onClick="onDigit"
+            android:text="@string/equal"
+            android:textSize="30sp"
+            tools:ignore="ButtonStyle,NestedWeights" />
+
+
+    </LinearLayout>
 
 </LinearLayout>

Calculator/app/src/main/res/values/strings.xml

@@ -16,4 +16,5 @@
     <string name="clear">CLR</string>
     <string name="_0">0</string>
     <string name="dot">.</string>
+    <string name="equal">=</string>
 </resources>