try harder at using haptic feedback

app/build.gradle

@@ -63,7 +63,7 @@ android {
 }
 
 dependencies {
-    implementation 'com.github.SimpleMobileTools:Simple-Commons:ed8c5a3657'
+    implementation 'com.github.SimpleMobileTools:Simple-Commons:bcf4a22735'
     implementation 'me.grantland:autofittextview:0.2.1'
     implementation 'net.objecthunter:exp4j:0.4.8'
 

app/src/main/res/layout-land/activity_main.xml

@@ -4,6 +4,7 @@
     android:id="@+id/calculator_holder"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
+    android:hapticFeedbackEnabled="true"
     android:orientation="vertical"
     tools:context="com.simplemobiletools.calculator.activities.MainActivity"
     tools:ignore="HardcodedText">

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

@@ -4,6 +4,7 @@
     android:id="@+id/calculator_holder"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
+    android:hapticFeedbackEnabled="true"
     android:orientation="vertical"
     tools:context="com.simplemobiletools.calculator.activities.MainActivity"
     tools:ignore="HardcodedText">