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Main Activity for the Counter App with Kotlin on the SSaurel's Blog
<?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"
tools:context="com.ssaurel.kotlincounter.MainActivity">
<TextView
android:id="@+id/value"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="100sp"
android:textStyle="bold"
android:text="0"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="@id/plusBtn"
app:layout_constraintBottom_toBottomOf="@id/minusBtn"
/>
<Button
android:id="@+id/plusBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="50sp"
android:text="+"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
android:layout_marginTop="50dp"
/>
<Button
android:id="@+id/minusBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="50sp"
android:text="-"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
android:layout_marginBottom="50dp"
/>
</android.support.constraint.ConstraintLayout>
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