#3 #18 第三次实验

students/net1814080903204/activity_main.xml

@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.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=".Net1814080903204Activity">
+
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="Hello World!"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintRight_toRightOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <Button
+        android:id="@+id/Button1"
+        android:layout_width="408dp"
+        android:layout_height="49dp"
+        android:text="@string/JumpCopy1"
+        app:layout_constraintTop_toTopOf="parent"
+        />
+
+    <Button
+        android:id="@+id/Button2"
+        android:layout_width="408dp"
+        android:layout_height="49dp"
+        android:layout_below="@+id/Button1"
+        android:text="@string/JumpCopy2"
+        app:layout_constraintTop_toBottomOf="@id/Button1"
+        />
+
+    <ImageView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:src="@drawable/logo"/>
+
+
+</androidx.constraintlayout.widget.ConstraintLayout>