登录启动页优化

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

@@ -0,0 +1,23 @@
+<?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:id="@+id/main"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="@color/white"
+    tools:context=".home.StartActivity">
+
+    <!-- Logo 图片：横竖屏均居中 -->
+    <ImageView
+        android:id="@+id/logoFrame"
+        android:layout_width="160dp"
+        android:layout_height="120dp"
+        android:src="@mipmap/loge1"
+        android:padding="5dp"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toEndOf="parent" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>