添加横竖屏切换及监听

app/src/main/ets/pages/layout/LinearLayoutPage.ets

@@ -0,0 +1,16 @@
+
+@Entry
+@Component
+struct LinearLayoutPage {
+
+  @State space: number = 10;
+
+  build() {
+    Column({ space: this.space }) {
+      Text(`space:${this.space}`)
+      Row().width('90%')
+      Row().width('90%')
+      Row().width('90%')
+    }
+  }
+}