beautified some ui

android/sample-app/src/main/res/drawable/ic_screen_rotation.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24.0"
+    android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FFFFFFFF"
+        android:pathData="M16.48,2.52c3,2.02 5.02,5.27 5.02,9.48 0,1.77 -0.38,3.45 -1.06,4.97L10.02,2.94C11.39,2.51 12.86,2.28 14.4,2.28c0.74,0 1.47,0.08 2.08,0.24zM10.02,21.06L1.56,7.43C0.56,8.82 0,10.36 0,12c0,4.97 4.03,9 9,9h0.51C9.73,21.06 9.87,21.06 10.02,21.06zM9,22.06C3.96,22.06 -0.03,18.08 -0.03,13.04c0,-1.6 0.39,-3.11 1.07,-4.44l8.57,13.12C9.63,21.72 9.6,21.88 9.6,22.06 9.6,22.06 9.6,22.06 9,22.06zM20.93,5.44c0.68,1.33 1.07,2.84 1.07,4.44 0,5.04 -3.99,9.02 -9.03,9.02 -0.2,0 -0.4,-0.01 -0.6,-0.02l8.56,-13.44L20.93,5.44z"/>
+</vector>

android/sample-app/src/main/res/values/strings.xml

@@ -1,3 +1,3 @@
 <resources>
-    <string name="app_name">口语宝</string>
+    <string name="app_name">跟读虫</string>
 </resources>

android/sample-app/src/main/res/xml/network_security_config.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+    允许 HTTP 明文访问，便于直连内网/开发环境部署的服务器（如 http://192.168.x.x）。
+    同时信任系统证书和用户手动安装的证书（自签/私有 CA 时需先把证书装到手机）。
+-->
+<network-security-config>
+    <base-config cleartextTrafficPermitted="true">
+        <trust-anchors>
+            <certificates src="system" />
+            <certificates src="user" />
+        </trust-anchors>
+    </base-config>
+</network-security-config>