android: 图标+预测性返回+心跳更新 阶段7预验收

android/app/src/main/AndroidManifest.xml

@@ -5,9 +5,11 @@
 
     <application
         android:label="MAG160C"
+        android:icon="@drawable/ic_launcher"
         android:theme="@android:style/Theme.Material.Light.NoActionBar"
         android:supportsRtl="true"
-        android:allowBackup="false">
+        android:allowBackup="false"
+        android:enableOnBackInvokedCallback="true">
 
         <activity
             android:name=".MainActivity"

android/app/src/main/res/drawable/ic_launcher.xml

@@ -0,0 +1,6 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:width="108dp" android:height="108dp" android:viewportWidth="108" android:viewportHeight="108">
+  <path android:fillColor="#FF1B2B33" android:pathData="M0,0h108v108h-108z" />
+  <path android:fillColor="#FFFFB59B" android:pathData="M54,54m-20,0a20,20 0 1,1 40,0a20,20 0 1,1 -40,0" />
+  <path android:fillColor="#FF8F4C38" android:pathData="M54,54m-12,0a12,12 0 1,1 24,0a24,24 0 1,1 -24,0" />
+  <path android:fillColor="#FFFFE0D2" android:pathData="M54,54m-6,0a6,6 0 1,1 12,0a6,6 0 1,1 -12,0" />
+</vector>