“你需要在你的apk上添加一个图标”

Question

我在这里查看了其他文章并浏览了他们所有建议但却无济于事的内容。每当我尝试在APK上传alpha testing google play时，我都会收到同样的错误消息：

  

您需要在APK中添加图标。

不确定我做错了什么，但如果有人能帮助我，那将非常感激。

以下是我AndroidManifest的副本：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" android:versionCode="1" android:versionName="1.0" package="com.sdkbox.activity.CustomActivity" android:installLocation="preferExternal">
  <application android:icon="@drawable/app_icon" android:label="@string/app_name" android:debuggable="false" android:isGame="true" android:banner="@drawable/app_banner">
    <activity android:icon="@drawable/app_icon" android:configChanges="fontScale|keyboard|keyboardHidden|locale|mnc|mcc|navigation|orientation|screenLayout|screenSize|smallestScreenSize|uiMode|touchscreen" android:label="@string/app_name" android:name="com.sdkbox.activity.CustomActivity.CustomActivity">
      <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" />
        <category android:name="android.intent.category.LEANBACK_LAUNCHER" />
      </intent-filter>
    </activity>
    <activity android:configChanges="fontScale|keyboard|keyboardHidden|locale|mnc|mcc|navigation|orientation|screenLayout|screenSize|smallestScreenSize|uiMode|touchscreen" android:hardwareAccelerated="true" android:name="com.unity3d.ads.android.view.UnityAdsFullscreenActivity" android:theme="@android:style/Theme.NoTitleBar.Fullscreen" xmlns:tools="http://schemas.android.com/tools" tools:ignore="UnusedAttribute" />
  </application>
  <uses-permission android:name="android.permission.INTERNET" />
  <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
  <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
  <uses-permission android:name="com.android.vending.BILLING" />
  <uses-sdk android:minSdkVersion="9" android:targetSdkVersion="23" />
  <uses-feature android:glEsVersion="0x00020000" />
  <uses-feature android:name="android.hardware.sensor.accelerometer" android:required="false" />
  <uses-feature android:name="android.hardware.touchscreen" android:required="false" />
  <uses-feature android:name="android.hardware.touchscreen.multitouch" android:required="false" />
  <uses-feature android:name="android.hardware.touchscreen.multitouch.distinct" android:required="false" />
</manifest>