[SOLVED] adb shell dpm set-device-owner with Unity issue

I am trying to make a Unity app go into kiosk mode by using COSU (Corporate Owned Single Use) functionality.

My plan was to first get things working using just Android, so I followed the tutorial offered by Google Code Labs

After I got this working, my plan was to then figure out how to integrate this into my Unity project. I followed this youtube video that showed how to make a plugin that can be called from Unity.

When I build my project, I try to execute the following command

adb shell dpm set-device-owner com.modalvr.unityplugin/.DeviceAdminReceiver

However, I keep getting the following error

Error: Unknown admin: ComponentInfo{com.modalvr.unityplugin/com.modalvr.unityplugin.DeviceAdminReceiver}

I wonder if Unity is not merging the AndroidManifest.xml files together correctly. Here is my AndroidManifest.xml file from plugin.

<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.modalvr.unityplugin">
    <application android:allowBackup="true" android:label="@string/app_name" android:supportsRtl="true">
        <receiver
            android:name="com.modalvr.unityplugin.DeviceAdminReceiver"
            android:description="@string/app_name"
            android:label="@string/app_name"
            android:permission="android.permission.BIND_DEVICE_ADMIN">
            <meta-data
                android:name="android.app.device_admin"
                android:resource="@xml/device_admin_receiver" />
            <intent-filter>
                <action android:name="android.intent.action.DEVICE_ADMIN_ENABLED"/>
                <action android:name="android.intent.action.PROFILE_PROVISIONING_COMPLETE"/>
                <action android:name="android.intent.action.BOOT_COMPLETED"/>
            </intent-filter>
        </receiver>
    </application>
</manifest>

I copied it and the classes.jar file into Unity's Assets/Plugins/Android/libs folder

I am able to successfully call functions in my plugin, so the plugin appears to be set up correctly.

For reference, this is my C# code that calls into the plugin

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class LockManager : MonoBehaviour {
#if UNITY_ANDROID
    private AndroidJavaObject playerActivityContext = null;
#endif

    public void SaveContext() {
#if UNITY_ANDROID
        // First, obtain the current activity context
        using (var actClass = new AndroidJavaClass("com.unity3d.player.UnityPlayer")) {
        playerActivityContext = actClass.GetStatic<AndroidJavaObject>("currentActivity");
        }

        var plugin = new AndroidJavaClass("com.modalvr.unityplugin.PluginClass");
        plugin.CallStatic<bool>("setContext", playerActivityContext);
#endif
    }

    public void LockButtonClicked() {
#if UNITY_ANDROID
        SaveContext();

        var plugin = new AndroidJavaClass("com.modalvr.unityplugin.PluginClass");
        bool retVal = plugin.CallStatic<bool>("lock", 7);
#endif
    }

public void UnlockButtonClicked() {
#if UNITY_ANDROID
        SaveContext();

        var plugin = new AndroidJavaClass("com.modalvr.unityplugin.PluginClass");
        bool retVal = plugin.CallStatic<bool>("unlock", 7);
#endif
    }
}

And this is the java class that defines those functions.

package com.modalvr.unityplugin;

import android.app.Activity;
import android.content.Context;
import android.util.Log;

public class PluginClass {
    private static Context context;

    public static boolean setContext(Context ctx) {
        context = ctx;
        return true;
    }

    public static boolean lock(int number) {
        Log.d("SOME TAG", "onReceive Lock");

        Activity activity = (Activity) context;
        activity.startLockTask();

        return true;
    }

    public static boolean unlock(int number) {
        Log.d("SOME TAG", "onReceive Unlock");

        Activity activity = (Activity) context;
        activity.stopLockTask();

        return true;
    }
}

It looks like Unity generates 2 XML files that it puts in Temp/StagingArea

AndroidManfist.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.ModalVR.KioskPluginTest" xmlns:tools="http://schemas.android.com/tools" android:versionName="1.0" android:versionCode="1" android:installLocation="preferExternal">
  <supports-screens android:smallScreens="true" android:normalScreens="true" android:largeScreens="true" android:xlargeScreens="true" android:anyDensity="true" />
  <application android:theme="@style/UnityThemeSelector" android:icon="@drawable/app_icon" android:label="@string/app_name" android:debuggable="false" android:isGame="true" android:banner="@drawable/app_banner">
    <activity android:name="com.unity3d.player.UnityPlayerActivity" android:label="@string/app_name" android:screenOrientation="fullSensor" android:launchMode="singleTask" android:configChanges="mcc|mnc|locale|touchscreen|keyboard|keyboardHidden|navigation|orientation|screenLayout|uiMode|screenSize|smallestScreenSize|fontScale|layoutDirection">
      <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>
      <meta-data android:name="unityplayer.UnityActivity" android:value="true" />
    </activity>
  </application>
  <uses-sdk android:minSdkVersion="9" android:targetSdkVersion="25" />
  <uses-feature android:glEsVersion="0x00020000" />
  <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>

and AndroidManifest-main.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.ModalVR.KioskPluginTest" xmlns:tools="http://schemas.android.com/tools" android:installLocation="preferExternal" android:versionName="1.0" android:versionCode="1">
  <supports-screens android:smallScreens="true" android:normalScreens="true" android:largeScreens="true" android:xlargeScreens="true" android:anyDensity="true" />
  <application android:theme="@style/UnityThemeSelector" android:icon="@drawable/app_icon" android:label="@string/app_name" android:debuggable="true">
    <activity android:name="com.unity3d.player.UnityPlayerActivity" android:label="@string/app_name">
      <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" />
      </intent-filter>
      <meta-data android:name="unityplayer.UnityActivity" android:value="true" />
    </activity>
  </application>
  <uses-sdk android:minSdkVersion="9" android:targetSdkVersion="25" />
</manifest>

In neither of these files do I see the contents of my Android plugin AndroidManifest.xml I guess that is the issue. Do I need to do something to make the manifest files merge?

And for completeness, here is

DeviceAdminReceiver.java

package com.modalvr.unityplugin;

import android.content.ComponentName;
import android.content.Context;

/**
 * Handles events related to the managed profile.
 */
public class DeviceAdminReceiver extends android.app.admin.DeviceAdminReceiver {
    private static final String TAG = "DeviceAdminReceiver";

    /**
     * @param context The context of the application.
     * @return The component name of this component in the given context.
     */
    public static ComponentName getComponentName(Context context) {
        return new ComponentName(context.getApplicationContext(), DeviceAdminReceiver.class);
    }
}

Thanks in advance for any help. John Lawrie