android - DeviceOwner: Trying to set device owner but device is already provisioned

客戶寫了一個apk要成爲device owner；
之後apk聯網更新升級；
強制卸載安裝，導致無法再次成爲DeviceOwner。

原因：當一個app成爲DeviceOwner後，這個app是不能被卸載，但是由於應用更新，強制卸載之前沒有註銷DeviceOwner，導致異常。

解決方案：
https://blog.csdn.net/u011068702/article/details/53191952

針對問題進行解決的過程：
1.adb shell dpm set-device-owner io.shoonya.shoonyadpc/com.shoonyaos.shoonyadpc.receivers.AdminReceiver
java.lang.IllegalStateException: Trying to set device owner but device is already provisioned.
at android.os.Parcel.readException(Parcel.java:1554)
at android.os.Parcel.readException(Parcel.java:1499)
at android.app.admin.IDevicePolicyManager$Stub$Proxy.setDeviceOwner(IDevicePolicyManager.java:3212)
at com.android.commands.dpm.Dpm.runSetDeviceOwner(Dpm.java:114)
at com.android.commands.dpm.Dpm.onRun(Dpm.java:82)
at com.android.internal.os.BaseCommand.run(BaseCommand.java:47)
at com.android.commands.dpm.Dpm.main(Dpm.java:38)
at com.android.internal.os.RuntimeInit.nativeFinishInit(Native Method)
at com.android.internal.os.RuntimeInit.main(RuntimeInit.java:249)

2.adb shell dumpsys account
User UserInfo{0:機主:13}:
Accounts: 1
Account {name=PHONE, type=com.android.localphone}

Active Sessions: 0

RegisteredServicesCache: 4 services
ServiceInfo: AuthenticatorDescription {type=com.qualcomm.RIDL}, ComponentInfo{com.qualcomm.RIDL/com.qualcomm.RIDL.cService}, uid 1000
ServiceInfo: AuthenticatorDescription {type=com.android.localphone}, ComponentInfo{com.qualcomm.simcontacts/com.qualcomm.simcontacts.PhoneAuthenticateService}, uid 1000
ServiceInfo: AuthenticatorDescription {type=com.android.sim}, ComponentInfo{com.qualcomm.simcontacts/com.qualcomm.simcontacts.SimAuthenticateService}, uid 1000
ServiceInfo: AuthenticatorDescription {type=com.qualcomm.qti.calendarlocalaccount}, ComponentInfo{com.qualcomm.qti.calendarlocalaccount/com.qualcomm.qti.calendarlocalaccount.AuthenticationService}, uid 10024

3.adb shell pm hide com.qualcomm.simcontacts
Package com.qualcomm.simcontacts new hidden state: true

4.adb shell dpm set-device-owner io.shoonya.shoonyadpc/com.shoonyaos.shoonyadpc.receivers.AdminReceiver
Success: Device owner set to package io.shoonya.shoonyadpc
Active admin set to component {io.shoonya.shoonyadpc/com.shoonyaos.shoonyadpc.receivers.AdminReceiver}

5.adb shell pm unhide com.qualcomm.simcontacts
Package com.qualcomm.simcontacts new hidden state: false

這個臨時方案是在設備有adb的情況下，但是根據復現問題的現象來看，每次應用更新就要操作一邊很麻煩，並且以後發佈user版本沒有adb就無法解決這個問題。

最好的方法是應用在更新之前調用：
devicePolicyManager.clearDeviceOwnerApp(getPackageName());
解除Device Owner身份

另外，
adb shell dpm remove-active-admin 指令需要android:testOnly才能移除。

移除DeviceOwner
當一個app成爲DeviceOwner後，這個app是不能被卸載，也無法在設置->安全中關閉其權限。要想DeviceOwner後還能卸載這個app，也就是退出DeviceOwner，有如下方法：

devicePolicyManager.clearDeviceOwnerApp(packageName)
1，在AndroidManifest.xml中的<application/>節點添加android:testOnly="true"；
2，通過命令adb install -t examole.apk安裝該app；
3，通過命令adb shell dpm set-device-owner com.example.sample/.MyDeviceAdminReceiver成爲DeviceOwner；
4，通過命令adb shell dpm remove-active-admin com.example.sample/.MyDeviceAdminReceive退出DeviceOwner；

偶然百度到了一個DEMO：
https://github.com/ddssingsong/DevicePolicyManager