Question

我正在尝试使用NFC在设备上设置设备所有者包。 Lollipop概述中提到了here：

要部署和激活设备所有者，您必须执行NFC数据在设备进入时从编程应用程序转移到设备它没有设想的状态。此数据传输发送相同的信息与托管供应中描述的供应意图一样。

原因是一旦设置完毕，您就可以使用屏幕固定功能将设备锁定在自助服务终端模式。我已经能够通过将device_owner.xml文件放置到root设备上的data / system /来手动设置设备所有者来测试此信息亭模式。

我之前从未使用过NFC，所以我可能会离开但我根据信息here提出了以下NdefMessage：

Properties properties = new Properties();
properties.setProperty(DevicePolicyManager.EXTRA_PROVISIONING_DEVICE_ADMIN_PACKAGE_NAME, "com.my.package");
properties.setProperty(DevicePolicyManager.EXTRA_PROVISIONING_WIFI_SSID, "MyWiFiSSID");
properties.setProperty(DevicePolicyManager.EXTRA_PROVISIONING_WIFI_PASSWORD, "WifiPassword");
properties.setProperty(DevicePolicyManager.EXTRA_PROVISIONING_DEVICE_ADMIN_PACKAGE_CHECKSUM, "C9AD9E082457819B54CF76255A400375E4127112");
properties.setProperty(DevicePolicyManager.EXTRA_PROVISIONING_DEVICE_ADMIN_PACKAGE_DOWNLOAD_LOCATION, "https://dl.dropboxusercontent.com/u/xxx/app-release.apk");


ByteArrayOutputStream bos = new ByteArrayOutputStream();
ObjectOutput out = new ObjectOutputStream(bos);
out.writeObject(properties);
byte[] yourBytes = bos.toByteArray();
NdefRecord ndefRecord = NdefRecord.createMime(DevicePolicyManager.MIME_TYPE_PROVISIONING_NFC, yourBytes);
NdefMessage msg = new NdefMessage(ndefRecord);

将此信息发送到我刚刚使用Lollipop预览功能恢复的设备会导致显示：

糟糕！无法设置您的设备。联系您的IT部门。

它似乎认识到它正在接收一个提供请求的事实，但我不认为它正在读取我设置的属性，它不会尝试连接wifi。

Answer 1

您似乎需要使用Properties.store来正确创建NdefRecord的字节。

Properties properties = new Properties();
properties.setProperty(...);

ByteArrayOutputStream bos = new ByteArrayOutputStream();
OutputStream out = new ObjectOutputStream(bos);
properties.store(out, "");
byte[] bytes = bos.toByteArray();

NdefMessage msg = new NdefMessage(NdefRecord.createMime(DevicePolicyManager.MIME_TYPE_PROVISIONING_NFC, bytes));

目前，我遇到了下载APK并且校验和失败的问题。完全不确定原因。

Answer 2

我一直试图通过NFC来解决这个问题。我在Nexus 4（KitKat）上安装了一个简单的应用程序，其中包含一项活动：

@Override
protected void onResume() {
    super.onResume();
    try {
        Properties properties = new Properties();
        properties.setProperty(DevicePolicyManager.EXTRA_PROVISIONING_DEVICE_ADMIN_PACKAGE_NAME, "com.deviceowner.app");
        properties.setProperty(DevicePolicyManager.EXTRA_PROVISIONING_DEVICE_ADMIN_PACKAGE_DOWNLOAD_LOCATION, "https://docs.google.com/uc?export=download&id=........");
        properties.setProperty(DevicePolicyManager.EXTRA_PROVISIONING_DEVICE_ADMIN_PACKAGE_CHECKSUM, "6ee735dfb8090ab1862fecce430864e21a0e37");
        properties.setProperty(DevicePolicyManager.EXTRA_PROVISIONING_WIFI_SSID, "wlan");
        properties.setProperty(DevicePolicyManager.EXTRA_PROVISIONING_WIFI_PASSWORD, "XXXXXX");
        properties.setProperty(DevicePolicyManager.EXTRA_PROVISIONING_WIFI_SECURITY_TYPE, "WPA2");

        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        ObjectOutput out = new ObjectOutputStream(bos);
        out.writeObject(properties);
        byte[] yourBytes = bos.toByteArray();
        NdefRecord ndefRecord = NdefRecord.createMime(DevicePolicyManager.MIME_TYPE_PROVISIONING_NFC, yourBytes);
        NdefMessage msg = new NdefMessage(ndefRecord);
        nfcAdapter.setNdefPushMessage(msg, this);
    } catch (IOException e) {
        e.printStackTrace();
    }
}

我使用Lollipop预览图像（razor-lpx13d-preview-ae4f461f.tgz）闪现我的Nexus 7，并在Nexus 7未配置时给它带有Nexus 4的NFC撞击（没有设置 - 闪烁后新鲜）并得到相同的错误信息：

糟糕！无法设置您的设备。联系您的IT部门。

然后我尝试了同样的事情，但这次是在Nexus 7上运行初始设备设置（到我可以看到主屏幕的位置）。这次我收到了消息

糟糕！此设备已设置

但是这一次，我能够看到一些日志，因为我能够在Nexus 7上设置USB调试：

10-22 10:31:29.947    2610-2610/? D/NfcService﹕ LLCP Activation message
10-22 10:31:29.947    2610-2610/? I/NfcP2pLinkManager﹕ LLCP activated
10-22 10:31:29.947    2610-2610/? D/NfcP2pLinkManager﹕ onP2pInRange()
10-22 10:31:29.954    2610-2610/? W/AudioTrack﹕ AUDIO_OUTPUT_FLAG_FAST denied by client
10-22 10:31:29.962      184-547/? D/audio_hw_primary﹕ select_devices: out_snd_device(2: speaker) in_snd_device(0: none)
10-22 10:31:29.962      184-547/? D/ACDB-LOADER﹕ ACDB -> send_afe_cal
10-22 10:31:29.962      184-547/? D/audio_hw_primary﹕ enable_snd_device: snd_device(2: speaker)
10-22 10:31:29.974      184-547/? D/audio_hw_primary﹕ enable_audio_route: apply and update mixer path: low-latency-playback
10-22 10:31:29.981    2610-2610/? D/NfcP2pLinkManager﹕ Last registered callback is not running in the foreground.
10-22 10:31:29.987    2610-2610/? D/NfcP2pLinkManager﹕ Disabling default Beam behavior
10-22 10:31:29.987    2610-2610/? D/NfcP2pLinkManager﹕ mMessageToSend = null
10-22 10:31:29.987    2610-2610/? D/NfcP2pLinkManager﹕ mUrisToSend = null
10-22 10:31:29.996    2610-2610/? D/NfcP2pLinkManager﹕ Took 48 to get first LLCP PDU
10-22 10:31:30.599    3224-3224/? I/wpa_supplicant﹕ wlan0: CTRL-EVENT-SCAN-STARTED
10-22 10:31:31.741    2610-2610/? D/NfcP2pLinkManager﹕ onP2pReceiveComplete()
10-22 10:31:31.751    2610-2610/? D/NfcService﹕ mock NDEF tag, starting corresponding activity
10-22 10:31:31.751    2610-2610/? D/NfcService﹕ TAG: Tech [android.nfc.tech.Ndef]
10-22 10:31:31.757    2610-3275/? W/AudioTrack﹕ AUDIO_OUTPUT_FLAG_FAST denied by client
10-22 10:31:31.770     549-2765/? I/ActivityManager﹕ START u0 {flg=0x10008000 cmp=com.android.nfc/.NfcRootActivity (has extras)} from uid 1027 on display 0
10-22 10:31:31.795    7237-7237/? D/ManagedProvisioning﹕ Device owner provisioning activity ONDESTROY
10-22 10:31:31.827    2610-3275/? W/AudioTrack﹕ AUDIO_OUTPUT_FLAG_FAST denied by client
10-22 10:31:31.848     549-2335/? I/ActivityManager﹕ START u0 {act=android.nfc.action.NDEF_DISCOVERED typ=application/com.android.managedprovisioning cmp=com.android.managedprovisioning/.DeviceOwnerProvisioningActivity (has extras)} from uid 1027 on display 0
10-22 10:31:31.886    7237-7237/? D/ManagedProvisioning﹕ Device owner provisioning activity ONCREATE
10-22 10:31:31.887    7237-7237/? E/ManagedProvisioning﹕ Device already provisioned.
10-22 10:31:31.903    7237-7237/? D/ManagedProvisioning﹕ Device owner provisioning activity ONRESUME
10-22 10:31:32.011      549-621/? I/ActivityManager﹕ Displayed com.android.managedprovisioning/.DeviceOwnerProvisioningActivity: +149ms (total +200ms)
10-22 10:31:32.955    2610-2610/? D/NfcService﹕ LLCP Link Deactivated message. Restart polling loop.
10-22 10:31:32.955    2610-2610/? I/NfcP2pLinkManager﹕ LLCP deactivated.
10-22 10:31:32.955    2610-2610/? D/NfcP2pLinkManager﹕ Debounce timeout
10-22 10:31:32.955    2610-2610/? D/NfcP2pLinkManager﹕ onP2pOutOfRange()

所以看起来设备所有者NFC碰撞只能发生在未设置的设备上。我感谢这不回答你的问题，但日志输出可能会有所帮助。掌握DeviceOwnerProvisioningActivity的源代码肯定会有所帮助。

Answer 3

您应手动输入WiFi参数。在Android 5.1中有一个错误已得到纠正。

在Android Lollipop上使用NFC激活设备所有者

3 个答案: