在Android Lollipop上使用NFC激活设备所有者

Question

我正在尝试在使用NFC的设备上设置设备所有者包。在这里的Lollipop概述中提到：

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);

它似乎意识到了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，它没有尝试连接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，我有一个问题，它下载我的APK和校验和失败。根本不知道为什么。