Android NFC设备所有者设置:发送自定义属性.是否有可能? [英] Android NFC device owner provisioning: send custom properties. Is it possible?
问题描述
我当前正在开发一个应用程序,并且存在以下问题.
I'm currently developing an app and have the following issue.
使用NFC进行设备所有者配置时,我想发送一个字符串,供新的设备所有者应用程序使用.
While using NFC for device owner provisioning, I would like to send a string, which would be used by the new device owner app.
I'm aware of the standard MIME properties for device owner provisioning, found here
这是一个片段,可以使您更好地了解我的问题.注意"myCustomValue"属性.
Here's a snippet that can give you a better visual of my issue. Notice the "myCustomValue" property.
Properties properties = new Properties();
properties.put("myCustomValue", value);
properties.put(DevicePolicyManager.EXTRA_PROVISIONING_DEVICE_ADMIN_PACKAGE_NAME, "com.example.some.app");
try {
properties.store(stream, "NFC Provisioning");
ndefMessage = new NdefMessage(new NdefRecord[{NdefRecord.createMime(DevicePolicyManager.MIME_TYPE_PROVISIONING_NFC, stream.toByteArray())});
} catch (IOException e) {
}
此代码段位于内部
public NdefMessage createNdefMessage(NfcEvent event)
,您可以找到模板在可能的情况下,我还想知道如何在配置的应用程序启动后立即检索该字符串值.
In case this is possible, I also would like to know how to retrieve that string value as soon as the provisioned app has started.
推荐答案
下面的代码应该是您想要的.为简便起见,我只设置了程序包名称和两个字符串,该字符串将被发送到您的DeviceAdminReceiver.
The code below should be what you're looking for. For brevity, I only set the package name plus two strings that will be sent to your DeviceAdminReceiver.
@Override
public NdefMessage createNdefMessage(NfcEvent event) {
try {
Properties p = new Properties();
p.setProperty(
DevicePolicyManager.EXTRA_PROVISIONING_DEVICE_ADMIN_PACKAGE_NAME,
"com.example.some.app");
Properties extras = new Properties();
extras.setProperty("Key1", "TestString1");
extras.setProperty("Key2", "TestString2");
StringWriter sw = new StringWriter();
try{
extras.store(sw, "admin extras bundle");
p.put(DevicePolicyManager.EXTRA_PROVISIONING_ADMIN_EXTRAS_BUNDLE,
sw.toString());
Log.d(TAG, "Admin extras bundle=" + p.get(
DevicePolicyManager.EXTRA_PROVISIONING_ADMIN_EXTRAS_BUNDLE));
} catch (IOException e) {
Log.e(TAG, "Unable to build admin extras bundle");
}
ByteArrayOutputStream bos = new ByteArrayOutputStream();
OutputStream out = new ObjectOutputStream(bos);
p.store(out, "");
final byte[] bytes = bos.toByteArray();
NdefMessage msg = new NdefMessage(NdefRecord.createMime(
DevicePolicyManager.MIME_TYPE_PROVISIONING_NFC, bytes));
return msg;
} catch (Exception e) {
throw new RuntimeException(e);
}
}
此下一个代码段将进入您的DeviceAdminReceiver中,以接收管理员附加信息" ...如果您不覆盖 onReceive ,则需要 onProfileProvisioningComplete 在那里被EXTRA_PROVISIONING_ADMIN_EXTRAS_BUNDLE覆盖了.
This next snippet will go in your DeviceAdminReceiver in order to receive the "Admin Extras"... If you don't override onReceive, onProfileProvisioningComplete will need to be overridden with EXTRA_PROVISIONING_ADMIN_EXTRAS_BUNDLE handled in there instead.
@Override
public void onReceive(Context context, Intent intent) {
Log.d(TAG, "onReceive " + intent.getAction());
if (ACTION_PROFILE_PROVISIONING_COMPLETE.equals(intent.getAction())) {
PersistableBundle extras = intent.getParcelableExtra(
EXTRA_PROVISIONING_ADMIN_EXTRAS_BUNDLE);
Log.d(TAG, "onReceive Extras:" + extras.getString("Key1") + " / " + extras.getString("Key2"));
}
}
这篇关于Android NFC设备所有者设置:发送自定义属性.是否有可能?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!