Question

通常，我可以使用MulticastSocket或network service discovery通过Wi-Fi网络查找服务器

try (MulticastSocket multicastSocket = new MulticastSocket(Network.DISCOVERY_PORT)) {
    multicastSocket.setNetworkInterface(Network.getWifiInterface());
    multicastSocket.setSoTimeout((int) (3 * DateUtils.SECOND_IN_MILLIS));
    multicastSocket.joinGroup(InetAddress.getByName(Network.DISCOVERY_IP));
    ...
}

它工作正常，但是我不能在Instant App模块内使用这些方法，因为它需要不允许的 ACCESS_WIFI_STATE 权限。

知道即时应用程序允许 ACCESS_NETWORK_STATE 和 INTERNET 权限，有什么方法可以找到本地服务器IP，从而避免此错误？

java.net.BindException: bind failed: EACCES (Permission denied)

available permissions是：

ACCESS_COARSE_LOCATION
ACCESS_FINE_LOCATION
ACCESS_NETWORK_STATE
BILLING – Deprecated as of Play Billing Library 1.0.
CAMERA
INSTANT_APP_FOREGROUND_SERVICE – Only in Android 8.0 (API level 26) and higher.
INTERNET
READ_PHONE_NUMBERS – Only in Android 8.0 (API level 26) and higher.
RECORD_AUDIO
VIBRATE
WAKE_LOCK

组播和即时应用

0 个答案: