我可以将socket绑定到android 5.x中的特定网络.如何绑定DatagramSocket？可能吗？如果可以通过反射而没有运气来查看来源. https://developer.android.com/reference/android/net/Network.html#bindSocket(java.net.Socket)
UPDATE ParcelFileDescriptor.fromDatagramSocket(socket).getFd()可以替换辅助函数getFileDescriptor.在API 23中还有直接绑定到FileDescriptor的新函数https://developer.android.com/reference/android/net/Network.html#bindSocket%28java.io.FileDescriptor%29
更新:刚刚在API级别22中看到了一些灰色的额外新功能 .https://developer.android.com/reference/android/net/Network.html#bindSocket(java.net.DatagramSocket)
更新:也可以使用API级别21中的反射来完成
private static int getFileDescriptor(DatagramSocket socket) throws SocketException {
try {
Field implField = DatagramSocket.class.getDeclaredField("impl");
implField.setAccessible(true);
DatagramSocketImpl implValue = (DatagramSocketImpl)implField.get(socket);
Field fdField = DatagramSocketImpl.class.getDeclaredField("fd");
fdField.setAccessible(true);
FileDescriptor fdValue = (FileDescriptor)fdField.get(implValue);
Field descField = FileDescriptor.class.getDeclaredField("descriptor");
descField.setAccessible(true);
return (Integer)descField.get(fdValue);
} catch (NoSuchFieldException e) {
e.printStackTrace();
throw new AssertionError(e);
} catch (IllegalAccessException e) {
e.printStackTrace();
throw new AssertionError(e);
}
}
private DatagramChannel createDatagramChannel(Network activeWifiNetwork) throws IOException{
DatagramChannel channel = DatagramChannel.open();
try{
if (activeWifiNetwork == null) …