我的活动中有一个微调器，我为每个选中的项目添加了不同的值。我使用switch case作为分支语句，但是当O调用using System;
using System.Collections.Concurrent;
using System.Threading;
using System.Threading.Tasks;
using DotNetty.Transport.Channels;
using Newtonsoft.Json;
using System.IO;
namespace MultiClientSocketExample
{
public enum Command
{
Register = 1, // Register a new client
SendToClient = 2, // Send a message from one client to antoher
DoClientAction = 3 // Replace this with your client-to-client command
}
// Envelope for all messages handled by the server
public class Message
{
public string ClientId { get; set; }
public Command Command { get; set; }
public string Data { get; set; }
}
// Command for seding a message from one client to antoher.
// This would be serialized as JSON and stored in the 'Data' member of the Message object.
public class SendToClientCommand
{
public string DestinationClientId { get; set; } // The client to receive the message
public Command ClientCommand { get; set; } // The command for the destination client to execute
public string Data { get; set; } // The payload for the destination client
}
// An object for storing unhandled messages in a queue to be processed asynchronously
// This allows us to process messages and respond to the appropriate client,
// without having to do everything in the ChannelRead0 method and block the main thread
public class UnhandledMessage
{
private readonly Message message;
private readonly IChannelHandlerContext context;
public UnhandledMessage(Message message, IChannelHandlerContext context)
{
this.message = message;
this.context = context;
}
public Message Message => message;
public IChannelHandlerContext Context => context;
public Command Command => message.Command;
public string ClientId => message.ClientId;
public string Data => message.Data;
}
// A representation of the connected Clients on the server.
// Note: This is not the 'Client' class that would be used to communicate with the server.
public class Client
{
private readonly string clientId;
private readonly IChannelHandlerContext context;
public Client(string clientId, IChannelHandlerContext context)
{
this.clientId = clientId;
this.context = context;
}
public string ClientId => clientId;
public IChannelHandlerContext Context => context;
}
// The socket server, using DotNetty's SimpleChannelInboundHandler
// The ChannelRead0 method is called for each Message received
public class Server : SimpleChannelInboundHandler<Message>, IDisposable
{
private readonly ConcurrentDictionary<string, Client> clients;
private readonly ConcurrentQueue<UnhandledMessage> unhandledMessages;
private readonly CancellationTokenSource cancellation;
private readonly AutoResetEvent newMessage;
public Server(CancellationToken cancellation)
{
this.clients = new ConcurrentDictionary<string, Client>();
this.newMessage = new AutoResetEvent(false);
this.cancellation = CancellationTokenSource.CreateLinkedTokenSource(cancellation);
}
// The start method should be called when the server is bound to a port.
// Messages will be received, but will not be processed unless/until the Start method is called
public Task Start()
{
// Start a dedicated thread to process messages so that the ChannelRead operation does not block
return Task.Run(() =>
{
var serializer = JsonSerializer.CreateDefault(); // This will be used to deserialize the Data member of the messages
while (!cancellation.IsCancellationRequested)
{
UnhandledMessage message;
var messageEnqueued = newMessage.WaitOne(100); // Sleep until a new message arrives
while (unhandledMessages.TryDequeue(out message)) // Process each message in the queue, then sleep until new messages arrive
{
if (message != null)
{
// Note: This part could be sent to the thread pool if you want to process messages in parallel
switch (message.Command)
{
case Command.Register:
// Register a new client, or update an existing client with a new Context
var client = new Client(message.ClientId, message.Context);
clients.AddOrUpdate(message.ClientId, client, (_,__) => client);
break;
case Command.SendToClient:
Client destinationClient;
using (var reader = new JsonTextReader(new StringReader(message.Data)))
{
var sendToClientCommand = serializer.Deserialize<SendToClientCommand>(reader);
if (clients.TryGetValue(sendToClientCommand.DestinationClientId, out destinationClient))
{
var clientMessage = new Message { ClientId = message.ClientId, Command = sendToClientCommand.ClientCommand, Data = sendToClientCommand.Data };
destinationClient.Context.Channel.WriteAndFlushAsync(clientMessage);
}
}
break;
}
}
}
}
}, cancellation.Token);
}
// Receive each message from the clients and enqueue them to be procesed by the dedicated thread
protected override void ChannelRead0(IChannelHandlerContext context, Message message)
{
unhandledMessages.Enqueue(new UnhandledMessage(message, context));
newMessage.Set(); // Trigger an event so that the thread processing messages wakes up when a new message arrives
}
// Flush the channel once the Read operation has completed
public override void ChannelReadComplete(IChannelHandlerContext context)
{
context.Flush();
base.ChannelReadComplete(context);
}
// Automatically stop the message-processing thread when this object is disposed
public void Dispose()
{
cancellation.Cancel();
}
}
}
，这是一个带有Toast的switch case中的变量时，虽然我选择了spinner里面的每个项目，但它显示0。我该如何解决？
这是我的kcptjalan
Activity.java