Question

我正在尝试使用演示WiFi直接应用程序直接与wifi建立客户端服务器套接字连接。演示应用程序在活动打开时建立连接的情况下工作正常但是如果我创建后台服务并尝试侦听套接字连接，则后台服务中运行的服务器不接受连接。代码如下：

    Server:

public class MyBackgroundService extends Service implements ChannelListener, ConnectionInfoListener {

 private Runnable runnable = new Runnable() {
        @Override
        public void run() {
                // put your socket-code here
                String filename= null;

//                Toast t = Toast.makeText(context,"Opening a server socket",Toast.LENGTH_LONG);
//                t.show();

                DataInputStream inputstream = null;
                try {
                    ServerSocket serverSocket = new ServerSocket(8988);
                    Log.e(WiFiDirectActivity.TAG, "Server: Socket opened");
                    Socket client = serverSocket.accept();
                    Log.e(WiFiDirectActivity.TAG, "Server: connection done");

        ....

}

@Override
    public void onConnectionInfoAvailable(final WifiP2pInfo info) {


        this.info = info;
        if (info.groupFormed && info.isGroupOwner) {
            Log.e(WiFiDirectActivity.TAG,"FileServeronConneitoninfo Background");
            new Thread(runnable).start();
        }
    }

客户端：

public class FileTransferService extends IntentService {

private static final int SOCKET_TIMEOUT = 0;

@Override
    protected void onHandleIntent(Intent intent) {

        Context context = getApplicationContext();
        if (intent.getAction().equals(ACTION_SEND_FILE)) {
            String filename= intent.getExtras().getString(EXTRAS_FILE_PATH);
            String host = intent.getExtras().getString(EXTRAS_GROUP_OWNER_ADDRESS);
            Socket socket = new Socket();
            int port = intent.getExtras().getInt(EXTRAS_GROUP_OWNER_PORT);
            DataOutputStream stream = null;
            try {
                Log.e(WiFiDirectActivity.TAG, "Opening client socket - ");
                socket.bind(null);
                Log.e(WiFiDirectActivity.TAG, "Opening client socket - ");
                socket.connect((new InetSocketAddress(host, port)), SOCKET_TIMEOUT);
                Log.e(WiFiDirectActivity.TAG, "Client socket - " + socket.isConnected());

                // ...

            }
            catch (IOException e) {
                Log.e(WiFiDirectActivity.TAG, "IOException in File transfer");
                Log.e(WiFiDirectActivity.TAG, e.getMessage());

            }
            finally {
                if (socket != null) {
                    if (socket.isConnected()) {
                        try {
                            socket.close();
                            stream.close();
                        } catch (IOException e) {
                            // Give up
                            e.printStackTrace();
                        }
                    }
                }
            }

客户端正在获得超时异常，并且connect和accept之后的两行都没有执行。有什么可能的原因吗？我已将超时0设置为防止超时异常，但仍然没有建立连接。这只发生在后台服务中，但如果我在活动中这样做，一切正常。提前谢谢。

Log Cat服务器端输出：

01-28 11：21：12.391 E / wifidirectdemo：COnnection_Change_BackgroundService

01-28 11：21：12.392 E / wifidirectdemo：ConnectionInfo可用背景

01-28 11：21：12.392 E / wifidirectdemo：FileServeronConneitoninfo背景

01-28 11：21：12.394 E / wifidirectdemo：服务器：套接字打开

01-28 11：21：22.877 E / wifidirectdemo：P2P对等体发生了变化

Serversocket.accept（）在后台服务中实现时不接受服务器端的连接

0 个答案: