Android 套接字未从 php 服务器接收数据

我在安卓客户端从 php 服务器接收数据时遇到问题。Android可以成功地将数据写入php服务器，服务器接受该数据，然后将响应发送回该客户端，但Android不接受。它不会从Socket s = ss.accept()向前移动

这是我的安卓代码来接收数据

public void run() {
    Boolean end = false;
    ServerSocket ss = serverSocket;
    /*try {
        ss = new ServerSocket(54546);
    } catch (IOException e1) {
        //TODO Auto-generated catch block
        e1.printStackTrace();
    }*/
    while(!end){
        //Server is waiting for client here, if needed
        try {
            Log.i("before accept", "yes");
            Socket s = ss.accept();
            BufferedReader input = new BufferedReader(new InputStreamReader(s.getInputStream()));
            //PrintWriter output = new PrintWriter(s.getOutputStream(),true); //Autoflush
            String st = input.readLine();
            Log.d("Tcp Example", "From client: "+st);
            //output.println("Good bye and thanks for all the fish :)");
        }catch (IOException e) {
            e.printStackTrace();
        }
    }
}

这是我的 php 代码

$host = "127.0.0.1";
$port = 54546;
set_time_limit(0);
$socket = socket_create(AF_INET, SOCK_STREAM, 0) or die("Could not create socket'n");
//$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP) or die("Could not create socket'n");
/*if (!socket_connect($socket, $host, $port)) {
    die('failed'.socket_strerror(socket_last_error($socket)));
}*/
if (!socket_set_option($socket, SOL_SOCKET, SO_REUSEADDR, 1)) { 
    echo socket_strerror(socket_last_error($socket)); 
    exit; 
}
$result = socket_bind($socket, $host, $port) or die("Could not create socket'n");
$result = socket_listen($socket, 3) or die("Could not set up socket listener'n");
echo "'nbefore socket accept while loop'n";
$aaa = fopen("tesst.txt", "w");
while(true)
{
    echo "'nbefore socket accept'n";
    $spawn = socket_accept($socket) or die("Could not accept incoming connection'n");
    echo "'nThe server is ready'n";
    $input = socket_read($spawn, 1024) or die("Could not read input'n");
    echo "Input recieved from $spawn : ".$input;
    fwrite($aaa, $input);
    $output = $input."'n";
    $sent = socket_write($spawn, $output, strlen ($output)) or die("Could not write output'n");
    echo "Output sent ".$sent;
    socket_close($spawn);
}   
fclose($aaa);
socket_close($socket);
echo "'nTerminating'n";

ss.accept()不接受来自服务器的连接。