Android 服务区e和xEC；应用程序执行

你好，我在服务方面有问题。 我正在制作一个应用程序，它实现一个UDPServer，并在收到的数据包中登录主活动。我希望即使活动已关闭，服务也能启动，所以我想我必须使用服务。这是真的吗？ 我已经意识到一个应用程序实现了一个音乐播放器服务没有问题，但是当在服务启动函数中插入UDP服务器的代码时，我的应用程序崩溃了。 这是关于udp服务器的代码：

    InetAddress serverAddr = InetAddress.getByName(SERVERIP);       
    //Create the socket using the serverAddress 
    //notifica("STARTING SERVER!", "UDP***Creating server" );
    //System.out.println("UDP***Creating server"); 
    DatagramSocket socket = new DatagramSocket(SERVERPORT, serverAddr); 

    //create a buffer to copy packet contents into 
    byte[] buf = new byte[260]; 
    //create a packet to receive 
    DatagramPacket packet = new DatagramPacket(buf, buf.length); 
    notifica("START!", "Server started!" );
    while(true) {

        try{
            socket.receive(packet); 
            System.out.println("UDP***" + new String(packet.getData())); 
            notifica("RECEIVED!", new String(packet.getData()) );

        } catch (Exception e) { 
        notifica("EXC_INT:", "UDP Received Exception! " + e.toString() );
        }

    } 

我认为问题在于指挥部：

socket.receive(packet); 

它阻止执行并等待读取内容。 我希望主程序不会阻止等待服务

我尝试在服务中插入超时和休眠命令，但没有任何结果：

    InetAddress serverAddr = InetAddress.getByName(SERVERIP);       
    //Create the socket using the serverAddress 
    //notifica("STARTING SERVER!", "UDP***Creating server" );
    //System.out.println("UDP***Creating server"); 
    DatagramSocket socket = new DatagramSocket(SERVERPORT, serverAddr); 

    //create a buffer to copy packet contents into 
    byte[] buf = new byte[260]; 
    //create a packet to receive 
    DatagramPacket packet = new DatagramPacket(buf, buf.length); 
    notifica("START!", "Server started!" );
    while(true) {

        try{
            socket.setSoTimeout( 100 );
            socket.receive(packet); 
            System.out.println("UDP***" + new String(packet.getData())); 
            notifica("RECEIVED!", new String(packet.getData()) );
        } catch (SocketTimeoutException e) { 
        //notifica("EXC:", "UDP No data received!" );
        //Toast.makeText(getApplicationContext(), "UDP No data received!", Toast.LENGTH_SHORT).show();   
        } catch (Exception e) { 
        notifica("EXC_INT:", "UDP Received Exception! " + e.toString() );
        }
        try{
             Thread.sleep(30000);
        } catch (Exception e) { 
             notifica("EXC_INT_TIMER:", "Thread sleep exc! " + e.toString() );
        }
    } 

---

谢谢

如果不希望主程序在socket.receive（packet）上阻塞，则必须实现线程化

一种方法是将阻止代码放在下面：

新线程（）{

//例如，在这里放置阻塞代码

while（true）{

}.start（）

另外，如果您设置了超时和睡眠来解决问题，那么请将其删除，因为它不会解决崩溃问题

 public void run(){

    try{
        socket.setSoTimeout( 100 );
        socket.receive(packet); 
        System.out.println("UDP***" + new String(packet.getData())); 
        notifica("RECEIVED!", new String(packet.getData()) );
    } catch (SocketTimeoutException e) { 
    //notifica("EXC:", "UDP No data received!" );
    //Toast.makeText(getApplicationContext(), "UDP No data received!", Toast.LENGTH_SHORT).show();   
    } catch (Exception e) { 
    notifica("EXC_INT:", "UDP Received Exception! " + e.toString() );
    }
    try{
         Thread.sleep(30000);
    } catch (Exception e) { 
         notifica("EXC_INT_TIMER:", "Thread sleep exc! " + e.toString() );
    }
} 

}