为什么我的服务类接收空值？

Question

我有一个PlayerActivity类和一个PlayerConnect类。

[以前，我使用PlayerActivity类来启动将运行PlayerConnect的线程。我最近发现该线程行为不正常，建议使用服务（为此：IntentServices）。

问题：我的日志告诉我IP，名称和init为null，null，0，这不是事实，因为它们应该在开始启动之前设置。服务。日志还告诉我它无法连接到本地主机，我认为这是默认设置，因为它没有要尝试的设置IP。

我在意图中正确引用了PlayerConnect类吗？

PlayerActivity：

public class PlayerActivity extends AppCompatActivity {

    InetAddress hostIP;
    String playerName;
    int playerInitiative = -1;
    boolean denied = false;
    boolean started = false;
    PlayerConnect playerConnect;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_player);

        submit = (Button) findViewById(R.id.submit);

        submit.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                if (!(playerName.equals("")) && playerInitiative > -1) {
                    try {
                        if (!(hostIPString.equals(""))) {
                            hostIP = InetAddress.getByName(hostIPString);
                            if(!(started)) {
                                playerConnect = new PlayerConnect();
                                playerConnect.SetHostIP(hostIP);
                                playerConnect.SetPlayerName(playerName);
                                playerConnect.SetPlayerInit(playerInitiative);
                                denied = playerConnect.GetDenied();
                                started = true;
                            }

                            else {
                                playerConnect.SetHostIP(hostIP);
                                playerConnect.SetPlayerName(playerName);
                                playerConnect.SetPlayerInit(playerInitiative);
                                denied = playerConnect.GetDenied();
                            }


                            if (denied)
                            {
                                started = false;
                            }

                            else
                            {
                                Intent playerConnectIntent =
                                        new Intent(PlayerActivity.this, playerConnect.getClass());
                                startService(playerConnectIntent);
                            }
                        }
                    }

                    catch (Exception e) {
                        Log.i("LOG", e.toString());
                    }
                }
            }
        });
    }
}

PlayerConnect：

public class PlayerConnect extends IntentService {

    public PlayerConnect() {
        super("PlayerConnect");
    }

    InetAddress hostIP;
    String playerName;
    int playerInitiative;
    boolean denied = false;

    @Override
    public void onHandleIntent(Intent intent) {
            SendPlayerData(hostIP, playerName, playerInitiative);
    }

    private void SendPlayerData(InetAddress IP, String name, int init) {
        try {
            int port = 8080;
            Socket socket = new Socket();
            socket.connect(new InetSocketAddress(IP, port), 3000);
            DataOutputStream output = new DataOutputStream(socket.getOutputStream());

            if (socket.isConnected())
            {
                output.writeUTF(name);
                output.writeInt(init);
                output.close();
                socket.close();

                Log.i("LOG", "client socket connected");
            }

            if (socket.isClosed())
            {
                stopSelf();

                Log.i("LOG", "client socket closed");
            }
        }

        catch (Exception e) {
            denied = true;
            Log.i("LOG", e.toString());
            Log.i("LOG", IP + name + init);

        }
    }

    public void SetHostIP(InetAddress host)
    {
        hostIP = host;
    }

    public void SetPlayerName(String name)
    {
        playerName = name;
    }

    public void SetPlayerInit(int init)
    {
        playerInitiative = init;
    }

    public boolean GetDenied()
    {
        return denied;
    }
}

Answer 1

greeble31 您的comment对我有很大帮助，所以我将其作为将来读者的答案。 谢谢。

不，您永远不想自己构造Service子类（新的PlayerConnect（））。这就是系统的工作。它提供给您一个响应startService（）调用的函数，它与您从构造函数返回的响应完全不同，因此它不会包含您添加的任何数据。您需要将数据添加到playerConnectIntent，并在onHandleIntent（）中进行检索。