Java 为什么我的服务类接收空值？
我有一个Java 为什么我的服务类接收空值？,java,android,networking,service,Java,Android,Networking,Service,我有一个PlayerActivity类和一个PlayerConnect类 之前，我使用了PlayerActivity类来启动一个线程，该线程将运行PlayerConnect。我最近发现线程行为有点不正常，建议使用服务（为此：IntentServices） 问题：我的日志告诉我IP、name和init为null、null、0，但情况不应该是这样，因为它们应该在启动服务之前设置。日志还告诉我它无法连接到本地主机，我认为它默认为本地主机，因为它没有一个可尝试的设置IP 我的意图中是否正确引用了Play
PlayerActivityPlayerConnectPlayerActivityPlayerConnectPlayerConnectpublic 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());
}
}
}
});
}
}
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;
}
}
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());
}
}
}
});
}
}
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;
}
}
不，您永远不想自己构造服务子类（newplayerconnect（））。这是系统的工作。它为响应startService（）调用而提供的数据与从构造函数返回的数据完全不同，因此它不会包含任何您添加到其中的数据。您需要将数据添加到PlayerConnectionContent，并在OnHandleContent（）中检索数据
不，您永远不希望自己构建
服务子类（newplayerconnect（）
）。这是系统的工作。它为响应startService（）
调用而提供的数据与从构造函数返回的数据完全不同，因此它不会包含任何您添加到其中的数据。您需要将数据添加到playerConnectIntent
，然后在onHandleIntent（）
中检索数据。先看看。