在我的应用程序中，当我登录时，我启动UpdaterService.class. 当我注销时，应用程序已成功注销。但是当我再次登录时，它首先给出FORCE CLOSE，第二次在我再次登录AFTER CLOSE时，它工作正常。我无法弄清楚背后的原因。
更新服务
public class UpdaterService extends Service implements InvitationListener {
private static XMPPConnection connection;
String Friend;
String user = "";
String senderName ="";
String subID="";
int subscription = 1;
@Override
public IBinder onBind(Intent arg0) {
// TODO Auto-generated method stub
return null;
}
@Override
public void onCreate() {
// Toast.makeText(this, "My Service Created", Toast.LENGTH_LONG).show();
super.onCreate();
}
@Override
public void onDestroy() {
super.onDestroy();
}
@Override
public void onStart(Intent intent, int startId) {
// TODO Auto-generated method stub
showToast("My Service Started", 0);
connection = getConnection();
if (connection.isConnected()) {
final Roster roster = connection.getRoster();
RosterListener r1 = new RosterListener() {
@Override
public void presenceChanged(Presence presence) {
// TODO Auto-generated method stub
//notification("changed");
}
@Override
public void entriesUpdated(Collection<String> arg0) {
// TODO Auto-generated method stub
//notification("entriesUpdated");
}
@Override
public void entriesDeleted(Collection<String> arg0) {
// TODO Auto-generated method stub
//notification("entriesDeleted");
}
@Override
public void entriesAdded(Collection<String> arg0) {
// TODO Auto-generated method stub
Iterator<String> it = arg0.iterator();
if (it.hasNext()) {
user = it.next();
}
/*RosterEntry entry = roster.getEntry(user);
if(entry.getType().toString().equalsIgnoreCase("to")){
int index_of_Alpha = user.indexOf("@");
String subID = user.substring(0, index_of_Alpha);
notification("Hi,"+subID+" wants to add you");
} */
}
};
if (roster != null) {
System.out.println("subscription going on");
roster.addRosterListener(r1);
}
} else {
showToast("Connection lost-", 0);
}
//Group Chat Invitation
MultiUserChat.addInvitationListener(connection, new InvitationListener() {
@Override
public void invitationReceived(Connection arg0, String arg1, String arg2,
String arg3, String arg4, Message arg5) {
// TODO Auto-generated method stub
System.out.println("Received");
notification("Invitation Received");
}
});
//presence check
connection.addPacketListener(new PacketListener() {
@Override
public void processPacket(Packet arg0) {
// TODO Auto-generated method stub
Presence presence = (Presence)arg0;
if(presence.getType().equals(Presence.Type.subscribe))
{
user = presence.getFrom();
int index_of_Alpha = user.indexOf("@");
subID = user.substring(0, index_of_Alpha);
/*Roster roster = connection.getRoster();
RosterEntry entry = roster.getEntry(user);*/
notification("Hi,"+subID+" wants to add you");
}
if(presence.getType().equals(Presence.Type.subscribed)){
Roster roster = connection.getRoster();
RosterEntry entry = roster.getEntry(user);
if(entry.getType().toString().equalsIgnoreCase("to")){
int index_of_Alpha = user.indexOf("@");
subID = user.substring(0, index_of_Alpha);
}
}
}
},new PacketTypeFilter(Presence.class));
PacketFilter filter = new MessageTypeFilter(Message.Type.chat);
final PacketCollector collector = connection.createPacketCollector(filter);
connection.addPacketListener(new PacketListener() {
@Override
public void processPacket(Packet packet) {
// TODO Auto-generated method stub
//notification(packet.getFrom());
packet = collector.nextResult();
Message message = (Message)packet;
senderName = packet.getFrom();
int alphaPOS = senderName.indexOf("@");
String subSenderName = senderName.substring(0,alphaPOS);
notificationforChat(subSenderName+": "+message.getBody(),packet.getFrom().toString());
}
}, filter);
/*while (true) {
Packet packet = collector.nextResult();
if (packet instance of Message) {
Message message = (Message) packet;
if (message != null && message.getBody() != null)
System.out.println("Received message from "
+ packet.getFrom() + " : "
+ (message != null ? message.getBody() : "NULL"));
notification(""+message.getBody());
}
}*/
}
protected void showToast(String msg, int time) {
Toast.makeText(this, msg, time).show();
}
private XMPPConnection getConnection() {
return CCMStaticVariable.CommonConnection;
}
这是停止服务的代码（LOGOUT代码）
if (CCMStaticVariable.CommonConnection.isConnected()) {
//super.onBackPressed();
final AlertDialog.Builder alertDialog = new AlertDialog.Builder(this);
alertDialog.setTitle("CCM Logout");
alertDialog.setMessage("Are you sure you want to logout?");
alertDialog.setIcon(R.drawable.ic_launcher);
//Ok button for Logout
alertDialog.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
CCMStaticVariable.CommonConnection.disconnect();
Intent serviceIntent = new Intent(UserMenuActivity.this,UpdaterService.class);
stopService(serviceIntent);
//CCMStaticVariable.CommonConnection.removeConnectionListener(arg0);
finish();
}
});
LOGCAT
10-30 14:53:00.189: D/dalvikvm(944): GC_CONCURRENT freed 919K, 55% free 3013K/6663K, external 2582K/2706K, paused 8ms+3ms
10-30 14:53:01.248: W/dalvikvm(944): threadid=10: thread exiting with uncaught exception (group=0x40015560)
10-30 14:53:01.278: E/AndroidRuntime(944): FATAL EXCEPTION: AsyncTask #2
10-30 14:53:01.278: E/AndroidRuntime(944): java.lang.RuntimeException: An error occured while executing doInBackground()
10-30 14:53:01.278: E/AndroidRuntime(944): at android.os.AsyncTask$3.done(AsyncTask.java:200)
10-30 14:53:01.278: E/AndroidRuntime(944): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:274)
10-30 14:53:01.278: E/AndroidRuntime(944): at java.util.concurrent.FutureTask.setException(FutureTask.java:125)
10-30 14:53:01.278: E/AndroidRuntime(944): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:308)
10-30 14:53:01.278: E/AndroidRuntime(944): at java.util.concurrent.FutureTask.run(FutureTask.java:138)
10-30 14:53:01.278: E/AndroidRuntime(944): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088)
10-30 14:53:01.278: E/AndroidRuntime(944): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581)
10-30 14:53:01.278: E/AndroidRuntime(944): at java.lang.Thread.run(Thread.java:1019)
10-30 14:53:01.278: E/AndroidRuntime(944): Caused by: java.lang.NullPointerException
10-30 14:53:01.278: E/AndroidRuntime(944): at org.jivesoftware.smackx.muc.MultiUserChat$1.connectionCreated(MultiUserChat.java:114)
10-30 14:53:01.278: E/AndroidRuntime(944): at org.jivesoftware.smack.XMPPConnection.initConnection(XMPPConnection.java:607)
10-30 14:53:01.278: E/AndroidRuntime(944): at org.jivesoftware.smack.XMPPConnection.connectUsingConfiguration(XMPPConnection.java:556)
10-30 14:53:01.278: E/AndroidRuntime(944): at org.jivesoftware.smack.XMPPConnection.connect(XMPPConnection.java:984)
10-30 14:53:01.278: E/AndroidRuntime(944): at com.cipl.CCM.frontend.XMPPConn.checkXMPPConnection(XMPPConn.java:51)
10-30 14:53:01.278: E/AndroidRuntime(944): at com.cipl.CCM.frontend.LoginActivity$LoginUserTask.doInBackground(LoginActivity.java:135)
10-30 14:53:01.278: E/AndroidRuntime(944): at com.cipl.CCM.frontend.LoginActivity$LoginUserTask.doInBackground(LoginActivity.java:1)
10-30 14:53:01.278: E/AndroidRuntime(944): at android.os.AsyncTask$2.call(AsyncTask.java:185)
10-30 14:53:01.278: E/AndroidRuntime(944): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:306)
10-30 14:53:01.278: E/AndroidRuntime(944): ... 4 more
10-30 14:53:01.878: E/WindowManager(944): Activity com.cipl.CCM.frontend.LoginActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@4063f7f8 that was originally added here
10-30 14:53:01.878: E/WindowManager(944): android.view.WindowLeaked: Activity com.cipl.CCM.frontend.LoginActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@4063f7f8 that was originally added here
10-30 14:53:01.878: E/WindowManager(944): at android.view.ViewRoot.<init>(ViewRoot.java:258)
10-30 14:53:01.878: E/WindowManager(944): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:148)
10-30 14:53:01.878: E/WindowManager(944): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91)
10-30 14:53:01.878: E/WindowManager(944): at android.view.Window$LocalWindowManager.addView(Window.java:424)
10-30 14:53:01.878: E/WindowManager(944): at android.app.Dialog.show(Dialog.java:241)
10-30 14:53:01.878: E/WindowManager(944): at com.cipl.CCM.frontend.LoginActivity$LoginUserTask.onPreExecute(LoginActivity.java:130)
10-30 14:53:01.878: E/WindowManager(944): at android.os.AsyncTask.execute(AsyncTask.java:391)
10-30 14:53:01.878: E/WindowManager(944): at com.cipl.CCM.frontend.LoginActivity$1.onClick(LoginActivity.java:62)
10-30 14:53:01.878: E/WindowManager(944): at android.view.View.performClick(View.java:2485)
10-30 14:53:01.878: E/WindowManager(944): at android.view.View$PerformClick.run(View.java:9080)
10-30 14:53:01.878: E/WindowManager(944): at android.os.Handler.handleCallback(Handler.java:587)
10-30 14:53:01.878: E/WindowManager(944): at android.os.Handler.dispatchMessage(Handler.java:92)
10-30 14:53:01.878: E/WindowManager(944): at android.os.Looper.loop(Looper.java:123)
10-30 14:53:01.878: E/WindowManager(944): at android.app.ActivityThread.main(ActivityThread.java:3683)
10-30 14:53:01.878: E/WindowManager(944): at java.lang.reflect.Method.invokeNative(Native Method)
10-30 14:53:01.878: E/WindowManager(944): at java.lang.reflect.Method.invoke(Method.java:507)
10-30 14:53:01.878: E/WindowManager(944): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
10-30 14:53:01.878: E/WindowManager(944): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
10-30 14:53:01.878: E/WindowManager(944): at dalvik.system.NativeStart.main(Native Method)
登录活动
public class LoginActivity extends Activity {
/** Variable define here. */
private EditText metLoginUserName, metLoginPassword;
private Button mbtnLogin;
private ImageView ivRegister;
private String Host, username, password;
private int Port;
private UserChatActivity xmppClient;
public static ArrayList<String> all_user = new ArrayList<String>();
public static CustomProgressDialog mCustomProgressDialog;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.loginlayout);
metLoginUserName = (EditText) this.findViewById(R.id.etLoginUserName);
metLoginPassword = (EditText) this.findViewById(R.id.etLoginPassword);
mbtnLogin = (Button) findViewById(R.id.btnLogin);
ivRegister = (ImageView) findViewById(R.id.ivRegister);
/** Set the hint in username and password edittext */
metLoginUserName = CCMStaticMethod.setHintEditText(metLoginUserName,
getString(R.string.hint_username), true);
metLoginPassword = CCMStaticMethod.setHintEditText(metLoginPassword,
getString(R.string.hint_password), true);
/** Click on login button */
mbtnLogin.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
/** Login Activity */
username = metLoginUserName.getText().toString();
password = metLoginPassword.getText().toString();
CCMStaticVariable.musername = username;
CCMStaticVariable.musername = password;
if(CCMStaticMethod.isInternetAvailable(LoginActivity.this)){
LoginUserTask loginUserTask = new LoginUserTask(v.getContext());
loginUserTask.execute();
}
}
});
/** Click on forgot button */
this.findViewById(R.id.ivForgot).setOnClickListener(
new OnClickListener() {
@Override
public void onClick(View v) {
startActivity(new Intent(LoginActivity.this,
ForgotPassActivity.class));
}
});
/** Click on register button */
ivRegister.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
startActivity(new Intent(LoginActivity.this,
RegisterActivity.class));
}
});
}
public class LoginUserTask extends AsyncTask<Void, Void, XMPPConnection> {
public LoginUserTask(Context context) {
super();
this.context = context;
}
private Context context;
@Override
protected void onPostExecute(XMPPConnection result) {
if (result != null) {
/**Start services*/
startService(new Intent(LoginActivity.this, UpdaterService.class));
/**Call user menu activity*/
//finish();
LoginActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
startActivity(new Intent(LoginActivity.this,UserMenuActivity.class));
}
});
} else {
DialogInterface.OnClickListener LoginUnSuccessOkAlertListener = new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
}
};
CCMStaticMethod.showAlert(context, "Login",
"Invalid Username or Password. Try Again !", R.drawable.unsuccess,
true, true, "Ok", LoginUnSuccessOkAlertListener, null,
null);
}
mCustomProgressDialog.dismiss();
}
@Override
protected void onPreExecute() {
mCustomProgressDialog = CustomProgressDialog.createDialog(
LoginActivity.this, "", "");
mCustomProgressDialog.show();
}
@Override
protected XMPPConnection doInBackground(Void... params) {
CCMStaticVariable.CommonConnection = XMPPConn.checkXMPPConnection(username,
password);
return CCMStaticVariable.CommonConnection;
}
}
请让我知道我的错误是什么或如何解决？