Error with spinner

There is an error when i run my android program.

My Booking.java

package one.two;

import android.app.ListActivity;
import android.database.Cursor;
import android.os.Bundle;
import android.widget.SimpleCursorAdapter;
import android.widget.Spinner;

public class Booking extends ListActivity
{
    private DBAdapter db; 

    /** Called when the activity is first created. */
    public void onCreate(Bundle savedInstanceSta开发者_如何学Pythonte) {

        super.onCreate(savedInstanceState);
        db = new DBAdapter(this);
        db.open();
        setContentView(R.layout.main);
        long id; 
        id = db.insertTime(
        new String("08:00")); 
        Cursor spinnerCursor = db.getSpinnerData(); 
        startManagingCursor(spinnerCursor);
        Spinner colourSpinner = (Spinner) findViewById(R.id.spinner);
        /*Create an array to specify the fields we want to display in the list (only the 'colourName' column in this case) */

        /*  String[] from = new String[]{DBAdapter.KEY_ARRIVAL}; 
        /* and an array of the fields we want to bind those fields to (in this case just the textView 'tvDBViewRow' from our new db_view_row.xml layout above) 
        int[] to = new int[]{R.id.bookingtxt1};

         Now create a simple cursor adapter.. 
        SimpleCursorAdapter colourAdapter =
        new SimpleCursorAdapter(this, R.layout.booking, spinnerCursor, from, to);
        colourSpinner.setAdapter(colourAdapter);*/

    }

}

DBAdapter.java

    package one.two;


    import java.io.IOException;

    import android.content.ContentValues;
    import android.content.Context;
    import android.database.Cursor;
    import android.database.SQLException;
    import android.database.sqlite.SQLiteDatabase;
    import android.database.sqlite.SQLiteException;
    import android.database.sqlite.SQLiteOpenHelper;
    import android.util.Log;

    public class DBAdapter {   
        private static String DB_PATH = "/data/data/one.two/databases/"; 
        private static String DB_NAME = "irsyad";

        //values for the login table
        public static final String KEY_ROWID = "_id";
        public static final String KEY_USERNAME = "Username";
        public static final String KEY_PASSWORD = "Password";
        public static final String KEY_LNAME = "LastName";
        public static final String KEY_FNAME ="FirstName";

        public static final String KEY_ROWID2 = "_id";
        public static final String KEY_STATUS = "status";
        public static final String KEY_DESTINATION = "destination";
        public static final String KEY_ARRIVAL = "arrival";
        public static final String KEY_FERRY ="ferry";

        private static final String TAG = "DBAdapter";

        //declare Database name, tables names
        private static final String DATABASE_NAME = "irsyad";
        private static final String DATABASE_TABLE = "User";
        private static final String DATABASE_TABLE_2 = "port";
        private static final int DATABASE_VERSION = 1;

        //declares the rules for the database tables
        private static final String DATABASE_CREATE =
            "create table user (_id integer primary key autoincrement, "
            + "Username text not null, Password text not null,"
            + "LastName text not null, FirstName text not null);";

        private static final String DATABASE_CREATE_2 =
            "create table port (_id integer primary key autoincrement, "
            + "status text not null, destination text not null,"
            + "arrival text not null, ferry text not null);";

        private final Context context; 

        private DatabaseHelper DBHelper;
        private SQLiteDatabase db;

        public DBAdapter(Context ctx) {
            this.context = ctx;
            DBHelper = new DatabaseHelper(context);
        }

        private static class DatabaseHelper extends SQLiteOpenHelper {

            DatabaseHelper(Context context) {
                super(context, DATABASE_NAME, null, DATABASE_VERSION);
            }

            //Create the tables with the rules we set.
            @Override
            public void onCreate(SQLiteDatabase db) {
                db.execSQL(DATABASE_CREATE);
                db.execSQL(DATABASE_CREATE_2);
            }

            //OnUpgrade is only for use when u changed the database's version to 2 etc.
            @Override
            public void onUpgrade(SQLiteDatabase db, int oldVersion, 
            int newVersion) {
                Log.w(TAG, "Upgrading database from version " + oldVersion 
                        + " to "
                        + newVersion + ", which will destroy all old data");
                db.execSQL("DROP TABLE IF EXISTS port");
                onCreate(db);
            }
        }    

        //---opens the database---
        public DBAdapter open() throws SQLException {
            db = DBHelper.getWritableDatabase();
            return this;
        }

        //---closes the database---    
        public void close() {
            DBHelper.close();
        }

        //Method for inserting login details, can be used in other java files when DBAdapter is
        //declared in the java file. e.g. DBAdapter db = new DBAdapter(this);
        public long insertUser(String Username, String Password, String LastName, String FirstName) {
            ContentValues initialValues = new ContentValues();
            initialValues.put(KEY_USERNAME, Username);
            initialValues.put(KEY_PASSWORD, Password);
            initialValues.put(KEY_LNAME, LastName);
            initialValues.put(KEY_FNAME, FirstName);
            return db.insert(DATABASE_TABLE, null, initialValues);
        }

        //---deletes a particular title---
        public boolean deleteUser(long rowId) {
            return db.delete(DATABASE_TABLE, KEY_ROWID + 
                    "=" + rowId, null) > 0;
        }

        public long insertTime(String arrival) { 
           ContentValues initialValue = new ContentValues(); 
           initialValue.put(KEY_ARRIVAL, arrival); 
           return db.insert(DATABASE_TABLE_2, null, initialValue); 
        }
        //method for retrieving all the inputs from database
        public Cursor getAllUser() {
            return db.query(DATABASE_TABLE, new String[] {
                    KEY_ROWID, 
                    KEY_USERNAME,
                    KEY_PASSWORD,
                    KEY_LNAME,
                    KEY_FNAME,},
                    null, 
                    null, 
                    null, 
                    null, 
                    null);
        }   

        public Cursor getAllData() {
            return db.query(DATABASE_TABLE_2, new String[] {
                    KEY_ROWID2, 
                    KEY_STATUS,
                    KEY_DESTINATION,
                    KEY_ARRIVAL,
                    KEY_FERRY,},
                    null, 
                    null, 
                    null, 
                    null, 
                    null);
        }   

        //---retrieves a particular title---
        public Cursor getUser(long rowId) throws SQLException {
            Cursor mCursor =
                    db.query(true, DATABASE_TABLE, new String[] {
                            KEY_ROWID,
                            KEY_USERNAME, 
                            KEY_PASSWORD,
                            KEY_LNAME,
                            KEY_FNAME,}, 
                            KEY_ROWID + "=" + rowId, 
                            null,
                            null, 
                            null, 
                            null, 
                            null);
            if (mCursor != null) {
                mCursor.moveToFirst();
            }
            return mCursor;
        }

        public Cursor getSpinnerData() throws SQLException {
            Cursor mCursor =
                    db.query(DATABASE_TABLE_2, new String[] {               
                            KEY_ARRIVAL,}, 
                            null,
                            null, 
                            null, 
                            null, 
                            null);
            if (mCursor != null) {
                mCursor.moveToFirst();
            }
            return mCursor;
        }

        //---updates a title---
        public boolean updateUser(long rowId, String Username, String Password, String LastName, String FirstName) {
            ContentValues args = new ContentValues();
            args.put(KEY_USERNAME, Username);
            args.put(KEY_PASSWORD, Password);
            args.put(KEY_LNAME, LastName);
            args.put(KEY_FNAME, FirstName);
            return db.update(DATABASE_TABLE, args, 
                             KEY_ROWID + "=" + rowId, null) > 0;
        }

        private boolean checkDataBase() {

            SQLiteDatabase checkDB = null;

            try {
                String myPath = DB_PATH + DB_NAME;
                checkDB = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READWRITE);

            }
            catch(SQLiteException e) {
                //database does't exist yet.
            }

            if(checkDB != null) {
                checkDB.close();
            }

            return checkDB != null ? true : false;
        }

        public void createDataBase() throws IOException {

            boolean dbExist = checkDataBase();

            if(dbExist) {
                //do nothing - database already exist
            }
            else {
                 db.execSQL(DATABASE_CREATE);
                 db.execSQL(DATABASE_CREATE_2);

            }
        }
    }

Error log

08-29 07:01:55.966: ERROR/Database(994): Error inserting arrival=08:00
08-29 07:01:55.966: ERROR/Database(994): android.database.sqlite.SQLiteConstraintException: error code 19: constraint failed
08-29 07:01:55.966: ERROR/Database(994):     at android.database.sqlite.SQLiteStatement.native_execute(Native Method)
08-29 07:01:55.966: ERROR/Database(994):     at android.database.sqlite.SQLiteStatement.execute(SQLiteStatement.java:66)
08-29 07:01:55.966: ERROR/Database(994):     at android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1313)
08-29 07:01:55.966: ERROR/Database(994):     at android.database.sqlite.SQLiteDatabase.insert(SQLiteDatabase.java:1173)
08-29 07:01:55.966: ERROR/Database(994):     at one.two.DBAdapter.insertTime(DBAdapter.java:126)
08-29 07:01:55.966: ERROR/Database(994):     at one.two.Booking.onCreate(Booking.java:22)
08-29 07:01:55.966: ERROR/Database(994):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1123)
08-29 07:01:55.966: ERROR/Database(994):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2231)
08-29 07:01:55.966: ERROR/Database(994):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2284)
08-29 07:01:55.966: ERROR/Database(994):     at android.app.ActivityThread.access$1800(ActivityThread.java:112)
08-29 07:01:55.966: ERROR/Database(994):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1692)
08-29 07:01:55.966: ERROR/Database(994):     at android.os.Handler.dispatchMessage(Handler.java:99)
08-29 07:01:55.966: ERROR/Database(994):     at android.os.Looper.loop(Looper.java:123)
08-29 07:01:55.966: ERROR/Database(994):     at android.app.ActivityThread.main(ActivityThread.java:3948)
08-29 07:01:55.966: ERROR/Database(994):     at java.lang.reflect.Method.invokeNative(Native Method)
08-29 07:01:55.966: ERROR/Database(994):     at java.lang.reflect.Method.invoke(Method.java:521)
08-29 07:01:55.966: ERROR/Database(994):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:782)
08-29 07:01:55.966: ERROR/Database(994):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:540)
08-29 07:01:55.966: ERROR/Database(994):     at dalvik.system.NativeStart.main(Native Method)

Try replacing :
return db.insert(DATABASE_TABLE, null, initialValues); by this : return db.insert(DATABASE_TABLE, KEY_USERNAME, initialValues);

I think I remember having trouble passing null in the nullColumnHack paramater.