Android SQLite-表“&引用；没有名为“…”的列&引用；

我得到了列出的错误，并仔细查看了代码，要么没有发现错误，要么没有任何错误，代码只是一个混蛋，但这是我的数据库处理程序类。。我尝试过更新数据库版本号，卸载应用程序，但两种方法都不起作用。谢谢

import java.util.ArrayList;
import java.util.List;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;

public class DatabaseHandler extends SQLiteOpenHelper {

    // All Static variables
    // Database Version
    private static final int DATABASE_VERSION = 2;

    // Database Name
    private static final String DATABASE_NAME = "loginManager";

    // Contacts table name
    private static final String TABLE_CONTACTS = "loginTable";

    // Contacts Table Columns names
    private static final String KEY_ID = "id";
    private static final String KEY_NAME = "name";
    private static final String KEY_PASSWORD = "password";
    private static final String KEY_QUESTION = "question";
    private static final String KEY_ANSWER = "answer";

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

    // Creating Tables
    @Override
    public void onCreate(SQLiteDatabase db) {
        String CREATE_CONTACTS_TABLE = "CREATE TABLE " + TABLE_CONTACTS + "("
                + KEY_ID + " INTEGER PRIMARY KEY,"
                + KEY_NAME + " TEXT,"
                + KEY_PASSWORD + " TEXT"
                + KEY_QUESTION + " TEXT"
                + KEY_ANSWER + " TEXT" + ")";
        db.execSQL(CREATE_CONTACTS_TABLE);
    }

    // Upgrading database
    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        // Drop older table if existed
        db.execSQL("DROP TABLE IF EXISTS " + TABLE_CONTACTS);

        // Create tables again
        onCreate(db);
    }

    /**
     * All CRUD(Create, Read, Update, Delete) Operations
     */

    // Adding new contact
    void addContact(Contact contact) {
        SQLiteDatabase db = this.getWritableDatabase();

        ContentValues values = new ContentValues();
        values.put(KEY_NAME, contact.getName()); // Contact Name
        values.put(KEY_PASSWORD, contact.getPassword());
        values.put(KEY_QUESTION, contact.getQuestion());
        values.put(KEY_ANSWER, contact.getAnswer());

        // Inserting Row
        db.insert(TABLE_CONTACTS, null, values);
        db.close(); // Closing database connection
    }

    // Getting single contact
    Contact getContact(int id) {
        SQLiteDatabase db = this.getReadableDatabase();

        Cursor cursor = db.query(TABLE_CONTACTS, new String[] { KEY_ID,
                KEY_NAME, KEY_PASSWORD, KEY_QUESTION, KEY_ANSWER }, KEY_ID + "=?",
                new String[] { String.valueOf(id) }, null, null, null, null);
        if (cursor != null)
            cursor.moveToFirst();

        Contact contact = new Contact(Integer.parseInt(cursor.getString(0)),
                cursor.getString(1), cursor.getString(2), cursor.getString(3), cursor.getString(4));
        // return contact
        return contact;
    }

    // Getting All Contacts
    public List<Contact> getAllContacts() {
        List<Contact> contactList = new ArrayList<Contact>();
        // Select All Query
        String selectQuery = "SELECT  * FROM " + TABLE_CONTACTS;

        SQLiteDatabase db = this.getWritableDatabase();
        Cursor cursor = db.rawQuery(selectQuery, null);

        // looping through all rows and adding to list
        if (cursor.moveToFirst()) {
            do {
                Contact contact = new Contact();
                contact.setID(Integer.parseInt(cursor.getString(0)));
                contact.setName(cursor.getString(1));
                contact.setPassword(cursor.getString(2));
                contact.setQuestion(cursor.getString(3));
                contact.setAnswer(cursor.getString(4));

                // Adding contact to list
                contactList.add(contact);
            } while (cursor.moveToNext());
        }

        // return contact list
        return contactList;
    }

    // Updating single contact
    public int updateContact(Contact contact) {
        SQLiteDatabase db = this.getWritableDatabase();

        ContentValues values = new ContentValues();
        values.put(KEY_NAME, contact.getName());
        values.put(KEY_PASSWORD, contact.getPassword());
        values.put(KEY_QUESTION, contact.getQuestion());
        values.put(KEY_ANSWER, contact.getAnswer());

        // updating row
        return db.update(TABLE_CONTACTS, values, KEY_ID + " = ?",
                new String[] { String.valueOf(contact.getID()) });
    }

    // Deleting single contact
    public void deleteContact(Contact contact) {
        SQLiteDatabase db = this.getWritableDatabase();
        db.delete(TABLE_CONTACTS, KEY_ID + " = ?",
                new String[] { String.valueOf(contact.getID()) });
        db.close();
    }


    // Getting contacts Count
    public int getContactsCount() {
        String countQuery = "SELECT * FROM " + TABLE_CONTACTS;
        SQLiteDatabase db = this.getReadableDatabase();
        Cursor cursor = db.rawQuery(countQuery, null);
        cursor.close();

        // return count
        return cursor.getCount();
    }

}

LogCat

11-07 12:30:55.151: E/SQLiteLog(32200): (1) table loginTable has no column named answer
11-07 12:30:55.161: E/SQLiteDatabase(32200): Error inserting answer=answer question=question password=pass name=name
11-07 12:30:55.161: E/SQLiteDatabase(32200): android.database.sqlite.SQLiteException: table loginTable has no column named answer (code 1): , while compiling: INSERT INTO loginTable(answer,question,password,name) VALUES (?,?,?,?)
11-07 12:30:55.161: E/SQLiteDatabase(32200):    at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
11-07 12:30:55.161: E/SQLiteDatabase(32200):    at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:1118)
11-07 12:30:55.161: E/SQLiteDatabase(32200):    at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:691)
11-07 12:30:55.161: E/SQLiteDatabase(32200):    at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
11-07 12:30:55.161: E/SQLiteDatabase(32200):    at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
11-07 12:30:55.161: E/SQLiteDatabase(32200):    at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:31)
11-07 12:30:55.161: E/SQLiteDatabase(32200):    at android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1589)
11-07 12:30:55.161: E/SQLiteDatabase(32200):    at android.database.sqlite.SQLiteDatabase.insert(SQLiteDatabase.java:1461)
11-07 12:30:55.161: E/SQLiteDatabase(32200):    at com.example.duradoornfc.DatabaseHandler.addContact(DatabaseHandler.java:72)
11-07 12:30:55.161: E/SQLiteDatabase(32200):    at com.example.duradoornfc.CreateUserActivity.addUser(CreateUserActivity.java:135)
11-07 12:30:55.161: E/SQLiteDatabase(32200):    at com.example.duradoornfc.CreateUserActivity.action_Click(CreateUserActivity.java:91)
11-07 12:30:55.161: E/SQLiteDatabase(32200):    at java.lang.reflect.Method.invokeNative(Native Method)
11-07 12:30:55.161: E/SQLiteDatabase(32200):    at java.lang.reflect.Method.invoke(Method.java:525)
11-07 12:30:55.161: E/SQLiteDatabase(32200):    at android.view.View$1.onClick(View.java:3833)
11-07 12:30:55.161: E/SQLiteDatabase(32200):    at android.view.View.performClick(View.java:4475)
11-07 12:30:55.161: E/SQLiteDatabase(32200):    at android.view.View$PerformClick.run(View.java:18786)
11-07 12:30:55.161: E/SQLiteDatabase(32200):    at android.os.Handler.handleCallback(Handler.java:730)
11-07 12:30:55.161: E/SQLiteDatabase(32200):    at android.os.Handler.dispatchMessage(Handler.java:92)
11-07 12:30:55.161: E/SQLiteDatabase(32200):    at android.os.Looper.loop(Looper.java:137)
11-07 12:30:55.161: E/SQLiteDatabase(32200):    at android.app.ActivityThread.main(ActivityThread.java:5419)
11-07 12:30:55.161: E/SQLiteDatabase(32200):    at java.lang.reflect.Method.invokeNative(Native Method)
11-07 12:30:55.161: E/SQLiteDatabase(32200):    at java.lang.reflect.Method.invoke(Method.java:525)
11-07 12:30:55.161: E/SQLiteDatabase(32200):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1187)
11-07 12:30:55.161: E/SQLiteDatabase(32200):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1003)
11-07 12:30:55.161: E/SQLiteDatabase(32200):    at dalvik.system.NativeStart.main(Native Method)

11-07 12:30:55.151:E/SQLiteLog（32200）：（1）表loginTable没有名为answer的列
11-07 12:30:55.161:E/SQLiteDatabase（32200）：插入答案时出错=答案问题=问题密码=通行证名称=名称
11-07 12:30:55.161:E/SQLiteDatabase（32200）：android.database.sqlite.SQLiteException:表loginTable没有名为answer（代码1）的列，编译时：插入loginTable（答案、问题、密码、名称）值（？，，，？）
11-07 12:30:55.161:E/SQLiteDatabase（32200）：位于android.database.sqlite.SQLiteConnection.nativepreparest陈述（本机方法）
11-07 12:30:55.161:E/SQLiteDatabase（32200）：位于android.database.sqlite.SQLiteConnection.acquiredpreparedstatement（SQLiteConnection.java:1118）
11-07 12:30:55.161:E/SQLiteDatabase（32200）：在android.database.sqlite.SQLiteConnection.prepare（SQLiteConnection.java:691）
11-07 12:30:55.161:E/SQLiteDatabase（32200）：在android.database.sqlite.SQLiteSession.prepare（SQLiteSession.java:588）
11-07 12:30:55.161:E/SQLiteDatabase（32200）：位于android.database.sqlite.SQLiteProgram.（SQLiteProgram.java:58）
11-07 12:30:55.161:E/SQLiteDatabase（32200）：位于android.database.sqlite.SQLiteStatement.（SQLiteStatement.java:31）
11-07 12:30:55.161:E/SQLiteDatabase（32200）：位于android.database.sqlite.SQLiteDatabase.insertWithOnConflict（SQLiteDatabase.java:1589）
11-07 12:30:55.161:E/SQLiteDatabase（32200）：位于android.database.sqlite.SQLiteDatabase.insert（SQLiteDatabase.java:1461）
11-07 12:30:55.161:E/SQLiteDatabase（32200）：位于com.example.duradoornfc.DatabaseHandler.addContact（DatabaseHandler.java:72）
11-07 12:30:55.161:E/SQLiteDatabase（32200）：位于com.example.duradoornfc.CreateUserActivity.addUser（CreateUserActivity.java:135）
11-07 12:30:55.161:E/SQLiteDatabase（32200）：在com.example.duradoornfc.CreateUserActivity.action上单击（CreateUserActivity.java:91）
11-07 12:30:55.161:E/SQLiteDatabase（32200）：位于java.lang.reflect.Method.invokenactive（本机方法）
11-07 12:30:55.161:E/SQLiteDatabase（32200）：位于java.lang.reflect.Method.invoke（Method.java:525）
11-07 12:30:55.161:E/SQLiteDatabase（32200）：在android.view.view$1.onClick（view.java:3833）
11-07 12:30:55.161:E/SQLiteDatabase（32200）：在android.view.view.performClick（view.java:4475）
11-07 12:30:55.161:E/SQLiteDatabase（32200）：位于android.view.view$PerformClick.run（view.java:18786）
11-07 12:30:55.161:E/SQLiteDatabase（32200）：位于android.os.Handler.handleCallback（Handler.java:730）
11-07 12:30:55.161:E/SQLiteDatabase（32200）：位于android.os.Handler.dispatchMessage（Handler.java:92）
11-07 12:30:55.161:E/SQLiteDatabase（32200）：位于android.os.Looper.loop（Looper.java:137）
11-07 12:30:55.161:E/SQLiteDatabase（32200）：位于android.app.ActivityThread.main（ActivityThread.java:5419）
11-07 12:30:55.161:E/SQLiteDatabase（32200）：位于java.lang.reflect.Method.invokenactive（本机方法）
11-07 12:30:55.161:E/SQLiteDatabase（32200）：位于java.lang.reflect.Method.invoke（Method.java:525）
11-07 12:30:55.161:E/SQLiteDatabase（32200）：位于com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run（ZygoteInit.java:1187）
11-07 12:30:55.161:E/SQLiteDatabase（32200）：位于com.android.internal.os.ZygoteInit.main（ZygoteInit.java:1003）
11-07 12:30:55.161:E/SQLiteDatabase（32200）：位于dalvik.system.NativeStart.main（本机方法）

您的create语句中缺少一些COMA：

    String CREATE_CONTACTS_TABLE = "CREATE TABLE " + TABLE_CONTACTS + "("
            + KEY_ID + " INTEGER PRIMARY KEY,"
            + KEY_NAME + " TEXT,"
            + KEY_PASSWORD + " TEXT,"
            + KEY_QUESTION + " TEXT,"
            + KEY_ANSWER + " TEXT" + ")";

---

在更改数据库结构后，请记住更改数据库版本。

请发布您的日志。已添加日志。

    String CREATE_CONTACTS_TABLE = "CREATE TABLE " + TABLE_CONTACTS + "("
            + KEY_ID + " INTEGER PRIMARY KEY,"
            + KEY_NAME + " TEXT,"
            + KEY_PASSWORD + " TEXT,"
            + KEY_QUESTION + " TEXT,"
            + KEY_ANSWER + " TEXT" + ")";