Question

我是android的新手，正在创建第一个创建数据库的应用程序。我想在单击保存按钮时将数据添加到我的数据库。但是我收到了一个错误。

我的logcat说

"12-09 12:15:41.204: ERROR/Database(565): Failure 1 (near "AUTO": syntax error) on 0x12f148 when preparing 'CREATE TABLE GoalTable (_id INTEGER PRIMARY KEY AUTO INCREMENT, goals_title TEXT NOT NULL, start_date TEXT NOT NULL, target_date TEXT NOT NULL, reminder_date TEXT NOT NULL,);'.".

请帮我找错。感谢。

Database.java

package com.firstproject.aditya;

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

public class Database {

    public static final String KEY_ROWID = "_id";
    public static final String KEY_TITLE = "goals_title";
    public static final String KEY_STDATE = "start_date";
    public static final String KEY_TGDATE = "target_date";
    public static final String KEY_RDDATE = "reminder_date";

    private static final String DATABASE_NAME = "GoalInformation";
    private static final String DATABASE_TABLE = "GoalTable";
    private static final int DATABASE_VERSION = 1;


    private DbHelper ourHelper;
    private final Context ourContext;
    private android.database.sqlite.SQLiteDatabase ourDatabase;

    private static class DbHelper extends SQLiteOpenHelper {

        public DbHelper(Context context) {
            super(context, DATABASE_NAME, null, DATABASE_VERSION);
            // TODO Auto-generated constructor stub
        }

        @Override
        public void onCreate(android.database.sqlite.SQLiteDatabase db) {
            // TODO Auto-generated method stub
            db.execSQL("CREATE TABLE " + DATABASE_TABLE + " (" + KEY_ROWID
                    + " INTEGER PRIMARY KEY AUTO INCREMENT, " + KEY_TITLE
                    + " TEXT NOT NULL, " + KEY_STDATE + " TEXT NOT NULL, "
                    + KEY_TGDATE + " TEXT NOT NULL, " + KEY_RDDATE
                    + " TEXT NOT NULL);"

            );
        }

        @Override
        public void onUpgrade(android.database.sqlite.SQLiteDatabase db,
                int oldVersion, int newVersion) {
            // TODO Auto-generated method stub
            db.execSQL("DROP TABLE IF EXISTS " + DATABASE_TABLE);
            onCreate(db);
        }

    }

    public Database(Context c) {
        ourContext = c;
    }

    public Database open() throws SQLException {
        ourHelper = new DbHelper(ourContext);
        ourDatabase = ourHelper.getWritableDatabase();
        return this;
    }

    public void close() {
        ourHelper.close();
    }

    public long createEntry(String gTitle, String dateS, String dateT,
            String dateR) {
        // TODO Auto-generated method stub
        ContentValues cv = new ContentValues();
        cv.put(KEY_TITLE, gTitle);
        cv.put(KEY_STDATE, dateS);
        cv.put(KEY_TGDATE, dateT);
        cv.put(KEY_RDDATE, dateR);
        return ourDatabase.insert(DATABASE_TABLE, null, cv);
    }

    public String getData() {
        // TODO Auto-generated method stub
        String[] columns = new String[] { KEY_ROWID, KEY_TITLE, KEY_STDATE,
                KEY_TGDATE, KEY_RDDATE };
        Cursor c = ourDatabase.query(DATABASE_TABLE, columns, null, null, null,
                null, null);
        String result = "";

        int iRow = c.getColumnIndex(KEY_ROWID);
        int iTitle = c.getColumnIndex(KEY_TITLE);
        int iStdate = c.getColumnIndex(KEY_STDATE);
        int iTgdate = c.getColumnIndex(KEY_TGDATE);
        int iRddate = c.getColumnIndex(KEY_RDDATE);

        for (c.moveToFirst(); !c.isAfterLast(); c.moveToNext()) {
            result = result + c.getString(iRow) + " " + c.getString(iTitle)
                    + " " + c.getString(iStdate) + " " + c.getString(iTgdate)
                    + " " + c.getString(iRddate) + "\n";
        }

        return result;
    }
}

Answer 1

AUTO和INCREMENT之间不应有空格。它应该是AUTOINCREMENT

Answer 2

AUTO INCREMENT之间不应有空格，应为AUTOINCREMENT

Answer 3

onCreate语句中存在语法错误。查看语句的最后一部分，将“符号放在里面”，即+“TEXT NOT NULL”）;

在SQLite数据库中创建和添加数据时出错

3 个答案: