我的應用程序無法創建簡單的表格。請看下面的代碼,無法在android中創建表格
DatabaseHandler.java
public class DatabaseHandler extends SQLiteOpenHelper {
private static final int DB_VERSION = 1;
private static final String DB_NAME = "PASSENGER_INFO_DB";
private static final String TABLE_NAME = "PASSENGER_INFO";
private static final String TABLE_COLUMN_SEAT_NO = "SEAT_NO";
private static final String TABLE_COLUMN_NAME = "NAME";
private static final String TABLE_COLUMN_AGE = "AGE";
private static final String TABLE_COLUMN_GENDER = "GENDER";
private static final String TABLE_COLUMN_FOOD_PREF = "FOOD_PREF";
private static final String CREATE_PASSENGER_INFO_TABLE = "CREATE TABLE IF NOT EXISTS "
+ TABLE_NAME + " (" + TABLE_COLUMN_SEAT_NO
+ " TEXT PRIMARY KEY, " + TABLE_COLUMN_NAME + " TEXT, "
+ TABLE_COLUMN_AGE + " INTEGER, " + TABLE_COLUMN_GENDER
+ " INTEGER, " + TABLE_COLUMN_FOOD_PREF + " TEXT" + ")";
public DatabaseHandler(Context context) {
super(context, DB_NAME, null, DB_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL(CREATE_PASSENGER_INFO_TABLE);
}
public void addPassengerInfo(PassengerInfo passInfo) {
SQLiteDatabase addPass = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(TABLE_COLUMN_SEAT_NO, passInfo.getM_seatNo());
values.put(TABLE_COLUMN_NAME, passInfo.getM_name());
values.put(TABLE_COLUMN_AGE, passInfo.getM_age());
values.put(TABLE_COLUMN_GENDER, passInfo.getM_gender());
values.put(TABLE_COLUMN_FOOD_PREF, passInfo.getM_foodPref());
addPass.insert(TABLE_NAME, null, values);
addPass.close();
}
在MainActivity.java
DatabaseHandler dbhandler = new DatabaseHandler(this);
addSeat = "1A";
passName = "NA";
passAge = 0;
passGender = -1;
passFoodPref = "NA";
dbhandler.addPassengerInfo(new PassengerInfo(addSeat, passName, passAge, passGender, passFoodPref));
(PassengerInfo.class具有領域getter和setter方法)
當我運行這個我得到以下錯誤logcat,
01-23 19:09:18.311: I/Database(1303): sqlite returned: error code = 1, msg = table PASSENGER_INFO has no column named SEAT_NO
01-23 19:09:18.370: E/Database(1303): Error inserting FOOD_PREF=NA NAME=NA AGE=0 GENDER=-1 SEAT_NO=1A
我也檢查過通過adb外殼在數據庫中創建的表,沒有名爲PASSENGER_INFO的表。 請幫忙!
必須有一個名爲PASSENGER_INFO的表,因爲錯誤消息明確指出。你在哪裏尋找數據庫? –
您是否在表格中添加了「_id」列? –
請參閱http://stackoverflow.com/questions/10349337/creating-tables-in-sqlite-database-on-android –