[英]Ormlite database helper - onCreate() not called
I am using ormlite.android.4.31.jar I have typical DatabaseHelper 我正在使用ormlite.android.4.31.jar我有典型的DatabaseHelper
public class DatabaseHelper extends OrmLiteSqliteOpenHelper {
private static final String DATABASE_NAME = "realestate.db";
private static final int DATABASE_VERSION = 1;
private Dao<TabKraj, Integer> krajDao;
public DatabaseHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase sqliteDatabase, ConnectionSource connectionSource) {
try {
TableUtils.createTable(connectionSource, TabKraj.class);
initData();
} catch (Exception e) {
Log.e(DatabaseHelper.class.getName(), "Unable to create datbases", e);
}
}
@Override
public void onUpgrade(SQLiteDatabase sqliteDatabase, ConnectionSource connectionSource, int oldVer, int newVer) {
try {
TableUtils.dropTable(connectionSource, TabKraj.class, true);
onCreate(sqliteDatabase, connectionSource);
} catch (SQLException e) {
Log.e(DatabaseHelper.class.getName(), "Unable to upgrade database from version " + oldVer + " to new " + newVer, e);
}
}
public Dao<TabKraj, Integer> getKrajDao() throws SQLException{
if (krajDao == null) {
krajDao = getDao(TabKraj.class);
}
return krajDao;
}
private void initData(){
Log.d(Constants.DEBUG_TAG, "data initiating");
TabKraj k1 = new TabKraj();
TabKraj k2 = new TabKraj();
k1.setNazov("Kosicky kraj");
k1.setId(1);
try {
getKrajDao().create(k1);
} catch (SQLException e) {
Log.e(Constants.DEBUG_TAG, "Data initialing ERROR");
}
}
}
app is uninstalled, data cleared ... I am running app in debug mode from eclipse, constructor of DatabaseHleper
is called but onCreate()
is not called. 应用程序已卸载,数据已清除...我正在从eclipse以调试模式运行应用程序,调用
DatabaseHleper
构造函数但未调用onCreate()
。
Where could the problem be? 问题出在哪里?
As @k-mera said: 正如@ k-mera所说:
Database file will be created only if you did some operations in Database like "insert" . 只有在数据库中执行某些操作(如“插入”)时,才会创建数据库文件。
Although you say the data is cleared, I suspect that Android thinks it has not. 虽然你说数据被清除了,但我怀疑Android认为它没有。 To completely remove the data, I would remove the application and re-install it.
要完全删除数据,我会删除该应用程序并重新安装它。
Since your onUpgrade
calls onCreate
you could also increase the DATABASE_VERSION
value which will cause the data to be dropped and re-created. 由于
onUpgrade
调用onCreate
您还可以增加DATABASE_VERSION
值,这将导致数据被删除并重新创建。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.