【转】Ormlite-不继承OrmLiteBaseActivity使用Ormlite

package com.example.myscrolltest;

import java.sql.SQLException;

import android.app.Activity;
import android.os.Bundle;

import com.j256.ormlite.android.apptools.OpenHelperManager;
import com.j256.ormlite.dao.Dao;

/**
 * @author fanshuo
 * @date 2012-12-22
 */
public class DataActivity extends Activity {

    private DataHelper databaseHelper = null;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        try {
            Dao<User, Integer> dao = getHelper().getUserDataDao();
            User user = new User();
            user.setUserName("Test");
            user.setUserPwd("password");
            dao.create(user);

        } catch (SQLException e) {
            e.printStackTrace();
        }
    }

    public DataHelper getHelper() {
        if (databaseHelper == null) {
            databaseHelper = OpenHelperManager
                    .getHelper(this, DataHelper.class);
        }
        return databaseHelper;
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();

        /*
         * 释放资源
         */
        if (databaseHelper != null) {
            OpenHelperManager.releaseHelper();
            databaseHelper = null;
        }
    }

}