這就是我要做的,我創建了一個SQL數據庫來保存飲料的巨型表,該表是這樣的:將大型列表插入SQL數據庫的最佳方式是什麼? [ANDROID]
**_ID ALCOHOL TYPE BRAND PRICE**
例。 1酒伏特加斯米爾諾夫14
這裏是我的數據庫適配器代碼:
package net.learn2develop.Database;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;
public class DBAdapter {
public static final String KEY_ROWID = "_id";
public static final String KEY_ALCOHOL = "alcohol";
public static final String KEY_TYPE = "type";
public static final String KEY_BRAND = "brand";
public static final String KEY_PRICE = "price";
private static final String TAG = "DBAdapter";
private static final String DATABASE_NAME = "booze";
private static final String DATABASE_TABLE = "titles";
private static final int DATABASE_VERSION = 1;
private static final String DATABASE_CREATE =
"create table titles (_id integer primary key autoincrement, "
+ "alcohol text not null, type text not null, "
+ "brand text not null);" + "price integer not null";
private final Context context;
private DatabaseHelper DBHelper;
private SQLiteDatabase db;
public DBAdapter(Context ctx)
{
this.context = ctx;
DBHelper = new DatabaseHelper(context);
}
private static class DatabaseHelper extends SQLiteOpenHelper
{
DatabaseHelper(Context context)
{
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db)
{
db.execSQL(DATABASE_CREATE);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion,
int newVersion)
{
Log.w(TAG, "Upgrading database from version " + oldVersion
+ " to "
+ newVersion + ", which will destroy all old data");
db.execSQL("DROP TABLE IF EXISTS titles");
onCreate(db);
}
}
//---opens the database---
public DBAdapter open() throws SQLException
{
db = DBHelper.getWritableDatabase();
return this;
}
//---closes the database---
public void close()
{
DBHelper.close();
}
//---insert a title into the database---
public long insertTitle(String alcohol, String type, String brand, int price)
{
ContentValues initialValues = new ContentValues();
initialValues.put(KEY_ALCOHOL, alcohol);
initialValues.put(KEY_TYPE, type);
initialValues.put(KEY_BRAND, brand);
initialValues.put(KEY_PRICE, price);
return db.insert(DATABASE_TABLE, null, initialValues);
}
//---deletes a particular title---
public boolean deleteTitle(long rowId)
{
return db.delete(DATABASE_TABLE, KEY_ROWID +
"=" + rowId, null) > 0;
}
//---retrieves all the titles---
public Cursor getAllTitles()
{
return db.query(DATABASE_TABLE, new String[] {
KEY_ROWID,
KEY_ALCOHOL,
KEY_TYPE,
KEY_BRAND,
KEY_PRICE},
null,
null,
null,
null,
null);
}
//---retrieves a particular title---
public Cursor getTitle(long rowId) throws SQLException
{
Cursor mCursor =
db.query(true, DATABASE_TABLE, new String[] {
KEY_ROWID,
KEY_ALCOHOL,
KEY_TYPE,
KEY_BRAND,
KEY_PRICE
},
KEY_ROWID + "=" + rowId,
null,
null,
null,
null,
null);
if (mCursor != null) {
mCursor.moveToFirst();
}
return mCursor;
}
//---updates a title---
public boolean updateTitle(long rowId, String alcohol,
String type, String brand, int price)
{
ContentValues args = new ContentValues();
args.put(KEY_ALCOHOL, alcohol);
args.put(KEY_TYPE, type);
args.put(KEY_BRAND, brand);
args.put(KEY_PRICE, price);
return db.update(DATABASE_TABLE, args,
KEY_ROWID + "=" + rowId, null) > 0;
}
}
現在我知道我可以在我的主要活動逐一新增致電:
//---add 2 titles---
db.open();
long id;
id = db.insertTitle(
"Liquor",
"Vodka",
"Smirnoff",
"14");
id = db.insertTitle(
"Liquor",
"Rum",
"Captain Morgan",
"20");
db.close();
的問題是我有數百個添加....什麼是將它們全部添加到數據庫中的最佳方式? 在此先感謝您的幫助!我還在學習,我從來沒有使用過數據庫,所以現在我就丟了儀式。
有沒有教程可以指導我如何做到這一切?你完全是禮節,但我想硬編碼的所有選項,我已經有一個飲料的列表,我要求教程的唯一原因是因爲我從來沒有使用數據庫前lol – Hockeyman271
對於PC編輯,我使用SQLite數據庫瀏覽器 - 開源和SourceForge。這真的很容易開始。想象一個數據庫表,就像電子表格表中的行和列。該數據庫類似於多張表格(表格)的電子表格(好貴族,只有Lotus 1-2-3閃回)。只需使用列名稱和類型創建數據庫和飲料表以匹配CSV(列名中不包含空格,大小寫無關,並查看數據中的撇號)。嘗試從這裏開始http://www.sqlite.org/cvstrac/wiki/wiki?p=ImportingFiles – Simon
非常感謝!我應該只使用我已經創建的現有數據庫嗎?如果是的話,我該如何將它從我的應用程序項目中提取出來? – Hockeyman271