package com.android.jingdong.dao; import android.content.Context; import android.database.sqlite.SQLiteDatabase; import android.database.sqlite.SQLiteOpenHelper; import androidx.annotation.Nullable; public class DatabaseHelper extends SQLiteOpenHelper { public DatabaseHelper(@Nullable Context context, int version) { super(context, " ", null, version); } @Override public void onCreate(SQLiteDatabase db) { // 创建数据库 String createOrders = "create table orders (" + "id integer primary key autoincrement," + "name text," + "image integer," + "money real," + "time text," + "username text)"; db.execSQL(createOrders); } @Override public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { } }