创建数据库和默认数据

Question

在SQlite数据库中插入默认数据

代码如下：

private static final String DATABASE_CREATE_position = "CREATE TABLE position(latitude VARCHAR(20), longitude VARCHAR(20), address VARCHAR(100))";
@Override
public void onCreate(SQLiteDatabase db) {
    // Create the table
    db.execSQL(DATABASE_CREATE_position);   

    ContentValues defaultPos = new ContentValues();
    defaultPos.put("latitude", "40.604398");
    defaultPos.put("longitude", "-3.709002");
    defaultPos.put("address", "Avenida del parque ");   

    db.insert("position", null, defaultPos);

    db.close();

}

结果运行之后数据库是空的，请帮忙看一下问题出在哪里了？谢谢

Answer 1

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_position);

        db.execSQL("insert into position (latitude,longitude,address) values (40.604398,-3.709002,'Avenida del parque ')");
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {

    ....