我如何在android中使用SQLite？

Question

我已经为这个主题找到了一些答案(比如这个),但它没有用.我只收到警告,它无法解析方法'openOrCreateDatabase(java.lang.String,int,null)'.

这是我的源代码:

public class DBHandler
{
    SQLiteDatabase database;
    DBHandler()
    {
        database = openOrCreateDatabase("DatabaseName", Context.MODE_PRIVATE, null);
    }
}

Answer 1

SQLite是一个开源SQL数据库,用于将数据存储到设备上的文本文件中.Android带有内置的SQLite数据库实现.

请检查以下链接

1. Android SQLite数据库教程

2. SQLite数据库教程

3. SQLite和Android

结构体

 public class MySQLiteHelper extends SQLiteOpenHelper {

  public static final String TABLE_COMMENTS = "comments";
  public static final String COLUMN_ID = "_id";
  public static final String COLUMN_COMMENT = "comment";

  private static final String DATABASE_NAME = "commments.db";
  private static final int DATABASE_VERSION = 1;

  // Database creation sql statement
  private static final String DATABASE_CREATE = "create table "
      + TABLE_COMMENTS + "(" + COLUMN_ID
      + " integer primary key autoincrement, " + COLUMN_COMMENT
      + " text not null);";

  public MySQLiteHelper(Context context) {
    super(context, DATABASE_NAME, null, DATABASE_VERSION);
  }

  @Override
  public void onCreate(SQLiteDatabase database) {
    database.execSQL(DATABASE_CREATE);
  }

  @Override
  public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
    Log.w(MySQLiteHelper.class.getName(),
        "Upgrading database from version " + oldVersion + " to "
            + newVersion + ", which will destroy all old data");
    db.execSQL("DROP TABLE IF EXISTS " + TABLE_COMMENTS);
    onCreate(db);
  }

}