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a. 需使用qlite数据库进行roid应用
原标题:Want to use sqlite database for an android application

页: 1

我想建立一个用于安伯斯应用的qlite数据库,储存数据供脱线使用。 在没有互联网连接的情况下,我的申请将显示这一微薄的行文中的一些数据。 我应该从哪里开始?

谢谢。

最佳回答
public class DatabaseHelper extends SQLiteOpenHelper  {
    public DatabaseHelper(Context context) {
        super(context, "DATABASE_NAME", null, 1);
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        db.execSQL("CREATE TABLE yourTable ("
                + "id INTEGER PRIMARY KEY, "
                + "name TEXT NOT NULL);");
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int o, int arg2) {
        db.execSQL("DROP TABLE IF EXISTS yourTable");
        onCreate(db);
    }

    public void insertMethod(String name) {
        SQLiteDatabase db = getWritableDatabase();
        String insertQuery = "INSERT INTO yourTable (name) VALUES(?)";
        SQLiteStatement stmt = db.compileStatement(insertQuery);
        stmt.bindString(1, name);
        stmt.execute();
        stmt.close();
        db.close();
    }

    public String getMethod() {
        String name;
        SQLiteDatabase db = getReadableDatabase();
        String selectQuery = "SELECT name FROM yourTable LIMIT 1";
        Cursor cur = db.rawQuery(selectQuery, null);
        cur.moveToFirst();

        if(cur.isAfterLast() == false)
            name= cur.getString(0);

        cur.close();
        db.close();
        return name;
    }

}
问题回答

您可以动态地建立qlite数据库,或将现有的数据库复制到我们的工作空间。

参看这一链接:。 http://www.screaming-penguin.com/node/7742





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