Where子句不适用于Android SQLite

Question

我是Android的新手。我试图从数据库（SQLite）获取一个特定的单词。但是我无法使where子句起作用。我哪里弄错了？ 我的代码是：

    private String[] sutunlar = {"ingilizce","turkce"};

public void kelimeUret() {

    SQLiteDatabase db = kelimeler.getReadableDatabase();

    Cursor kayit = db.query("kelimeler", sutunlar, "ingilizce='hello'", null, null, null, null);

    String sonuc = kayit.getString(0);

    Toast.makeText(getApplicationContext(), sonuc, Toast.LENGTH_SHORT).show();

}

我无法得到结果......

Answer 1

在致电kayit.moveToFirst()之前致电kayit.getString(0)。

Answer 2

你应该做这样的事情

  private String[] sutunlar = {"ingilizce","turkce"};
    public void kelimeUret() {
    SQLiteDatabase db = kelimeler.getReadableDatabase();
    Cursor kayit = db.query("kelimeler", sutunlar, "ingilizce='hello'", null, null, null, null);
    if (kayit.moveToFirst())
        {
        String sonuc = kayit.getString(0);
        Toast.makeText(getApplicationContext(), sonuc, Toast.LENGTH_SHORT).show();
        } 
    kayit.close();
}