Android SQLite 在選定的微調器上顯示特定行

Question

我從 3 個難度中獲得了創紀錄的高分：簡單、中等、困難。 所有數據進入 1 個表。 我有 1 個活動來顯示所有的高分。

在那個活動中，我創建了一個微調器，讓用戶選擇他們想要顯示的難度數據。 所有數據都將顯示在列表視圖（ScoreView）中。

這里我想做的是在微調器上選擇用戶時顯示特定數據。

有什么辦法嗎？

這是我的數據庫：

 public Data_Collect[] getScore() {
    Data_Collect[] data = null;
    String[] colums = {"Difficult", "BRedo", "BCorrect"};
    String orderBy = "Difficult ASC";
    Cursor cursor = getReadableDatabase().query(
            "score",
            colums,
            null, null, null, null,
            orderBy);
    if (cursor.getCount()>0 && cursor.moveToNext()) {

        data = new Data_Collect[cursor.getCount()];
        int counter = 0;

        do {

            data[counter] = new Data_Collect(
                    cursor.getString(0),
                    cursor.getInt(1),
                    cursor.getInt(2));
            counter++;

        }
        while (cursor.moveToNext());
    }

    cursor.close();
    return data;
}

這是我的活動：

ArrayAdapter<String> adapterDifficult = new ArrayAdapter<>(
            Score.this, android.R.layout.simple_list_item_1, Difficulty
    );
    SpinnerDifficulty.setAdapter(adapterDifficult);
    SpinnerDifficulty.setOnItemSelectedListener(this);

    new Thread(new Runnable() {
        @Override
        public void run() {
            RecordDB db = new RecordDB(Score.this);
            Data_Collect[] data = db.getScore();
            db.close();

            if (data != null) {
                adapter = new RecordAdapter(Score.this, R.layout.recordlist, R.id.text_Difficulty, data);
                runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        ScoreView.setAdapter(adapter);
                    }
                });
            }
        }
    }).start();

}


@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
}

@Override
public void onNothingSelected(AdapterView<?> parent) {

}

Answer 1

定義困難 = '簡單'

Data_Collect[] data = null;
String[] colums = {"Difficult", "BRedo", "BCorrect"};
String orderBy = "Difficult ASC";
Cursor cursor = getReadableDatabase().query(
        "score",
        colums,
        "Difficult ='Easy'", null, null, null,
        orderBy);