如何在第一个Activity中收到的sqlite查询中传递整数变量？

Question

I am new to programming for Android devices. I have two activities, in the first activity I send an integer value from the first activity to the second activity.

How can I add this variable in sqlite query which I receive from my first activity?

I want to add booknumber where in query written b=1 I want replace 1 with booknumber

private void setData() {

    Intent mIntent = getIntent();
    int booknumber= mIntent.getIntExtra("booknumber", 0);

    stringArrayList = new ArrayList<>();

    mDBHelper = new DatabaseHelper(this);
    mDb = mDBHelper.getReadableDatabase();

    Cursor cursor = mDb.rawQuery("select DISTINCT c from t_asv where b=1", new String[]{});

    if(cursor!=null && cursor.getCount() > 0)
    {
        if (cursor.moveToFirst())
        {
            do {
                stringArrayList.add(cursor.getString(0));
            } while (cursor.moveToNext());
        }
    }

Answer 1

Just Concatenate the int booknumber to your query like below:

int booknumber= mIntent.getIntExtra("booknumber", 0);
...
Cursor cursor = mDb.rawQuery("select DISTINCT c from t_asv where b=" + booknumber, new String[]{});

Update: Its better to use the PreparedStatement / how to use as mentioned by @patrick-hollweck

Writing code like this leaves your app wide open to a sql injection vulnerability and is generally considered a very bad practice