Android SQLiteDatabase使用带有IN或OR的where子句更新多行

Question

I have the following code which I was using to update a single row in my database:

public int updateSentFieldForIncomingMessage(IncomingMessage incomingMessage)
{
    SQLiteDatabase db;
    int numberOfRowsAffected;

    try
    {
        db = super.getWritableDatabase();
    }
    catch (SQLiteException e)
    {
        File dbFile = context.getDatabasePath(DATABASE_NAME);
        db = SQLiteDatabase.openDatabase(dbFile.getAbsolutePath(), null, SQLiteDatabase.NO_LOCALIZED_COLLATORS);
    }

    try
    {
        ContentValues values = new ContentValues();
        values.put(KEY_MESSAGE_SENT, true);

        numberOfRowsAffected = db.update(TABLE_INCOMING_MESSAGES, values, KEY_ID + " = ?", new String[]{String.valueOf(incomingMessage.getId())});
    }
    finally
    {
        db.close();
    }

    return numberOfRowsAffected;
}

This works fine but now I'd like to refactor the method so that instead of a single IncomingMessage parameter, it accepts a list of IncomingMessage. But when I get to this statement:

db.update(TABLE_INCOMING_MESSAGES, values, KEY_ID + " = ?", new String[]{String.valueOf(incomingMessage.getId())});

I'm not sure how to modify it so that I can specify multiple rows (via KEY_ID) in my WHERE clause. What I'd like to do is say something like KEY_ID IN ( <multiple row IDs here> ) . Is that possible?

Answer 1

Is that possible?

it is, but you will need a number of ? equals to the length of String[] . You can use a String builder to create such whereClause .

Eg

db.update(TABLE_INCOMING_MESSAGES, values, KEY_ID + " IN ( ?, ?, ?, ?)", new String[]{String.valueOf(incomingMessage.getId()),  "id1", "id2", "id3"});

Answer 2

In case you have unknown number of arguments, you can also use:

String args = TextUtils.join(", ", arrayOfIds);

db.execSQL(String.format("UPDATE %s SET %s = true WHERE %s IN (%s);", 
    TABLE_INCOMING_MESSAGES, KEY_MESSAGE_SENT, KEY_ID, args));