How to set the background for every second button in Table Layout?

Question

I made a grid of buttons dynamically in the program, I used to do this TableLayout , this is my code:

    private void createLayoutDynamically() {
        won = (TableLayout)findViewById(R.id.won);

        for ( int qq = 1; qq < a; qq++) {
            TableRow tableRow = new TableRow(this);
            tableRow.setLayoutParams(new TableLayout.LayoutParams(

                    TableLayout.LayoutParams.MATCH_PARENT,
                    TableLayout.LayoutParams.MATCH_PARENT,
                    2
                    ));

            won.setPadding(25,25,25,25);
            won.addView(tableRow);

        for ( int q = 1; q < b; q++) {

            myButton = new Button(this);

            tableRow.setLayoutParams(new TableRow.LayoutParams(
                    TableRow.LayoutParams.MATCH_PARENT,
                    TableRow.LayoutParams.MATCH_PARENT,
                    2
                    ));
}
}
}

The result of this code is something like this :

https://i.sstatic.net/Uli6s.jpg

I want to achieve that the background of these buttons change every second like here:

https://i.sstatic.net/sVKXe.jpg Can u help me ?

Answer 1

When filling table rows add to your loop:

for ( int q = 1; q < b; q++) {
    myButton = new Button(this);
    int drawable = R.drawable.first_button;
    if (q%2 == 0) {
        drawable = R.drawable.second_button;
    } 
    myButton.setBackground(getResources().getDrawable(drawable)); //you can put Resources to variable and put it outside the loop
    tableRow.setLayoutParams(new TableRow.LayoutParams(
        TableRow.LayoutParams.MATCH_PARENT,
        TableRow.LayoutParams.MATCH_PARENT,
        2));
}