Button - Change background color on click

Question

I have 8 buttons in my activity. What I am looking for is, The buttons have a default background and when a button is clicked, the background color should change to some other c

Answer 1

I know it is very late but I hope some one would find useful. I have very simple solution, I have used in my app and works awesome.

Let me explain the logic, 1. Keep track of 2 button clicks - previous button clicked and current button clicked. I am using ArrayList 2. for every button click keep updating the previous and current button clicks value in ArrayList. 3. change the background color of previous button clicked. 4. change the background color of current button clicked.

I hope the logic is simple and straightforward.

Here is the implementation

xml

the OnClick method is defined for every button in XML, in the example it is onClickRosterDay

Java

 //buttons 

    Button rosterMonday;
    Button rosterTuesday;
    Button rosterWednesday;
    Button rosterThursday;
    Button rosterFriday;
    Button rosterSaturday;

    //ArrayList to track button clicks
    private ArrayList buttonClickedDay;

    in OnCreate

    buttonClickedDay = new ArrayList<>();
    // to start with these are the default clicks. 
    buttonClickedDay.add(rosterMonday ); //previous button clicked
    buttonClickedDay.add(rosterMonday ); // current button clicked



    public void onClickRosterDay(View v) {
            switch (v.getId()){
                case R.id.rosterMonday:
                    daySelected = "MONDAY";
                    // move current click button to previous button clicked position
                    buttonClickedDay.set(0, buttonClickedDay.get(1)); 
                    // update current clicked position
                    buttonClickedDay.set(1,rosterMonday);
                    break;

                case R.id.rosterTuesday:
                    daySelected = "TUESDAY";
                    buttonClickedDay.set(0, buttonClickedDay.get(1));
                    buttonClickedDay.set(1,rosterTuesday);
                    break;

                case R.id.rosterWednesday:
                    daySelected = "WEDNESDAY";
                    buttonClickedDay.set(0, buttonClickedDay.get(1));
                    buttonClickedDay.set(1,rosterWednesday);
                    break;

                case R.id.rosterThursday:
                    daySelected = "THURSDAY";
                    buttonClickedDay.set(0, buttonClickedDay.get(1));
                    buttonClickedDay.set(1,rosterThursday);
                    break;

                case R.id.rosterFriday:
                    daySelected = "FRIDAY";
                    buttonClickedDay.set(0, buttonClickedDay.get(1));
                    buttonClickedDay.set(1,rosterFriday);
                    break;

                case R.id.rosterSaturday:
                    daySelected = "SATURDAY";
                    buttonClickedDay.set(0, buttonClickedDay.get(1));
                    buttonClickedDay.set(1,rosterSaturday);
                    break;
            }





        if(buttonClickedDay.get(0) != buttonClickedDay.get(1)) {
            // update background color of  previous button clicked    
buttonClickedDay.get(0).setBackgroundColor(this.getResources().getColor(R.color.colorAccent));
            // update background color of  current button clicked      
buttonClickedDay.get(1).setBackgroundColor(this.getResources().getColor(R.color.textBackgroundGreen));
        }
    }