Change FAB background color when disabled

Question

I'm trying to figure out how I can change the background color of the floating action button when it is disabled for a duration of 2 seconds after being pressed. I would also like it to return to its original color when the 2 second duration is over.

This is the code for the 2 second delay when pressed. This code is in a fragment within the MainActivity.

 appBar.setExpanded(true, true);
 fab.setVisibility(View.VISIBLE);
 fab.setImageResource(R.drawable.ic_phone_white_18dp);

 fab.setOnClickListener(new View.OnClickListener() {
   @Override
   public void onClick(View v) {
     fab.setClickable(false);
     Timer buttonTimer = new Timer();
     buttonTimer.schedule(new TimerTask() {
       @Override
       public void run() {
         runOnUiThread(new Runnable() {
           @Override
           public void run() {
             fab.setClickable(true);
           }
         });
       }
     }, 2000);

I've tried playing around with the StateListDrawable methods in the documentation but have not come across anything that works.

This is the XML for the color themes of the FAB

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:color="@color/themeColorPressed" android:state_pressed="true"/>
    <item android:color="@color/themeColorPressed" android:state_checked="true"/>
    <item android:color="@color/themeColorPressed" android:state_selected="true"/>
    <item android:color="@color/themeColorPressed" android:state_enabled="false"/>
    <item android:color="@color/themeColor" android:state_enabled="true"/>
</selector>

Answer 1

Just call fab.setBackgroundColor(Color.GRAY); (or whatever color) when you disable it. Also you can use fab.setBackgroundColor(getResources().getColor(R.color.colorAccent0)); to use a resource color.

Answer 2

Just use as app:backgroundTint a selector as:

<selector xmlns:android="http://schemas.android.com/apk/res/android">
  <item android:color="...." android:state_enabled="true"/>
  <item android:alpha="..." android:color="...."/>
</selector>

And then just use in your code:

fab.isEnabled = true
fab.isEnabled = false