Utility methods that create a ColorStateList for use with SwitchCompat. Allows for dynamic colour changes.

SwitchCompatStateListUtils.java

    private static final int SWITCH_STATE_LIST_ALPHA = (int)(0.3f*255);

    public static ColorStateList buildSwitchCompatColorStateListFromResId(
            Context context, int activatedColorResId) {
        return buildSwitchCompatColorStateList(
                context, ContextCompat.getColor(context, activatedColorResId)
        );
    }

    public static ColorStateList buildSwitchCompatColorStateList(Context context, int activatedColor) {

        final int disabledColor = ContextCompat.getColor(context, R.color.grey_300);
        final int disabledColorAlpha = Color.argb(
                SWITCH_STATE_LIST_ALPHA,
                Color.red(disabledColor),
                Color.green(disabledColor),
                Color.blue(disabledColor)
        );

        final int[][] states = new int[][] {
                new int[] { -android.R.attr.state_enabled },
                new int[] { android.R.attr.state_checked },
                new int[0]
        };

        final int[] colors = new int[] { disabledColorAlpha, activatedColor, disabledColor };

        return new ColorStateList(states, colors);

    }