<shape
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="oval">

    <solid android:color="#44afcc" />

</shape>

private Drawable backgroundDrawable;
backgroundDrawable = getResources().getDrawable(R.drawable.today_circle_background);
int color = Color.parseColor("#FE2E2E");
backgroundDrawable.setColorFilter(new PorterDuffColorFilter(color, PorterDuff.Mode.MULTIPLY));