1. Stack(
2. alignment: Alignment.bottomRight,
3. children: <Widget>[
4. Container(
5. width: 40.0,
6. height: 40.0,
7. margin: EdgeInsets.symmetric(horizontal: 5.0),
8. decoration: BoxDecoration(
9. shape: BoxShape.circle,
10. image: DecorationImage(
11. image: NetworkImage(
12. 'https://javareshkian.ir/wp-content/uploads/2020/04/fakhr-Small-100x100.png'),
13. fit: BoxFit.cover,
14. ),
15. ),
16. ),
17. CircleAvatar(
18. radius: 10.0,
19. backgroundColor: Colors.blueAccent,
20. child: Icon(
21. Icons.add,
22. size: 14.0,
23. color: Colors.white,
24. ),
25. )
26. ],
27. )

Stack(
  alignment: Alignment.bottomRight,
  children: <Widget>[
    Container(
      width: 40.0,
      height: 40.0,
      margin: EdgeInsets.symmetric(horizontal: 5.0),
      decoration: BoxDecoration(
        shape: BoxShape.circle,
        image: DecorationImage(
          image: NetworkImage(
              'https://javareshkian.ir/wp-content/uploads/2020/04/fakhr-Small-100x100.png'),
          fit: BoxFit.cover,
        ),
      ),
    ),
    CircleAvatar(
      radius: 10.0,
      backgroundColor: Colors.blueAccent,
      child: Icon(
        Icons.add,
        size: 14.0,
        color: Colors.white,
      ),
    )
  ],
)

1. Stack(
2. children: <Widget>[
3. Container(
4. width: 40.0,
5. height: 40.0,
6. margin: EdgeInsets.symmetric(horizontal: 5.0),
7. padding: EdgeInsets.all(2.0),
8. decoration: BoxDecoration(
9. shape: BoxShape.circle,
10. image: DecorationImage(
11. image: NetworkImage(
12. 'https://javareshkian.ir/wp-content/uploads/2020/04/fakhr-Small-100x100.png'),
13. fit: BoxFit.cover,
14. ),
15. ),
16. ),
17. Positioned(
18. right: 1.0,
19. top: 5.0,
20. child: CircleAvatar(
21. radius: 10.0,
22. backgroundColor: Colors.blueAccent,
23. child: Icon(
24. Icons.add,
25. size: 14.0,
26. color: Colors.white,
27. ),
28. ),
29. )
30. ],
31. )

Stack(
      children: <Widget>[
        Container(
          width: 40.0,
          height: 40.0,
          margin: EdgeInsets.symmetric(horizontal: 5.0),
          padding: EdgeInsets.all(2.0),
          decoration: BoxDecoration(
            shape: BoxShape.circle,
            image: DecorationImage(
              image: NetworkImage(
                  'https://javareshkian.ir/wp-content/uploads/2020/04/fakhr-Small-100x100.png'),
              fit: BoxFit.cover,
            ),
          ),
        ),
        Positioned(
          right: 1.0,
          top: 5.0,
          child: CircleAvatar(
            radius: 10.0,
            backgroundColor: Colors.blueAccent,
            child: Icon(
              Icons.add,
              size: 14.0,
              color: Colors.white,
            ),
          ),
        )
      ],
)