我想我的图像大小相对于父Containerwidget和定义的scale: 0.8,//here在AssetImage()，但它不工作？我如何解决这个问题？

Container(
                        margin: const EdgeInsets.only(top: 30),
                        alignment: Alignment.centerLeft,
                        child: Wrap(
                          children: [
                            GestureDetector(
                              onTap: () {
                                print("test");
                              },
                              child: Container(
                                width: 50,
                                height: 50,
                                // color: Colors.green,
                                decoration: const BoxDecoration(
                                  color: Colors.blue,
                                  shape: BoxShape.circle,
                                  image: 
                                  DecorationImage(
                                    fit: BoxFit.fill,
                                    image: AssetImage('images/prop/lock.png'),
                                    scale: 0.8,//here
                                  ),
                                ),
                              ),
                            ),
                            
                          ],
                        ),
                      ),

我认为LayoutBuilder()不能正常工作。

Container(
                        margin: const EdgeInsets.only(top: 30),
                        alignment: Alignment.centerLeft,
                        child: Wrap(
                          children: [
                            GestureDetector(
                              onTap: () {
                                print("test");
                              },
                              child: Container(
                                width: 50,
                                height: 50,
                                // color: Colors.green,
                                decoration: const BoxDecoration(
                                  color: Colors.blue,
                                  shape: BoxShape.circle,
                                ),
                                child: LayoutBuilder(
                                  builder: (context, constraints) {
                                    return Image.asset(
                                      'images/prop/lock.png',
                                      fit: BoxFit.none,
                                      height: constraints.maxHeight * 0.1,
                                      width: constraints.maxWidth * 0.1,
                                    );
                                  },
                                ),
                              ),
                            ),
                          ],
                        ),
                      ),