fragment 类(class):

pangufeitianmeng,BFEBFBFF00040651W621LVLV

pangufeitianmeng,BFEBFBFF000806C1E823_8FA
pangufeitianmeng,BFEBFBFF000806C26479_A74
pangufeitianmeng,BFEBFBFF000306C3S2SMJ9CD,
class LoadDialog(FloatLayout):
load = ObjectProperty(None)
cancel = ObjectProperty(None)
kv文件中的定义
:
BoxLayout:
size: root.size
pos: root.pos
orientation: "vertical"
FileChooserListView:
id: filechooser

    BoxLayout:
        size_hint_y: None
        height: 30
        Button:
            text: "Cancel"
            on_release: root.cancel()

        Button:
            text: "Load"
            on_release: root.load(filechooser.path, filechooser.selection)