Question

我想在我的片段中显示PieChart。以下是我写的xml，

<ScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@color/background">

        <LinearLayout
            android:id="@+id/graphContainer"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical">

            <com.github.mikephil.charting.charts.PieChart
                android:id="@+id/piechart"
                android:layout_width="match_parent"
                android:layout_height="match_parent" />

        </LinearLayout>
   </ScrollView>

问题是，如果我提供PieChart或match_parent，则wrap_content无效。如果我给出固定的高度和宽度它工作正常。此外，如果我删除ScrollView，它就像一个魅力！那么在ScrollView？

的情况下需要做些什么

Answer 1

在滚动视图中添加以下属性

from Tkinter import *


def save(e,e1,e2):
    open("text.txt","w").close()
    text = e.get() + "\t" + e1.get() + "\t" +  e2.get() + "\t"
    with open("text.txt", "a") as f:
        f.write(text)

def loadme(l,l2,l3):
    f = open('text.txt','r')
    line = f.readline()
    la1,la2,la3 = line.split()
    l.config(text=la1)
    l2.config(text=la2)
    l3.config(text=la3)
    f.close()

def main():
    root = Tk()
    c = Canvas(root,width=600)
    c.pack(side = 'left',expand=1,fill=BOTH)

    c2 = Canvas(c,width=600)
    c2.pack(side = 'left',expand=1,fill=BOTH)
    c3 = Canvas(c,width=600)
    c3.pack(side = 'left',expand=1,fill=BOTH)

    w1 = Label(c2, text="Controller value")
    w1.pack()
    e = Entry(c2)
    e.pack()
    w2 = Label(c2, text="Velocity")
    w2.pack()
    e1 = Entry(c2)
    e1.pack()
    w3 = Label(c2, text="Desired Heading")
    w3.pack()
    e2 = Entry(c2)
    e2.pack()
    toolbar = Frame(c2)
    b = Button(toolbar, text="save", width=9, command=lambda:save(e,e1,e2))
    b.pack(side=LEFT, padx=2, pady=2)
    toolbar.pack(side=TOP, fill=X)

    l = Label(c3,text='',bg='red')
    l.pack(side='left',expand=1,fill='x')
    l2 = Label(c3,text='',bg='yellow')
    l2.pack(side='left',expand=1,fill='x')
    l3 = Label(c3,text='',bg='blue')
    l3.pack(side='left',expand=1,fill='x')

    b2 = Button(c3,text='load',command=lambda:loadme(l,l2,l3))
    b2.pack(fill='x')
    root.mainloop()

if __name__ == '__main__':
    main()

Refer here

在ScrollView中使用时不显示MPAndroidChart PieChart

1 个答案: