Question

感谢您的时间来帮助我。

我有简单的录制脚本。（在单独的项目中可以完美地执行相同的代码），但是现在我试图将相同的代码应用于不同的脚本，并且我得到 IMAGEBUTTON STOP stop.setEnabled（false）的错误;

“试图在空对象引用上调用虚拟方法'void android.widget.ImageButton.setEnabled（boolean）'”

我的图像按钮已声明，等等。我在这里错过了什么？

错误：

from requests_html import HTMLSession
from bs4 import BeautifulSoup
headers = {'user-agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36'}
session = HTMLSession()
res1 = session.get('http://www.instacart.com', headers=headers)
soup = BeautifulSoup(res1.content, 'html.parser')
token = soup.find('meta', {'name': 'csrf-token'}).get('content')
data = {"user": {"email": "alexanderjbusch@gmail.com", "password": "password"},
        "authenticity_token": token}
response = session.post('https://www.instacart.com/accounts/login', headers=headers, data=data)
print(response)
r = session.get("https://www.instacart.com/store/wegmans/search_v3/horizon%201%25", headers=headers)
r.html.render()
print(r.html.xpath("//div[@class='item-name item-row']"))

代码：

E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.bodekjan.voice, PID: 8118
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.bodekjan.voice/com.bodekjan.voice.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ImageButton.setEnabled(boolean)' on a null object reference
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2957)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3032)
    at android.app.ActivityThread.-wrap11(Unknown Source:0)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1696)
    at android.os.Handler.dispatchMessage(Handler.java:105)
    at android.os.Looper.loop(Looper.java:164)
    at android.app.ActivityThread.main(ActivityThread.java:6944)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)
 Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ImageButton.setEnabled(boolean)' on a null object reference
    at com.bodekjan.voice.MainActivity.onCreate(MainActivity.java:140)
    at android.app.Activity.performCreate(Activity.java:7183)
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1220)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2910)

咨询对象：空对象引用上的void android.widget.ImageButton.setEnabled（boolean）'

0 个答案: