Android Studio, Activity must be exported or contain an intent-filter

Question

I accidentally clicked something somewhere I think and now my project won't build/run. When I click Run, it Just get message stating "Error running MainActivity: The activity must be exported or contain an intent-filter"

what can I do to fix this error?

When I click on that error I get a huge log stating:

  10/19 11:54:27: Launching app
 Split APKs installed
 $ adb shell am start -n       "com.example.robjohns.something/com.example.robjohns.something.Introduction" -a android.intent.action.MAIN -c android.intent.category.LAUNCHER
Client not ready yet..Waiting for process to come online
Waiting for process to come online
Connected to process 2181 on device Nexus_5X_API_24 [emulator-5554]
Application terminated.

My AndroidManifest.xml

EDIT: I updated my AndroidManifest.xml and now when I build/run app, it starts from my MainActivity file instead of how it's supposed to start from my Introduction file. HOW DO I GET IT TO START FROM INTRODUCTION FILE?

I know there are others who posted this question but those answerers said to add "android:exported="true" which I did but nothing changed.

Answer 1

似乎红线文件不在原始文件夹中，请尝试查找活动文件，祝您好运