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I am getting an error which reads The activity 'MainActivity' is not declared in AndroidManifest.xml
What is the problem here?
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Activities and other application components, such as services, are declared in the AndroidManifest. xml file.
The Main Activity File The main activity code is a Java file MainActivity.java. This is the actual application file which ultimately gets converted to a Dalvik executable and runs your application.
Element Tags of Manifest File It consists of a package attribute package that tells the activity's package name. It is the subelement of the manifest file that includes the declaration of the namespace. It contains certain attributes.
Yes, you can change the name of MainActivity by, opening the directory of the java file in android studio, right-click on it and find refactor, then rename, put in the name you like then click on refactor. Save this answer.
I got this error when moving a lot of files, to fix just resync your gradle files.
File->Sync Project with Gradle Files
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