Android Studio Fix problem default Activity not found

The new project, which was opened yesterday, was found to be unable to compile. The compile button cannot be clicked, you must edit the configuration. and error default activity

Not found

Search for solutions from the Web.

The first step: in the Androidmainfest.xml file,

The path to the activity that will be set to main. Written as absolute path, that is, the way to complete the Packagename.classname

And then go back to the test. If you can't

In the second step:

Add the following attribute to the intent-filter of main activity

<Action Android:name="packagename.classname"/>  

Specific reference address:

Http://www.bubuko.com/infodetail-899104.html

http://blog.csdn.net/bdmh/article/details/30489451

Android Studio Fix problem default Activity not found