R. Java does not exist

On the compilation server, a file is added to packages/apps/music/srccom/Android/music. The file content is:

Package COM. test; import android. app. activity; import android. OS. bundle; import android. webKit. webview; public class aboutginwavedesktop extends activity {@ overridepublic void oncreate (bundle savedinstancestate) {super. oncreate (savedinstancestate); setcontentview (R. layout. about_ginwave_desktop );}}

An error occurs during compilation:

Package R does not exist

Setcontentview (R. layout. about_ginwave_desktop );

After searching for a long time, I did not find the cause of the Error. Later I found that the package name is incorrect, and the music package name is package COM. android. music, and the package name of the newly added file is com. test. Hope you don't have similar problems in the future ~~