Solve the Problem of class not found in Android development in eclipse

When using eclipse for development, we often pressF3To view the source file.
1. Download the android source file and decompress it to include folders such as Android, COM, Dalvik, Java, and Res.
2. Find the android SDK installation directory,Create a folderThe name isSourcesDownload the source codeCopyGo in.
.
3.
Click F3 to display "source not found", as shown in figure

Click attach Source

Select external Folder and add the source address to the location path.
In this way, you can see the android APISource code.