[Solved]-Why I can not open android manifest class in eclipse?-eclipse

your receiver is not using the full path. try changing the declaration from:

<receiver android:name=".osbootreceiver" >
    ...
</receiver>

to:

<receiver android:name="com.seafile.seadroid2.osbootreceiver" >
    ...
</receiver>

i've found that eclipse will only respond to a ctrl-click in a manifest file if the name is fully qualified.