I have a Appp class that extend from Application and call Appp in manifest.
There is two another jar, that each author said call them in manifest as Application tag.
The solution is you should extends one of your app classes from upper classes (that extended itself from application class or from some app class that extended itself from application class (these are in chain).
In question, you should make a appp class that extended from soomla, and then extend soomla from push, and then push from Application class and then set push class in manifest.
public appp extends Soomla{
}
public soomla extends Push{
}
public push extends Application{
}
In mainfest.xml :