Question

How to get Version from AndroidManifest.xml in a Library Project?
Because there, I then don’t have any activity in it.

Answer 1

PackageManager m = getPackageManager();
String app_ver = "";
try {
    app_ver = m.getPackageInfo(this.getPackageName(), 0).versionName;
} 
catch (NameNotFoundException e) {
    // Exception won't be thrown as the current package name is
    // safe to exist on the system.
    throw new AssertionError();
}