Change with this:
if(Provider.FACEBOOK.isEmpty() && Provider.TWITTER.isEmpty() && Provider.LINKEDIN.isEmpty() && Provider.MYSPACE.isEmpty())
Toast.makeText(Route_stops.this, "You have Logged In First in any Social media", Toast.LENGTH_LONG).show();
else
Toast.makeText(Route_stops.this, "You have Logged Out", Toast.LENGTH_LONG).show();
}
OR
if(Provider.FACEBOOK.equals("") && Provider.TWITTER.equals("") && Provider.LINKEDIN.equals("") && Provider.MYSPACE.equals(""))
Toast.makeText(Route_stops.this, "You have Logged In First in any Social media", Toast.LENGTH_LONG).show();
else
Toast.makeText(Route_stops.this, "You have Logged Out", Toast.LENGTH_LONG).show();
}