Android - How to remove app name from ActionBar
If you want to hide it use this code
getSupportActionBar().setDisplayShowTitleEnabled(false)
or if you want to change the name use this
getSupportActionBar().setTitle("type yor title here");
ActionBar actionBar = getActionBar();
actionBar.setDisplayShowTitleEnabled(false);
actionBar.setDisplayShowHomeEnabled(false);
Or you can just call actionbar.setTitle("")