Ok, after lots of trial, i finally found this
here
All i had to do was hide the status bar, that way, each fragments take up fullscreen. I hid the status bar by placing the code below in the activity i had my fragments in before setContentView()
View decorView = getWindow().getDecorView();
int uiOptions = View.SYSTEM_UI_FLAG_FULLSCREEN;
decorView.setSystemUiVisibility(uiOptions);