android Exit from full screen mode

To disable full screen:

getWindow().addFlags(WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN);
getWindow().clearFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
ActivitiesCurrentContentView.requestLayout();

To re-enable full screen:

getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
getWindow().clearFlags(WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN);
ActivitiesCurrentContentView.requestLayout();

I think the key in your case is re-requesting the layout.

As per below code, i can hide the TitleBar by your needs,

Button full;
static int vari = 0;

@Override
public void onCreate(Bundle savedInstanceState) 
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    full = (Button)findViewById(R.id.fullview);
    full.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            if(vari == 0)
            {
                getWindow().clearFlags(WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN);
                getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
                vari = 1;
            }else 
            {
                getWindow().clearFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
                getWindow().addFlags(WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN);                 
                vari = 0;
            }

        }
    });
}

Try this code. It helps you lot.