请问如何隐藏android4.0底部的虚拟按键，导航栏

Answer 1

public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
main = getLayoutInflater().from(this).inflate(R.layout.main, null);
main.setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);
setContentView(main);
}