Android 全屏显示

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//去掉Activity的标题栏
// 这句一定要在setContentView的前面
requestWindowFeature(Window.FEATURE_NO_TITLE);

setContentView(R.layout.activity_main);

//去掉状态栏
Window window = getWindow();
window.addFlags( WindowManager.LayoutParams.FLAG_FULLSCREEN);
//隐藏虚拟按键
//只是暂时隐藏，当用户产生交互行为(点击屏幕)时，虚拟按键还是会显示出来
window.getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);

}