super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); //去除标题栏 setContentView(R.layout.main); getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); //这才是关键的全屏代码 注意顺序.要不然会报异常.