android 全屏

<span style="white-space:pre">	</span>requestWindowFeature(Window.FEATURE_NO_TITLE);//去掉标题栏
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);//去掉信息栏
setContentView(R.layout.activity_main);

更换主题

<span style="white-space:pre">	</span><style name="MyAppTheme" parent="Theme.AppCompat.Light.NoActionBar">
<item name="windowNoTitle">true</item>
<!--<item name="android:fitsSystemWindows">true</item>-->
<item name="windowActionBar">false</item>
<span style="white-space:pre">	</span> </style>

或者

在oncreate（）调用

<span style="white-space:pre"> </span> requestWindowFeature(Window.FEATURE_NO_TITLE);//去掉标题栏
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);//去掉信息栏
setContentView(R.layout.activity_main);
getSupportActionBar().hide();