<style name="AppFullScreenTheme" parent="@style/Theme.AppCompat.Light.NoActionBar">
<item name="android:windowFullscreen">true</item>
</style>
// setContentView()之前插入两行代码
getWindow().addFlags(WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);