WindowManager.LayoutParams.FLAG_FULLSCREEN);

<style name="NoTitle" parent="Theme.AppCompat.DayNight.NoActionBar"> 
 <item name="android:windowNoTitle">true</item> 
 <item name="android:windowFullscreen">true</item> 
</style> 

<activity android:name=".SplashActivity" android:theme="@style/NoTitle"> 

<item name="windowNoTitle">true</item> 

 <resources> 
  <!-- Base application theme. --> 
  <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar"> 
   <!-- Customize your theme here. --> 
   <item name="colorPrimary">@color/colorPrimary</item> 
   <item name="colorPrimaryDark">@color/colorPrimaryDark</item> 
   <item name="colorAccent">@color/colorAccent</item> 
   <item name="windowNoTitle">true</item> 
  </style> 
 </resources> 

//取消状态栏
  getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
 WindowManager.LayoutParams.FLAG_FULLSCREEN);