全屏

 getWindow().setFlags(android.view.WindowManager.LayoutParams. FLAG_FULLSCREEN , android.view.WindowManager.LayoutParams. FLAG_FULLSCREEN);
/*
android.view.WindowManager.LayoutParams attrs = getWindow().getAttributes();
attrs.flags |= android.view.WindowManager.LayoutParams.FLAG_FULLSCREEN;
getWindow().setAttributes(attrs);
getWindow().addFlags(android.view.WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);
*/