android 투명 상태 표시줄을 실현하는 가장 간단한 방법

if (hasFocus && Build.VERSION.SDK_INT >= 19) {
  View decorView = getWindow().getDecorView();
  decorView.setSystemUiVisibility(
      View.SYSTEM_UI_FLAG_LAYOUT_STABLE
      | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
      | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
      | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
      | View.SYSTEM_UI_FLAG_FULLSCREEN
      | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
 }

public static void setTranslucentStatus(Activity activity){
    Window window = activity.getWindow();
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
      window.clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
        window.getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_STABLE);
        window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
        window.setStatusBarColor(Color.TRANSPARENT);
    }else if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT){
        window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
    }
} 

@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    Utils.setTranslucentStatus(this);
}