Android开发-去掉系统自带标题栏的方式

private void hideActionBar(){
    ActionBar actionBar=getSupportActionBar();
    if(actionBar!=null){
        actionBar.hide();
    }
}

private void setFullScreen(){
 this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
}