定义属于自己的标题栏

@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);
        //getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.titlebar_layout);
        
        setContentView(R.layout.activity_main);
        getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.titlebar_layout);
        
      
    }

顺序就是这样的