假设app的title 统一的都是这种左中右结构的 代码如下

1 
     
         6     
      
         10         
         15         
         19     
        20     
      
         26         
         32         
         37     
        38     
      
         42         
         47         
         51     
        52 
     

 

 

 

 

先来继续完善一下BaseActivity

1 protected void onCreate(BundlesavedInstanceState){   2          super.onCreate(savedInstanceState);   3          ActivityMgr.push(this);   4     5          findViewById();   6 }   7     8 // 初始化app中通用的控件   9 protected void findViewById(){  10           11 }  12 //  设置标题栏  13 protected void setTitle(){  14    15 }

 

然后看一下BaseActivity的具体实现类TitleDemoActivity

1 public class TitleDemoActivity extendsBaseActivity{   2            3          protectedvoid onCreate(Bundle savedInstanceState){   4                    super.onCreate(savedInstanceState);   5          }   6     7          protectedvoid findViewById(){   8                    setContentView(R.layout.title_demo);   9                    super.findViewById();  10                    super.setTitle()；// 设置标题栏  11          }  12 }

 

TitleBar封装

 

BaseActivity的设计初衷是所有的Activity的都继承该类。

首先定义一些通用的属性、以及方法

1 private ViewSwitcher mLeftSwitcher;   2 private ViewSwitcher mMiddleSwitcher;   3 private ViewSwitcher mRightSwitcher;   4 /** * 初始化View */   5 protected void findViewById() {   6 　　mLeftSwitcher = (ViewSwitcher) findViewById(R.id.app_title_left_switcher);   7 　　mMiddleSwitcher = (ViewSwitcher) findViewById(R.id.app_title_middle_switcher);   8 　　mRightSwitcher = (ViewSwitcher) findViewById(R.id.app_title_right_switcher);   9 }  10 protected void setTitle(String left, String middle, String right) {  11 　　((TextView) mLeftSwitcher.getChildAt(0)).setText(left);  12 　　((TextView) mMiddleSwitcher.getChildAt(0)).setText(middle);  13 　　((TextView) mRightSwitcher.getChildAt(0)).setText(right);  14 }

 

 

子类调用

1 public class TitleDemoActivity extends BaseActivity {   2    3     @Override   4     protected void onCreate(Bundle savedInstanceState) {   5         super.onCreate(savedInstanceState);   6    7     }   8    9     @Override  10     protected void findViewById() {  11         setContentView(R.layout.title_demo);  12         super.findViewById();  13   14         setTitle("返回主页", "这是一个Title", "下一个界面");  15     }  16   17 }