Android標(biāo)題欄中添加返回按鈕功能

public class CustomTitle {  
  private static Activity mActivity;  
  public static void getCustomTitle(Activity activity, String title) { 
   mActivity = activity; 
    mActivity.requestWindowFeature(Window.FEATURE_CUSTOM_TITLE); 
   mActivity.setContentView(R.layout.custom_title); 
    mActivity.getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, 
        R.layout.custom_title);     
    TextView textView = (TextView) activity.findViewById(R.id.head_center_text);  
    textView.setText(title);  
   Button titleBackBtn = (Button) activity.findViewById(R.id.TitleBackBtn);  
    titleBackBtn.setOnClickListener(new OnClickListener() {  
      public void onClick(View v) {  
       Log.d("Title back","key down"); 
         
        mActivity.finish(); 
      }  
    });  
  } 
} 

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
  android:layout_width="match_parent" 
  android:layout_height="match_parent" >   
  <Button  
    android:id="@+id/TitleBackBtn"  
    android:layout_width="50dp"    
   android:layout_height="wrap_content"   
    android:gravity="center"  
   android:layout_alignParentRight="true"  
    android:background="@android:drawable/ic_menu_revert"/>      
  <TextView  
    android:id="@+id/head_center_text"  
    android:layout_width="wrap_content"  
    android:layout_height="wrap_content"  
    android:layout_centerInParent="true"  
   android:text=""   
    android:textSize="25sp" 
    android:textColor="#FFFFFF"  
    />  
</RelativeLayout> 

public class InformationActivity extends Activity{ 
  @Override 
  protected void onCreate(Bundle savedInstanceState) { 
    // TODO Auto-generated method stub     
super.onCreate(savedInstanceState);          
   CustomTitle.getCustomTitle(this, "個人信息"); 
    setContentView(R.layout.informationactivity); 
  ....................... 
  } 
} 

 <style name="MyCustomTheme" parent="android:Theme">     
     <item name="android:windowTitleBackgroundStyle">@style/TitleBarBackground</item>  
     <item name="android:windowTitleSize">50dp</item>  
  </style> 

     android:name="com.xxx.InformationActivity" 
      android:theme="@style/MyCustomTheme" 
      android:screenOrientation="landscape" />