activity嵌套

 

1. package com.zhf.ActivityInLayoutDemo;  
2.   
3. import java.util.HashMap;  
4. import java.util.Map;  
5. import Android.app.ActivityGroup;  
6. import android.content.Intent;  
7. import android.os.Bundle;  
8. import android.view.View;  
9. import android.view.ViewGroup;  
10. import android.view.Window;  
11. import android.view.View.OnClickListener;  
12. import android.widget.Button;  
13. import android.widget.LinearLayout;  
14. /** 
15.  * 布局中嵌入Activity例子 
16.  * @author administrator 
17.  * 
18.  */  
19. public class ActivityInLayoutDemoActivity extends ActivityGroup {  
20.     private LinearLayout container;  
21.     private Button click1;  
22.     private Button click2;  
23.     /** 
24.      * 子View管理 
25.      */  
26.     private Map<String, View> childViews = new HashMap<String, View>();  
27.     private String currentTag;  
28.   
29.     @Override  
30.     public void onCreate(Bundle savedInstanceState) {  
31.         super.onCreate(savedInstanceState);  
32.         setContentView(R.layout.main);  
33.         container = (LinearLayout) findViewById(R.id.container);  
34.         click1 = (Button) findViewById(R.id.click1);  
35.         click2 = (Button) findViewById(R.id.click2);  
36.         click1.setOnClickListener(new OnClickListener() {  
37.   
38.             @Override  
39.             public void onClick(View arg0) {  
40.                 startActivity("activity1", new Intent(ActivityInLayoutDemoActivity.this, Activity1.class));  
41.             }  
42.         });  
43.   
44.         click2.setOnClickListener(new OnClickListener() {  
45.   
46.             @Override  
47.             public void onClick(View arg0) {  
48.                 startActivity("activity2", new Intent(ActivityInLayoutDemoActivity.this, Activity2.class));  
49.             }  
50.         });  
51.     }  
52.   
53.     /** 
54.      * 加载子Activity 
55.      *  
56.      * @param tag 
57.      * @param intent 
58.      */  
59.     private void startActivity(String tag, Intent intent) {  
60.         if (currentTag != null) {  
61.             View currentView = childViews.get(currentTag);  
62.             if (currentView != null)  
63.                 currentView.setVisibility(View.GONE);  
64.         }  
65.         currentTag = tag;  
66.         View originView = childViews.get(tag);  
67.         final Window window = getLocalActivityManager().startActivity(tag,  
68.                 intent);  
69.         final View decorView = window.getDecorView();  
70.         if (decorView != originView && originView != null) {  
71.             if (originView.getParent() != null)  
72.                 ((ViewGroup) originView.getParent()).removeView(originView);  
73.         }  
74.         childViews.put(tag, decorView);  
75.         if (decorView != null) {  
76.             decorView.setVisibility(View.VISIBLE);  
77.             decorView.setFocusableInTouchMode(true);  
78.             ((ViewGroup) decorView)  
79.                     .setDescendantFocusability(ViewGroup.FOCUS_AFTER_DESCENDANTS);  
80.             if (decorView.getParent() == null) {  
81.                 container.addView(decorView,  
82.                         new LinearLayout.LayoutParams(  
83.                                 ViewGroup.LayoutParams.FILL_PARENT,  
84.                                 ViewGroup.LayoutParams.FILL_PARENT));  
85.             }  
86.             decorView.requestFocus();  
87.         }  
88.     }  
89. }