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步驟一：定義繼承Activity類別的新類別
準備建立活動2的Activity類別，然後在onCreate()方法的最後加上一行setContentView()方法
步驟二：建立意圖來啟動新活動
在FirstActivity.java建立button1_Click()事件處理程序使用意圖來啟動新活動
步驟三：在AndroidManifest.xml註冊新活動
需要在AndroidManifest.xml檔註冊此活動，請在activity元素之後新增一個activtiy元素

1. 
   
2. 
   
3. [Android智慧型手機設計_活動生命週期以Intent6_1為例]
   
4. 
   
5. 1.First.java
   
6. package com.example.intent6_1;
   
7. 
   
8. import android.os.Bundle;
   
9. import android.app.Activity;
   
10. import android.content.Intent;
    
11. import android.content.pm.ActivityInfo;
    
12. import android.util.Log;
    
13. import android.view.Menu;
    
14. import android.view.View;
    
15. import android.view.View.OnClickListener;
    
16. import android.widget.Button;
    
17. 
    
18. public class First extends Activity {
    
19. Button btn1;
    
20. static final String Tag="1.First_App";
    
21. protected void onCreate(Bundle savedInstanceState) {
    
22. super.onCreate(savedInstanceState);
    
23. setContentView(R.layout.first);
    
24. Log.d(Tag, "1.First_App: onCreate()");
    
25. btn1=(Button)findViewById(R.id.button1);
    
26. btn1.setOnClickListener(new OnClickListener(){
    
27. 
    
28. @Override
    
29. public void onClick(View v) {
    
30. Intent myIntent=new Intent(First.this,Second.class);
    
31. startActivity(myIntent);
    
32. }});
    
33. }
    
34. protected void onStart ()
    
35. {
    
36. super.onStart();
    
37. Log.d(Tag, "1.First_App: onStart()");
    
38. }
    
39. protected void onResume ()
    
40. {
    
41. super.onResume();
    
42. Log.d(Tag,"1.First_App: onResume()");
    
43. }
    
44. @Override
    
45. protected void onPause() {
    
46. super.onPause();
    
47. Log.d(Tag,"1.First_App: onPause()");
    
48. }
    
49. @Override
    
50. protected void onStop() {
    
51. super.onStop();
    
52. Log.d(Tag,"1.First_App: onStop()");
    
53. }
    
54. protected void onRestart ()
    
55. {
    
56. super.onRestart();
    
57. Log.d(Tag,"1.First_App: onRestart()");
    
58. }
    
59. protected void onDestroy ()
    
60. {
    
61. super.onDestroy();
    
62. Log.d(Tag,"1.First_App: onDestory()");
    
63. }
    
64. }
    
65. 
    
66. 2.Second.java
    
67. package com.example.intent6_1;
    
68. 
    
69. import android.app.Activity;
    
70. import android.content.pm.ActivityInfo;
    
71. import android.os.Bundle;
    
72. import android.util.Log;
    
73. import android.view.View;
    
74. import android.view.View.OnClickListener;
    
75. import android.widget.Button;
    
76. 
    
77. public class Second extends Activity {
    
78. Button btn2;
    
79. static final String Tag="2.Second_App";
    
80. protected void onCreate(Bundle savedInstanceState) {
    
81. super.onCreate(savedInstanceState);
    
82. setContentView(R.layout.second);
    
83. Log.d(Tag, "2.Second_App: onCreate()");
    
84. btn2=(Button)findViewById(R.id.button1);
    
85. btn2.setOnClickListener(new OnClickListener(){
    
86. 
    
87. @Override
    
88. public void onClick(View v) {
    
89. finish();
    
90. }});
    
91. }
    
92. protected void onStart ()
    
93. {
    
94. super.onStart();
    
95. Log.d(Tag, "2.Second_App: onStart()");
    
96. }
    
97. protected void onResume ()
    
98. {
    
99. super.onResume();
    
100. Log.d(Tag,"2.Second_App: onResume()");
     
101. }
     
102. @Override
     
103. protected void onPause() {
     
104. super.onPause();
     
105. Log.d(Tag,"2.Second_App: onPause()");
     
106. }
     
107. @Override
     
108. protected void onStop() {
     
109. super.onStop();
     
110. Log.d(Tag,"2.Second_App: onStop()");
     
111. }
     
112. protected void onRestart ()
     
113. {
     
114. super.onRestart();
     
115. Log.d(Tag,"2.Second_App: onRestart()");
     
116. }
     
117. protected void onDestroy ()
     
118. {
     
119. super.onDestroy();
     
120. Log.d(Tag,"2.Second_App: onDestory()");
     
121. }
     
122. }

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