Android監聽小實例

Android監聽小實例，參考 Android基礎教程第三版，修訂版中內容。

相關下載：

Android基礎教程(第3版 修訂版).pdf 下載地址：http://www.linuxidc.com/Linux/2011-11/48002.htm

//main.xml主頁面布局

1. <?xml version="1.0" encoding="utf-8"?>
2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
3. android:layout_width="fill_parent"
4. android:layout_height="fill_parent"
5. android:orientation="horizontal"
6. >
9. <LinearLayout
10. android:layout_width="fill_parent"
11. android:layout_height="wrap_content"
12. android:orientation="vertical"
13. android:layout_gravity="center"
14. android:paddingLeft="10px"
15. android:paddingRight="10px"
16. >
17. <TextView
18. android:layout_width="wrap_content"
19. android:layout_height="wrap_content"
20. android:textSize="20px"
21. android:layout_marginBottom="20dip"
22. android:text="@string/text_lable"
23. android:layout_gravity="center"
24. />
25. <TableLayout
26. android:layout_width="wrap_content"
27. android:layout_height="wrap_content"
28. android:layout_gravity="center"
29. >
30. <TableRow>
32. <Button
33. android:id="@+id/continue_button"
34. android:text="@string/contiune_label"
35. />
36. <Button
37. android:id="@+id/newgame_button"
38. android:text="@string/newgame_label"
39. />
40. </TableRow>
41. <TableRow>
42. <Button
43. android:id="@+id/about_button"
44. android:text="@string/about_label"
45. />
46. <Button
47. android:id="@+id/exit_button"
48. android:text="@string/exit_label"
49. />
50. </TableRow>
51. </TableLayout>
52. </LinearLayout>
53. </LinearLayout>

1. <?xml version="1.0" encoding="utf-8"?>
2. <resources>
4. <string name="app_name">書上案例</string>
6. <string name="about_text">\
7. 如果你想顯示成對話框的形式的話就在AndroidManifest.xml裡面有個
8. android:name=\".About\"那個Activity中加上一句\n
9. android:theme=\"@android:style/Theme.Dialog\"\n
10. </string>
12. <string name="about_title">About_Title</string>
13. <string name="text_lable">Welcome to Game world</string>
15. <string name="about_label">About</string>
16. <string name="contiune_label">Continue</string>
17. <string name="newgame_label">New Game</string>
18. <string name="exit_label">Exit</string>
21. </resources>

1. package sn.len.bookdemoabout;
3. import android.app.Activity;
4. import android.content.Intent;
5. import android.os.Bundle;
6. import android.view.View;
7. import android.view.View.OnClickListener;
9. public class BookDemoAboutActivity extends Activity implements OnClickListener
10. {
11. @Override
12. public void onCreate(Bundle savedInstanceState)
13. {
14. super.onCreate(savedInstanceState);
15. setContentView(R.layout.main);
16. //通過findviewById()方法找個各個按鈕對應的ID
17. View continueButton=findViewById(R.id.continue_button);
18. View newGameButton=findViewById(R.id.newgame_button);
19. View aboutButton=findViewById(R.id.about_button);
20. View exitButton=findViewById(R.id.exit_button);
22. //為各個按鈕分別注冊監聽
23. continueButton.setOnClickListener(this);
24. newGameButton.setOnClickListener(this);
25. aboutButton.setOnClickListener(this);
26. exitButton.setOnClickListener(this);
27. }
30. @Override
31. public void onClick(View v)
32. {
33. //給指定的Button添加自己的處理內容
34. switch(v.getId())
35. {
36. case R.id.continue_button:break;
37. case R.id.newgame_button:break;
38. case R.id.about_button:Intent i=new Intent(this,About.class);startActivity(i);break;
39. //解析new Intent(this,About.class) this作當前，About.cass做目標，通過當前找到目標(通過本類Activity可以打開About這個Activity)
40. //this是指本類(BookDemoAboutActivity)對象 -->當前
41. //About.class是指About這個類的路徑com.sn.len.About -->目標
42. case R.id.exit_button:Intent exit=new Intent(this,Exit.class);startActivity(exit);break;
43. }
44. }
45. }

1. package sn.len.bookdemoabout;
3. import android.app.Activity;
4. import android.os.Bundle;
6. public class About extends Activity
7. {
9. @Override
10. protected void onCreate(Bundle savedInstanceState)
11. {
12. // TODO Auto-generated method stub
13. super.onCreate(savedInstanceState);
14. setContentView(R.layout.about);//設置 顯示指定的布局內容about.xml
15. }
17. }

//about.xml文件

1. <?xml version="1.0" encoding="utf-8" ?>
2. <ScrollView
3. xmlns:android="http://schemas.android.com/apk/res/android"
4. android:layout_width="fill_parent"
5. android:layout_height="fill_parent"
6. android:padding="10dip"
7. >
8. <TextView
9. android:id="@+id/about_content"
10. android:layout_width="fill_parent"
11. android:layout_height="fill_parent"
12. android:text="@string/about_text"
13. />
16. </ScrollView>

1. package sn.len.bookdemoabout;
3. import android.app.Activity;
4. import android.os.Bundle;
6. public class Exit extends Activity
7. {
9. @Override
10. protected void onCreate(Bundle savedInstanceState)
11. {
12. // TODO Auto-generated method stub
13. super.onCreate(savedInstanceState);
14. setContentView(R.layout.about);
15. }
17. }