Android Program Development: (2) use intent-2.2 to resolve intent-filter conflicts

We already know that <intent-filter> is used to define how your activity is enabled by another activity. This is the so-called "filter ". However, if two activities have the same <intent-filter>, what will happen?

In androidmanifest. XMLCode.

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2. <? XML version ="1.0"Encoding ="UTF-8"?>
4. <Manifest xmlns: Android =Http://schemas.android.com/apk/res/android"
6. Package="Net. horsttnann. usingintent"
8. Android: versioncode ="1"
10. Android: versionname ="1.0">
14. <Uses-SDK Android: minsdkversion ="14"/>
18. <Application
20. Android: icon ="@ Drawable/ic_launcher"
22. Android: Label ="@ String/app_name">
24. <Activity
26. Android: Label ="@ String/app_name"
28. Android: Name =". Usingintentactivity">
30. <Intent-filter>
32. <Action Android: Name ="Android. Intent. Action. Main"/>
36. <Category Android: Name ="Android. Intent. Category. launcher"/>
38. </Intent-filter>
40. </Activity>
42. <Activity
44. Android: Label ="Second Activity"
46. Android: Name =". Secondactivity">
48. <Intent-filter>
50. <Action Android: Name ="Net. horsttnann. secondactivity"/>
52. <Category Android: Name ="Android. Intent. Category. Default"/>
54. </Intent-filter>
56. </Activity>
60. <Activity
62. Android: Label ="Third activity"
64. Android: Name =". Thirdactivity">
66. <Intent-filter>
68. <Action Android: Name ="Net. horsttnann. secondactivity"/>
70. <Category Android: Name ="Android. Intent. Category. Default"/>
72. </Intent-filter>
74. </Activity>
78. </Application>
82. </Manifest>

If you use startactivity () to start the activity, the android system will pop up a window for selecting the activity.

Analysis:

To clear the "default activity" information, go to settings-> Applications-> Manage applications page, select the application usingintent, slide the view to the bottom, and click the CEAR ults button.