ActivityNotFoundException when launching intent from preferences

test.class type is right? How to? What should I do?

<Preference 
    android:key="test" 
    android:title="test" 
    android:summary="test"> 
   <intent android:action="test.class" >  <=== **ERROR/AndroidRuntime(2384): android.content.ActivityNotFoundException: No Activity found to handle Inte开发者_运维知识库nt** 
    </intent>  
</Preference> 

I believe the question is asking how to launch an activity from a PreferenceScreen. This can be achieved using the following definition in your XML:

<Preference
  android:title="Tap me"
  android:summary="Tap to start activity">
  <intent
     android:action="android.intent.action.VIEW"
     android:targetPackage="com.example"
     android:targetClass="com.example.MyActivityClass" />
</Preference>

Finally, make sure the Activity is defined in your manifest.