Launch new activity from PreferenceActivity

Given you are using xml preferences you can add code right into the xml:

<Preference
    android:title="Some Title"
    android:summary="Some Description">

    <intent 
        android:action="android.intent.action.VIEW"
        android:targetPackage="com.package.name"
        android:targetClass="com.package.name.ActivityName"
    />

</Preference>