viewpager nesting problem can not slide

ViewPager嵌套\EffectiveNavigation\.classpath
.............\...................\.project
.............\...................\.settings\org.eclipse.jdt.core.prefs
.............\...................\AndroidManifest.xml
.............\...................\bin\AndroidManifest.xml
.............\...................\...\classes\com\example\android\effectivenavigation\BuildConfig.class
.............\...................\...\.......\...\.......\.......\...................\CollectionDemoActivity$DemoCollectionPagerAdapter.class
.............\...................\...\.......\...\.......\.......\...................\CollectionDemoActivity$DemoObjectFragment$1.class
.............\...................\...\.......\...\.......\.......\...................\CollectionDemoActivity$DemoObjectFragment$2.class
.............\...................\...\.......\...\.......\.......\...................\CollectionDemoActivity$DemoObjectFragment.class
.............\...................\...\.......\...\.......\.......\...................\CollectionDemoActivity.class
.............\...................\...\.......\...\.......\.......\...................\LaunchpadSectionFragment.class
.............\...................\...\.......\...\.......\.......\...................\MainActivity$1.class
.............\...................\...\.......\...\.......\.......\...................\MainActivity.class
.............\...................\...\.......\...\.......\.......\...................\ParentViewPager.class
.............\...................\...\.......\...\.......\.......\...................\R$attr.class
.............\...................\...\.......\...\.......\.......\...................\R$drawable.class
.............\...................\...\.......\...\.......\.......\...................\R$id.class
.............\...................\...\.......\...\.......\.......\...................\R$layout.class
.............\...................\...\.......\...\.......\.......\...................\R$string.class
.............\...................\...\.......\...\.......\.......\...................\R.class
.............\...................\...\.......\...\lee\test\AppSectionsPagerAdapter.class
.............\...................\...\classes.dex
.............\...................\...\dexedLibs\android-support-v4-3d8cbffbcf9bde0badfd31fe832a1219.jar
.............\...................\...\.........\annotations-8ebf4383b0900296b31596516380e8c8.jar
.............\...................\...\jarlist.cache
.............\...................\...\MainActivity.apk
.............\...................\...\res\drawable-hdpi\ic_launcher.png
.............\...................\...\...\.........ldpi\ic_launcher.png
.............\...................\...\...\.........mdpi\ic_launcher.png
.............\...................\...\...\.........xhdpi\ic_launcher.png
.............\...................\...\resources.ap_
.............\...................\gen\com\example\android\effectivenavigation\BuildConfig.java
.............\...................\...\...\.......\.......\...................\R.java
.............\...................\libs\android-support-v4.jar
.............\...................\project.properties
.............\...................\res\drawable-hdpi\ic_launcher.png
.............\...................\...\.........ldpi\ic_launcher.png
.............\...................\...\.........mdpi\ic_launcher.png
.............\...................\...\.........xhdpi\ic_launcher.png
.............\...................\...\layout\activity_collection_demo.xml
.............\...................\...\......\activity_main.xml
.............\...................\...\......\fragment_collection_object.xml
.............\...................\...\......\fragment_section_launchpad.xml
.............\...................\...\values\strings.xml
.............\...................\src\com\example\android\effectivenavigation\CollectionDemoActivity.java
.............\...................\...\...\.......\.......\...................\LaunchpadSectionFragment.java
.............\...................\...\...\.......\.......\...................\MainActivity.java
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