Android ExpandableListView are implemented in two stages with a CheckBox achieve levels linkage choice

ExpandableListTest\.classpath
..................\.project
..................\AndroidManifest.xml
..................\bin\AndroidManifest.xml
..................\...\classes\com\example\test\BuildConfig.class
..................\...\.......\...\.......\....\ChildrenItem.class
..................\...\.......\...\.......\....\GroupItem.class
..................\...\.......\...\.......\....\ListViewAdapter$1.class
..................\...\.......\...\.......\....\ListViewAdapter$ChildViewHolder.class
..................\...\.......\...\.......\....\ListViewAdapter$GroupCBLayoutOnClickListener.class
..................\...\.......\...\.......\....\ListViewAdapter$GroupViewHolder.class
..................\...\.......\...\.......\....\ListViewAdapter.class
..................\...\.......\...\.......\....\MainActivity$1.class
..................\...\.......\...\.......\....\MainActivity.class
..................\...\.......\...\.......\....\R$attr.class
..................\...\.......\...\.......\....\R$dimen.class
..................\...\.......\...\.......\....\R$drawable.class
..................\...\.......\...\.......\....\R$id.class
..................\...\.......\...\.......\....\R$layout.class
..................\...\.......\...\.......\....\R$string.class
..................\...\.......\...\.......\....\R$style.class
..................\...\.......\...\.......\....\R.class
..................\...\classes.dex
..................\...\dexedLibs\android-support-v4-c8572e8925e16b1e76f664cee9ce9397.jar
..................\...\.........\annotations-ffffce2b6ed959752204beede9cfad9a.jar
..................\...\ExpandableListTest.apk
..................\...\jarlist.cache
..................\...\res\drawable-hdpi\ic_launcher.png
..................\...\...\.........mdpi\ck_checked.png
..................\...\...\.............\ck_partial_checked.png
..................\...\...\.............\ck_unchecked.png
..................\...\...\.............\ic_launcher.png
..................\...\...\.............\li_bg2.png
..................\...\...\.........xhdpi\ic_launcher.png
..................\...\...\..........xhdpi\ic_launcher.png
..................\...\resources.ap_
..................\gen\com\example\test\BuildConfig.java
..................\...\...\.......\....\R.java
..................\ic_launcher-web.png
..................\libs\android-support-v4.jar
..................\proguard-project.txt
..................\project.properties
..................\res\drawable-hdpi\ic_launcher.png
..................\...\.........mdpi\ck_checked.png
..................\...\.............\ck_partial_checked.png
..................\...\.............\ck_unchecked.png
..................\...\.............\ic_launcher.png
..................\...\.............\li_bg2.png
..................\...\.........xhdpi\ic_launcher.png
..................\...\..........xhdpi\ic_launcher.png
..................\...\layout\activity_main.xml
..................\...\......\children_item.xml
..................\...\......\group_item.xml
..................\...\values\dimens.xml
..................\...\......\strings.xml
..................\...\......\styles.xml
..................\...\......-sw600dp\dimens.xml
..................\...\.........720dp-land\dimens.xml
..................\src\com\example\test\ChildrenItem.java
..................\...\...\.......\....\GroupItem.java
..................\...\...\.......\....\ListViewAdapter.java
..................\...\...\.......\....\MainActivity.java
..................\bin\classes\com\example\test
..................\...\.......\...\example
..................\gen\com\example\test
..................\src\com\example\test
..................\bin\classes\com
..................\...\res\drawable-hdpi
..................\...\...\drawable-mdpi
..................\...\...\drawable-xhdpi
..................\...\...\drawable-xxhdpi
..................\gen\com\example
..................\src\com\example
..................\bin\classes
..................\...\dexedLibs
..................\...\res
..................\gen\com
..................\res\drawable-hdpi
..................\...\drawable-l

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