File list (Check if you may need any files):
classroom\.classpath
.........\.project
.........\.settings\org.eclipse.jdt.core.prefs
.........\AndroidManifest.xml
.........\bin\AndroidManifest.xml
.........\...\classes\com\example\classroom\BuildConfig.class
.........\...\.......\...\.......\.........\MainActivity$1.class
.........\...\.......\...\.......\.........\MainActivity$2.class
.........\...\.......\...\.......\.........\MainActivity$3.class
.........\...\.......\...\.......\.........\MainActivity$4.class
.........\...\.......\...\.......\.........\MainActivity$5.class
.........\...\.......\...\.......\.........\MainActivity$6.class
.........\...\.......\...\.......\.........\MainActivity$7.class
.........\...\.......\...\.......\.........\MainActivity$8.class
.........\...\.......\...\.......\.........\MainActivity$9.class
.........\...\.......\...\.......\.........\MainActivity.class
.........\...\.......\...\.......\.........\R$attr.class
.........\...\.......\...\.......\.........\R$color.class
.........\...\.......\...\.......\.........\R$dimen.class
.........\...\.......\...\.......\.........\R$drawable.class
.........\...\.......\...\.......\.........\R$id.class
.........\...\.......\...\.......\.........\R$layout.class
.........\...\.......\...\.......\.........\R$menu.class
.........\...\.......\...\.......\.........\R$string.class
.........\...\.......\...\.......\.........\R$style.class
.........\...\.......\...\.......\.........\R.class
.........\...\.......\...\.......\function\connectionDb.class
.........\...\.......\...\.......\........\parentContent.class
.........\...\.......\...\.......\........\regulaExpression.class
.........\...\classes.dex
.........\...\classroom.apk
.........\...\jarlist.cache
.........\...\res\drawable-hdpi\ic_action_search.png
.........\...\...\.............\ic_launcher.png
.........\...\...\.........ldpi\ic_launcher.png
.........\...\...\.........mdpi\back.png
.........\...\...\.............\back_back.png
.........\...\...\.............\f1.png
.........\...\...\.............\f2.png
.........\...\...\.............\f3.png
.........\...\...\.............\f4.png
.........\...\...\.............\f5.png
.........\...\...\.............\f6.png
.........\...\...\.............\frontpage.png
.........\...\...\.............\frontpage2.png
.........\...\...\.............\ic_action_search.png
.........\...\...\.............\ic_launcher.png
.........\...\...\.............\search.png
.........\...\...\.............\warning.png
.........\...\...\.........xhdpi\ic_action_search.png
.........\...\...\..............\ic_launcher.png
.........\...\resources.ap_
.........\gen\com\example\classroom\BuildConfig.java
.........\...\...\.......\.........\R.java
.........\ic_launcher-web.png
.........\libs\android-support-v4.jar
.........\proguard-project.txt
.........\project.properties
.........\res\drawable-hdpi\ic_action_search.png
.........\...\.............\ic_launcher.png
.........\...\.........ldpi\ic_launcher.png
.........\...\.........mdpi\androidminda.jpg
.........\...\.............\androidminda2.jpg
.........\...\.............\back.png
.........\...\.............\back1.jpg
.........\...\.............\back_back.png
.........\...\.............\f1.png
.........\...\.............\f2.png
.........\...\.............\f3.png
.........\...\.............\f4.png
.........\...\.............\f5.png
.........\...\.............\f6.png
.........\...\.............\frontpage.png
.........\...\.............\frontpage2.png
.........\...\.............\ic_action_search.png
.........\...\.............\ic_launcher.png
.........\...\.............\search.png
.........\...\.............\warning.png
.........\...\.........xhdpi\ic_action_search.png
.........\...\..............\ic_launcher.png
.........\...\layout\activity_main.xml
.........\...\......\frontpage.xml
.........\...\......\lgl.xml
.........\...\......\message.xml
.........\...\......\show_class_message.xml
.........\...\......\whld.xml
.........\...\menu\activity_main.xml
.........\...\values\colors.xml
.........\...\......\dimens.xml
.........\...\......\strings.xml
.........\...\......\styles