To write a library management system to achieve buy, delete add functionality

BookSys03\res\xml\books.xml
.........\...\values\styles.xml
.........\...\......\dimens.xml
.........\...\......\strings.xml
.........\...\......\colors.xml
.........\...\drawable\world_01.jpg
.........\...\........\java_01.jpg
.........\...\........\book_name_bg.9.png
.........\...\........\item_clear.png
.........\...\........\buy_01.png
.........\...\........\android_01.jpg
.........\...\........\c_01.jpg
.........\...\........\program_math.jpg
.........\...\layout\book_list_item.xml
.........\...\......\cart_item.xml
.........\...\......\cart.xml
.........\...\menu\bind_xml.xml
.........\...\drawable-hdpi\ic_launcher.png
.........\...\.........xhdpi\ic_launcher.png
.........\...\.........mdpi\ic_launcher.png
.........\.classpath
.........\.project
.........\.settings\org.eclipse.jdt.core.prefs
.........\gen\com\example\booksys03\BuildConfig.java
.........\...\...\.......\.........\R.java
.........\proguard-project.txt
.........\libs\android-support-v4.jar
.........\bin\classes.dex
.........\...\res\drawable\book_name_bg.9.png
.........\...\...\........\item_clear.png
.........\...\...\........\buy_01.png
.........\...\...\........-hdpi\ic_launcher.png
.........\...\...\.........xhdpi\ic_launcher.png
.........\...\...\.........mdpi\ic_launcher.png
.........\...\resources.ap_
.........\...\classes\com\example\booksys03\R$id.class
.........\...\.......\...\.......\.........\CartActivity.class
.........\...\.......\...\.......\.........\CartActivity$3$1.class
.........\...\.......\...\.......\.........\service\BookService.class
.........\...\.......\...\.......\.........\.......\BookService$BookBinder.class
.........\...\.......\...\.......\.........\.......\CartService.class
.........\...\.......\...\.......\.........\.......\CartService$CartBinder.class
.........\...\.......\...\.......\.........\R$layout.class
.........\...\.......\...\.......\.........\R$menu.class
.........\...\.......\...\.......\.........\R$drawable.class
.........\...\.......\...\.......\.........\CartActivity$3$2.class
.........\...\.......\...\.......\.........\BookListActivity$3$1.class
.........\...\.......\...\.......\.........\BookListActivity.class
.........\...\.......\...\.......\.........\entity\Book.class
.........\...\.......\...\.......\.........\......\Cart.class
.........\...\.......\...\.......\.........\......\Logo.class
.........\...\.......\...\.......\.........\......\CartItem.class
.........\...\.......\...\.......\.........\R$string.class
.........\...\.......\...\.......\.........\BookListActivity$3.class
.........\...\.......\...\.......\.........\R$dimen.class
.........\...\.......\...\.......\.........\BookListActivity$2.class
.........\...\.......\...\.......\.........\CartActivity$1.class
.........\...\.......\...\.......\.........\CartActivity$2.class
.........\...\.......\...\.......\.........\CartActivity$3.class
.........\...\.......\...\.......\.........\adapter\CommonAdapter.class
.........\...\.......\...\.......\.........\R$color.class
.........\...\.......\...\.......\.........\R$style.class
.........\...\.......\...\.......\.........\R$attr.class
.........\...\.......\...\.......\.........\R$xml.class
.........\...\.......\...\.......\.........\BuildConfig.class
.........\...\.......\...\.......\.........\R.class
.........\...\.......\...\.......\.........\BookListActivity$1.class
.........\...\dexedLibs\android-support-v4-414f1c7cb5aff730f18d8dda924f3ca1.jar
.........\...\BookListActivity.apk
.........\...\jarlist.cache
.........\...\AndroidManifest.xml
.........\project.properties
.........\src\com\example\booksys03\BookListActivity.java
.........\...\...\.......\.........\service\CartService.java
.........\...\...\.......\.........\.......\BookService.java
.........\...\...\.......\.........\CartActivity.java
.........\...\...\.......\.........\entity\CartItem.java
.........\...\...\.......\.........\......\Cart.java
.........\...\...\.......\.........\......\Book.java
.........\...\...\.......\.........\......\Logo.java
.........\...\...\.......\.........\adapter\CommonAdapter.java
.........\AndroidMa

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