File list (Check if you may need any files):
Calculator\.classpath
..........\.project
..........\.settings\org.eclipse.jdt.core.prefs
..........\AndroidManifest.xml
..........\bin\AndroidManifest.xml
..........\...\Calculator.apk
..........\...\classes\com\example\calculator\BuildConfig.class
..........\...\.......\...\.......\..........\MainActivity$1.class
..........\...\.......\...\.......\..........\MainActivity$10.class
..........\...\.......\...\.......\..........\MainActivity$11.class
..........\...\.......\...\.......\..........\MainActivity$12.class
..........\...\.......\...\.......\..........\MainActivity$13.class
..........\...\.......\...\.......\..........\MainActivity$14.class
..........\...\.......\...\.......\..........\MainActivity$15.class
..........\...\.......\...\.......\..........\MainActivity$16.class
..........\...\.......\...\.......\..........\MainActivity$17.class
..........\...\.......\...\.......\..........\MainActivity$18.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$dimen.class
..........\...\.......\...\.......\..........\R$drawable.class
..........\...\.......\...\.......\..........\R$id.class
..........\...\.......\...\.......\..........\R$layout.class
..........\...\.......\...\.......\..........\R$menu.class
..........\...\.......\...\.......\..........\R$string.class
..........\...\.......\...\.......\..........\R$style.class
..........\...\.......\...\.......\..........\R.class
..........\...\classes.dex
..........\...\dexedLibs\android-support-v4-290eb16fd8ca4ca5c1933def49082c73.jar
..........\...\jarlist.cache
..........\...\res\crunch\drawable-hdpi\ic_launcher.png
..........\...\...\......\.........mdpi\ic_launcher.png
..........\...\...\......\.........xhdpi\ic_launcher.png
..........\...\...\......\..........xhdpi\ic_launcher.png
..........\...\resources.ap_
..........\gen\com\example\calculator\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\ic_launcher.png
..........\...\.........xhdpi\ic_launcher.png
..........\...\..........xhdpi\ic_launcher.png
..........\...\layout\activity_main.xml
..........\...\menu\main.xml
..........\...\values\dimens.xml
..........\...\......\strings.xml
..........\...\......\styles.xml
..........\...\......-sw600dp\dimens.xml
..........\...\.........720dp-land\dimens.xml
..........\...\.......v11\styles.xml
..........\...\.........4\styles.xml
..........\src\com\example\calculator\MainActivity.java
..........\bin\classes\com\example\calculator
..........\...\.......\...\example
..........\...\res\crunch\drawable-hdpi
..........\...\...\......\drawable-mdpi
..........\...\...\......\drawable-xhdpi
..........\...\...\......\drawable-xxhdpi
..........\gen\com\example\calculator
..........\src\com\example\calculator
..........\bin\classes\com
..........\...\res\crunch
..........\gen\com\example
..........\src\com\example
..........\bin\classes
..........\...\dexedLibs
..........\...\res
..........\gen\com
..........\res\drawable-hdpi
..........\...\drawable-ldpi
..........\...\drawable-mdpi
..........\...\drawable-xhdpi
..........\...\drawable-xxhdpi
..........\...\layout
..........\...\menu
..........\...\values
..........\...\values-sw600dp
..........\...\values-sw720dp-land
..........\...\values-v11
..........\...\val