raw folder and files can not be found after build

i'm trying to create a plugin for android , I wrote android codes with eclipse and created .jar file and I put .jar file and libraries in android folder in plugins and I wrote my codes in unity to start activity in android , my codes work fine in eclipse but when I build my project in unity and run it I get this error in start activity :

 10-12 18:51:31.956: W/ResourceType(3042): No package identifier when getting value for resource number 0x00000000
    10-12 18:51:31.956: W/System.err(3042): android.content.res.Resources$NotFoundException: Resource ID #0x0
 10-12 18:51:31.956: D/StatusBar.MSimNetworkController(1192): refreshViews connected={ wifi } phoneId = 0 level=4 mMSimcombinedSignalIconId=0x7f0202f8/com.android.systemui:drawable/stat_sys_wifi_signal_4 mMSimcombinedActivityIconId=0x7f0202cb mAirplaneMode=false mMSimDataActivity=0 mMSimPhoneSignalIconId=0x7f0202c1/com.android.systemui:drawable/stat_sys_signal_dark_4_auto_rotate mMSimDataDirectionIconId=0x0 mMSimDataSignalIconId=0x7f0202c1 mMSimDataTypeIconId=0x0/(null) mNoMSimIconId=0x0/(null) mMSimMobileActivityIconId=0x0/(null) mWifiIconId=0x7f0202f8 mBluetoothTetherIconId=0x7f0202d5 mRoamingIconId=0x 0/(null) mSimEnabled=true
 10-12 18:51:31.956: D/STATUSBAR-WifiQuickSettingButton(1192): onWifiSignalChanged enabled=true enabledDesc:"NG"
 10-12 18:51:31.956: W/System.err(3042):     at android.content.res.Resources.getValue(Resources.java:1542)
 10-12 18:51:31.956: W/System.err(3042):     at android.content.res.Resources.openRawResource(Resources.java:1457)
 10-12 18:51:31.956: W/System.err(3042):     at android.content.res.Resources.openRawResource(Resources.java:1434)

after I saw my apk I couldn't find raw folder and res files that I entered in unity , my project files in unity showed in image : res folder after build : res folder exist in unity editor but not exist in apk file , how can I make res and raw folder be build ? sorry for my weak English