cocos2dx 3.0 samples can't start on android

1.When I build hellocpp sample from eclipse. It gives me the follow message:
Unable to add ‘E:\android\cocos2d-x-3.0beta2\samples\Cpp\HelloCpp\proj.android\assets\fonts\Marker Felt.ttf’: Zip add failed
After I checked, and found it is because the assets fold’s permission. I must use chmod commond to fix the problem. Should the build-android.py auto to fix this problem?
2.After first problem is soloved. I run the hellocpp ond xiaomi one android cellphone. It can’t start.
The logcat gives the follow message:
03-10 15:05:46.262: I/ActivityManager(216): Displayed org.cocos2dx.hellocpp/.Cocos2dxActivity: +202ms
03-10 15:05:46.302: D/JniHelper(16496): JniHelper::setJavaVM(0xac48), pthread_self() = 9AA18
03-10 15:05:46.302: W/dalvikvm(16496): dvmFindClassByName rejecting ‘org/cocos2dx/lib/Cocos2dxHelper’
03-10 15:05:46.302: I/DEBUG(16270): *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
03-10 15:05:46.302: I/DEBUG(16270): Build fingerprint: ‘Xiaomi/libra_mione_plus/mione_plus:2.3.5/GINGERBREAD/2.3.6f:userdebug/test-keys’
03-10 15:05:46.302: I/DEBUG(16270): pid: 16496, tid: 16513 >>> org.cocos2dx.hellocpp <<<
03-10 15:05:46.302: I/DEBUG(16270): signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 00000000
03-10 15:05:46.302: I/DEBUG(16270): r0 40520b68 r1 00000000 r2 00000005 r3 00000000
03-10 15:05:46.302: I/DEBUG(16270): r4 00000000 r5 40520b68 r6 aca975a8 r7 00000000
03-10 15:05:46.302: I/DEBUG(16270): r8 00000000 r9 00000000 10 00000000 fp 00000001
03-10 15:05:46.302: I/DEBUG(16270): ip aca97674 sp 45739c88 lr aca60ac5 pc aca608c0 cpsr 80000030

03-10 15:05:46.712: I/DEBUG(16270): debuggerd committing suicide to free the zombie!
03-10 15:05:46.712: I/DEBUG(16523): debuggerd: Sep 19 2012 17:47:47
03-10 15:05:46.712: I/BootReceiver(216): Copying /data/tombstones/tombstone_05 to DropBox (SYSTEM_TOMBSTONE)

I meet the same problem too.

Anyone konws how to fix this?