以下代码在获取包名时会导致dvmAbort（）。但是上下文对象是全局Application对象，这个引用应该是有效的。
我想抓住这个例外或解决这个崩溃，谁可以帮助我？
jclass ctx_class = env->GetObjectClass(context);
>>> Backtrace <<<
#00 pc 00022184 /system/lib/libc.so (tgkill+12)
#01 pc 000131d9 /system/lib/libc.so (pthread_kill+48)
#02 pc 000133ed /system/lib/libc.so (raise+10)
#03 pc 00012123 /system/lib/libc.so (?+0)
#04 pc 00021a38 /system/lib/libc.so (abort+4)
#05 pc 00048c9f /system/lib/libdvm.so (dvmAbort+78)
#06 pc 0004d607 /system/lib/libdvm.so (dvmDecodeIndirectRef(Thread*, _jobject*)+146)
#07 pc 0005018b /system/lib/libdvm.so (?+0)
#10 pc 000204cc /system/lib/libdvm.so (dvmPlatformInvoke+112)
#11 pc 00051157 /system/lib/libdvm.so (dvmCallJNIMethod(unsigned int const*, JValue*, Method const*, Thread*)+398)
#12 pc 00052b41 /system/lib/libdvm.so (dvmResolveNativeMethod(unsigned int const*, JValue*, Method const*, Thread*)+184)
#13 pc 00029960 /system/lib/libdvm.so (?+0)
#14 pc 00030dec /system/lib/libdvm.so (dvmMterpStd(Thread*)+76)
#15 pc 0002e484 /system/lib/libdvm.so (dvmInterpret(Thread*, Method const*, JValue*)+184)
#16 pc 000635b9 /system/lib/libdvm.so (dvmCallMethodV(Thread*, Method const*, Object*, bool, JValue*, std::__va_list)+336)
#17 pc 000635dd /system/lib/libdvm.so (dvmCallMethod(Thread*, Method const*, Object*, JValue*, ...)+20)
#18 pc 000582bb /system/lib/libdvm.so (?+0)
#19 pc 0000d2c8 /system/lib/libc.so (__thread_entry+72)
#20 pc 0000d460 /system/lib/libc.so (pthread_create+240)