“UnsatisfiedLinkError”当“dynamic_cast”用于Android NDK [英] "UnsatisfiedLinkError" appears when "dynamic_cast" is used in Android NDK
问题描述
我是Android的开发新手,我遇到下一个问题:
当我使用使用dynamic_cast表达式的C ++代码UnsatisfiedLinkError当我在模拟器上启动我的应用程序时出现。但是当我运行应用程序没有它 - 一切正常(我的意思没有任何错误LogCat)
I am new in the developing for Android and I faced with next problem: when I using C++ code that uses "dynamic_cast" expressions - "UnsatisfiedLinkError" appears when I am starting my application on an emulator. But when I run application without it - all works OK( I mean without any errors to LogCat )
我试图在Android 2.3.3上运行它。我使用android-ndk-r7b。
I tried to run it on Android 2.3.3. I used android-ndk-r7b.
我的Application.mk:
My Application.mk:
APP_OPTIM := debug
APP_ABI := armeabi
APP_STL := gnustl_static
APP_MODULES := native_lab
我的Android.mk:
My Android.mk:
LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := native_lab
LOCAL_SRC_FILES := native.cpp enum_if.cpp torrent.cpp
LOCAL_CPP_FEATURES := rtti exceptions
LOCAL_LDLIBS := -llog -lz \
/home/l/android9_toolchain/arm-linux-androideabi/lib/libstdc++.a
LOCAL_C_INCLUDES := $(LOCAL_PATH)/include
include $(BUILD_SHARED_LIBRARY)
使用动态转换的代码:
namespace libtorrent
{
template <class T>
T* alert_cast(alert* a)
{
return dynamic_cast<T*>(a);
}
}
.....
using namespace libtorrent;
if (torrent_finished_alert* p = alert_cast<torrent_finished_alert>(a)){}
cat说:
Log cat says:
03-27 07:28:26.465: D/dalvikvm(404): Trying to load lib /data/data/com.example/lib/libnative_lab.so 0x405149b8
03-27 07:28:26.496: W/dalvikvm(404): Exception Ljava/lang/UnsatisfiedLinkError; thrown while initializing Lcom/example/Bt2Activity;
03-27 07:28:26.555: W/dalvikvm(404): Class init failed in newInstance call (Lcom/example/Bt2Activity;)
03-27 07:28:26.555: D/AndroidRuntime(404): Shutting down VM
03-27 07:28:26.575: W/dalvikvm(404): threadid=1: thread exiting with uncaught exception (group=0x40015560)
03-27 07:28:26.615: E/AndroidRuntime(404): FATAL EXCEPTION: main
03-27 07:28:26.615: E/AndroidRuntime(404): java.lang.ExceptionInInitializerError
03-27 07:28:26.615: E/AndroidRuntime(404): at java.lang.Class.newInstanceImpl(Native Method)
推荐答案
尝试将这些行包含到您的Applications.mk中:
Try to include these lines into your Applications.mk:
APP_CPPFLAGS += -frtti
APP_CPPFLAGS += -fexceptions
你有Java中标记为native的任何方法吗?
Do you have any methods in Java marked as 'native'?
这篇关于“UnsatisfiedLinkError”当“dynamic_cast”用于Android NDK的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!