包括库在Android项目中使用的共享对象

Question

我的Android项目正在使用具有本机代码的Android库项目，而我从库使用的本机函数中获取UnsatisifiedLinkError。

我已经在项目的Android.mk文件中包含了这些库使用的共享对象，并且在构建时它们被正确地复制到Eclipse项目的/libs目录并且存在于apks中{我运行时的{1}}目录。未找到的方法应该在libVuforiaTracking.so。

中

这是我的Android.mk文件：

/lib

这是日志消息：

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)
LOCAL_MODULE := QCAR-prebuilt
LOCAL_SRC_FILES = ../../VuforiaTracking/libs/$(TARGET_ARCH_ABI)/libQCAR.so
include $(PREBUILT_SHARED_LIBRARY)

include $(CLEAR_VARS)
LOCAL_MODULE := VuforiaTracking-prebuilt
LOCAL_SRC_FILES = ../../VuforiaTracking/libs/$(TARGET_ARCH_ABI)/libVuforiaTracking.so
include $(PREBUILT_SHARED_LIBRARY)

include $(CLEAR_VARS)

LOCAL_MODULE := MyProject

# The list of shared libraries *modules* this module depends on at runtime.
# This is necessary at link time and to embed the corresponding information
# in the generated file. We reference the prebuilt library defined earlier 
# in this makefile.
LOCAL_SHARED_LIBRARIES := QCAR-prebuilt VuforiaTracking-prebuilt

#LOCAL_SRC_FILES := MyProject.cpp

# By default, ARM target binaries will be generated in 'thumb' mode, where
# each instruction are 16-bit wide. You can define this variable to 'arm'
# if you want to force the generation of the module's object files in
# 'arm' (32-bit instructions) mode
LOCAL_ARM_MODE := arm

include $(BUILD_SHARED_LIBRARY)

这是包含库依赖项的共享对象的正确方法吗？

编辑：

我注意到包名称是12-21 09:53:48.220: E/AndroidRuntime(13086): FATAL EXCEPTION: main 12-21 09:53:48.220: E/AndroidRuntime(13086): java.lang.UnsatisfiedLinkError: Native method not found: com.qualcomm.QCARSamples.ImageTargets.VuforiaTrackingActivity.getOpenGlEsVersionNative:()I 12-21 09:53:48.220: E/AndroidRuntime(13086): at com.qualcomm.QCARSamples.ImageTargets.VuforiaTrackingActivity.getOpenGlEsVersionNative(Native Method) 12-21 09:53:48.220: E/AndroidRuntime(13086): at com.qualcomm.QCARSamples.ImageTargets.VuforiaTrackingActivity.getInitializationFlags(VuforiaTrackingActivity.java:293) 12-21 09:53:48.220: E/AndroidRuntime(13086): at com.qualcomm.QCARSamples.ImageTargets.VuforiaTrackingActivity.onCreate(VuforiaTrackingActivity.java:282) 12-21 09:53:48.220: E/AndroidRuntime(13086): at android.app.Activity.performCreate(Activity.java:5191) 12-21 09:53:48.220: E/AndroidRuntime(13086): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1094) 12-21 09:53:48.220: E/AndroidRuntime(13086): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2064) 12-21 09:53:48.220: E/AndroidRuntime(13086): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2125) 12-21 09:53:48.220: E/AndroidRuntime(13086): at android.app.ActivityThread.access$600(ActivityThread.java:140) 12-21 09:53:48.220: E/AndroidRuntime(13086): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1227) 12-21 09:53:48.220: E/AndroidRuntime(13086): at android.os.Handler.dispatchMessage(Handler.java:99) 12-21 09:53:48.220: E/AndroidRuntime(13086): at android.os.Looper.loop(Looper.java:137) 12-21 09:53:48.220: E/AndroidRuntime(13086): at android.app.ActivityThread.main(ActivityThread.java:4898) 12-21 09:53:48.220: E/AndroidRuntime(13086): at java.lang.reflect.Method.invokeNative(Native Method) 12-21 09:53:48.220: E/AndroidRuntime(13086): at java.lang.reflect.Method.invoke(Method.java:511) 12-21 09:53:48.220: E/AndroidRuntime(13086): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1006) 12-21 09:53:48.220: E/AndroidRuntime(13086): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:773) 12-21 09:53:48.220: E/AndroidRuntime(13086): at dalvik.system.NativeStart.main(Native Method) ，我应该注意到我在项目中继承了这个库的活动，所以实际活动的包名称会有所不同。当JNI寻找名为com.qualcomm.QCARSamples.ImageTargets.VuforiaTrackingActivity的方法并且我的子类名为com.qualcomm.QCARSamples.ImageTargets.VuforiaTrackingActivity.getOpenGlEsVersionNative()时会导致任何问题吗？

Answer 1

问题是，当调用本机方法VuforiaTrackingActivity时，我将使用本机方法的类的名称更改为VuforiaTracking。所以共享对象实际上是正确加载的，并且我扩展了本机方法名称所基于的基类并不重要。我将方法com.qualcomm.QCARSamples.ImageTargets.VuforiaTracking.openGlEsVersionNative更改为com.qualcomm.QCARSamples.ImageTargets.VuforiaTrackingActivity.openGlEsVersionNative，一切都正常。