我已经将OpenCV模块的依赖关系从3.4.3更新到4.1.1,现在我收到了消息
找不到OpenCV Manager软件包
尽管我已包含所有libopencv_java4.so本机库。
对于以前的版本(3.4.x),仅当我省略包含本地*.so
库时才需要软件包管理器,但是对于此版本(4.1.1)似乎没有什么区别,每次都要求使用OpenCV Manager不管。
我不希望该应用依赖于单独的OpenCV管理器。如何解决此错误?
错误日志是:
OpenCV error: Cannot load info library for OpenCV
W/System.err: java.lang.UnsatisfiedLinkError: dlopen failed: library "libc++_shared.so" not found
W/System.err: at java.lang.Runtime.loadLibrary0(Runtime.java:1071)
W/System.err: at java.lang.Runtime.loadLibrary0(Runtime.java:1007)
W/System.err: at java.lang.System.loadLibrary(System.java:1667)
W/System.err: at org.opencv.android.StaticHelper.loadLibrary(StaticHelper.java:64)
W/System.err: at org.opencv.android.StaticHelper.initOpenCVLibs(StaticHelper.java:95)
W/System.err: at org.opencv.android.StaticHelper.initOpenCV(StaticHelper.java:39)
W/System.err: at org.opencv.android.OpenCVLoader.initDebug(OpenCVLoader.java:107)
W/System.err: at com.mysite.myapp.OpenCVTestActivity.onResume(OpenCVTestActivity.java:144)
W/System.err: at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1446)
W/System.err: at android.app.Activity.performResume(Activity.java:7939)
W/System.err: at android.app.ActivityThread.performResumeActivity(ActivityThread.java:4195)
W/System.err: at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:4237)
W/System.err: at android.app.servertransaction.ResumeActivityItem.execute(ResumeActivityItem.java:52)
W/System.err: at android.app.servertransaction.TransactionExecutor.executeLifecycleState(TransactionExecutor.java:176)
W/System.err: at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:97)
W/System.err: at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2016)
W/System.err: at android.os.Handler.dispatchMessage(Handler.java:107)
W/System.err: at android.os.Looper.loop(Looper.java:214)
W/System.err: at android.app.ActivityThread.main(ActivityThread.java:7356)
W/System.err: at java.lang.reflect.Method.invoke(Native Method)
W/System.err: at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
W/System.err: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
编辑
该问题与模块配置无关,而是由OpenCV本机库崩溃导致的,由于某些原因,以前的3.4.x版本不会发生这种情况。发生此错误后,OpenCV模块的重新初始化失败,触发此错误。
gradle中的CMAKE。因此,如果我们创建dummy CMAKE和dummy-lib,则会将库libc ++ _ shared.so添加到APK。
然后,首先在/ app / src / main /目录中创建带有CMakeLists.txt
和dummy-lib.cpp文件的cpp文件夹。 ><< [CMakeLists.txt是一个虚拟文件,在里面放这个:cmake_minimum_required(VERSION 3.4.1)
add_library( # Sets the name of the library.
dummy-lib
# Sets the library as a shared library.
SHARED
# Provides a relative path to your source file(s).
dummy-lib.cpp)
find_library( # Sets the name of the path variable.
log-lib
# Specifies the name of the NDK library that
# you want CMake to locate.
log)
target_link_libraries( # Specifies the target library.
dummy-lib
# Links the target library to the log library
# included in the NDK.
${log-lib})
在dummy-lib.cpp中添加:
文件中添加:#include <jni.h> #include <string> extern "C" JNIEXPORT jstring JNICALL whatever( JNIEnv *env, jobject /* this */){ std::string hello = "Hello"; return env->NewStringUTF(hello.c_str()); };
然后,在应用程序的gradle
,一切都完成了!android { .... defaultConfig { ... externalNativeBuild { cmake { cppFlags "-std=c++11" arguments "-DANDROID_STL=c++_shared" } } } ... externalNativeBuild { cmake { path "src/main/cpp/CMakeLists.txt" version "3.10.2" } } }
所以,创建项目
如果您分析生成的APK
,则可以在其中看到库libc ++ _ shared.so!最后,sample Android Project。