通过动态交付功能加载opencv_java4.so文件时出错

Question

我正在使用Android的动态投放功能，因为openCV会使应用程序尺寸过大。问题是当我尝试使用SplitInstallHelper.loadLibrary(this, "opencv_java4")加载opencv时。我给我这个错误。

致命异常：主要E AndroidRuntime：进程：com.example.com，PID：7470E AndroidRuntime：java.lang.UnsatisfiedLinkError：dlopen失败：未找到库“ libc ++ _ shared.so”E AndroidRuntime：位于java.lang.Runtime.loadLibrary0（Runtime.java:1016）E AndroidRuntime：位于java.lang.System.loadLibrary（System.java:1669）E AndroidRuntime：位于com.google.android.play.core.splitinstall.SplitInstallHelper.loadLibrary（未知来源：0）E AndroidRuntime：位于org.opencv.com.example.com.TempActivity.onResume（TempActivity.kt：615）E AndroidRuntime：位于android.app.Instrumentation.callActivityOnResume（Instrumentation.java:1434）E AndroidRuntime：位于android.app.Activity.performResume（Activity.java:7304）E AndroidRuntime：位于android.app.ActivityThread.performResumeActivity（ActivityThread.java:3993）E AndroidRuntime：位于android.app.ActivityThread.handleResumeActivity（ActivityThread.java:4033）E AndroidRuntime：位于android.app.servertransaction.ResumeActivityItem.execute（ResumeActivityItem.java:51）E AndroidRuntime：位于android.app.servertransaction.TransactionExecutor.executeLifecycleState（TransactionExecutor.java:145）E AndroidRuntime：位于android.app.servertransaction.TransactionExecutor.execute（TransactionExecutor.java:70）E AndroidRuntime：位于android.app.ActivityThread $ H.handleMessage（ActivityThread.java:1977）E AndroidRuntime：位于android.os.Handler.dispatchMessage（Handler.java:106）E AndroidRuntime：位于android.os.Looper.loop（Looper.java:193）E AndroidRuntime：位于android.app.ActivityThread.main（ActivityThread.java:6923）E AndroidRuntime：位于java.lang.reflect.Method.invoke（本机方法）E AndroidRuntime：位于com.android.internal.os.RuntimeInit $ MethodAndArgsCaller.run（RuntimeInit.java:493）E AndroidRuntime：位于com.android.internal.os.ZygoteInit.main（ZygoteInit.java:870）

我的[[onCreate看起来像这样

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    try {
        SplitInstallHelper.loadLibrary(this, "opencv_java4")
    } catch (exception: Exception) {
        exception.printStackTrace()
    }

然后将
openCV库装入onResume

 override fun onResume() {
    super.onResume()

    if (!OpenCVLoader.initDebug()) {
        OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION, this, mLoaderCallback)
    } else {
        mLoaderCallback.onManagerConnected(LoaderCallbackInterface.SUCCESS)
    }
}

这是我<< openCV

模块的<< defaultConfig。

defaultConfig {
    externalNativeBuild {
        cmake {
            cppFlags ""
            arguments "-DANDROID_ARM_NEON=TRUE",'-DANDROID_STL=c++_shared'
            targets "opencv_jni_shared"
        }
    }

    ndk {
        abiFilters 'x86', 'x86_64', 'armeabi-v7a', 'arm64-v8a'
    }
}

某些资源要求对CMakeList.txt和dummy.cpp文件进行更改

CmakeList.txt

cmake_minimum_required(VERSION 3.6)

# dummy target to bring libc++_shared.so into packages
add_library(opencv_jni_shared STATIC dummy.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.
    opencv_jni_shared

    # Links the target library to the log library
    # included in the NDK.
    ${log-lib})

dummy.cpp

#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());
};

Answer 1

opencv_java4。

这是我对正在加载opencv的“活动”所做的更改。

 override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    SplitCompat.installActivity(this)
//This is the line I added before loading "opencv_java4"
    SplitInstallHelper.loadLibrary(this, "c++_shared")

    SplitInstallHelper.loadLibrary(this, "opencv_java4")
}

它成功了！