我正在使用 Android 的动态交付功能,因为 openCV 使应用程序大小太大。问题是当我尝试使用SplitInstallHelper.loadLibrary(this, "opencv_java4")
. 我给了我这个错误。
致命异常:主要 E AndroidRuntime:进程:com.example.com,PID:7470 E AndroidRuntime:java.lang.UnsatisfiedLinkError:dlopen 失败:找不到库“libc++_shared.so” E AndroidRuntime:在 java.lang.Runtime .loadLibrary0(Runtime.java:1016) E AndroidRuntime: at java.lang.System.loadLibrary(System.java:1669) E AndroidRuntime: at com.google.android.play.core.splitinstall.SplitInstallHelper.loadLibrary(Unknown Source: 0) E AndroidRuntime: 在 org.opencv.com.example.com.TempActivity.onResume(TempActivity.kt:615) E AndroidRuntime: 在 android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1434) E AndroidRuntime: 在 android. app.Activity.performResume(Activity.java:7304) E AndroidRuntime:在 android.app.ActivityThread。performResumeActivity(ActivityThread.java:3993) E AndroidRuntime: 在 android.app.ActivityThread.handleResumeActivity(ActivityThread.java:4033) E AndroidRuntime: 在 android.app.servertransaction.ResumeActivityItem.execute(ResumeActivityItem.java:51) E AndroidRuntime: 在android.app.servertransaction.TransactionExecutor.executeLifecycleState(TransactionExecutor.java:145) E AndroidRuntime: 在 android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:70) E AndroidRuntime: 在 android.app.ActivityThread$H.handleMessage( ActivityThread.java:1977) E AndroidRuntime: 在 android.os.Handler.dispatchMessage(Handler.java:106) E AndroidRuntime: 在 android.os.Looper.loop(Looper.java:193) E AndroidRuntime: 在 android.app。 ActivityThread.main(ActivityThread.java:6923) E AndroidRuntime: 在 java.lang.reflect.Method.invoke(Native Method) E AndroidRuntime: 在 com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493) E AndroidRuntime: 在 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()
}
然后在onResume中加载openCV库
override fun onResume() {
super.onResume()
if (!OpenCVLoader.initDebug()) {
OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION, this, mLoaderCallback)
} else {
mLoaderCallback.onManagerConnected(LoaderCallbackInterface.SUCCESS)
}
}
这是我在 gradle 中用于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'
}
}
一些资源要求对 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})
假人.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());
};