java.lang.UnsatisfiedLinkError:无法从loader加载native_sample

时间:2015-12-13 08:00:48

标签: java android classloader

错误:

Process: com.example.syafiq.opencvoi, PID: 7760
java.lang.UnsatisfiedLinkError: Couldn't load native_sample from loader dalvik.system.PathClassLoader[dexPath=/data/app/com.example.syafiq.opencvoi-13.apk,libraryPath=/data/app-lib/com.example.syafiq.opencvoi-13]: findLibrary returned null
at java.lang.Runtime.loadLibrary(Runtime.java:358)
at java.lang.System.loadLibrary(System.java:526)
at com.example.syafiq.opencvoi.Sample3Native$1.onManagerConnected(Sample3Native.java:79)
at org.opencv.android.AsyncServiceHelper$3.onServiceConnected(AsyncServiceHelper.java:319)
at android.app.LoadedApk$ServiceDispatcher.doConnected(LoadedApk.java:1114)
at android.app.LoadedApk$ServiceDispatcher$RunConnection.run(LoadedApk.java:1131)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:146)
at android.app.ActivityThread.main(ActivityThread.java:5602)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
at dalvik.system.NativeStart.main(Native Method)

sample3Native.java第79行是:

 public void onManagerConnected(int status) {
        switch (status) {
            case LoaderCallbackInterface.SUCCESS:
            {
                Log.i(TAG, "OpenCV loaded successfully");

                // Load native library after(!) OpenCV initialization
                System.loadLibrary("native_sample");

AsyncServiceHelper.Java第319行是

mUserAppCallback.onManagerConnected(status);

Android.mk

LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
include ../../sdk/native/jni/OpenCV.mk
LOCAL_MODULE    := native_sample
LOCAL_SRC_FILES := jni_part.cpp
LOCAL_LDLIBS +=  -llog -ldl
include $(BUILD_SHARED_LIBRARY)

和application.mk

APP_STL := gnustl_static
APP_CPPFLAGS := -frtti -fexceptions
APP_ABI := armeabi armeabi-v7a
LOCAL_ARM_NEON := true

代码中没有错误。我尝试了几种解决方案,但结果仍然相同,代码是从开源网站获得的。我对android studio不够好,我还在学习。我希望你们能帮助我解决这个错误。我非常感谢您的帮助和考虑,以帮助我解决我的错误。我很感激你的时间:)。

2 个答案:

答案 0 :(得分:0)

从我的角度来看,“native_sample”库的版本有问题。正如它在documentation

中所写的那样
  

如果Java虚拟机无法找到合适的内容,则抛出该异常   声明为native的方法的本地语言定义。

您的类路径中可能存在两个版本,并且jvm加载了错误的版本。所以它找到了库,但是在类加载过程中发现不一致,可能在后来的lib版本中添加了所需的方法。

我建议尝试这个:

System.load(String path) //with an absolute path to needed lib

另见:Difference between System.load() and System.loadLibrary in Java

答案 1 :(得分:0)

apply plugin: 'com.android.application'

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.2"

    defaultConfig {
        applicationId "com.example.syafiq.opencvoi"
        minSdkVersion 19
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    sourceSets {

           // jniLibs.srcDirs = ['libs']
       main{
         jniLibs{
           srcDir 'libs'
         }
       }

    }


}

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:23.1.1'
    compile project(':libraries:opencv')
}