Android的OpenCV：示例項目ClassNotFound異常

Question

我想從opencv運行一個示例爲Android。它不工作。

java.lang.RuntimeException: Unable to instantiate activity 
ComponentInfo{org.opencv.samples.puzzle15/org.opencv.samples. 
puzzle15.Puzzle15Activity}: java.lang.ClassNotFoundException: Didn't find class 
"org.opencv.samples.puzzle15.Puzzle15Activity" on path: 
DexPathList[[zip file "/data/app/org.opencv.samples.puzzle15- 
1.apk"],nativeLibraryDirectories= 
[/data/app-lib/org.opencv.samples.puzzle15-1, /vendor/lib, /system/lib]] 

這是什麼意思，我該如何解決？我想要具體步驟來解決它。

完整的日誌：

 10-25 14:03:09.794: E/AndroidRuntime(958): FATAL EXCEPTION: main 
    10-25 14:03:09.794: E/AndroidRuntime(958): java.lang.RuntimeException: Unable to  
    instantiate activity ComponentInfo{org.opencv.samples.puzzle15/ 
    org.opencv.samples.puzzle15.Puzzle15Activity}: java.lang.ClassNotFoundException:  
    Didn't find class "org.opencv.samples.puzzle15.Puzzle15Activity" on path: 
    /data/app/org.opencv.samples.puzzle15-2.apk 
    10-25 14:03:09.794: E/AndroidRuntime(958):  at  
    android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2106) 
    10-25 14:03:09.794: E/AndroidRuntime(958):  at 
    android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230) 
    10-25 14:03:09.794: E/AndroidRuntime(958):  at 
    android.app.ActivityThread.access$600(ActivityThread.java:141) 
    10-25 14:03:09.794: E/AndroidRuntime(958):  at 
    android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234) 
    10-25 14:03:09.794: E/AndroidRuntime(958):  at 
    android.os.Handler.dispatchMessage(Handler.java:99) 
    10-25 14:03:09.794: E/AndroidRuntime(958):  at 
    android.os.Looper.loop(Looper.java:137) 
    10-25 14:03:09.794: E/AndroidRuntime(958):  at 
    android.app.ActivityThread.main(ActivityThread.java:5041) 
    10-25 14:03:09.794: E/AndroidRuntime(958):  at 
    java.lang.reflect.Method.invokeNative(Native Method) 
    10-25 14:03:09.794: E/AndroidRuntime(958):  at 
    java.lang.reflect.Method.invoke(Method.java:511) 
    10-25 14:03:09.794: E/AndroidRuntime(958):  at  
    com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 
    10-25 14:03:09.794: E/AndroidRuntime(958):  at 
    com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 
    10-25 14:03:09.794: E/AndroidRuntime(958): dalvik.system.NativeStart.main(NativeMethod) 
    10-25 14:03:09.794: E/AndroidRuntime(958): Caused by: java.lang.ClassNotFoundException: 
    Didn't find class "org.opencv.samples.puzzle15.Puzzle15Activity" on path: 
    /data/app/org.opencv.samples.puzzle15-2.apk 
    10-25 14:03:09.794: E/AndroidRuntime(958): at 
    dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:65) 
    10-25 14:03:09.794: E/AndroidRuntime(958): at 
    java.lang.ClassLoader.loadClass(ClassLoader.java:501) 
    10-25 14:03:09.794: E/AndroidRuntime(958): at 
    java.lang.ClassLoader.loadClass(ClassLoader.java:461) 
    10-25 14:03:09.794: E/AndroidRuntime(958): at 
    android.app.Instrumentation.newActivity(Instrumentation.java:1054) 
    10-25 14:03:09.794: E/AndroidRuntime(958): at 
    android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2097) 

Answer 1

從這個OpenCV for android和導入後下載ADT Bundle

取而代之的是：

Warning : After the initial import, on a non-Windows (Linux and Mac OS) operating system Eclipse will still show build errors for applications with native C++ code. To resolve the issues, please do the following: 
Open Project Properties -> C/C++ Build, and replace 「Build command」 text to "${NDKROOT}/ndk-build" (remove .cmd at the end). 

嘗試以下步驟：

下載NDK編譯Android NDK

指定NDK位置：

的Windows >>>喜好>>安卓>> NDK >>設置NDK的位置（其中U已經從上面下載鏈接）項目

獲取地點：

右鍵單擊該項目>>>屬性>>資源>>位置

如：位置：d：\ OpenCV的-2.4.6-Android的SDK-R2 \ OpenCV的-2.4.6-Android的SDK \樣本\ 15益智

使用CMD生成項目：

d：\的OpenCV-2.4.6-Android的SDK-R2 \的OpenCV-2.4.6-Android的SDK \樣品\ 15的益智> d：\機器人-NDK-R9 \ NDK-建立

D：\ android-ndk-r9 \ ndk-build（你的NDK路徑）

注意：確保你已經包含了庫項目並安裝了OpenCV管理器