Android上的OpenCv不使用OpenCv管理器无法正常工作

时间:2015-03-17 00:04:30

标签: android opencv android-ndk java-native-interface

我在Android上使用OpenCv,当我运行应用程序时,它让我选择安装OpenCv管理器,我不想在我的应用程序中使用此选项。为此,我跟着this answer from this forum,我按照步骤但仍然要求我提供OpenCv经理。

下面是我的android.mk

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)

OPENCV_CAMERA_MODULES:=on
OPENCV_INSTALL_MODULES:=on
OPENCV_LIB_TYPE:=STATIC
include C:\OpenCV-2.4.10-android-sdk\sdk\native\jni\OpenCV.mk

LOCAL_MODULE    := mixed_sample
LOCAL_SRC_FILES := jni_part.cpp
LOCAL_LDLIBS +=  -llog -ldl
include $(BUILD_SHARED_LIBRARY)

和属性选项

![Project Properties](/upfiles/14265260542819753.png)

我添加下面的代码但它崩溃了   @覆盖     public void onResume()     {         super.onResume();         mLoaderCallback.onManagerConnected(LoaderCallbackInterface.SUCCESS);     }

静态初始化后的代码

public class Tutorial2Activity extends Activity implements CvCameraViewListener2 {
    static {
        if (!OpenCVLoader.initDebug()) {
            // Handle initialization error
        }
    }


    private static final String    TAG = "OCVSample::Activity";

    private static final int       VIEW_MODE_RGBA     = 0;
    private static final int       VIEW_MODE_GRAY     = 1;
    private static final int       VIEW_MODE_CANNY    = 2;
    private static final int       VIEW_MODE_FEATURES = 5;

    private int                    mViewMode;
    private Mat                    mRgba;
    private Mat                    mIntermediateMat;
    private Mat                    mGray;

    private MenuItem               mItemPreviewRGBA;
    private MenuItem               mItemPreviewGray;
    private MenuItem               mItemPreviewCanny;
    private MenuItem               mItemPreviewFeatures;

    private CameraBridgeViewBase   mOpenCvCameraView;

    private BaseLoaderCallback  mLoaderCallback = new BaseLoaderCallback(this) {
        @Override
        public void onManagerConnected(int status) {
            switch (status) {
                case LoaderCallbackInterface.SUCCESS:
                {
                    Log.i(TAG, "OpenCV loaded successfully");

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

                    mOpenCvCameraView.enableView();
                } break;
                default:
                {
                    super.onManagerConnected(status);
                } break;
            }
        }
    };


    public Tutorial2Activity() {
        Log.i(TAG, "Instantiated new " + this.getClass());
    }

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        Log.i(TAG, "called onCreate");
        super.onCreate(savedInstanceState);
        getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);

        setContentView(R.layout.tutorial2_surface_view);

        mOpenCvCameraView = (CameraBridgeViewBase) findViewById(R.id.tutorial2_activity_surface_view);
        mOpenCvCameraView.setCvCameraViewListener(this);
    }

等等

修改

public Mat onCameraFrame(CvCameraViewFrame inputFrame) {
        final int viewMode = mViewMode;
        switch (viewMode) {
        case VIEW_MODE_GRAY:
            // input frame has gray scale format
            Imgproc.cvtColor(inputFrame.gray(), mRgba, Imgproc.COLOR_GRAY2RGBA, 4);
            break;
        case VIEW_MODE_RGBA:
            // input frame has RBGA format
            mRgba = inputFrame.rgba();
            break;
        case VIEW_MODE_CANNY:
            // input frame has gray scale format
            mRgba = inputFrame.rgba();
            Imgproc.Canny(inputFrame.gray(), mIntermediateMat, 80, 100);
            Imgproc.cvtColor(mIntermediateMat, mRgba, Imgproc.COLOR_GRAY2RGBA, 4);
            break;
        case VIEW_MODE_FEATURES:
            // input frame has RGBA format
            mRgba = inputFrame.rgba();
            mGray = inputFrame.gray();
            FindFeatures(mGray.getNativeObjAddr(), mRgba.getNativeObjAddr());
            break;
        }

        return mRgba;
    }

    public boolean onOptionsItemSelected(MenuItem item) {
        Log.i(TAG, "called onOptionsItemSelected; selected item: " + item);

        if (item == mItemPreviewRGBA) {
            mViewMode = VIEW_MODE_RGBA;
        } else if (item == mItemPreviewGray) {
            mViewMode = VIEW_MODE_GRAY;
        } else if (item == mItemPreviewCanny) {
            mViewMode = VIEW_MODE_CANNY;
        } else if (item == mItemPreviewFeatures) {
            mViewMode = VIEW_MODE_FEATURES;
        }

        return true;
    }

    public native void FindFeatures(long matAddrGr, long matAddrRgba);

1 个答案:

答案 0 :(得分:0)

在OpenCV中,您可以执行异步静态初始化。你想要的是静态初始化。请记住,OpenCV不推荐将其用于生产,如何查看here

根据相同的链接,我可以看到您的Android.mk是正确的。显然你忘记了第四步,那就是:

调用OpenCV API之前的Java初始化代码。例如,它可以在Activity类的静态部分中完成:

static {
    if (!OpenCVLoader.initDebug()) {
        // Handle initialization error
    }
}

如果您的应用程序包含其他依赖于OpenCV的本机库,则应在OpenCV初始化后加载它们:

static {
    if (!OpenCVLoader.initDebug()) {
        // Handle initialization error
    } else {
        System.loadLibrary("my_jni_lib1");
        System.loadLibrary("my_jni_lib2");
    }
}

编辑1

不要忘记删除进行asyn初始化的行,即:

OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_2_4_3, this, mLoaderCallback);

并添加以下行:

mLoaderCallback.onManagerConnected(LoaderCallbackInterface.SUCCESS);

ps:当您的项目带有JNI部分时,您可以编辑Android.mk文件。对于没有JNI部分的项目,您应该将相应的OpenCV本机库从OpenCV-android-sdk/sdk/native/libs/复制到项目中的libs/文件夹。 / p>

编辑2

要使用本机库进行构建,请按照this link

中的说明进行操作

尝试最后一步:

在重新构建Java部件和创建APK之前,使用手动ndk-build调用或设置Eclipse CDT Builder来构建本机JNI库。

也就是说,你必须在你的项目根目录中运行ndk-build,这样就会生成你应用程序所需的库。