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Hi all,

I have the following question:

I have several ideas for different apps using one and the key feature. Therefore I want to implement that feature as a library project. I created one, referenced the OpenCV Library project and also created a project for Android JUnit test.

In the library project I have a class that extends activity in which call the constructor and initialize opencv in async mode like this:

public class Abc extends Activity implements IAbc  {

final String TAG = "Hello World";

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

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

public Abc(){
    super();

    Log.i(TAG, "Trying to load OpenCV library");
    if (!OpenCVLoader.initDebug()) {
        Log.d(TAG, "Internal OpenCV library not found. Using OpenCV Manager for initialization");
        OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_3_0_0, this, mOpenCVCallBack);
    } else {
        Log.d(TAG, "OpenCV library found inside package. Using it!");
        mOpenCVCallBack.onManagerConnected(LoaderCallbackInterface.SUCCESS);
    }
}

So I basically made things like in the examples ( at least I think I did). I now create an instance of Abc class in my Android test. The test starts and fails with a NullPointerException that is being triggered by

 OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_3_0_0, this, mOpenCVCallBack);

I can follow it back to ContentWrapper.bindService (but can't look at the source code of this method). Whole exception looks like this:

java.lang.NullPointerException
at android.content.ContextWrapper.bindService(ContextWrapper.java:517)
at org.opencv.android.AsyncServiceHelper.initOpenCV(AsyncServiceHelper.java:26)
at org.opencv.android.OpenCVLoader.initAsync(OpenCVLoader.java:95)
at de.spospiech.gazetracker.Abc.estimateGazeDirection(Starburst.java:54)
at de.spospiech.gazetracker.AbcTest.testStarburst(StarburstTest.java:33)
at java.lang.reflect.Method.invokeNative(Native Method)
at android.test.InstrumentationTestCase.runMethod(InstrumentationTestCase.java:214)
at android.test.InstrumentationTestCase.runTest(InstrumentationTestCase.java:199)
at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:191)
at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:176)
at android.test.InstrumentationTestRunner.onStart(InstrumentationTestRunner.java:554)
at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1701)

Of course I do have OpenCV Manager 3.0.0 installed on my device. Examples do work fine.

Any idea what I do wrong?

Thanks and greetings, Sebastian