Position indicator marker icon orientation issue

[binod-techindustan]

The icon rotate properly during navigation but when we zoom-in or zoom-out the map then position indicator icon is not rotating properly. @starand Please check it.

[Merlin1stHere]

@binod-techindustan The built-in PositionIndicator does not support rotation. Please specify what do you mean?

[binod-techindustan]

@Merlin1stHere we are setting icon using the below code.

Bitmap truckBitmap = BitmapFactory.decodeResource(getResources(),
                                R.drawable.truck);
Image image = new Image();
image.setBitmap(truckBitmap);
mMapFragment.getPositionIndicator().setMarker(image);

Basically the issue is when we zoom in or out the map we set the map update mode to NONE.

NavigationManager.getInstance().setMapUpdateMode(NavigationManager.MapUpdateMode.NONE);

So after that, the map orientation stops but the position indicator icon keeps moving toward a destination but the icon orientation doesn't change. As our icon shape is rectangular in shape it doesn't look good.

[Merlin1stHere]

@binod-techindustan The build-in PositionIndicator doesn't support rotation. You can rotate the image for the marker using the current map orientation in callback onMapTransformEnd.

[binod-techindustan]

@Merlin1stHere can we update the icon size according to the zoom level?

[Merlin1stHere]

@binod-techindustan By the same way. Set a new image for PositionIndicator.

[binod-techindustan]

@Merlin1stHere yes I tried setting the orientation. But it misbehaves

    m_map.addTransformListener(new Map.OnTransformListener() {
                            @Override
                            public void onMapTransformStart() {

                            }
                            @Override
                            public void onMapTransformEnd(MapState mapState) {
                                Bitmap bitmap=Utilities.Companion.rotateBitmap(truckBitmap,mapState.getOrientation());
                                image.setBitmap(bitmap);
                                m_mapFragment.getPositionIndicator().setMarker(image);
                            }
                        });

[Merlin1stHere]

@binod-techindustan What units does the function Utilities.Companion.rotateBitmap accept for the second parameter? Radian or Degrees? MapState.getOrientation returns degrees.

[binod-techindustan]

@Merlin1stHere it's in degrees

  fun rotateBitmap(source: Bitmap, angle: Float): Bitmap {
            val matrix = Matrix()
            matrix.postRotate(angle)
            return Bitmap.createBitmap(source, 0, 0, source.width, source.height, matrix, true)
        }

[Merlin1stHere]

@binod-techindustan 1) It is better to use OnMapRenderListener callback from MapFragment (or MapView). 2) Use -Map.getOrientarion() for angle.

@Override
public void onPreDraw() {
    Matrix matrix = new Matrix();
    matrix.postRotate(-m_map.getOrientation());
    Bitmap newBitmap = Bitmap.createBitmap(m_markerBitmap, 0, 0, m_markerBitmap.getWidth(), m_markerBitmap.getHeight(), matrix, true);
    Image newImage = new Image();
    newImage.setBitmap(newBitmap);
    m_mapFragment.getPositionIndicator().setMarker(newImage);
}

[binod-techindustan]

This is the icon we are using please check the shape. Its orientation is not working properly even after this implementation.

[binod-techindustan]

@Merlin1stHere Please check the icon

[Merlin1stHere]

@binod-techindustan Please double check your implementation. It can't depend on image.

[binod-techindustan]

@Merlin1stHere at the beginning itself, the icon rotates 45 degree. Here is the implementation

m_mapFragment.addOnMapRenderListener(new OnMapRenderListener() {
            @Override
            public void onPreDraw() {
                Matrix matrix = new Matrix();
                matrix.postRotate(-m_map.getOrientation());
                Bitmap newBitmap = Bitmap.createBitmap(truckBitmap, 0, 0, truckBitmap.getWidth(), truckBitmap.getHeight(), matrix, true);
                Image newImage = new Image();
                newImage.setBitmap(newBitmap);
                m_mapFragment.getPositionIndicator().setMarker(newImage);
            }

            @Override
            public void onPostDraw(boolean b, long l) {

            }

            @Override
            public void onSizeChanged(int i, int i1) {

            }

            @Override
            public void onGraphicsDetached() {

            }

            @Override
            public void onRenderBufferCreated() {

            }
        });

[binod-techindustan]

@Merlin1stHere please check the screenshot

[Merlin1stHere]

@binod-techindustan My code just rotates the bitmap with the map. To align image with road you should take to account heading fo the current GeoPosition. (GeoPosition.getHeading()).

[Merlin1stHere]

@binod-techindustan Map.getOrientation returns orientation in degrees relative to north.

[binod-techindustan]

@Merlin1stHere GeoPosition.getHeading() returns a double value which is the current course heading. How can we relate this value to the positioning icon?

[Merlin1stHere]

@binod-techindustan Bitmaps are always drawn relative to the screen. It does not depend on the orientation of the map. So we can rotate a bitmap using map.getOrientation to sync bitmap orientation with the map. But if you need to rotate the bitmap using the current heading (to align the bitmap with the road), you must take this angle into account during rotation. I believe the code below will work fine: matrix.postRotate(currentCourse-m_map.getOrientation())

[binod-techindustan]

Thanks @Merlin1stHere it's working fine now.

[binod-techindustan]

@Merlin1stHere here is another issue after changing this. I show the position doesn't smoothly changed the position it's like jumping for every position update. It is mostly visible when we zoom in.

[binod-techindustan]

@Merlin1stHere re drawing position indication on this listener causing crash during navigation, in some device.

m_mapFragment.addOnMapRenderListener(new OnMapRenderListener() {
            @Override
            public void onPreDraw() {
                Matrix matrix = new Matrix();
                matrix.postRotate(-m_map.getOrientation());
                Bitmap newBitmap = Bitmap.createBitmap(truckBitmap, 0, 0, truckBitmap.getWidth(), truckBitmap.getHeight(), matrix, true);
                Image newImage = new Image();
                newImage.setBitmap(newBitmap);
                m_mapFragment.getPositionIndicator().setMarker(newImage);
            }

            @Override
            public void onPostDraw(boolean b, long l) {

            }

            @Override
            public void onSizeChanged(int i, int i1) {

            }

            @Override
            public void onGraphicsDetached() {

            }

            @Override
            public void onRenderBufferCreated() {

            }
        });

[Merlin1stHere]

@binod-techindustan Do you have a stack trace?

[binod-techindustan]

@Merlin1stHere here is backtrace from Playstore crash report:

backtrace:
  #00  pc 000000000006f80c  /apex/com.android.runtime/lib64/bionic/libc.so (memset+140)
  #01  pc 000000000039f684  /vendor/lib64/egl/libGLESv2_adreno.so
  #02  pc 00000000001db740  /vendor/lib64/egl/libGLESv2_adreno.so
  #03  pc 00000000001de950  /vendor/lib64/egl/libGLESv2_adreno.so
  #04  pc 000000000014163c  /vendor/lib64/egl/libGLESv2_adreno.so
  #05  pc 000000000013e044  /vendor/lib64/egl/libGLESv2_adreno.so
  #06  pc 0000000000158ea8  /vendor/lib64/egl/libGLESv2_adreno.so
  #07  pc 0000000000171324  /vendor/lib64/egl/libGLESv2_adreno.so
  #08  pc 00000000000e4980  /vendor/lib64/egl/libGLESv2_adreno.so (glTexImage2D+144)
  #09  pc 0000000000992714  /data/app/com.example-cGvwQk3cG1IhqfrsyWkwRA==/lib/arm64/libMAPSJNI.so
  #10  pc 000000000072c830  /data/app/com.example-cGvwQk3cG1IhqfrsyWkwRA==/lib/arm64/libMAPSJNI.so
  #11  pc 00000000004dab20  /data/app/com.example-cGvwQk3cG1IhqfrsyWkwRA==/lib/arm64/libMAPSJNI.so
  #12  pc 0000000000509b0c  /data/app/com.example-cGvwQk3cG1IhqfrsyWkwRA==/lib/arm64/libMAPSJNI.so
  #13  pc 000000000050a588  /data/app/com.example-cGvwQk3cG1IhqfrsyWkwRA==/lib/arm64/libMAPSJNI.so
  #14  pc 000000000053be78  /data/app/com.example-cGvwQk3cG1IhqfrsyWkwRA==/lib/arm64/libMAPSJNI.so
  #15  pc 00000000004fcf28  /data/app/com.example-cGvwQk3cG1IhqfrsyWkwRA==/lib/arm64/libMAPSJNI.so
  #16  pc 00000000005cece0  /data/app/com.example-cGvwQk3cG1IhqfrsyWkwRA==/lib/arm64/libMAPSJNI.so
  #17  pc 000000000053be78  /data/app/com.example-cGvwQk3cG1IhqfrsyWkwRA==/lib/arm64/libMAPSJNI.so
  #18  pc 00000000004fcf28  /data/app/com.example-cGvwQk3cG1IhqfrsyWkwRA==/lib/arm64/libMAPSJNI.so
  #19  pc 00000000005cece0  /data/app/com.example-cGvwQk3cG1IhqfrsyWkwRA==/lib/arm64/libMAPSJNI.so
  #20  pc 000000000053be78  /data/app/com.example-cGvwQk3cG1IhqfrsyWkwRA==/lib/arm64/libMAPSJNI.so
  #21  pc 000000000076cce0  /data/app/com.example-cGvwQk3cG1IhqfrsyWkwRA==/lib/arm64/libMAPSJNI.so
  #22  pc 000000000076c930  /data/app/com.example-cGvwQk3cG1IhqfrsyWkwRA==/lib/arm64/libMAPSJNI.so
  #23  pc 00000000006d3c50  /data/app/com.example-cGvwQk3cG1IhqfrsyWkwRA==/lib/arm64/libMAPSJNI.so
  #24  pc 00000000006d3974  /data/app/com.example-cGvwQk3cG1IhqfrsyWkwRA==/lib/arm64/libMAPSJNI.so
  #25  pc 00000000006d8e20  /data/app/com.example-cGvwQk3cG1IhqfrsyWkwRA==/lib/arm64/libMAPSJNI.so
  #26  pc 000000000050f3e8  /data/app/com.example-cGvwQk3cG1IhqfrsyWkwRA==/lib/arm64/libMAPSJNI.so
  #27  pc 000000000050ef4c  /data/app/com.example-cGvwQk3cG1IhqfrsyWkwRA==/lib/arm64/libMAPSJNI.so
  #28  pc 00000000004f170c  /data/app/com.example-cGvwQk3cG1IhqfrsyWkwRA==/lib/arm64/libMAPSJNI.so
  #29  pc 000000000032b83c  /data/app/com.example-cGvwQk3cG1IhqfrsyWkwRA==/lib/arm64/libMAPSJNI.so
  #30  pc 000000000034afe8  /data/app/com.example-cGvwQk3cG1IhqfrsyWkwRA==/lib/arm64/libMAPSJNI.so
  #31  pc 000000000029eaf0  /data/app/com.example-cGvwQk3cG1IhqfrsyWkwRA==/lib/arm64/libMAPSJNI.so
  #32  pc 000000000016f7d8  /data/app/com.example-cGvwQk3cG1IhqfrsyWkwRA==/oat/arm64/base.odex (art_jni_trampoline+152)
  #33  pc 00000000001f8640  /data/app/com.example-cGvwQk3cG1IhqfrsyWkwRA==/oat/arm64/base.odex (com.nokia.maps.k2.onDrawFrame+496)
  #34  pc 0000000000443418  /data/app/com.example-cGvwQk3cG1IhqfrsyWkwRA==/oat/arm64/base.odex (com.nokia.maps.e0$d.run+3160)
  #35  pc 0000000000137334  /apex/com.android.runtime/lib64/libart.so (art_quick_invoke_stub+548)
  #36  pc 0000000000145fec  /apex/com.android.runtime/lib64/libart.so (art::ArtMethod::Invoke(art::Thread*, unsigned int*, unsigned int, art::JValue*, char const*)+244)
  #37  pc 00000000004b2d0c  /apex/com.android.runtime/lib64/libart.so (art::(anonymous namespace)::InvokeWithArgArray(art::ScopedObjectAccessAlreadyRunnable const&, art::ArtMethod*, art::(anonymous namespace)::ArgArray*, art::JValue*, char const*)+104)
  #38  pc 00000000004b3e20  /apex/com.android.runtime/lib64/libart.so (art::InvokeVirtualOrInterfaceWithJValues(art::ScopedObjectAccessAlreadyRunnable const&, _jobject*, _jmethodID*, jvalue const*)+416)
  #39  pc 00000000004f47e8  /apex/com.android.runtime/lib64/libart.so (art::Thread::CreateCallback(void*)+1176)
  #40  pc 00000000000d6b70  /apex/com.android.runtime/lib64/bionic/libc.so (__pthread_start(void*)+36)
  #41  pc 0000000000074eac  /apex/com.android.runtime/lib64/bionic/libc.so (__start_thread+64)

[prasannab069]

Hi i am also implementing as you mentioned above. It would be helpful if you let me know the fix for the crash mentioned above.