Get position from two markers - onMarkerDragEnd

I create markers like this:

            Marker MO =  mMap.addMarker(new MarkerOptions()
                .position(latLng)
                .draggable(true)
                .icon(BitmapDescriptorFactory.fromBitmap(icon))
        );

            Marker M2 =  mMap.addMarker(new MarkerOptions()
                .position(latLng)
                .draggable(true)
                .icon(BitmapDescriptorFactory.fromBitmap(icon2))
        );

And I want to get its coordinates when each of them is dragged / deleted, but when using this:

             mMap.setOnMarkerDragListener(new OnMarkerDragListener() {

            @Override
            public void onMarkerDragStart(Marker M0) {  }

            @Override
            public void onMarkerDragEnd(Marker M0) {

                LatLng pos = M0.getPosition();


                TextView err = (TextView)findViewById(R.id.text1);
                err.setText("M0" + pos.latitude + "," + pos.longitude);

            }

            @Override
            public void onMarkerDrag(Marker M0) {     }

        });



        mMap.setOnMarkerDragListener(new OnMarkerDragListener() {

            @Override
            public void onMarkerDragStart(Marker M2) {  }

            @Override
            public void onMarkerDragEnd(Marker M2) {

                LatLng pos2 = M2.getPosition();


                TextView err2 = (TextView)findViewById(R.id.text2);
                err2.setText("M2" + pos2.latitude + "," + pos2.longitude);
            }

            @Override
            public void onMarkerDrag(Marker M2) {     }
        });

I can get the coordinates from both markers, but the coordinates from M0 are attached to M2 "text". I think the problem is creating markers, because Android Studio says that the variables M0 and M2 are never used. Also I'm not sure if using mMap.setOnMarkerDragListener (the new OnMarkerDragListener () {helps twice. How can I fix this?

Thank.