Draw a polygon in Android Map

Question

I would like to have ONLY the circle and not every line to every point of the circle... you have have further explanations looking at the image:

enter image description here

This is the code that I'm using right now:

    final View rootView = layoutInflater.inflate(R.layout.fragment_new_alert, paramViewGroup, false);
    FrameLayout fram_map = (FrameLayout) rootView.findViewById(R.id.fram_map);
    Button btn_draw_State = (Button) rootView.findViewById(R.id.btn_draw_State);
    isMapMoveable = false; // to detect map is movable

    SupportMapFragment customMapFragment = ((SupportMapFragment) getActivity().getSupportFragmentManager().findFragmentById(R.id.map));
    mMap = customMapFragment.getMap();

    btn_draw_State.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            isMapMoveable = !isMapMoveable;
        }
    });

    fram_map.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {
            float x = event.getX();
            float y = event.getY();

            int x_co = Math.round(x);
            int y_co = Math.round(y);

            Point x_y_points = new Point(x_co, y_co);

            LatLng latLng = mMap.getProjection().fromScreenLocation(x_y_points);

            if (!isMapMoveable) {
                return false;
            }

            int eventaction = event.getAction();
            switch (eventaction) {
                case MotionEvent.ACTION_DOWN:
                    // finger touches the screen
                    if (polyline != null){
                        polyline.setZIndex(0);
                        polyline.remove();
                        val.removeAll(polyline.getPoints());
                    }
                    val.add(latLng);
                case MotionEvent.ACTION_MOVE:
                    // finger moves on the screen
                    val.add(latLng);
                case MotionEvent.ACTION_UP:
                    // finger leaves the screen
                    drawMap();
                    break;
            }
            return true;
        }
    });
    return rootView;
}

public void drawMap() {
    rectOptions = new PolylineOptions();
    rectOptions.addAll(val);
    rectOptions.color(Color.RED);
    rectOptions.width(7);
    polyline = mMap.addPolyline(rectOptions);
}

Based on the code found here: How to draw free hand polygon in Google map V2 in Android?

Any idea? :) thanks!

Did you get boundary Lat lon of your poliline? I need boundary lat lon. — Mahmudul, Jul 11 '17 at 11:04

score 1 · Answer 1 · answered Sep 30 '15 at 09:42

    fram_map.setOnTouchListener(new View.OnTouchListener() {
                @Override
                public boolean onTouch(View v, MotionEvent event) {
                    float x = event.getX();
                    float y = event.getY();

                    int x_co = Math.round(x);
                    int y_co = Math.round(y);

                    projection = mGoogleMap.getProjection();
                    Point x_y_points = new Point(x_co, y_co);

                    LatLng latLng = mGoogleMap.getProjection().fromScreenLocation(x_y_points);
                    latitude = latLng.latitude;

                    longitude = latLng.longitude;

                    int eventaction = event.getAction();
                    switch (eventaction) {
                        case MotionEvent.ACTION_DOWN:
                            // finger touches the screen

                            if (mMarkerPoints != null) {
                                mMarkerPoints = new ArrayList<>();
                            }
                            mGoogleMap.clear();
                            mMarkerPoints.add(new LatLng(latitude, longitude));

                        case MotionEvent.ACTION_MOVE:
                            // finger moves on the screen
                            mMarkerPoints.add(new LatLng(latitude, longitude));
                            Draw_Map();
                            break;

                        case MotionEvent.ACTION_UP:
                            // finger leaves the screen
                            Draw_Map_polygon();
                            break;
                    }

                    if (Is_MAP_Moveable == true) {
                        return true;
                    } else {
                        return false;
                    }

                }
            });

//----------- for Making Polygone

    public void Draw_Map_polygon() {
            rectOptions = new PolygonOptions();
            rectOptions.addAll(mMarkerPoints);
            rectOptions.strokeColor(Color.RED);
            rectOptions.strokeWidth(5);
            rectOptions.fillColor(Color.parseColor("#40c4c4c4"));
            polygon = mGoogleMap.addPolygon(rectOptions);
            mGoogleMap.getUiSettings().setAllGesturesEnabled(true);

        }

//----------- When Moving your Hand


        public void Draw_Map() {
            mGoogleMap.addPolyline(new PolylineOptions()
                    .addAll(mMarkerPoints)
                    .width(5)
                    .color(Color.RED));
        }

where i need to clear the list of polygonOptions like i have to clear everything even the list of old latlong? — Asad Mukhtar, Jul 01 '19 at 20:50

score 0 · Accepted Answer · answered Jul 24 '14 at 23:08

0

The problem was because of the missing break in the switch

answered Jul 24 '14 at 23:08

Filnik

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You can mark your answer as an answer and this will help others with the same problem. – Lrrr Jul 27 '14 at 05:21
1

yes I know, but I can do it only after 24h, I was waiting for it! :) – Filnik Jul 27 '14 at 16:20

Draw a polygon in Android Map

2 Answers2