java - 如何更改 map 中标记的颜色？

Question

我需要一些帮助来更改标记颜色，在 android 中使用 android studio。

我把所有的标记都放在了 map 上。完美。

我想在用户选择点时显示一条消息。为了确定，用户必须在标记中单击两次。

一切正常，用户这样做，我改变颜色和标记改变。

但是，当我点击另一个标记或 map 中的任何地方时，颜色会恢复原来的颜色。

看来我改错了标记(另一个对象)。

这是打印标记的方法

public void plot(){
        NumberFormat format = new DecimalFormat("0");
        for (Coordinate c: pointsList) {
            LatLng temp = new LatLng(c.getLat(), c.getLng());
            Marker marker = mMap.addMarker(new MarkerOptions()
                    .position(temp)
                    .title("Ponto " + c.getDescricao())
                    .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED)));
            marker.setTag("Ponto " + c.getDescricao());
        }
    }

我有一个他的听众，它显示一条消息，有 2 个选项，确认或取消:

@Override
    public void onDialogPositiveClick(DialogFragment dialog) {
        getSelectedPoint().setSnippet("Selected!");
                getSelectedPoint().setIcon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_AZURE));

    }

和

@Override
public void onDialogNegativeClick(DialogFragment dialog) {
    Toast.makeText(getBaseContext(), "Cancel the dialog", Toast.LENGTH_SHORT).show();
}

有人可以帮助我吗？我需要颜色保持天蓝色，而不是变回红色。

EDIT1:当我再次点击标记时，颜色是正确的，天蓝色。但是，当点击另一个地方时，颜色会变回红色。

EDIT2:代码

public class Navigator extends FragmentActivity
        implements FragmentoDialogo.NoticeDialogListener, OnMapReadyCallback, GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener {      

    private static Marker pontoSelecionado;    

    public Marker getPontoSelecionado() {
        return pontoSelecionado;
    }

    public void setPontoSelecionado(Marker pontoSelecionado) {
        this.pontoSelecionado = pontoSelecionado;
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        mGoogleApiClient = new GoogleApiClient.Builder(this)
                .enableAutoManage(this /* FragmentActivity */,
                        this /* OnConnectionFailedListener */)
                .addConnectionCallbacks(this)
                .addApi(LocationServices.API)
                .addApi(Places.GEO_DATA_API)
                .addApi(Places.PLACE_DETECTION_API)
                .build();
        mGoogleApiClient.connect();

        Bundle b = getIntent().getExtras();
        pointsList = b.getParcelableArrayList("Points");

        setContentView(R.layout.navigator_ac);

        MapFragment mapFragment = (MapFragment) getFragmentManager()
                .findFragmentById(R.id.map);
        mapFragment.getMapAsync(this);
    }

    @Override
    public void onMapReady(GoogleMap googleMap) {
        mMap = googleMap;

        plotarPontosDeColeta();
        plotarCaminhamento();

        escutarCliqueMarcador();
        // Turn on the My Location layer and the related control on the map.
        updateLocationUI();

        // Get the current location of the device and set the position of the map.
        getDeviceLocation();

        LatLng ponto1 = new LatLng(pointsList.get(1).getLat(), pointsList.get(1).getLng());

        CameraPosition cameraPos = new CameraPosition.Builder().target(ponto1)
                .zoom(45).bearing(20).tilt(80).build();

        googleMap.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPos), null);
    }

    public void plotarPontosDeColeta(){
        NumberFormat format = new DecimalFormat("0");
        for (Coordinate c: pointsList) {
            LatLng temp = new LatLng(c.getLat(), c.getLng());
            Marker marker = mMap.addMarker(new MarkerOptions()
                    .position(temp)
                    .title("Ponto " + c.getDescricao())
                    .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED)));
            marker.setTag("Ponto " + c.getDescricao());
        }
    }

    private void plotarCaminhamento() {
        NumberFormat format = new DecimalFormat("0");

        ArrayList<Polyline> listaLinhas = new ArrayList<>();
        final ArrayList<MarkerOptions> listaMarcadores = new ArrayList<>();
        PolylineOptions lineOptions;

        try {
            for (int i=0; i<pointsList.size(); i++){
                LatLng aux1 = new LatLng(pointsList.get(i).getLat(),pointsList.get(i).getLng());
                LatLng aux2 = new LatLng(pointsList.get(i+1).getLat(),pointsList.get(i+1).getLng());
                lineOptions = new PolylineOptions().clickable(true).add(aux1).add(aux2);
                Polyline polyline = mMap.addPolyline(lineOptions);
                polyline.setTag(i);
                listaLinhas.add(polyline);

                listaMarcadores.add(new MarkerOptions()
                        .position(PointsHandler.encontrarPontoMedio(aux1, aux2))
                        .alpha(0f)
                        .title(""+ format.format(pointsList.get(i).getDistanciaProximoPonto()) + "m"));
            }
        } catch (Exception e){
            //TODO
        }

        mMap.setOnPolylineClickListener(new GoogleMap.OnPolylineClickListener(){
            @Override
            public void onPolylineClick(Polyline polyline)
            {
                int tag = (Integer) polyline.getTag();
                mMap.addMarker(listaMarcadores.get(tag)).showInfoWindow();
            }
        });
    }

    public void escutarCliqueMarcador(){
        mMap.setOnMarkerClickListener(new GoogleMap.OnMarkerClickListener() {
            @Override
            public boolean onMarkerClick(Marker marker) {
                if (getPontoSelecionado() == null) {
                    setPontoSelecionado(marker);
                    Toast.makeText(getBaseContext(), "Clique novamente para confirmar!", Toast.LENGTH_SHORT).show();
                    return false;
                }

                if (getPontoSelecionado().getTag().equals(marker.getTag())) {
                    showDialog();
                } else {
                    setPontoSelecionado(marker);
                    Toast.makeText(getBaseContext(), "Clique novamente para confirmar!", Toast.LENGTH_SHORT).show();
                }

                return false;
            }
        });
    }

    public void showDialog() {
        DialogFragment dialog = new FragmentoDialogo();
        dialog.show(getFragmentManager(), "FragmentoDialogo");
    }
    @Override
    public void onDialogPositiveClick(DialogFragment dialog) {
        getPontoSelecionado().setSnippet("Coleta efetuada");
        getPontoSelecionado().setIcon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_AZURE));
        getPontoSelecionado().showInfoWindow();            
    }

    @Override
    public void onDialogNegativeClick(DialogFragment dialog) {
        Toast.makeText(getBaseContext(), "Ponto não confirmado", Toast.LENGTH_SHORT).show();
    }
}

Answer 1

我自己解决了。

我创建了一个 Coordinate vector 作为类属性，在构造函数中启动并在 plot() 方法中添加到该 vector 。出于某种原因，我正在处理不同的实例。