如何保存和还原标记数组

问题描述

我需要保存触发的位置才能在再次打开应用程序时显示它们。

我使用 int数组在 onMarkerClick 方法中保存了触发位置的数量。并使用此数组在 createMarkers 方法中创建所需的标记。 我试图保存和还原此数组，但是它不起作用。

Activity.class

的一部分

public class MapsActivity extends FragmentActivity
        implements
        OnRequestPermissionsResultCallback,OnMapReadyCallback,OnMarkerClickListener {

    
    private LatLng[] latLngArray;
    private String[] titleArray;
    private Marker[] markerArray;
    private int[] resIdArray;
    private int ARRAY_SIZE = 7;
    private int COUNTER = 0;
    private static final float disTANCE = 50;
    private boolean START_POINT_CHECKED = false;

    public final String inArrayName= "inArray";

    //public int outArray[] = new int[ARRAY_SIZE];
    public int inArray[];

    private Location mCurrentLocation;
    private GoogleMap mMap;


    private MediaPlayer mediaPlayer;

    @Override
    protected void onSaveInstanceState(@NonNull Bundle outState) {
            outState.putIntArray(outArrayName,inArray);
        super.onSaveInstanceState(outState);
    }

    @Override
    protected void onRestoreInstanceState(@NonNull Bundle inState) {
        inArray = inState.getIntArray(outArrayName);
        super.onRestoreInstanceState(inState);
    }

    @Override
    protected void onCreate(Bundle inState) {
        inArray = new int[ARRAY_SIZE];
        super.onCreate(inState);
        setContentView(R.layout.activity_maps);
        if(inState == null){
            for (int i=0; i<ARRAY_SIZE;i++){
                inArray[i]=0;
            }
        }

   private void createMarkersList(){
        markerArray = new Marker[ARRAY_SIZE];
        if(inArray[0] == 777) {

            markerArray[0] = mMap.addMarker(new MarkerOptions()
                    .position(latLngArray[0])
                    .anchor(0.5f,0.5f)
                    .icon(BitmapDescriptorFactory.fromresource(R.drawable.marker1))
                    .title(titleArray[0])
                    .snippet("0")
                    .visible(true)
            );
            markerArray[0].setTag(666);
            inArray[0] = 777;
            START_POINT_CHECKED = true;
        } else {
            markerArray[0] = mMap.addMarker(new MarkerOptions()
                    .position(latLngArray[0])
                    .anchor(0.5f,0.5f)
                    .icon(BitmapDescriptorFactory.fromresource(R.drawable.marker2))
                    .title(titleArray[0])
                    .snippet("0")
                    .visible(true)
            );
            markerArray[0].setTag(0);
        }


        if (START_POINT_CHECKED) {
            for (int i = 1; i < ARRAY_SIZE; i++) {
                if (inArray[i] == 777) {
                    markerArray[i] = mMap.addMarker(new MarkerOptions()
                            .position(latLngArray[i])
                            .anchor(0.5f,0.5f)
                            .icon(BitmapDescriptorFactory.fromresource(R.drawable.marker1))
                            .title(titleArray[i])
                            .snippet(Integer.toString(i))
                            .visible(true)
                    );
                    markerArray[i].setTag(666);
                    inArray[i]=777;
                } else {
                    markerArray[i] = mMap.addMarker(new MarkerOptions()
                            .position(latLngArray[i])
                            .anchor(0.5f,0.5f)
                            .icon(BitmapDescriptorFactory.fromresource(R.drawable.marker2))
                            .title(titleArray[i])
                            .snippet(Integer.toString(i))
                            .visible(true)
                    );
                    markerArray[i].setTag(i);
                }
            }
        } else {
            for (int i = 1; i < ARRAY_SIZE; i++) {
                markerArray[i] = mMap.addMarker(new MarkerOptions()
                        .position(latLngArray[i])
                        .anchor(0.5f,0.5f)
                        .icon(BitmapDescriptorFactory.fromresource(R.drawable.marker2))
                        .title(titleArray[i])
                        .snippet(Integer.toString(i))
                        .visible(false)
                );
                markerArray[i].setTag(i);
            }
        }

    }

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


        EnableuserLocation();

        MapStyling();

        createLatLngsList();
        createTitlesList();
        createMarkersList();
        createResIdArray();

    }

    @Override
    public boolean onMarkerClick(Marker marker) {
        int id = (int) marker.getTag();
        Log.d(TAG,"Marker" + id + "Clicked");
        if (getdistance(marker.getPosition(),new LatLng(mCurrentLocation.getLatitude(),mCurrentLocation.getLongitude())) <= disTANCE){
            if (  id == 666){
                if (mediaPlayer.isPlaying()){
                    mediaPlayer.pause();
                    return true;
                } else{
                    mediaPlayer.start();
                }
            } else {
                if(START_POINT_CHECKED) {
                    marker.setIcon(BitmapDescriptorFactory.fromresource(R.drawable.marker1));

                    if (mediaPlayer!= null){
                        mediaPlayer.reset();
                    }
                    mediaPlayer = MediaPlayer.create(this,resIdArray[id]);
                    mediaPlayer.start();
                    inArray[id] = 777;
                    marker.setTag(666);
                    COUNTER++;
                    if (COUNTER == 7){
                        mediaPlayer.setonCompletionListener(new MediaPlayer.OnCompletionListener() {
                            @Override
                            public void onCompletion(MediaPlayer mediaPlayer) {
                                showPicture();
                            }
                        });

                    }
                    return true;
                } else{
                    if(id == 0) {
                        marker.setIcon(BitmapDescriptorFactory.fromresource(R.drawable.marker1));
                        if (mediaPlayer!= null){
                            mediaPlayer.reset();
                        }
                        mediaPlayer = MediaPlayer.create(this,resIdArray[id]);
                        mediaPlayer.start();
                        inArray[id] = 777;
                        marker.setTag(666);
                        COUNTER++;
                        START_POINT_CHECKED = true;
                        showMarkers();
                        return true;
                    }else {
                        return true;
                    }
                }
            }

        }
        return false;
    }

解决方法

如果标签的标记始终相同，则可以将数组放入共享的首选项中，并在onMapReady中恢复这些位置

您应该在onMarkerClick方法中添加标记值