从标记中获取其他值

Question

我遇到了这个问题，我希望有人能引导我找到解决方案，到目前为止我已经花了3天时间。

问题

我有2个活动，活动 A 是从JSON列表填充的列表视图。活动 B 是Google地图v2，基于相同的json列表但在地图上不在列表中。

在活动 A 列表中有onItemclicklistener，当我点击它时显示另一个活动，它的工作正常。这里没问题。一切都像是假设的那样。

在活动 B 上有地图片段，并且它也填充了来自JSON列表的lat-lng值。所以地图上有10个+标记。因此，当我点击标记时，我会得到名称和地址，并且工作正常。

这就是我想要的

当我点击列表中的项目时，它会带我参加活动 C 。并且有一些文本视图显示公司哪些日子是公开的。这一步已经完成，它的工作正常以及它所应有的一切。

当我点击地图时，有标记，所以我有onInfoWindowClick()。它也没关系，但我如何从onInfoWindowClick()获得更多价值？

我的意思是，我可以从标记中获取（getSnippet和getTitle）但是我在列表中有其他值，例如name，days，id。我得到的只是.getsnippet和getTitle通过标记。

我非常担心这个问题。 我真的想在列表上做同样的事情。当我按下列表时它获取所有值但是当我在地图上时我只能获得带有标题和片段的标记窗口。我很抱歉，如果我无法解释好，请随时问我是否有更多你想看的代码。

                for (HashMap<String, String> hashMap : contactList) {
            map.addMarker(new MarkerOptions()
              .position(new LatLng(Double.valueOf(hashMap.get(TAG_LAT)) , Double.valueOf(hashMap.get(TAG_LNG))))
              .title(hashMap.get(TAG_ADDRESS))
              .snippet(hashMap.get(TAG_NAME)) );

---

@Override
public void onInfoWindowClick(Marker marker) {

    marker.getTitle();
    marker.getSnippet(); 
}

更新代码

    public class MapBased extends AbstractMapActivity implements OnNavigationListener,OnInfoWindowClickListener
{
    private static final String TAG_Location = "location_id";
    private static final String TAG_Company = "company_id";
    private static final String TAG_PLACE = "place";
    private static final String TAG_POSTAL = "postal";
    private static final String TAG_CITY = "city";
    private static final String TAG_MONDAY = "monday";
    private static final String TAG_TUESDAY = "tuesday";
    private static final String TAG_WEDNESDAY = "wednesday";
    private static final String TAG_THURSDAY = "thursday";
    private static final String TAG_FRIDAY = "friday";
    private static final String TAG_SATURDAY = "saturday";
    private static final String TAG_SUNDAY = "sunday";
    private static final String TAG_TYPE = "type";
    private static final String TAG_NOCAR = "nocar";

    private static final String TAG_NAME = "name";
    private static final String TAG_LAT = "lat";
    private static final String TAG_LNG = "lng";
    private static final String TAG_ADDRESS = "address";
    private static final String TAG = "Debug of Project"; // 

     private String a;
private String b;

private double my_lat;
private double my_lng;

private static final String STATE_NAV="nav";
private static final int[] MAP_TYPE_NAMES= { R.string.normal, R.string.hybrid, R.string.satellite, R.string.terrain };
private static final int[] MAP_TYPES= { GoogleMap.MAP_TYPE_NORMAL, GoogleMap.MAP_TYPE_HYBRID, GoogleMap.MAP_TYPE_SATELLITE,
                                GoogleMap.MAP_TYPE_TERRAIN };
private GoogleMap map=null;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    SQLiteDatabase db = openOrCreateDatabase("mydb.db", Context.MODE_PRIVATE, null);
    db.execSQL("CREATE TABLE IF NOT EXISTS gps_kordinater (ID INTEGER PRIMARY KEY AUTOINCREMENT, Latitude REAL, Longitude REAL);");

    String query = "SELECT Latitude,Longitude FROM gps_kordinater WHERE Id = (SELECT MAX(Id) FROM gps_kordinater)";
    Cursor cursor = db.rawQuery(query, null);
    if(cursor != null)
    {
    cursor.moveToFirst();
     a = cursor.getString(0);

     b = cursor.getString(1);
    }


   String url = "http://example.com";

   my_lat = Double.valueOf(a);  
   my_lng = Double.valueOf(b);


   db.close();

    // now enabled if disabled = ingen support for jb aka 4.0
     if (android.os.Build.VERSION.SDK_INT > 9) {
          StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
          StrictMode.setThreadPolicy(policy);
     }

    ArrayList<HashMap<String, String>> contactList = new ArrayList<HashMap<String, String>>();
    JSONParser jParser = new JSONParser();
    JSONArray json = jParser.getJSONFromUrl(url);
    try {
           for(int i = 0; i < json.length(); i++){
                JSONObject c = json.getJSONObject(i);

                String lat = c.getString(TAG_LAT);
                String lng = c.getString(TAG_LNG);
                String name = c.getString(TAG_NAME);
                String adresse = c.getString(TAG_ADDRESS);

                String location_id = c.getString(TAG_Location);
                String company_id = c.getString(TAG_Company);
                String place = c.getString(TAG_PLACE) ; 
                String postal = c.getString(TAG_POSTAL);
                String city = c.getString(TAG_CITY);
                String monday = c.getString(TAG_MONDAY);
                if(c.getString(TAG_MONDAY).isEmpty())
                    {
                        monday="Lukket";
                    }
                else
                    {
                        monday=c.getString(TAG_MONDAY);
                    }

                String tuesday = c.getString(TAG_TUESDAY);
                if(c.getString(TAG_TUESDAY).isEmpty())
                    {
                        tuesday="Lukket";
                    }
                else
                    {
                        tuesday=c.getString(TAG_TUESDAY);
                    }

                String wednesday = c.getString(TAG_WEDNESDAY);  
                if(c.getString(TAG_WEDNESDAY).isEmpty())
                    {
                        wednesday="Lukket";
                    }
                else
                    {
                        wednesday=c.getString(TAG_WEDNESDAY);
                    }

                String thursday = c.getString(TAG_THURSDAY);
                if(c.getString(TAG_THURSDAY).isEmpty())
                    {
                        thursday="Lukket";
                    }
                else
                    {
                        thursday=c.getString(TAG_THURSDAY);
                    }

                String friday = c.getString(TAG_FRIDAY);
                if(c.getString(TAG_FRIDAY).isEmpty())
                    {
                        friday="Lukket";
                    }
                else
                    {
                        friday=c.getString(TAG_FRIDAY);
                    }

                String saturday = c.getString(TAG_SATURDAY);
                if(c.getString(TAG_SATURDAY).isEmpty())
                    {
                        saturday="Lukket";
                    }
                else
                    {
                        saturday=c.getString(TAG_SATURDAY);
                    }   

                String sunday=c.getString(TAG_SUNDAY);
                if(c.getString(TAG_SUNDAY).isEmpty())
                    {
                        sunday="Lukket";
                    }
                else
                    {
                        sunday=c.getString(TAG_SUNDAY);
                    }



                String nocar = c.getString(TAG_NOCAR);
                String type = c.getString(TAG_TYPE);


            // creating new HashMap
            HashMap<String, String> map2 = new HashMap<String, String>();

            // adding each child node to HashMap key => value

            map2.put(TAG_LAT, lat);
            map2.put(TAG_LNG, lng);

            map2.put(TAG_NAME, name);
            map2.put(TAG_ADDRESS, adresse);
            map2.put(TAG_Location, location_id);
            map2.put(TAG_Company, company_id);
            map2.put(TAG_PLACE, place);
            map2.put(TAG_POSTAL, postal);
            map2.put(TAG_CITY, city);
            map2.put(TAG_MONDAY, monday);
            map2.put(TAG_TUESDAY, tuesday);
            map2.put(TAG_WEDNESDAY, wednesday);
            map2.put(TAG_THURSDAY, thursday);
            map2.put(TAG_FRIDAY, friday);
            map2.put(TAG_SATURDAY, saturday);
            map2.put(TAG_SUNDAY, sunday);
            map2.put(TAG_TYPE, type);
            map2.put(TAG_NOCAR, nocar);

            // adding HashList to ArrayList
            contactList.add(map2);

             Log.d(TAG, "Hashmap 1: " + map2); 

             Log.d(TAG, "Hashmap 2: " + map2.values()); 
             Log.d(TAG, "array 4: " + contactList); 

           }


           Log.d(TAG, "array 5: " + contactList); 

    } catch (JSONException e) {
        e.printStackTrace();
        Log.e("JSON Parser", "Error parsing data " + e.toString());

    }

    if (readyToGo()) {
        setContentView(R.layout.map_based);

        SupportMapFragment mapFrag=
                (SupportMapFragment)getSupportFragmentManager().findFragmentById(R.id.map2);
        initListNav();

        map=mapFrag.getMap();

        CameraUpdate center= CameraUpdateFactory.newLatLng(new LatLng(my_lat , my_lng));

        CameraUpdate zoom=CameraUpdateFactory.zoomTo(10);
        map.moveCamera(center);
        map.animateCamera(zoom);

        for (HashMap<String, String> hashMap : contactList) {
            map.addMarker(new MarkerOptions()
              .position(new LatLng(Double.valueOf(hashMap.get(TAG_LAT)) , Double.valueOf(hashMap.get(TAG_LNG))))
              .title(hashMap.get(TAG_ADDRESS))
              .snippet(hashMap.get(TAG_NAME))

              );
        }

        map.setInfoWindowAdapter(new PopupMapBasedAdapter(getLayoutInflater()));
        map.setOnInfoWindowClickListener(this);

    }

     Button btn_web = (Button) findViewById(R.id.footer_list_btn);
        btn_web.setOnClickListener(new View.OnClickListener() {
            @Override
                public void onClick(View view) {
                //myVib.vibrate(50);
                finish();
                }
            });
}

@Override
public boolean onNavigationItemSelected(int itemPosition, long itemId) {
    map.setMapType(MAP_TYPES[itemPosition]);
    return(true);
}

@Override
public void onSaveInstanceState(Bundle savedInstanceState) {
    super.onSaveInstanceState(savedInstanceState);
    savedInstanceState.putInt(STATE_NAV,getSupportActionBar().getSelectedNavigationIndex());
}

@Override
public void onInfoWindowClick(Marker marker) {

    marker.getTitle();
    marker.getSnippet(); 
}

   @Override
    public void onRestoreInstanceState(Bundle savedInstanceState) {
    super.onRestoreInstanceState(savedInstanceState);  
    getSupportActionBar().setSelectedNavigationItem(savedInstanceState.getInt(STATE_NAV));
    }

    private void initListNav() {
ArrayList<String> items=new ArrayList<String>();
ArrayAdapter<String> nav=null;
ActionBar bar=getSupportActionBar();

    for (int type : MAP_TYPE_NAMES) {
        items.add(getString(type));
    }
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
        nav=
                new ArrayAdapter<String>(
                        bar.getThemedContext(),
                        android.R.layout.simple_spinner_item,
                        items);
                }
    else {
        nav=
            new ArrayAdapter<String>( 
                    this,
                   android.R.layout.simple_spinner_item,
                   items);
                }

    nav.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    bar.setNavigationMode(ActionBar.NAVIGATION_MODE_LIST);
    bar.setListNavigationCallbacks(nav, this);  
}


    }

Answer 1

您不能再向标记添加数据，除非您将所有数据都添加到代码段中。

因此，如果您想为标记添加更多数据，则必须将其存储在与标记链接的外部变量中。

Each made marker has an unique ID.

您可以使用此信息将映射到此ID的任何其他数据保存在单独的变量中。

示例：

创建您可以访问的变量：

 /**
  * Create your variable where you store all your data mapped to the marker ID, 
  * make it accessible where you want.
  * The key of this hashmap is your marker ID, the value is another Map with extra data
  */
 HashMap<String, HashMap> extraMarkerInfo = new HashMap<String, HashMap>();

选项1更改标记代码，以便向此变量添加额外数据

for (HashMap<String, String> hashMap : contactList) {
     // Create your marker like normal, nothing changes
     Marker marker = map.addMarker(new MarkerOptions()
         .position(new LatLng(Double.valueOf(hashMap.get(TAG_LAT)) , Double.valueOf(hashMap.get(TAG_LNG))))
         .title(hashMap.get(TAG_ADDRESS))
         .snippet(hashMap.get(TAG_NAME)));

     // When you created the marker you store the extra data from your JSON in another variable (HashMap for example)
     HashMap<String, String> data = new HashMap<String, String>();

     data.put(TAG_Location,hashMap.get(TAG_Location));
     data.put(TAG_Company,hashMap.get(TAG_Company));
     data.put(TAG_PLACE,hashMap.get(TAG_PLACE));
     data.put(TAG_POSTAL,hashMap.get(TAG_POSTAL));
     data.put(TAG_CITY,hashMap.get(TAG_CITY));
     data.put(TAG_MONDAY,hashMap.get(TAG_MONDAY));
     data.put(TAG_TUESDAY,hashMap.get(TAG_TUESDAY));
     data.put(TAG_WEDNESDAY,hashMap.get(TAG_WEDNESDAY));
     data.put(TAG_THURSDAY,hashMap.get(TAG_THURSDAY));
     data.put(TAG_FRIDAY,hashMap.get(TAG_FRIDAY));
     data.put(TAG_SATURDAY,hashMap.get(TAG_SATURDAY));
     data.put(TAG_SUNDAY,hashMap.get(TAG_SUNDAY));
     data.put(TAG_TYPE,hashMap.get(TAG_TYPE));
     data.put(TAG_NOCAR,hashMap.get(TAG_NOCAR));

     // Save this marker data in your previously made HashMap mapped to the marker ID. So you can get it back based on the marker ID
     extraMarkerInfo.put(marker.getId(),data);

}

EASY OPTION 2只需将整个地图保存在外部变量中

for (HashMap<String, String> hashMap : contactList) {
     // Create your marker like normal, nothing changes
     Marker marker = map.addMarker(new MarkerOptions()
         .position(new LatLng(Double.valueOf(hashMap.get(TAG_LAT)) , Double.valueOf(hashMap.get(TAG_LNG))))
         .title(hashMap.get(TAG_ADDRESS))
         .snippet(hashMap.get(TAG_NAME)));

     // Just save the entire json hashmap into the external variable
     extraMarkerInfo.put(marker.getId(),hashMap);

}

现在您可以随时访问extraMarkerInfo，使用getID()知道标记ID。

@Override
public void onInfoWindowClick(Marker marker) {

    String title = marker.getTitle();
    String snippet = marker.getSnippet(); 

    // Get extra data with marker ID
    HashMap<String, String> marker_data = extraMarkerInfo.get(marker.getId());

    // Getting the data from Map
    String location = marker_data.get(TAG_Location);
    String company = marker_data.get(TAG_Company);
    String place = marker_data.get(TAG_PLACE);
    //.. etc etc
}

这只是使用HashMaps的一个小例子，但您可以根据自己的喜好使用不同的解决方案。

Answer 2

我猜你必须有一个列表，其中包含MapActivity中ListAcivity中的所有信息。当用户单击标记时，您会在列表中查找该特定对象（我猜它是联系人）并获取您需要的其他信息。

Answer 3

@Override
    public boolean onMarkerClick(Marker marker) {
        // TODO Auto-generated method stub
        String selected_marker=marker.getTitle();
        return false;
    }

然后你可以根据点击哪个标记（你想要哪个操作）来工作。在这里你知道点击了哪个标记...

Answer 4

这样做的一个非常好且简单的方法是 - 每当您向地图添加标记时，请在HashMap<Marker, <WhateverDataYouNeed> extraMarkerData

之类的内容中引用它。

然后，只要您需要其数据，您只需要调用extraMarkerData.get(<yourMarker>)即可将其返回。 simples。

感谢这位撰写教程的人，我发现它对于我需要的内容非常广泛，但它提供了一个简单的想法：

http://bon-app-etit.blogspot.be/2012/12/add-informationobject-to-marker-in.html

我的额外数据如下：

private HashMap<Marker,HashMap<String,String>> markerUserData;

然后每当我向地图添加标记时，我都会确保使用标记作为关键字来引用其数据

Marker marker = map.addMarker(new MarkerOptions()
        .position(new LatLng(<lat>,<lng>)
        .title(<markerTitle>)
        .snippet(<markerSnippet>)
);

markerUserData.put(marker,<myExtraMarkerDataHashMap>);    //add reference to marker data

因为我有自己的班级来处理OnInfoWindowClickListener，所以我做了一个公开的吸气鬼

public HashMap<String,String> getDataforMarker(Marker marker){
    return extraMarkerData.get(marker);
}

OnInfoWindowClickListener：

@Override
public void onInfoWindowClick(Marker marker) {
    Log.i("SFCT","Data for marker = "+activity.getDataforMarker(marker));
}

Answer 5

 LatLng latLng = new LatLng(lat, lng);
        MarkerOptions markerOptions = new MarkerOptions();
        markerOptions.position(latLng);
        mMap.clear();
        markerOptions.title("Current Position");
        markerOptions.icon(BitmapDescriptorFactory.fromResource(R.drawable.marker));
        markerOptions.getPosition();
        mCurrLocationMarker = mMap.addMarker(markerOptions);