Question

我想将Google地图中的值传递给其他活动。到目前为止，我使用JSON解析器获取值并插入到Google Map上。但是现在我想在用户点击“Infowindow”时将“ID”传递给其他活动。我怎样才能做到这一点？

public class MainActivity extends FragmentActivity {
    String titlee, snipett, ii,a;
    Double latitude, longitude;
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        //*** Permission StrictMode
        if (android.os.Build.VERSION.SDK_INT > 9) {
            StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
            StrictMode.setThreadPolicy(policy);
        }

        ArrayList<HashMap<String, String>> location = null;
        String url = "http://xxxxxxxxx/xxxxxx/krishi.php";
        try {

            JSONArray data = new JSONArray(request(url));

            location = new ArrayList<HashMap<String, String>>();
            HashMap<String, String> map;

            for(int i = 0; i < data.length(); i++){
                JSONObject c = data.getJSONObject(i);

                map = new HashMap<String, String>();
                map.put("LocationID", c.getString("id"));
                map.put("Latitude", c.getString("latitude"));
                map.put("Longitude", c.getString("longitude"));
                map.put("Type", c.getString("listed_name"));
                map.put("Title", c.getString("title"));
                location.add(map);

            }

        } catch (JSONException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        GoogleMap googleMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.googleMap)).getMap();

        latitude = Double.parseDouble(location.get(0).get("Latitude"));
        longitude = Double.parseDouble(location.get(0).get("Longitude"));
        LatLng coordinate = new LatLng(latitude, longitude);
        googleMap.animateCamera(CameraUpdateFactory.newLatLngZoom(coordinate, 12));

        for (int i = 0; i < location.size(); i++) {
            latitude = Double.parseDouble(location.get(i).get("Latitude"));
            longitude = Double.parseDouble(location.get(i).get("Longitude"));
            final String name = location.get(i).get("Title");
            String sel = location.get(i).get("Type");
            a = location.get(i).get("LocationID");

            MarkerOptions markerOptions = new MarkerOptions();
           markerOptions.position(new LatLng(latitude, longitude)).title(name).snippet(sel);
            Marker marker = googleMap.addMarker(markerOptions);
            marker.showInfoWindow();

        }

        googleMap.setInfoWindowAdapter(new GoogleMap.InfoWindowAdapter() {



            @Override
            public View getInfoWindow(Marker arg0) {
                return null;
            }


            @Override
            public View getInfoContents(Marker arg0) {
                View v = getLayoutInflater().inflate(R.layout.custom_info_window, null);


                titlee = arg0.getTitle();
                snipett = arg0.getSnippet();
                TextView tvLat = (TextView) v.findViewById(R.id.title);
                TextView tvLng = (TextView) v.findViewById(R.id.snippet);
                tvLat.setText("Area Name: " + titlee);
                tvLng.setText("Type: " + snipett);

                return v;

            }

        });


        googleMap.setOnInfoWindowClickListener(new GoogleMap.OnInfoWindowClickListener() {
            @Override
            public void onInfoWindowClick(Marker marker) {





            }
        });



    }

    private String request(String urlString) {
        // TODO Auto-generated method stub

        StringBuilder chaine = new StringBuilder("");
        try{
            URL url = new URL(urlString);
            HttpURLConnection connection = (HttpURLConnection)url.openConnection();
            connection.setRequestProperty("User-Agent", "");
            connection.setRequestMethod("POST");
            connection.setDoInput(true);
            connection.connect();

            InputStream inputStream = connection.getInputStream();

            BufferedReader rd = new BufferedReader(new InputStreamReader(inputStream));
            String line = "";
            while ((line = rd.readLine()) != null) {
                chaine.append(line);
            }

        } catch (IOException e) {
            // writing exception to log
            e.printStackTrace();
        }

        return chaine.toString();
    }

}

Answer 1

获取ID并通过

传递给新的活动

Intent i = new Intent(FirstScreen.this, SecondScreen.class);   
i.putExtra("Id", intId);
startActivity(i);

在SecondScreen中检索它，如：

Bundle extras = intent.getExtras();
    if(extras != null)
    Int id = extras.getInt("Id"); // retrieve the data using keyName

Answer 2

我这样做了：

初始化变量：

 private GoogleMap mMap;
 private HashMap<Marker, Integer> mHashMap = new HashMap<Marker,Integer>();
 private ArrayList<MyCustomModelClass> myList = new ArrayList<MyCustomModelClass>();

使用你的arraylist在谷歌地图上添加标记：

 for (int i = 0; i < myList.size(); i++) {
 double latitude = myList.getLatitude();
 double longitude = myList.getLongitude();
 Marker marker = mMap.addMarker(new MarkerOptions().position(new LatLng(latitude,longitude))).title(myList.getTitle())
                                    .icon(BitmapDescriptorFactory.fromResource(R.drawable.location_icon));
 mHashMap.put(marker, i);

}

在标记点击侦听器上：

@Override
public boolean onMarkerClick(Marker marker) { 
   int pos = mHashMap.get(marker);
   Log.i("Position of arraylist", pos+"");
}

如何将Google Map的价值传递给其他活动？

2 个答案: