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我正在尝试通过传递位置名称来获取位置或想在地图上显示位置。
我做了一个在地图上显示当前位置的示例项目。但我不明白如何在谷歌地图上传递名称和搜索地点。
这是我的代码，可以帮助您理解我的问题。 

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    mapView = (MapView) findViewById(R.id.mapview);
    mapView.setBuiltInZoomControls(true);
    mapView.setSatellite(true);
    mapController = mapView.getController();
    mapController.setZoom(14); // Zoom 1 is world view
    locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
    locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0,
        0, new GeoUpdateHandler());

    myLocationOverlay = new MyLocationOverlay(this, mapView);
    mapView.getOverlays().add(myLocationOverlay);

    String value = "kasarwadi,pune";
    // Do something with value!


    Geocoder geoCoder = new Geocoder(getBaseContext(), Locale.getDefault());    
      try {
          List<Address> addresses = geoCoder.getFromLocationName(
              value, 5);
          String add = "";
          if (addresses.size() > 0) {
           GeoPoint   p = new GeoPoint(
                      (int) (addresses.get(0).getLatitude() * 1E6), 
                      (int) (addresses.get(0).getLongitude() * 1E6));
              mapController.animateTo(p);    
              mapView.invalidate();
          }    
      } catch (IOException e) {
          e.printStackTrace();
      }

    myLocationOverlay.runOnFirstFix(new Runnable() {
      public void run() {
        mapView.getController().animateTo(myLocationOverlay.getMyLocation());
      }
    });

    Drawable drawable = this.getResources().getDrawable(R.drawable.point);
    itemizedoverlay = new MyOverlays(this, drawable);
    createMarker();
  }

  @Override
  protected boolean isRouteDisplayed() {
    return false;
  }

  public class GeoUpdateHandler implements LocationListener {

    @Override
    public void onLocationChanged(Location location) {
         String value = "kasarwadi,pune";
         // Do something with value!


         Geocoder geoCoder = new Geocoder(getBaseContext(), Locale.getDefault());    
           try {
               List<Address> addresses = geoCoder.getFromLocationName(
                   value, 5);
               String add = "";
               if (addresses.size() > 0) {
                GeoPoint   p = new GeoPoint(
                           (int) (addresses.get(0).getLatitude() * 1E6), 
                           (int) (addresses.get(0).getLongitude() * 1E6));
                   mapController.animateTo(p);    
                   mapView.invalidate();
               }    
           } catch (IOException e) {
               e.printStackTrace();
           }


    }

    @Override
    public void onProviderDisabled(String provider) {
    }

    @Override
    public void onProviderEnabled(String provider) {
    }

    @Override
    public void onStatusChanged(String provider, int status, Bundle extras) {
    }
  }

  private void createMarker() {
    GeoPoint p = mapView.getMapCenter();
    OverlayItem overlayitem = new OverlayItem(p, "", "");
    itemizedoverlay.addOverlay(overlayitem);
    if (itemizedoverlay.size() > 0) {
      mapView.getOverlays().add(itemizedoverlay);
    }
  }

  @Override
  protected void onResume() {
    super.onResume();
    myLocationOverlay.enableMyLocation();
    myLocationOverlay.enableCompass();
  }

  @Override
  protected void onPause() {
    super.onPause();
    myLocationOverlay.disableMyLocation();
    myLocationOverlay.disableCompass();
  }

我还生成 MD5 指纹和有效的 api 密钥。但是当我试图显示它时只显示当前位置，但我需要显示名称经过我的位置。
请给我一个参考或提示。
提前致谢。

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2 回答 2

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由于您要求最多 5 个地址

List<Address> addresses = geoCoder.getFromLocationName(value, 5);

第 5 个或最后一个位置的纬度和经度有可能与第 1 个值完全不同（更合适）。

并且您正在尝试动画到最后一个位置。尝试动画到第一个位置。

于 2012-12-27T13:42:55.070 回答
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我在我的模拟器上也遇到了类似的问题，可能它最终会在设备上工作（尚未在设备上测试过！）所以我解决这个问题的方法是使用另一个原始 api 将地址转换为地理点......

所以，我建议不要删除或更改您当前的代码（因为它对我来说看起来不错，谁知道最终可能会在设备场景中工作），但是在您的 catch (IOException) 子句中调用此方法 tryAlternative()。我正在写下 tryAlternative()

private void tryAltesrnative(String address) {

    String strCompleteAddress = address.replaceAll(" ", "%20");
    String streetName = strCompleteAddress.substring(strCompleteAddress.indexOf(",")+1);
    String cityName = streetName.substring(streetName.indexOf(",")+1);
    String addressToToast = "";


    HttpGet httpGet = new HttpGet("http://maps.google." + "com/maps/api/geocode/json?address=" + address + "ka&sensor=false");


    HttpClient client = new DefaultHttpClient();
    HttpResponse response;
    StringBuilder stringBuilder = new StringBuilder();

    try {
        response = client.execute(httpGet);
        HttpEntity entity = response.getEntity();
        InputStream stream = entity.getContent();
        int b;
        while ((b = stream.read()) != -1) {
            stringBuilder.append((char) b);
        }
    } catch (ClientProtocolException e) {
    } catch (IOException e) {
    }

    JSONObject jsonObject = new JSONObject();
    try {
        jsonObject = new JSONObject(stringBuilder.toString());
    } catch (JSONException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }



    Double lon = new Double(0);
    Double lat = new Double(0);

    try {

        lon = ((JSONArray)jsonObject.get("results")).getJSONObject(0)
            .getJSONObject("geometry").getJSONObject("location")
            .getDouble("lng");

        lat = ((JSONArray)jsonObject.get("results")).getJSONObject(0)
            .getJSONObject("geometry").getJSONObject("location")
            .getDouble("lat");

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








     point = new GeoPoint((int) (lat * 1E6), (int) (lon * 1E6));

     mapController.animateTo(point);
     mapController.setZoom(12);

     List<Overlay> mapOverlays = mapView.getOverlays();
     Drawable drawable = this.getResources().getDrawable(R.drawable.mark_green);
     AddItemizedOverlay itemizedOverlay = new AddItemizedOverlay(drawable, this);

     OverlayItem overlayitem = new OverlayItem(point, "Customer", addressToToast);

     itemizedOverlay.addOverlay(overlayitem);
     mapOverlays.add(itemizedOverlay);
     mapView.invalidate();

     Toast.makeText(this, "Lat: " + point.getLatitudeE6() +", Lon:  "+ point.getLongitudeE6() + "Address: " + addressToToast, Toast.LENGTH_LONG).show();

}
于 2012-12-27T13:45:50.250 回答