在mapview中給出用戶定義的註釋

Question

我想在具有多個註釋的mapview上瀏覽我的城市，但我無法做到這一點。有誰建議我，我們如何在android中使用用戶定義的經度和緯度來做到這一點。我使用一個註釋創建了一個地圖視圖，但系統已定義，我必須從模擬器控制傳遞經度和緯度。我們如何使用具有多個註釋的代碼發送該代碼。

這裏是我的代碼：

package com.ex.maps; 

import java.util.List; 

import android.content.Context; 
import android.graphics.Bitmap; 
import android.graphics.BitmapFactory; 
import android.graphics.Canvas; 
import android.graphics.Paint; 
import android.graphics.Point; 
import android.location.Location; 
import android.location.LocationListener; 
import android.location.LocationManager; 
import android.os.Bundle; 
import android.util.Log; 
import android.view.ViewGroup; 
import android.view.ViewGroup.LayoutParams; 
import android.widget.Toast; 
import android.widget.ZoomControls; 

import com.google.android.maps.GeoPoint; 
import com.google.android.maps.MapActivity; 
import com.google.android.maps.MapController; 
import com.google.android.maps.MapView; 
import com.google.android.maps.Overlay; 

public class HelloGoogleMaps extends MapActivity implements LocationListener{ 
    MapController mc; 
    GeoPoint p; 
    double lat; 
    double lng; 
    @Override 


    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 
     MapView gMapView = (MapView) findViewById(R.id.mapview); 
     gMapView.setBuiltInZoomControls(true); 
     GeoPoint p = new GeoPoint((int) (lat * 1000000), (int) (lng * 1000000)); 
     gMapView.setSatellite(true); 
     mc = gMapView.getController(); 
     mc.setCenter(p); 
     mc.setZoom(14); 
     LocationManager lm = (LocationManager)getSystemService(Context.LOCATION_SERVICE); 
     LocationListener mlocListener = new HelloGoogleMaps(); 
     //lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0,mlocListener); 
     lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 1000L, 500.0f, this); 
     ZoomControls zoomControls = (ZoomControls) gMapView.getZoomControls(); 

     zoomControls.setLayoutParams(new ViewGroup.LayoutParams(LayoutParams.WRAP_CONTENT, 

     LayoutParams.WRAP_CONTENT)); 

     gMapView.addView(zoomControls); 

     gMapView.displayZoomControls(true); 
     MyLocationOverlay myLocationOverlay = new MyLocationOverlay(); 

     List<Overlay> list = gMapView.getOverlays(); 

     list.add(myLocationOverlay); 
    /*List<Overlay> mapOverlays = gMapView.getOverlays(); 
    Drawable drawable = this.getResources().getDrawable(R.drawable.arrow_icon); 
    HelloItemizedOverlay itemizedoverlay = new HelloItemizedOverlay(drawable); 
    //GeoPoint p = new GeoPoint((int) (lat * 1000000), (int) (lng * 1000000)); 
    OverlayItem overlayitem = new OverlayItem(point, "Hola, Mundo!", "I'm in Mexico City!"); 
    itemizedoverlay.addOverlay(overlayitem); 
    mapOverlays.add(itemizedoverlay);*/ 
    } 

    public void onLocationChanged(Location location) { 
     if (location != null) { 
      lat = location.getLatitude(); 
      lng = location.getLongitude(); 
      p = new GeoPoint((int) (lat * 1000000), (int) (lng * 1000000)); 
      mc.animateTo(p); 
      //Log.d("LOCATION CHANGED", location.getLatitude() + ""); 
      //Log.d("LOCATION CHANGED", location.getLongitude() + "");*/ 
      Toast.makeText(HelloGoogleMaps.this, 
       location.getLatitude() + "" + location.getLongitude(), 
       Toast.LENGTH_LONG).show(); 
      } 
     } 
     //makeUseOfNewLocation(location); 



    public void onProviderDisabled(String provider) { 
    } 
    public void onProviderEnabled(String provider) { 
    } 
    public void onStatusChanged(String provider, int status, Bundle extras) { 
    } 
    protected boolean isRouteDisplayed() { 
    return true; 
    } 
    class MyLocationOverlay extends com.google.android.maps.Overlay { 
     @Override 

     public boolean draw(Canvas canvas, MapView mapView, boolean shadow, long when) { 

     super.draw(canvas, mapView, shadow); 
     Paint paint = new Paint(); 
     // Converts lat/lng-Point to OUR coordinates on the screen. 
     Point myScreenCoords = new Point(); 
     mapView.getProjection().toPixels(p, myScreenCoords); 
     paint.setStrokeWidth(1); 
     paint.setARGB(255, 255, 255, 255); 
     paint.setStyle(Paint.Style.STROKE); 
     Bitmap bmp = BitmapFactory.decodeResource(getResources(), R.drawable.icon); 
     canvas.drawBitmap(bmp, myScreenCoords.x, myScreenCoords.y, paint); 
     canvas.drawText("Here I am...", myScreenCoords.x, myScreenCoords.y, paint); 
     return true; 

     } } 
} 

Answer 1

public void onCreate(Bundle savedInstanceState) { 
       super.onCreate(savedInstanceState); 
       setContentView(R.layout.favmapview); 
       listbtn = (Button)findViewById(R.id.button1); 
       mapbtn = (Button)findViewById(R.id.button2); 
       TextView tv = (TextView)findViewById(R.id.tvmap); 
       bundle = getIntent().getExtras(); 
       str1= bundle.getString("key"); 
       lat = bundle.getStringArrayList("lat"); 
       log=bundle.getStringArrayList("log"); 
       location = bundle.getStringArrayList("location"); 
       tv.setText(str1); 


       listbtn.setOnClickListener(new View.OnClickListener() { 

       public void onClick(View v) { 

        // TODO Auto-generated method stub 
        OpenListView();  // Function called to display list view 


         } 
        }); 
       initialiseMapView(); 
      } 
    // Navigates to listView class and displays listView  
      protected void OpenListView() { 

       final ProgressDialog dialog = ProgressDialog.show(FavMapView.this, "HIV ATLAS", 

          "Please wait...", true); 
       final Handler handler = new Handler() { 

        public void handleMessage(Message msg) { 

           dialog.dismiss(); 
           } 
          }; 

       Thread checkUpdate = new Thread() { 

        public void run() { 
         Intent intent = new Intent(FavMapView.this,Favorites.class); 
         intent.putExtra("key", bundle.getString("key")); 
         startActivity(intent); 
         dialog.dismiss(); 
         handler.sendEmptyMessage(0); 

        } 
       }; 
       checkUpdate.start(); 
      } 

    //============End  

      @Override 
      public boolean isRouteDisplayed() { 
       return true; 
      } 
      //Generates Map View 
      private void initialiseMapView() { 

       mapView = (MapView) findViewById(R.id.mapview); 
       mapController = mapView.getController(); 
       mapView.setBuiltInZoomControls(true); 
       mapView.setSatellite(false); 

       GeoPoint startPoint = new GeoPoint((int)(40.7575 * 1E6), (int)(-73.9785 * 1E6)); 
       mapController.setCenter(startPoint); 

      } 
      //===============End 
      @Override 
      public void onStart() { 
       super.onStart(); 
       initialiseOverlays(); 
      } 
     // Sets Geo points on Map View 
      private void initialiseOverlays() { 
       try { 
       // Create an ItemizedOverlay to display a list of markers 
        Drawable defaultMarker = getResources().getDrawable(R.drawable.marker); 
        placesItemizedOverlay = new HelloItemizedOverlay (FavMapView.this, defaultMarker); 
        for(int i=0;i<log.size();i++) 
        { 
         double lat1 = Double.parseDouble(lat.get(i)); 
         double log1 =Double.parseDouble(log.get(i)); 
         placesItemizedOverlay.addOverlayItem(new OverlayItem(new GeoPoint((int)(lat1 * 1E6), 
           (int) (log1 * 1E6)),location.get(i),null)); 
        } 

//==============================End 
       // Add the overlays to the map 
        mapView.getOverlays().add(placesItemizedOverlay); 
      } catch (NumberFormatException e) { 
       Toast.makeText(getApplicationContext(), "No Jobs available", 
         Toast.LENGTH_SHORT).show(); 
       // TODO Auto-generated catch block 
       e.printStackTrace(); 
      } catch (NotFoundException e) { 
       Toast.makeText(getApplicationContext(), "No Jobs available", 
         Toast.LENGTH_SHORT).show(); 
       // TODO Auto-generated catch block 
       e.printStackTrace(); 
      } 
      } 

    }