我想在带有多个注释的mapview上探索我的城市，但我无法做到这一点。是否有人建议我如何在用户定义的经度和纬度的android中做到这一点。我创建了一个带有一个注释的地图视图，但是在系统定义的情况下，我必须从模拟器控件传递经度和纬度。我们如何使用带有多个注释的代码发送它。
这是我的代码：
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;
} }
}
答案 0 :(得分：2)
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();
}
}
}