Я использовал тост для отображения текста, обозначенного маркером.Вот как я решил это для демонстрационного проекта:
- начало Location.java -
package com.cb2enterprises.geocode;
import com.google.android.maps.GeoPoint;
public class Location
{
public GeoPoint Point;
public String Title;
public String Snippet;
public Location(GeoPoint point, String title, String snippet)
{
Point = point;
Title = title;
Snippet = snippet;
}
}
- конец -
- начало PushpinOverlay.java-
package com.cb2enterprises.geocode;
import android.content.Context;
import android.graphics.drawable.Drawable;
import android.widget.Toast;
import android.view.Gravity;
import com.google.android.maps.ItemizedOverlay;
import com.google.android.maps.OverlayItem;
import java.util.ArrayList;
import java.util.List;
public class PushpinOverlay extends ItemizedOverlay<OverlayItem>
{
private List<Location> mItems;
Context mContext = null;
public PushpinOverlay(Context context, Drawable marker)
{
super(boundCenterBottom(marker));
mContext = context;
}
public void setItems(ArrayList<Location> items)
{
mItems = items;
populate();
}
@Override
protected OverlayItem createItem(int i)
{
return new OverlayItem(mItems.get(i).Point, mItems.get(i).Title, mItems.get(i).Snippet);
}
@Override
public int size() {
return mItems.size();
}
@Override
protected boolean onTap(int i)
{
Toast msg = Toast.makeText(mContext, mItems.get(i).Title, Toast.LENGTH_LONG);
msg.setGravity(Gravity.CENTER, msg.getXOffset() / 2, msg.getYOffset() / 2);
msg.show();
return true;
}
}
- конец -
- начало GeoCodeDemoActivity.java -
package com.cb2enterprises.geocode;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.graphics.drawable.Drawable;
import android.location.Address;
import android.location.Geocoder;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapView;
import com.google.android.maps.MyLocationOverlay;
public class GeoCodeDemoActivity extends MapActivity
{
Geocoder geocoder = null;
MapView mapView = null;
ProgressDialog progDialog = null;
List<Address> addressList = null;
MyLocationOverlay curLocOverlay = null;
ArrayList<Location> locations = null;
PushpinOverlay pushpin = null;
@Override
protected boolean isLocationDisplayed()
{
return false;
}
@Override
protected boolean isRouteDisplayed()
{
return false;
}
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mapView = (MapView)findViewById(R.id.geoMap);
mapView.setBuiltInZoomControls(true);
locations = new ArrayList<Location>();
Drawable icon = getResources().getDrawable(R.drawable.pin);
pushpin = new PushpinOverlay(this, icon);
// put the current location as hockey puck
curLocOverlay = new MyLocationOverlay(this, mapView);
curLocOverlay.runOnFirstFix(new Runnable()
{
public void run()
{
mapView.getController().animateTo(curLocOverlay.getMyLocation());
}
});
mapView.getOverlays().add(curLocOverlay);
mapView.getController().setZoom(12);
Button geoBtn = (Button)findViewById(R.id.geocodeBtn);
geocoder = new Geocoder(this);
geoBtn.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View arg0)
{
EditText loc = (EditText)findViewById(R.id.location);
String locationName = loc.getText().toString();
progDialog = ProgressDialog.show(GeoCodeDemoActivity.this, "Processing",
"Finding location", true, false);
findLocation(locationName);
}
});
}
@Override
public void onResume()
{
super.onResume();
curLocOverlay.enableMyLocation();
}
@Override
public void onPause()
{
super.onPause();
curLocOverlay.disableMyLocation();
}
private void findLocation(final String locationName)
{
Thread thrd = new Thread()
{
public void run()
{
try
{
//do background work
addressList = geocoder.getFromLocationName(locationName, 5);
//send message to handler to process results
uiCallback.sendEmptyMessage(0);
}
catch (IOException e)
{
e.printStackTrace();
}
}
};
thrd.start();
}
//ui thread callback handler
private Handler uiCallback = new Handler()
{
@Override
public void handleMessage(Message msg)
{
progDialog.dismiss();
if(addressList != null && addressList.size() > 0)
{
int lat = (int)(addressList.get(0).getLatitude()*1E6);
int lng = (int)(addressList.get(0).getLongitude()*1E6);
GeoPoint pt = new GeoPoint(lat, lng);
locations.add(new Location(pt, addressList.get(0).getFeatureName(), addressList.get(0).getAddressLine(0)));
pushpin.setItems(locations);
mapView.getOverlays().add(pushpin);
mapView.getController().setCenter(locations.get(locations.size()-1).Point);
mapView.getController().setZoom(15);
}
else
{
Dialog foundNothingDlg = new AlertDialog.Builder(GeoCodeDemoActivity.this)
.setIcon(0)
.setTitle("Failed to find location")
.setPositiveButton("Ok", null)
.setMessage("Location not found...")
.create();
foundNothingDlg.show();
}
}
};
}