我正在创建一个应用程序，其中我有一个导航屏幕，用户可以在多个位置提供。 这些位置存储在数组字符串中。 我在地图类中使用该字符串，我想用标记显示地图上的位置。 仅显示存储在阵列中的最后一个位置。 请有人帮帮我。
我的导航课程
public class Navigatie extends Activity{
public static String plaats1;
public static String plaats2;
public GeoPoint p;
public static String[] plaats;
public int i = 0;
static final String[] COUNTRIES = new String[]
{
"Antwerpen", "Aalst", "Aartselaar", "Brussel", "Charleroi","duinkerke", "Gent", "Hasselt", "Ieper", ""
};
// Here we create the layout, everything that's needed on the form is loaded in here.
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.navigatie);
// Create an instance of the AutoCompleteTextView which is created in the layout file
AutoCompleteTextView textView=(AutoCompleteTextView)findViewById(R.id.autocomplete);
// Create an ArrayAdapter which we are using to autocomplete the textview
ArrayAdapter<String>adapter=new ArrayAdapter<String>(this,R.layout.item_list,COUNTRIES);
// put the adapter created above in the AutoCompleteTextView
textView.setAdapter(adapter);
// We create a new ImageButton which links to the map.java class
ImageButton imageButton = (ImageButton) findViewById(R.id.imageButton1);
// We give a onclicklistener method to the button imageButton
imageButton.setOnClickListener(new OnClickListener() {
// if the imageButton is clicked we start a new activity called "Map"
public void onClick(View v) {
/*
for (int j = 0; j<plaats.length; j++)
{
Map.plaats[j] = plaats[j];
}
*/
startActivity(new Intent(Navigatie.this, Map.class));
}
});
Button add = (Button)findViewById(R.id.toevoegen);
add.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
EditText text1 = (EditText)findViewById(R.id.autocomplete);
plaats1 = text1.getText().toString();
if (plaats1 != "")
{
EditText text2 = (EditText)findViewById(R.id.editText1);
text2.append(plaats1 + "\n");
plaats = new String[20];
plaats[i] = plaats1;
Toast.makeText(Navigatie.this, plaats[i], Toast.LENGTH_SHORT).show();
i++;
text1.setText("");
}
}
});
Button clear = (Button)findViewById(R.id.verwijderen);
clear.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
EditText text2 = (EditText)findViewById(R.id.editText1);
text2.setText("");
Arrays.fill(plaats, null);
}
});
}
}
我的地图课程：
public class Map extends MapActivity {
private MapView mapView;
private MapController mc;
LocationManager locMgr;
MyLocationListener locLstnr;
private TextView tvlat;
private TextView tvlong;
public Navigatie nav;
public String locatie;
public int coordinates[] = new int[100];
public int counter = 0;
int gplat;
int gplon;
static final String[] COUNTRIES = new String[]
{
"Antwerpen", "Aalst", "Aartselaar", "Brussel", "Charleroi","duinkerke", "Gent", "Hasselt", "Ieper", ""
};
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
// set the layout screen to map
setContentView(R.layout.map);
// Create an instance of the AutoCompleteTextView which is created in the layout file
AutoCompleteTextView textView=(AutoCompleteTextView)findViewById(R.id.autocomplete_country);
// Create an ArrayAdapter which we are using to autocomplete the textview
ArrayAdapter<String>adapter=new ArrayAdapter<String>(this,R.layout.item_list,COUNTRIES);
// put the adapter created above in the AutoCompleteTextView
textView.setAdapter(adapter);
// Setting the mapview1 to the instance of MapView
mapView = (MapView) findViewById(R.id.mapview1);
// giving a controller to mc
mc = mapView.getController();
// String location2 = Navigatie.getVariable();
for (int i = 0; i<Navigatie.plaats.length; i++)
{
if(Navigatie.plaats[i]!=null && !Navigatie.plaats[i].equals(""))
{
FindLocation(Navigatie.plaats[i]);
}
else
{
System.out.println("Locatie niet gevonden");
}
}
// create an instance of the find button created in the layout file
Button btn_find = (Button) findViewById(R.id.btn_find);
// Defining button click event listener for the find button
OnClickListener findClickListener = new OnClickListener()
{
public void onClick(View v)
{
// Getting reference to EditText to get the user input location
EditText etLocation = (EditText) findViewById(R.id.autocomplete_country);
// Getting user input location
String location = etLocation.getText().toString();
if(location!=null && !location.equals(""))
{
Toast.makeText(Map.this, "Inzoomend op " + location, Toast.LENGTH_SHORT).show();
new GeocoderTask().execute(location);
}
else
{
Toast.makeText(Map.this, "Locatie niet gevonden", Toast.LENGTH_SHORT).show();
}
}
};
// Setting button click event listener for the find button
btn_find.setOnClickListener(findClickListener);
// redraws the map
mapView.invalidate();
// sets the built in zoomcontrols on the screen
mapView.setBuiltInZoomControls(true);
Drawable makerDefault = this.getResources().getDrawable(R.drawable.pushpin);
MirItemizedOverlay itemizedOverlay = new MirItemizedOverlay(makerDefault);
GeoPoint point = null;
for (int i = 0; i<100; i++)
{
point = new GeoPoint(coordinates[i], coordinates[i+1]);
OverlayItem overlayItem = new OverlayItem(point, "new place added", null);
itemizedOverlay.addOverlayItem(overlayItem);
i++;
}
mapView.getOverlays().add(itemizedOverlay);
MapController mc = mapView.getController();
mc.setCenter(point);
/*
String provider = LocationManager.GPS_PROVIDER;
locMgr = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
locLstnr = new MyLocationListener();
locMgr.requestSingleUpdate(provider, null);
*/
List<Overlay> mapOverlays = mapView.getOverlays();
Projection projection = mapView.getProjection();
}
// when the form is created we put in the menu from the resources menu.
@Override
public boolean onCreateOptionsMenu(Menu menu)
{
// we get the menu called main from the resources menu
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
// we set the options for the menu parts
@Override
public boolean onOptionsItemSelected(MenuItem item)
{
switch (item.getItemId())
{
// if my location is touched, this code is executed
case R.id.my_location:
// creates a toast that displays "moving to current location"
Toast.makeText(Map.this, "Moving To Current location", Toast.LENGTH_SHORT).show();
String provider = LocationManager.GPS_PROVIDER;
locMgr = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
locLstnr = new MyLocationListener();
locMgr.requestSingleUpdate(provider, null);
// locLstnr.gpsCurrentLocation();
return true;
// if normal view is touched, this code is executed
case R.id.normalview:
// creates a toast that displays "Map Normal Street View"
Toast.makeText(Map.this, "Map Normal Street View", Toast.LENGTH_SHORT).show();
// if the satellite view is enabled, we disable the satellite view so the normal view popups again
if(mapView.isSatellite()==true){
mapView.setSatellite(false);
}
return true;
case R.id.satellite:
// creates a toast that displays "Map Satellite view"
Toast.makeText(Map.this, "Map Satellite View", Toast.LENGTH_SHORT).show();
// if the satellite view is disabled we enable the satellite view
if(mapView.isSatellite()==false){
mapView.setSatellite(true);
}
}
return true;
}
@Override
protected boolean isRouteDisplayed()
{
// TODO Auto-generated method stub
return true;
}
public class MyLocationListener implements LocationListener
{
public void onLocationChanged(Location loc)
{
loc.getLatitude();
loc.getLongitude();
String Text = "My current location is: " +
"Latitud = " + loc.getLatitude() +
"Longitud = " + loc.getLongitude();
Toast.makeText( getApplicationContext(), Text, Toast.LENGTH_SHORT).show();
String coordinates[] = {""+loc.getLatitude(), ""+loc.getLongitude()};
double lat = Double.parseDouble(coordinates[0]);
double lng = Double.parseDouble(coordinates[1]);
GeoPoint p = new GeoPoint(
(int) (lat * 1E6),
(int) (lng * 1E6));
mc.animateTo(p);
mc.setZoom(7);
mapView.invalidate();
}
public void onProviderDisabled(String provider)
{
Toast.makeText( getApplicationContext(),
"Gps Disabled",
Toast.LENGTH_SHORT ).show();
}
public void onProviderEnabled(String provider)
{
Toast.makeText( getApplicationContext(),
"Gps Enabled",
Toast.LENGTH_SHORT).show();
}
public void onStatusChanged(String provider, int status, Bundle extras)
{
}
}
// My overlay Class starts
class MyMapOverlays extends com.google.android.maps.Overlay
{
GeoPoint location = null;
public MyMapOverlays(GeoPoint location)
{
super();
this.location = location;
}
@Override
public void draw(Canvas canvas, MapView mapView, boolean shadow)
{
super.draw(canvas, mapView, shadow);
// translate the screen pixels
Point screenPoint = new Point();
mapView.getProjection().toPixels(this.location, screenPoint);
//add the image
canvas.drawBitmap(BitmapFactory.decodeResource(getResources(), R.drawable.pushpin),
screenPoint.x, screenPoint.y , null); //Setting the image location on the screen (x,y).
}
}
// My overlay Class ends
private class MirItemizedOverlay extends ItemizedOverlay
{
private List<OverlayItem> mOverlays = new ArrayList<OverlayItem>();
public MirItemizedOverlay(Drawable defaultMarker)
{
super(boundCenterBottom(defaultMarker));
}
@Override
protected OverlayItem createItem(int i)
{
return mOverlays.get(i);
}
@Override
public int size()
{
return mOverlays.size();
}
public void addOverlayItem(OverlayItem overlayItem)
{
mOverlays.add(overlayItem);
populate();
}
public void addOverlayItem(int lat, int lon, String title)
{
GeoPoint point = new GeoPoint(lat, lon);
OverlayItem overlayItem = new OverlayItem(point, title, null);
addOverlayItem(overlayItem);
}
/*
@Override
public boolean onTouchEvent(MotionEvent event, MapView mapView)
{
//---when user lifts his finger---
if (event.getAction() == 1)
{
GeoPoint p = mapView.getProjection().fromPixels(
(int) event.getX(),
(int) event.getY());
Toast.makeText(getBaseContext(),
p.getLatitudeE6() / 1E6 + "," +
p.getLongitudeE6() /1E6 ,
Toast.LENGTH_SHORT).show();
Geocoder geoCoder = new Geocoder(getBaseContext(), Locale.getDefault());
try
{
List<Address> addresses = geoCoder.getFromLocation(p.getLatitudeE6() / 1E6, p.getLongitudeE6() / 1E6, 1);
String strCompleteAddress= "";
if (addresses.size() > 0)
{
for (int i=0; i<addresses.get(0).getMaxAddressLineIndex();i++)
strCompleteAddress+= addresses.get(0).getAddressLine(i) + "\n";
}
Log.i("MyLocTAG => ", strCompleteAddress);
Toast.makeText(getBaseContext(), strCompleteAddress, Toast.LENGTH_LONG).show();
}
catch (IOException e)
{
Log.i("MyLocTAG => ", "this is the exception part");
e.printStackTrace();
}
return true;
}
else
return false;
}*/
}
//An AsyncTask class for accessing the GeoCoding Web Service
private class GeocoderTask extends AsyncTask<String, Void, List<Address>>
{
protected List<Address> doInBackground(String... locationName)
{
// Creating an instance of Geocoder class
Geocoder geocoder = new Geocoder(getBaseContext());
List<Address> addresses = null;
try {
//Getting a maximum of 3 Address that matches the input text
addresses = geocoder.getFromLocationName(locationName[0], 3);
}
catch (IOException e) {
e.printStackTrace();
}
return addresses;
}
protected void onPostExecute(List<Address> addresses)
{
//Getting Reference to MapView of the layout activity_main
MapView mapView = (MapView) findViewById(R.id.mapview1);
// Setting ZoomControls
mapView.setBuiltInZoomControls(true);
// Getting MapController for the MapView
MapController mc = mapView.getController();
// Getting Drawable object corresponding to a resource image
Drawable drawable = getResources().getDrawable(R.drawable.pushpin);
// Getting Overlays of the map
List<Overlay> overlays = mapView.getOverlays();
// Creating an ItemizedOverlay
LocationOverlay locationOverlay = new LocationOverlay(drawable,getBaseContext());
// Clearing the overlays
overlays.clear();
if(addresses==null || addresses.size()==0)
{
Toast.makeText(getBaseContext(), "No Location found", Toast.LENGTH_SHORT).show();
// Redraws the map to clear the overlays
mapView.invalidate();
}
// Adding Markers on Google Map for each matching address
for(int i=0;i<addresses.size();i++)
{
Address address = (Address) addresses.get(i);
// Creating an instance of GeoPoint, to display in Google Map
GeoPoint p = new GeoPoint((int)(address.getLatitude()*1E6), (int)(address.getLongitude()*1E6));
String addressText = String.format("%s, %s",
address.getMaxAddressLineIndex() > 0 ? address.getAddressLine(0) : "",
address.getCountryName());
// Creating an OverlayItem to mark the point
OverlayItem overlayItem = new OverlayItem(p, "Location",addressText);
// Adding the OverlayItem in the LocationOverlay
locationOverlay.addOverlay(overlayItem);
// Adding locationOverlay to the overlay
overlays.add(locationOverlay);
// Locate the first location
if(i==0)
mc.animateTo(p);
mc.setZoom(15);
}
// Redraws the map
mapView.invalidate();
}
}
public void FindLocation(String plaats)
{
Geocoder geoCoder = new Geocoder(this, Locale.getDefault());
try {
List<Address> addresses = geoCoder.getFromLocationName(
plaats, 5);
//String add = "";
if (addresses.size() > 0) {
coordinates[counter] = (int) (addresses.get(0).getLatitude() * 1E6);
counter++;
coordinates[counter] = (int) (addresses.get(0).getLongitude() * 1E6);
counter++;
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
答案 0 :(得分：0)
一些提示：
在FindLocation上添加一个else以捕获未找到的位置：
public void FindLocation（String plaats）{
Geocoder geoCoder = new Geocoder(this, Locale.getDefault());
try {
List<Address> addresses = geoCoder.getFromLocationName(
plaats, 5);
//String add = "";
if (addresses.size() > 0) {
coordinates[counter] = (int) (addresses.get(0).getLatitude() * 1E6);
counter++;
coordinates[counter] = (int) (addresses.get(0).getLongitude() * 1E6);
counter++;
} else {
Log.v(TAG, "Site " + plaats + " not found!");
}
} catch (IOException e) {
e.printStackTrace();
}
}
同样在onCreate（）循环已定义的位置，而不是整个数组：
for (int i = 0; i<count; i+=2)
{
point = new GeoPoint(coordinates[i], coordinates[i+1]);
OverlayItem overlayItem = new OverlayItem(point, "new place added", null);
itemizedOverlay.addOverlayItem(overlayItem);
}