我写了以下代码来获取位置名称：
UseGpsActivity.java
public class UseGpsActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
/* Use the LocationManager class to obtain GPS locations */
boolean gps_is_enabled = false;
LocationManager mlocManager = (LocationManager) this
.getSystemService(Context.LOCATION_SERVICE);
List<String> accessibleProviders = mlocManager.getProviders(true);
gps_is_enabled = accessibleProviders != null
&& accessibleProviders.size() > 0;
Log.v("gps enabled", gps_is_enabled + "");
LocationListener mlocListener = new MyLocationListener();
// mlocManager.requestLocationUpdates(mlocManager.GPS_PROVIDER, 0, 0,
// mlocListener);
mlocManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0,
mlocListener);
// mlocManager.set
}
/* Class My Location Listener */
public class MyLocationListener implements LocationListener {
@Override
public void onProviderDisabled(String provider) {
Toast.makeText(getApplicationContext(), "Gps Disabled", 5000)
.show();
Log.v("gps", "gps disabled");
}
@Override
public void onProviderEnabled(String provider) {
Toast.makeText(getApplicationContext(), "Gps Enabled", 5000).show();
Log.v("gps", "gps enabled");
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public void onLocationChanged(Location loc) {
// TODO Auto-generated method stub
loc.getLatitude();
loc.getLongitude();
String Text = "My current location is: " + "Latitud = "
+ loc.getLatitude() + "Longitud = " + loc.getLongitude();
Toast.makeText(getApplicationContext(), Text, Toast.LENGTH_SHORT)
.show();
Geocoder gcd = new Geocoder(UseGpsActivity.this,
Locale.getDefault());
List<Address> addresses = null;
try {
addresses = gcd.getFromLocation(loc.getLatitude(),
loc.getLongitude(), 1);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if (addresses != null) {
if (addresses.size() > 0) {
Log.v("Addresses : ", addresses.get(0).getLocality() + "");
Toast.makeText(
getApplicationContext(),
"Addresses : " + addresses.get(0).getLocality()
+ "", Toast.LENGTH_LONG).show();
Log.v("gps", Text + " " + addresses.get(0).getLocality()
+ "");
}
} else {
Log.v("addresses ", "NULL");
}
}
}/* End of Class MyLocationListener */
Manifest.xml上的代码
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="demo.usegps"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="4" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_MOCK_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_GPS" />
<uses-permission android:name="android.permission.ACCESS_ASSISTED_GPS" />
<uses-permission android:name="android.permission.SET_TIME_ZONE" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:name=".UseGpsActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
当我使用geo fix（geo fix -122.084094 37.422006）时，我会用lat和lng显示toast，但是我在logcat上收到以下消息：
01-19 13:32:48.991: W/System.err(751): java.io.IOException: Service not Available
01-19 13:32:48.991: W/System.err(751): at android.location.Geocoder.getFromLocation(Geocoder.java:117)
01-19 13:32:49.001: W/System.err(751): at demo.usegps.UseGpsActivity$MyLocationListener.onLocationChanged(UseGpsActivity.java:74)
01-19 13:32:49.001: W/System.err(751): at android.location.LocationManager$ListenerTransport._handleMessage(LocationManager.java:191)
01-19 13:32:49.001: W/System.err(751): at android.location.LocationManager$ListenerTransport.access$000(LocationManager.java:124)
01-19 13:32:49.001: W/System.err(751): at android.location.LocationManager$ListenerTransport$1.handleMessage(LocationManager.java:140)
01-19 13:32:49.001: W/System.err(751): at android.os.Handler.dispatchMessage(Handler.java:99)
01-19 13:32:49.001: W/System.err(751): at android.os.Looper.loop(Looper.java:123)
01-19 13:32:49.001: W/System.err(751): at android.app.ActivityThread.main(ActivityThread.java:4627)
01-19 13:32:49.001: W/System.err(751): at java.lang.reflect.Method.invokeNative(Native Method)
01-19 13:32:49.001: W/System.err(751): at java.lang.reflect.Method.invoke(Method.java:521)
01-19 13:32:49.001: W/System.err(751): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
01-19 13:32:49.011: W/System.err(751): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
01-19 13:32:49.011: W/System.err(751): at dalvik.system.NativeStart.main(Native Method)
01-19 13:32:49.011: V/addresses(751): NULL
我需要在我的代码中添加或调用哪些服务？
答案 0 :(得分：0)
我使用了以下代码，现在我可以获得位置名称：
public class GPSLocatorActivity extends MapActivity {
private MapView mapView;
private MapController mapController;
private LocationManager locationManager;
private LocationListener locationListener;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
locationListener = new GPSLocationListener();
locationManager.requestLocationUpdates(
LocationManager.GPS_PROVIDER,
0,
0,
locationListener);
mapView = (MapView) findViewById(R.id.mapView);
// enable Street view by default
mapView.setStreetView(true);
// enable to show Satellite view
// mapView.setSatellite(true);
// enable to show Traffic on map
// mapView.setTraffic(true);
mapView.setBuiltInZoomControls(true);
mapController = mapView.getController();
mapController.setZoom(16);
}
@Override
protected boolean isRouteDisplayed() {
return false;
}
private class GPSLocationListener implements LocationListener
{
@Override
public void onLocationChanged(Location location) {
if (location != null) {
GeoPoint point = new GeoPoint(
(int) (location.getLatitude() * 1E6),
(int) (location.getLongitude() * 1E6));
/* Toast.makeText(getBaseContext(),
"Latitude: " + location.getLatitude() +
" Longitude: " + location.getLongitude(),
Toast.LENGTH_SHORT).show();*/
mapController.animateTo(point);
mapController.setZoom(16);
// add marker
MapOverlay mapOverlay = new MapOverlay();
mapOverlay.setPointToDraw(point);
List<Overlay> listOfOverlays = mapView.getOverlays();
listOfOverlays.clear();
listOfOverlays.add(mapOverlay);
String address = ConvertPointToLocation(point);
Toast.makeText(getBaseContext(), address, Toast.LENGTH_SHORT).show();
mapView.invalidate();
}
}
public String ConvertPointToLocation(GeoPoint point) {
String address = "";
Geocoder geoCoder = new Geocoder(
getBaseContext(), Locale.getDefault());
try {
List<Address> addresses = geoCoder.getFromLocation(
point.getLatitudeE6() / 1E6,
point.getLongitudeE6() / 1E6, 1);
if (addresses.size() > 0) {
for (int index = 0; index < addresses.get(0).getMaxAddressLineIndex(); index++)
address += addresses.get(0).getAddressLine(index) + " ";
}
}
catch (IOException e) {
e.printStackTrace();
}
return address;
}
@Override
public void onProviderDisabled(String provider) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
}
class MapOverlay extends Overlay
{
private GeoPoint pointToDraw;
public void setPointToDraw(GeoPoint point) {
pointToDraw = point;
}
public GeoPoint getPointToDraw() {
return pointToDraw;
}
@Override
public boolean draw(Canvas canvas, MapView mapView, boolean shadow, long when) {
super.draw(canvas, mapView, shadow);
// convert point to pixels
Point screenPts = new Point();
mapView.getProjection().toPixels(pointToDraw, screenPts);
// add marker
Bitmap bmp = BitmapFactory.decodeResource(getResources(), R.drawable.red);
canvas.drawBitmap(bmp, screenPts.x, screenPts.y - 24, null); // 24 is the height of image
return true;
}
}
}