将地理编码器与 myLocationOverlay 结合使用

发布于 2024-11-04 22:34:59 字数 3327 浏览 5 评论 0原文

我尝试从 MyLocationOverlay 提供的经度和纬度获取当前的邮政编码,并将其设置为我的 Activity 上的 EditView。

当我尝试从 MyLocationOverlay 获取经度和纬度时,活动崩溃。

这段代码有什么问题吗?

问候, 浮动

LogCat 输出: http://codepaste.net/vs6itk 第 59 行是以下行:

 double currentLatitude = myLocationOverlay.getMyLocation().getLatitudeE6(); 

这是我的代码:

protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.partner_suche);

    final EditText tView = (EditText) findViewById(R.id.editTextPLZ);
    final MapView mView = (MapView) findViewById(R.id.mapview);
    mView.getController().setZoom(14);

    List<Overlay> mapOverlays = mView.getOverlays();

    myLocationOverlay = new MyCustomLocationOverlay(this, mView);
    mapOverlays.add(myLocationOverlay);
    myLocationOverlay.enableMyLocation();
    myLocationOverlay.enableCompass();
    myLocationOverlay.runOnFirstFix(new Runnable() {
        public void run() {
            mView.getController().animateTo(myLocationOverlay.getMyLocation());
        }
    });

    Geocoder gc = new Geocoder(this, Locale.getDefault());
    double currentLatitude = myLocationOverlay.getMyLocation().getLatitudeE6();
    double currentLongitute = myLocationOverlay.getMyLocation().getLongitudeE6();

    try 
    {
        List<Address> addresses = gc.getFromLocation(currentLatitude, currentLongitute, 1);
        if (addresses.size() > 0) 
        {
            tView.setText(addresses.get(0).getLocality());
        }
    } catch (IOException e) 
    {

    }
}

编辑: 我创建了一个 LocationListener 来获取我当前的位置。现在,我尝试运行 gc.getFromLocation(latitude, longitude, 1); 的地方崩溃了。我无法读取异常? :/

LocationManager locationManager;
    String context = Context.LOCATION_SERVICE;
    locationManager = (LocationManager)getSystemService(context);
    String provider = LocationManager.GPS_PROVIDER;

    LocationListener locationListener = new LocationListener() {
        public void onLocationChanged(Location location) {
            updateWithNewLocation(location);
            } 

        public void onProviderDisabled(String provider){
            updateWithNewLocation(null);
            }
        public void onProviderEnabled(String provider){ }
        public void onStatusChanged(String provider, int status,Bundle extras){ }
        };

    locationManager.requestLocationUpdates(provider, 0, 0, locationListener);

private void updateWithNewLocation(Location location) {
    final EditText tView = (EditText) findViewById(R.id.editTextPLZ);
    double latitude = location.getLatitude();
    double longitude = location.getLongitude();

    Geocoder gc = new Geocoder(this, Locale.getDefault());
    if (location != null) {
        try 
        {
            List<Address> addresses = gc.getFromLocation(latitude, longitude, 1);
            if (addresses.size() > 0) 
            {
                Address address = addresses.get(0);
                for (int i = 0; i < address.getMaxAddressLineIndex(); i++){
                    tView.setText(address.getPostalCode());
                }
            }
        } catch (Exception e) 
        {

        }
    }

}

i try to get the current zip code from the longitude and latitude which MyLocationOverlay delivers and set this to a EditView on my Activity.

The Activity crashs when i try to get the longitude and latitude from MyLocationOverlay.

Whats wrong with this code?

Regards,
float

LogCat output: http://codepaste.net/vs6itk
Line 59 is the following line:

 double currentLatitude = myLocationOverlay.getMyLocation().getLatitudeE6(); 

Here is my Code:

protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.partner_suche);

    final EditText tView = (EditText) findViewById(R.id.editTextPLZ);
    final MapView mView = (MapView) findViewById(R.id.mapview);
    mView.getController().setZoom(14);

    List<Overlay> mapOverlays = mView.getOverlays();

    myLocationOverlay = new MyCustomLocationOverlay(this, mView);
    mapOverlays.add(myLocationOverlay);
    myLocationOverlay.enableMyLocation();
    myLocationOverlay.enableCompass();
    myLocationOverlay.runOnFirstFix(new Runnable() {
        public void run() {
            mView.getController().animateTo(myLocationOverlay.getMyLocation());
        }
    });

    Geocoder gc = new Geocoder(this, Locale.getDefault());
    double currentLatitude = myLocationOverlay.getMyLocation().getLatitudeE6();
    double currentLongitute = myLocationOverlay.getMyLocation().getLongitudeE6();

    try 
    {
        List<Address> addresses = gc.getFromLocation(currentLatitude, currentLongitute, 1);
        if (addresses.size() > 0) 
        {
            tView.setText(addresses.get(0).getLocality());
        }
    } catch (IOException e) 
    {

    }
}

EDIT:
I created a LocationListener to get my current location. Now the part crashes where i try to run gc.getFromLocation(latitude, longitude, 1); I can't read the Exception? :/

LocationManager locationManager;
    String context = Context.LOCATION_SERVICE;
    locationManager = (LocationManager)getSystemService(context);
    String provider = LocationManager.GPS_PROVIDER;

    LocationListener locationListener = new LocationListener() {
        public void onLocationChanged(Location location) {
            updateWithNewLocation(location);
            } 

        public void onProviderDisabled(String provider){
            updateWithNewLocation(null);
            }
        public void onProviderEnabled(String provider){ }
        public void onStatusChanged(String provider, int status,Bundle extras){ }
        };

    locationManager.requestLocationUpdates(provider, 0, 0, locationListener);

private void updateWithNewLocation(Location location) {
    final EditText tView = (EditText) findViewById(R.id.editTextPLZ);
    double latitude = location.getLatitude();
    double longitude = location.getLongitude();

    Geocoder gc = new Geocoder(this, Locale.getDefault());
    if (location != null) {
        try 
        {
            List<Address> addresses = gc.getFromLocation(latitude, longitude, 1);
            if (addresses.size() > 0) 
            {
                Address address = addresses.get(0);
                for (int i = 0; i < address.getMaxAddressLineIndex(); i++){
                    tView.setText(address.getPostalCode());
                }
            }
        } catch (Exception e) 
        {

        }
    }

}

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评论(2

恍梦境° 2024-11-11 22:34:59

如果您使用的是模拟器 API 级别 8 或 9,并收到异常:

java.io.IOException:服务不可用

,那么这是一个已知错误,请参阅 服务不可用

但它在真实设备和模拟器级别 7 上运行正常。 (您可能也应该在地址为空的情况下设置陷阱,尽管这不会使地理编码器工作!)

If you are using an emulator API level 8 or 9, and getting the exception:

java.io.IOException: Service not Available

then it is a known bug, see service not available

It works OK on real devices and emulator level 7 though. ( You should probably put a trap on addresses being null too, though this won't make the geocoder work!)

瞎闹 2024-11-11 22:34:59

返回的位置很可能

myLocationOverlay.getMyLocation()

从or

Location location = locationManager.getLastKnownLocation(provider);

为 NULL。可能是由于您的应用程序尚未收到位置修复,并且没有以前保存的位置。

尝试将进行地理编码的代码块移动到收到修复后运行的可运行程序中。像这样:

myLocationOverlay.runOnFirstFix(new Runnable() {
    public void run() {
        Location loc = myLocationOverlay.getMyLocation();
        if (loc != null) {
            mView.getController().animateTo(loc);
            Geocoder gc = new Geocoder(this, Locale.getDefault());
            double currentLatitude = loc.getLatitudeE6();
            double currentLongitute = loc.getLongitudeE6();

            try 
            {
                List<Address> addresses = gc.getFromLocation(currentLatitude, currentLongitute, 1);
                if (addresses.size() > 0) 
                {
                    tView.setText(addresses.get(0).getLocality());
                }
            } catch (IOException e) 
            {

            }
        }
    }
});

Most likely the location being returned from

myLocationOverlay.getMyLocation()

or

Location location = locationManager.getLastKnownLocation(provider);

is NULL. Likely due to your application not yet having received a location fix, and having no previously saved locations.

Try moving the code block where you do the geocoding into your runnable that runs after receiving a fix. Like this:

myLocationOverlay.runOnFirstFix(new Runnable() {
    public void run() {
        Location loc = myLocationOverlay.getMyLocation();
        if (loc != null) {
            mView.getController().animateTo(loc);
            Geocoder gc = new Geocoder(this, Locale.getDefault());
            double currentLatitude = loc.getLatitudeE6();
            double currentLongitute = loc.getLongitudeE6();

            try 
            {
                List<Address> addresses = gc.getFromLocation(currentLatitude, currentLongitute, 1);
                if (addresses.size() > 0) 
                {
                    tView.setText(addresses.get(0).getLocality());
                }
            } catch (IOException e) 
            {

            }
        }
    }
});
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