problems with android.location.geocoder

问题:

I know there has been a lot of questions on the site about the IOExeption : service not available.....I have checked all the answers i could find on the subject... i'm running it as async task which seems to be working fine but still getting the same exception.

I have used isPresent() on previous attempts although it is not in the following code and i am using the same phone. i have the internet permission. i have tried to change target to google api to see if that was the problem but it made no difference.

This is a vital part of a forth year project so any help would be serious. ps never worked with java or android before very recently so forgive any rookie looking coding ty..

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    view1 = (TextView) findViewById(R.id.textView1);
    view2 = (TextView)findViewById(R.id.textView2);
    view3 = (TextView)findViewById(R.id.textView4);
    b1 = (Button) findViewById(R.id.button1);

    locationManager =
            (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);

    //provider =
      //      locationManager.getProvider(LocationManager.GPS_PROVIDER);

    final LocationListener listener = new LocationListener() {

        @Override
        public void onLocationChanged(Location location) {
            view2.setText(Double.toString(location.getLatitude()));
            view3.setText(Double.toString(location.getLongitude()));
            Double lat = Double.valueOf(location.getLatitude());
            Double longTemp = Double.valueOf(location.getLatitude());
            new geo().execute(lat,longTemp);
            }

        @Override
        public void onProviderDisabled(String provider) {
            // TODO Auto-generated method stub

        }

        @Override
        public void onProviderEnabled(String provider) {
            // TODO Auto-generated method stub

        }

        @Override
        public void onStatusChanged(String provider, int status,
                Bundle extras) {
            // TODO Auto-generated method stub

        }

    };
    b1.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            locReqest();
        }

        private void locReqest() {
            locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 10000, 0, listener);
        }
    });

}

class geo extends AsyncTask<Double, Void, String>{
    Geocoder geocoder = new Geocoder(getApplicationContext(), Locale.getDefault());
    @Override
    protected String doInBackground(Double... params) {
           Address address = null;
           List<Address> addresses = null;
            try {
                // Call the synchronous getFromLocation() method by passing in the lat/long values.
                addresses = geocoder.getFromLocation(params[0].doubleValue(),params[1].doubleValue(), 1);
                address = addresses.get(0);
                if (address != null){
                    return "Got your address : " + address.getCountryName().toString();
                }
            } catch (IOException e) {
                e.printStackTrace();
                return "failed";
            }
            return"fail";
    }
    @Override
    protected void onPostExecute(String result) {
        // TODO Auto-generated method stub
        super.onPostExecute(result);
        //view1.setText(result);
        Toast.makeText(getApplicationContext(), "The address is: " + result, Toast.LENGTH_LONG).show();
    }


}

heres the logcat

12-16 23:06:53.855: W/System.err(23578): java.io.IOException: Service not Available
12-16 23:06:53.865: W/System.err(23578):    at android.location.Geocoder.getFromLocation(Geocoder.java:136)
12-16 23:06:53.865: W/System.err(23578):    at com.boggerTech.local.Main$geo.doInBackground(Main.java:102)
12-16 23:06:53.880: W/System.err(23578):    at com.boggerTech.local.Main$geo.doInBackground(Main.java:1)
12-16 23:06:53.900: W/System.err(23578):    at android.os.AsyncTask$2.call(AsyncTask.java:264)
12-16 23:06:53.900: W/System.err(23578):    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
12-16 23:06:53.905: W/System.err(23578):    at java.util.concurrent.FutureTask.run(FutureTask.java:137)
12-16 23:06:53.915: W/System.err(23578):    at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:208)
12-16 23:06:53.915: W/System.err(23578):    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
12-16 23:06:53.915: W/System.err(23578):    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
12-16 23:06:53.920: W/System.err(23578):    at java.lang.Thread.run(Thread.java:856)
12-16 23:07:10.440: W/System.err(23578): java.io.IOException: Service not Available

回答1:

Geocoder.isPresent() can return false on some devices.

If it returns true and you still have problems you can create your own Geocoder by using The Google Geocoding API

I made a platform-independent Geocoder library which is available at github and Maven Central

dependencies {
    compile 'com.github.doctoror.geocoder:library:[version]'
}

Edit: the previous answer contained a short example implementation of implementing Geocoder.