这是一个地理定位应用程序。它工作成功,但总是做一个循环,不断显示吐司…下面是代码:
package com.application.geocoding;
import java.io.IOException;
import java.util.List;
import java.util.Locale;
import android.app.Activity;
import android.os.Bundle;
import android.content.Context;
import android.location.Address;
import android.location.Geocoder;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.widget.TextView;
import android.widget.Toast;
public class main extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
geoLocation();
}
public void geoLocation()
{
LocationManager locationManager =(LocationManager)getSystemService(Context.LOCATION_SERVICE);
LocationListener locationListener = new LocationListener() {
public void onLocationChanged(Location location) {
// Called when a new location is found by the network location provider.
//makeUseOfNewLocation(location);
updateWithNewLocation(location);
}
public void onStatusChanged(String provider, int status, Bundle extras) {}
public void onProviderEnabled(String provider) {
Toast.makeText(main.this,"Network Enabled",Toast.LENGTH_SHORT ).show();
}
public void onProviderDisabled(String provider) {
Toast.makeText(main.this,"Network Disabled",Toast.LENGTH_SHORT ).show();
}
};
// Register the listener with the Location Manager to receive location updates
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListener);
}
public void updateWithNewLocation(Location location) {
String latLongString,addressString = "Location not found";
TextView myLocationText,myLocationText2;
myLocationText=(TextView)findViewById(R.id.textView1);
myLocationText2=(TextView)findViewById(R.id.textView2);
if (location != null) {
double lat = location.getLatitude();
double lng = location.getLongitude();
Geocoder gc = new Geocoder(this, Locale.getDefault());
try {
List<Address> addresses = gc.getFromLocation(lat, lng, 1);
StringBuilder sb = new StringBuilder();
if (addresses.size() > 0) {
Address address = addresses.get(0);
for (int i = 0; i < address.getMaxAddressLineIndex(); i++)
sb.append(address.getAddressLine(i)).append("n");
sb.append(address.getLocality()).append("n");
//sb.append(address.getPostalCode()).append("n");
sb.append(address.getCountryName());
}
addressString = sb.toString();
} catch (IOException e) {}
latLongString = "Lat:" + lat + "nLong:" + lng;
} else {
latLongString = "No location found";
}
//myLocationText.setText("Your Current Position is:n" +
//latLongString);
//myLocationText2.setText(addressString);
Toast.makeText(this, latLongString, 1).show();
Toast.makeText(this, addressString, 1).show();
}
}
有人知道我应该把这个放在哪里吗?
locationManager.removeUpdates(locationListener);
所以它将只运行一次??谢谢. .
你可以把
locationManager.removeUpdates(locationListener);
locationManager = null;
您需要将其放入Override onLocationChanged(Location)
@Override
public void onLocationChanged(Location location) {
locationManager.removeUpdates(locationListener);
}
这将停止接收位置更新一旦你得到第一个GPS修复