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我需要从纬度和经度获取邮政编码，我能够获取带有街道名称的地址但无法获取邮政编码。字符串 pCode 在以下代码中返回 Null。 下面是我正在使用的代码:
import java.io.IOException;
import java.util.List;
import java.util.Locale;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.ContentResolver;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.location.Address;
import android.location.Geocoder;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.provider.Settings;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ProgressBar;
import android.widget.Toast;
public class GetCurrentLocation extends Activity implements OnClickListener {
private LocationManager locationMangaer=null;
private LocationListener locationListener=null;
private Button btnGetLocation = null;
private EditText editLocation = null;
private ProgressBar pb =null;
private static final String TAG = "Debug";
private Boolean flag = false;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//if you want to lock screen for always Portrait mode
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
pb = (ProgressBar) findViewById(R.id.progressBar1);
pb.setVisibility(View.INVISIBLE);
editLocation = (EditText) findViewById(R.id.editTextLocation);
btnGetLocation = (Button) findViewById(R.id.btnLocation);
btnGetLocation.setOnClickListener(this);
locationMangaer = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
}
@Override
public void onClick(View v) {
flag = displayGpsStatus();
if (flag) {
Log.v(TAG, "onClick");
editLocation.setText("Please!! move your device to see the changes in coordinates."+"\nWait..");
pb.setVisibility(View.VISIBLE);
locationListener = new MyLocationListener();
locationMangaer.requestLocationUpdates(LocationManager.GPS_PROVIDER, 5000, 10,
locationListener);
} else {
alertbox("Gps Status!!", "Your GPS is: OFF");
}
}
/*----------Method to Check GPS is enable or disable ------------- */
private Boolean displayGpsStatus() {
ContentResolver contentResolver = getBaseContext().getContentResolver();
boolean gpsStatus = Settings.Secure.isLocationProviderEnabled(
contentResolver, LocationManager.GPS_PROVIDER);
if (gpsStatus) {
return true;
} else {
return false;
}
}
/*----------Method to create an AlertBox ------------- */
protected void alertbox(String title, String mymessage) {
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage("Your Device's GPS is Disable")
.setCancelable(false)
.setTitle("** Gps Status **")
.setPositiveButton("Gps On",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// finish the current activity
// AlertBoxAdvance.this.finish();
Intent myIntent = new Intent(
Settings.ACTION_SECURITY_SETTINGS);
startActivity(myIntent);
dialog.cancel();
}
})
.setNegativeButton("Cancel",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// cancel the dialog box
dialog.cancel();
}
});
AlertDialog alert = builder.create();
alert.show();
}
/*----------Listener class to get coordinates ------------- */
private class MyLocationListener implements LocationListener {
@Override
public void onLocationChanged(Location loc) {
editLocation.setText("");
pb.setVisibility(View.INVISIBLE);
Toast.makeText(getBaseContext(),"Location changed : Lat: " + loc.getLatitude()
+ " Lng: " + loc.getLongitude(),Toast.LENGTH_SHORT).show();
String longitude = "Longitude: " +loc.getLongitude();
Log.v(TAG, longitude);
String latitude = "Latitude: " +loc.getLatitude();
Log.v(TAG, latitude);
/*----------to get City-Name from coordinates ------------- */
String cityName=null;
String addrs = null;
String pCode = null;
Geocoder gcd = new Geocoder(getBaseContext(), Locale.getDefault());
List<Address> addresses;
try {
addresses = gcd.getFromLocation(loc.getLatitude(), loc.getLongitude(), 1);
if (addresses.size() > 0)
System.out.println(addresses.get(0).getLocality());
cityName=addresses.get(0).getLocality();
addrs = addresses.get(0).getAddressLine(0);
pCode = addresses.get(0).getPostalCode();
} catch (IOException e) {
e.printStackTrace();
}
String s = longitude+"\n"+latitude +"\n\nMy Currrent City is: "+cityName+" Address "+ addrs+
" Postal Code"+pCode;
editLocation.setText(s);
}
@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
}
}
}