我正在做一个尝试使用地理编码器打印用户给定坐标的当前位置的活动，但是每当它调用 getFromLocation 时它就会崩溃。我没有把地图键放在任何地方。我想知道这是否是程序崩溃的主要原因。我尝试了各种版本的模拟器，但它在任何地方都以相同的功能崩溃。如果需要密钥，我应该把它放在哪里以及如何？除了 INTERNET 和 ACCESS_FINE_LOCATION 之外，是否还有其他权限才能正常工作。这是代码：
package com.mapsgps.test;
import java.io.IOException;
import java.util.List;
import java.util.Locale;
//import com.mapsgps.test.googleGod;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.location.Address;
import android.location.Criteria;
import android.location.Geocoder;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class startAct extends Activity implements OnClickListener, LocationListener{
Button stopButton;
Geocoder geocoder;
Double latitude = 0.0;
Double longitude = 0.0;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
stopButton = (Button) findViewById(R.id.stop);
stopButton.setOnClickListener(this);
Criteria criteria = new Criteria();
criteria.setAccuracy(Criteria.ACCURACY_FINE);
LocationManager lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
LocationListener ll = new startAct();
Log.d("Hello", "I have been started");
/*String provider = lm.getBestProvider(criteria, true);
Location location = lm.getLastKnownLocation(provider);
Log.d("Hello", "I have been given something");
latitude = location.getLatitude();
longitude = location.getLongitude();
String lat = latitude + "";
String lgt = longitude + "";
Log.d("LOCATION CHANGED", lat);
Log.d("LOCATION CHANGED", lgt);
*/
lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, ll);
geocoder = new Geocoder(this, Locale.ENGLISH);
Log.d("Hello", "I have been created location");
}
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
Log.d("Clicked", "here clicked");
}
public void onLocationChanged(Location location) {
Log.d("Listening", "Changed");
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
String lat = latitude + "";
String lgt = longitude + "";
Log.d("LOCATION CHANGED", lat);
Log.d("LOCATION CHANGED", lgt);
}
else{
Log.d("Null", "Location is null");
}
String place = "City";
int maxResult = 5;
String addressList[] = new String[maxResult];
Log.d("Before Context", "testing");
maxResult = maxResult + 2;
Log.d("Before Context", "testing2");
try {
Log.d("Trying", "testing");
List<Address> addresses = geocoder.getFromLocation(latitude, longitude, maxResult);
Log.d("Trying", "got location");
if(addresses != null) {
Log.d("Trying", "I am not null");
for (int j = 0; j < maxResult; j++){
Address returnedAddress = addresses.get(j);
StringBuilder strReturnedAddress = new StringBuilder();
for(int i = 0; i < returnedAddress.getMaxAddressLineIndex(); i++) {
strReturnedAddress.append(returnedAddress.getAddressLine(i)).append("\n");
}
Log.d("Finshed", "Hard work done");
addressList[j] = strReturnedAddress.toString();
Log.v("Addr", addressList[j]);
}
}
else{
}
} catch (IOException e) {
// TODO Auto-generated catch block
Log.d("IO exception", "I cupped");
}
}
@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
}
}