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java - GPS Android - 无法在实际手机上检索位置,但可以在模拟器上使用

转载 作者:行者123 更新时间:2023-12-01 04:52:39 25 4
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在实际手机或设备上测试时,我无法获取手机的纬度和经度,它总是返回 null 值,但是当我在模拟器上测试它并使用 DDMS 发送坐标时,它成功返回纬度和经度。

这是我的类(class):

package locateodroid.james;

import java.io.IOException;
import java.util.List;
import java.util.Locale;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
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.telephony.SmsManager;
import android.telephony.SmsMessage;
import android.widget.EditText;
import android.widget.Toast;

public class SMSReceiver extends BroadcastReceiver{

public SharedPreferences prefs;
private String Keywords = "prefmode";
private Double lat;
private Double lon;
private static final String FAR_MODE_KEY = "farmode";
private Context con;

@Override
public void onReceive(Context context, Intent intent) {

con = context;
String FarModeKeyword= "";
String message = "";
String number = "";
prefs = context.getSharedPreferences(Keywords, Context.MODE_PRIVATE);
FarModeKeyword = prefs.getString(FAR_MODE_KEY, "");

//---get the SMS message passed in---
Bundle bundle = intent.getExtras();
SmsMessage[] msgs = null;

if (bundle != null)
{
//---retrieve the SMS message received---
Object[] pdus = (Object[]) bundle.get("pdus");
msgs = new SmsMessage[pdus.length];
for (int i=0; i<msgs.length; i++)
{
msgs[i] = SmsMessage.createFromPdu((byte[])pdus[i]);
message += msgs[i].getMessageBody().toString();
}

for (int i=0; i<msgs.length; i++)
{
msgs[i] = SmsMessage.createFromPdu((byte[])pdus[i]);
number += msgs[i].getOriginatingAddress();
}

}


getLocation();
Toast.makeText(context,
lat + "_" + lon,
Toast.LENGTH_SHORT).show();
sendSMS(number, lat + "_" + lon);


}

private void sendSMS(String phoneNumber, String message)
{
SmsManager sms = SmsManager.getDefault();
sms.sendTextMessage(phoneNumber, null, message, null, null);
}

private getLocation ()
{
// Get the location manager
LocationManager locationManager = (LocationManager)con.getSystemService(Context.LOCATION_SERVICE);
Criteria criteria = new Criteria ();
Geocoder geoCoder = new Geocoder(con);
LocationListener MyLocListener = new LocListener();
List<String> providers = locationManager.getProviders(true);
for (String provider : providers) {
locationManager.requestLocationUpdates(provider, 0, 0, MyLocListener);
}

Location location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
lat = location.getLatitude();
lon = location.getLongitude();

}


public class LocListener implements LocationListener
{
@Override
public void onLocationChanged(Location loc) {
lat = loc.getLatitude();
lon = loc.getLongitude();
}

@Override
public void onProviderDisabled(String arg0) {
// 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

}
}
}

提前致谢!

最佳答案

您是否在 list 中授予了获取 GPS 坐标的所有权限?您是否检查过手机中的“使用 GPS Settelite”选项是否已被选中?您是否尝试在建筑物外获取数据,因为 GPS 在建筑物内无法修复。

如果所有这些问题的答案都是“否”。请先这样做。

关于java - GPS Android - 无法在实际手机上检索位置,但可以在模拟器上使用,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/14713785/

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