Question

在我的申请中，我没有得到当前的经度和经度

public class MainActivity extends Activity implements
    LocationListener {
protected LocationManager locationManager;
protected LocationListener locationListener;
protected Context context;
TextView txtLat;
String lat;
String provider;
protected String latitude, longitude;
protected boolean gps_enabled, network_enabled;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.google_map_send_my_current_latlong);
    txtLat = (TextView) findViewById(R.id.textView1);

    locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
    locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0,
            0, this);
}

@Override
public void onLocationChanged(Location location) {
    txtLat = (TextView) findViewById(R.id.textView1);
    txtLat.setText("Latitude:" + location.getLatitude() + ", Longitude:"
            + location.getLongitude());
}

@Override
public void onProviderDisabled(String provider) {
    Log.d("Latitude", "disable");
}

@Override
public void onProviderEnabled(String provider) {
    Log.d("Latitude", "enable");
}

@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
    Log.d("Latitude", "status");
}
   }

和我的清单我添加了

 <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

我想在TextView中显示当前的纬度和经度。我检查了Real设备

Answer 1

我提供简单有效的代码来获取当前位置的纬度和经度，并给出最佳结果;首先它会看到卫星位置比INTERNET位置比Sim位置，如果没有找到任何东西就给出消息......它也会给移动位置：

package selecom.loc;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.view.Menu;
import android.widget.TextView;
//don't implents LocationListner if you wants only latitude and longitude 
//only at a time

public class MainActivity extends Activity implements LocationListener{
LocationManager locationManager;
TextView tvLatitude, tvLongitude;
String provider;
Location location;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    tvLongitude=(TextView)findViewById(R.id.lng);
    tvLatitude=(TextView)findViewById(R.id.lat);

    locationManager =(LocationManager)this.getSystemService(Context.LOCATION_SERVICE);
    Criteria c=new Criteria(); 
    //if we pass false than
    //it will check first satellite location than Internet and than Sim Network
    provider=locationManager.getBestProvider(c, false);
    location=locationManager.getLastKnownLocation(provider);
    if(location!=null)
    {
        double lng=location.getLongitude();
        double lat=location.getLatitude();
        tvLongitude.setText(""+lng);
        tvLatitude.setText(""+lat);
    }
    else
    {
        tvLongitude.setText("No Provider");
        tvLatitude.setText("No Provider");
    }
}
 //The below methods can be removed if you don't want location on move
@Override
public void onLocationChanged(Location arg0) 
{
    double lng =location.getLongitude();
    double lat=location.getLatitude();
    tvLongitude.setText(""+lng);
    tvLatitude.setText(""+lat);   
}
@Override
public void onProviderDisabled(String arg0) {  
}
@Override
public void onProviderEnabled(String arg0) {   
}
@Override
public void onStatusChanged(String arg0, int arg1, Bundle arg2) {
 }
}

Answer 2

在你的onCreate（）方法中调用此方法并检查它是否适合你

public Location getLocation(){

    try {
        locMan=(LocationManager)mContext.getSystemService(LOCATION_SERVICE);
        isGPSEnabled=locMan.isProviderEnabled(LocationManager.GPS_PROVIDER);
        isNetworkEnabled=locMan.isProviderEnabled(LocationManager.NETWORK_PROVIDER);

        if(isGPSEnabled||isNetworkEnabled)
        {
            canGetLocation=true;
            if(isNetworkEnabled)
            {
                locMan.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, MIN_TIME, DIST,this);
                if(locMan!=null)
                {
                    loc=locMan.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
                    if(loc!=null)
                    {
                        Toast.makeText(mContext, "loac", Toast.LENGTH_SHORT).show();
                        latitude=loc.getLatitude();
                        longitude=loc.getLongitude();
                        LocationLogic.getInstance().setLat(latitude);
                        LocationLogic.getInstance().setLang(longitude);

                    }
                }

            }
            if(isGPSEnabled&&loc==null)
            {
                locMan.requestLocationUpdates(LocationManager.GPS_PROVIDER, MIN_TIME, DIST,this);
                if(locMan!=null)
                {
                    loc=locMan.getLastKnownLocation(LocationManager.GPS_PROVIDER);
                    if(loc!=null)
                    {
                        Toast.makeText(mContext, "loac", Toast.LENGTH_SHORT).show();
                        latitude=loc.getLatitude();
                        longitude=loc.getLongitude();
                        LocationLogic.getInstance().setLat(latitude);
                        LocationLogic.getInstance().setLang(longitude);
                    }
                }

            }
        }

    double d=distTo(latitude, longitude, 31.3256, 75.5792);
    setDist(d);
    //  doReverseGeoCodingTask(loc);
        Log.i("done","done");

    } catch (Exception e) {
        // TODO: handle exception
        e.printStackTrace();
    }

    return loc;

}

还要在清单文件中添加以下权限：

    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.INTERNET" />

<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
   <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />

希望这对你有用。确保您已打开GPS或互联网。

没有获得当前的经度和纬度

2 个答案: