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我正在使用此代码查找当前位置。

我的叠加层工作正常，但我无法获得当前的经度和纬度。获取用户当前位置时，应用程序关闭并显示“应用程序已意外停止”消息。

我已经研究了一些关于查找位置的教程，但我无法解决它。

package google.com;

import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapView;
import com.google.android.maps.MyLocationOverlay;
import com.google.android.maps.OverlayItem;

import java.util.*;
import com.google.android.maps.Overlay;
import android.location.*;
import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.graphics.drawable.Drawable;
import android.view.Menu;
import android.view.MenuItem;


public class nandyog extends MapActivity implements LocationListener{

      LocationManager locManager;   
      Location location;
      double lat;
      double lng;

     Boolean network_enabled;
     Boolean gps_enabled;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_map);

        MapView mapview = (MapView) findViewById(R.id.mapview);
        mapview.setBuiltInZoomControls(true);
        List<Overlay> mapOverlays = mapview.getOverlays();
        Drawable drawable = this.getResources().getDrawable(R.drawable.iconr);
        HelloItemizedOverlay itemizedoverlay = new HelloItemizedOverlay(drawable, this);
        locManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
        Location loc = locManager.getLastKnownLocation(locManager.NETWORK_PROVIDER);

        lat = loc.getLatitude();
        lng = loc.getLongitude();
                GeoPoint point = new GeoPoint((int) (lat * 1E6), (int) (lng * 1E6));
        OverlayItem overlayitem = new OverlayItem(point, "Current Location","LAL-DARWAJA");

        itemizedoverlay.addOverlay(overlayitem);
        mapOverlays.add(itemizedoverlay);
    }






    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_map, menu);
        return true;
    }

    @Override
    protected boolean isRouteDisplayed() {
        // TODO Auto-generated method stub
        return false;
    }






    @Override
    public void onLocationChanged(Location location) {
        // TODO Auto-generated method stub

        lat = location.getLatitude();
        lng = location.getLongitude();


    }






    @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


    }
}
/*
final class GPoint extends GeoPoint {
    public GPoint(double latitude, double longitude) {
        super((int) (latitude * 1E6), (int) (longitude * 1E6));
    }
}
*/

我的清单文件在下面

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="google.com"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="7"
        android:targetSdkVersion="10" />

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




    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
      >
        <uses-library android:name="com.google.android.maps"/>
        <activity
            android:name=".nandyog"
            android:label="@string/title_activity_map"
              android:theme="@android:style/Theme.NoTitleBar"  
            >

            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

Logcat 错误是...

暂停 4ms+32ms 08-31 18:56:09.355: I/Process(368): 发送信号。PID：368 SIG：9

4

1 回答 1

0

您是否尝试从中获取布尔值：

network_enabled = locManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);

你应该NETWORK_PROVIDER像这样以静态方式访问

Location loc = locManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);

不是

Location loc = locManager.getLastKnownLocation(locManager.NETWORK_PROVIDER);
于 2012-08-30T15:13:55.893 回答