Android onLocationChanged()从未调用
我正在编写一个代码,它带来了当前位置,但它没有给我位置,因为它从未调用Android onLocationChanged()从未调用,android,gps,locationmanager,Android,Gps,Locationmanager,我正在编写一个代码,它带来了当前位置,但它没有给我位置,因为它从未调用onLocationChanged()。是否有办法找到位置 对于这种情况,mobileLocation为0,因此执行转到else块 我的代码是 public class FindLocation { private LocationManager locManager; private LocationListener locListener; private Location mobileLocation; private
onLocationChanged()
。是否有办法找到位置
对于这种情况,mobileLocation为0,因此执行转到else块
我的代码是
public class FindLocation {
private LocationManager locManager;
private LocationListener locListener;
private Location mobileLocation;
private String provider;
public FindLocation(Context ctx){
locManager = (LocationManager) ctx.getSystemService(Context.LOCATION_SERVICE);
locListener = new LocationListener() {
@Override
public void onStatusChanged(String provider, int status,
Bundle extras) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onProviderDisabled(String provider) {
}
@Override
public void onLocationChanged(Location location) {
System.out.println("mobile location is in listener="+location);
mobileLocation = location;
}
};
locManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 1000, 1, locListener);
if (mobileLocation != null) {
locManager.removeUpdates(locListener);
String londitude = "Londitude: " + mobileLocation.getLongitude();
String latitude = "Latitude: " + mobileLocation.getLatitude();
String altitiude = "Altitiude: " + mobileLocation.getAltitude();
String accuracy = "Accuracy: " + mobileLocation.getAccuracy();
String time = "Time: " + mobileLocation.getTime();
Toast.makeText(ctx, "Latitude is = "+latitude +"Longitude is ="+londitude, Toast.LENGTH_LONG).show();
} else {
System.out.println("in find location 4");
Toast.makeText(ctx, "Sorry location is not determined", Toast.LENGTH_LONG).show();
}
}
}
我想你忘了许可
<uses-permission android:name="android.permission.ACCESS_GPS" />
<uses-permission android:name="android.permission.ACCESS_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.INTERNET" />
您是否从未获得位置,或者仅当您在评论中写道“有时它会获得位置,但在单击时不会获得位置”时才获得位置 可能是您的代码比LocationManager快,后者可能尚未调用onLocationChanged()。更改代码以获取最后一个已知位置,或等待调用LocaListener:
locManager.requestLocationUpdates(
LocationManager.GPS_PROVIDER, 1000, 1, locListener);
mobileLocation = locManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (mobileLocation != null) {
我在真实设备上运行我的应用程序。 我使用网络而不是GPS,onLocationChanged被称为:
locMan.requestSingleUpdate(LocationManager.NETWORK_PROVIDER, this, null);
直接在
locManager.requestLocationUpdates(LocationManager.GPS\u PROVIDER,1000,1,locListener)
之后添加以下代码:
locManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 1000, 1, locListener);
编辑:由于@Fabian Streitel的评论,更正了代码
import android.app.ActivityManager;
import android.app.Service;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.media.AudioManager;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Bundle;
import android.os.IBinder;
import android.os.PowerManager;
import android.util.Log;
import org.json.JSONObject;
import java.util.List;
public class AndroidLocationServices extends Service {
PowerManager.WakeLock wakeLock;
String MODULE="AndroidLocationServices",TAG="";
private LocationManager locationManager;
double getLattitude=0,getLogitude=0;
private static final long MIN_TIME_BW_UPDATES = 1; // 1 minute
private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 0;
public AndroidLocationServices() {
// TODO Auto-generated constructor stub
}
@Override
public IBinder onBind(Intent arg0) {
// TODO Auto-generated method stub
return null;
}
@Override
public void onCreate() {
// TODO Auto-generated method stub
super.onCreate();
preferences=getSharedPreferences(GlobalConfig.PREF_NAME, MODE_PRIVATE);
PowerManager pm = (PowerManager) getSystemService(this.POWER_SERVICE);
wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "DoNotSleep");
// Toast.makeText(getApplicationContext(), "Service Created",
// Toast.LENGTH_SHORT).show();
Log.e("Google", "Service Created");
}
@Override
@Deprecated
public void onStart(Intent intent, int startId) {
// TODO Auto-generated method stub
super.onStart(intent, startId);
Log.e("Google", "Service Started");
locationManager = (LocationManager) getApplicationContext().getSystemService(Context.LOCATION_SERVICE);
//locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 2500, 0, listener);
locationManager.requestLocationUpdates( LocationManager.NETWORK_PROVIDER, MIN_TIME_BW_UPDATES, MIN_DISTANCE_CHANGE_FOR_UPDATES, listener);
}
public LocationListener listener = new LocationListener() {
@Override
public void onLocationChanged(Location location) {
// TODO Auto-generated method stub
Log.e("Google", "Location Changed");
location.setAccuracy(100);
if (location == null)
return;
getLattitude=location.getLatitude();
getLogitude=location.getLongitude();
Log.e("latitude", getLattitude + "");
Log.e("longitude", getLogitude + "");
}
@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
}
};
@Override
public void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
// wakeLock.release();
}
}
舱单:
<service android:name=".services.AndroidLocationServices"/>
在我的情况下,应用程序没有请求权限。虽然我已经在menifest文件中添加了权限。因此,我无法允许我的应用程序访问该位置 作为修复,我手动转到:
Settings->Permissions->Your location
,并为我正在开发的应用程序启用了location权限。这就解决了我的问题
我假设只有通过Android Studio安装应用程序时才会出现此问题。我希望从Google Play安装应用程序时不会出现这种情况。
LocationManager。网络提供商需要网络,但它是真实的,不精确的;如果您想使用LocationManager.GPS\U PROVIDER
,情况必须是室外而不是室内,因为GPS定位需要卫星,如果您在任何建筑物中,卫星都找不到您 如果您在我启动Emulator或device时第一次检查Emulator或device?否(也在real machine上),它不会调用onLocationChanged(),因此变量mobileLocation为null。这意味着有时它会得到位置,但不是在单击时。虽然已经很晚了,但我希望此评论可以帮助其他人,请查看此链接:告诉我何时调用了method onLocationChanged()??当位置改变或调用侦听器时,在您的示例中,locManager不是一个函数。我不认为你的代码会compile@FabianStreitel,你是对的,我只是犯了一个愚蠢的错误,错过了。RequestLocationUpdate。我编辑了答案这也对我有用,如果你有机会,请做:)天哪!这就解决了我的问题。因为我在一幢大楼里,所以没有打回电话。当我外出工作时,我的工作很有魅力。
<service android:name=".services.AndroidLocationServices"/>
startService(new Intent(this, AndroidLocationServices.class));