标签: locationmanager

我正在尝试创建一个每五分钟发送一次用户位置更新的应用程序.我想我的代码工作得很好,但是我收到有关应用程序正在使用的权限的错误.我很确定我已在清单文件中添加了权限.有人能告诉我什么是错的吗？这是我的代码.

MainActivity.java

LocationManager locationManager ;
String provider;

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

    // Getting LocationManager object
    locationManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);

    // Creating an empty criteria object
    Criteria criteria = new Criteria();

    // Getting the name of the provider that meets the criteria
    provider = locationManager.getBestProvider(criteria, false);

    if(provider!=null && !provider.equals("")){

        // Get the location from the given provider
        Location location = locationManager.getLastKnownLocation(provider);
        locationManager.requestLocationUpdates(provider,5*60*1000,0,this);

        if(location!=null)
            onLocationChanged(location);
        else
            Toast.makeText(getBaseContext(), "Location can't be retrieved", Toast.LENGTH_SHORT).show();

    }else{
        Toast.makeText(getBaseContext(), "No Provider Found", Toast.LENGTH_SHORT).show();
    } …

我有一个扩展Fragment的类并实现了LocationListener.当我写作

LocationManager myLocalManager =
(LocationManager)getSystemService(Context.LOCATION_SERVICE);

我得到一个编译时错误,因为该方法getSystemService不是Fragment的方法.

我能做些什么来创造LocationManager？

总的来说，我对 Kotlin 协程和 Android 开发很陌生。在尝试了解它是如何工作的时，我遇到了一个似乎无法解决的错误。

从基本活动中，我尝试连接到 googleApiClient。权限没问题。我希望使用 kotlin 协程以直接方式从 LocationManager 获取位置更新，以便稍后使用此 Location 对象。我第一次在模拟器中改变我的位置时它工作正常，第二次我改变我的位置时，它崩溃了，异常如下：

FATAL EXCEPTION: main
    Process: com.link_value.eventlv, PID: 32404
    java.lang.IllegalStateException: Already resumed, but got value Location[gps 48.783000,2.516180 acc=20 et=+59m16s372ms alt=0.0 {Bundle[mParcelledData.dataSize=40]}]
    at kotlinx.coroutines.experimental.AbstractContinuation.resumeImpl(AbstractContinuation.kt:79)
    at kotlinx.coroutines.experimental.AbstractContinuation.resume(AbstractContinuation.kt:72)
    at com.link_value.eventlv.View.Create.NewEventLvActivity$await$2$1.onLocationChanged(NewEventLvActivity.kt:100)
    at android.location.LocationManager$ListenerTransport._handleMessage(LocationManager.java:297)
    at android.location.LocationManager$ListenerTransport.-wrap0(LocationManager.java)
    at android.location.LocationManager$ListenerTransport$1.handleMessage(LocationManager.java:242)
     at android.os.Handler.dispatchMessage(Handler.java:102)
     at android.os.Looper.loop(Looper.java:154)
     at android.app.ActivityThread.main(ActivityThread.java:6077)
     at java.lang.reflect.Method.invoke(Native Method)
     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:756)



override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_new_event_lv)

    askForUserLocation()
    val locationManager = this.getSystemService(Context.LOCATION_SERVICE) as LocationManager
    val presenter = CreateEventPresenterImpl(this@NewEventLvActivity)

    googleApiClient = GoogleApiClient.Builder(this@NewEventLvActivity)
            .enableAutoManage(this /* …

我使用NETWORK_PROVIDER来获得latitude和longitude的地方.

我已经检查了"位置和安全性"中的设置并启用了"使用无线网络".但"isProviderEnabled(LocationManager.NETWORK_PROVIDER)"总是回来false.

谁能帮我？先感谢您!

这是我的代码:

LocationManager locManager=(LocationManager) getSystemService(Context.LOCATION_SERVICE);
boolean isEnableGPS=locManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
boolean isEnableNTW=locManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
Log.d(TAG, isEnableGPS+", "+isEnableNTW);

AndroidMainfest.xml中的权限

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

这个问题与" Android:获取用户的当前位置而不使用gps或互联网 " 相同的主流stackoverflow问题直接相关,其中接受的答案实际上没有回答问题.

我应该能够通过网络提供商而不是GPS或互联网获取设备的当前位置名称(例如:城市名称,村庄名称).以下是该问题的公认答案.(以下代码部分应包含在onCreate()方法中)

// Acquire a reference to the system Location Manager
LocationManager locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);

// Define a listener that responds to location updates
LocationListener locationListener = new LocationListener() {
    public void onLocationChanged(Location location) {
      // Called when a new location is found by the network location provider.
      makeUseOfNewLocation(location);
    }

    public void onStatusChanged(String provider, int status, Bundle extras) {}

    public void onProviderEnabled(String provider) {}

    public void onProviderDisabled(String provider) {}
  };

// Register the listener …

干净利落.我开始一项活动并检查手机是否启用了GPS模块.如果未启用,我会通过对话框提示用户,并询问他是否要手动启用它.在是,我激活位置设置.现在用户可以根据需要启用它,但我需要检查他做了什么.

try {
    isGPSEnabled = locationManager
            .isProviderEnabled(LocationManager.GPS_PROVIDER);
} catch (Exception ex) {}
if (isGPSEnabled) {
    locationManager.requestLocationUpdates(
            LocationManager.GPS_PROVIDER, 0, 0, locationListenerGps);
} else {
    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setMessage(
            "Your GPS module is disabled. Would you like to enable it ?")
            .setCancelable(false)
            .setPositiveButton("Yes",
                    new DialogInterface.OnClickListener() {

                        public void onClick(DialogInterface dialog,
                                int id) {
                            // Sent user to GPS settings screen
                            final ComponentName toLaunch = new ComponentName(
                                    "com.android.settings",
                                    "com.android.settings.SecuritySettings");
                            final Intent intent = new Intent(
                                    Settings.ACTION_LOCATION_SOURCE_SETTINGS);
                            intent.addCategory(Intent.CATEGORY_LAUNCHER);
                            intent.setComponent(toLaunch);
                            intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                            startActivityForResult(intent, 1); …

我在Android中的onLocationChanged事件有问题.这是触发:

case R.id.start: {
    Points.add(overlay.getMyLocation()); // Points' type is ArrayList<GeoPoint>
    mgr.requestLocationUpdates(best, 0, 3, locationListener);
    }
    break;

这是onLocationChanged方法:

public void onLocationChanged(Location location) {
    i++;
    Points.add(overlay.getMyLocation());
    MapOverlay mapOverlay = new MapOverlay(Points.get(i-1), Points.get(i));
    map.getOverlays().add(mapOverlay); //does the drawing
    mMapController.animateTo(Points.get(i));
}

因此,onLocationChanged仅在我按"start"后调用一次.它应该在每次位置发生变化时自动调用,对吗？就我而言,事实并非如此.
请帮我.

我有一个应用程序,它使用网络提供程序的位置.每次应用程序启动时,它都会检查是否使用LocationManager中的isProviderEnabled()方法启用了网络提供程序.如果返回false,则向用户发出警报以启用网络提供程序,然后使用该应用程序.这个逻辑一直运行得非常好,除了一些非例外的非Google认证设备(因为它们通常也没有Maps API).最近,对于ICS上的一些设备,现在在JellyBean模拟器上,即使启用了isProviderEnabled(),我也会得到一致的"假".

我已经转移到使用从Settings.Secure.getString(getContentResolver(),Settings.Secure.LOCATION_PROVIDERS_ALLOWED)返回的字符串,以查看它是否包含"网络".这是一个黑客,但它现在正在工作.我希望能够使用isProviderEnabled()方法.

以前有人看过这个问题吗？

我正在使用Google API和MapActivity,MapView等.
当我需要获取当前位置时,我会在第一时间使用此代码:

myLocationManager =(LocationManager)getSystemService(Context.LOCATION_SERVICE);
// Sets the criteria for a fine and low power provider
Criteria crit = new Criteria();
crit.setAccuracy(Criteria.ACCURACY_FINE);
crit.setPowerRequirement(Criteria.POWER_LOW);    
// Gets the best matched provider, and only if it's on
String provider = myLocationManager.getBestProvider(crit, true);
// If there are no location providers available
if (provider == null){
    OnClickListener listener = new OnClickListener() {

        public void onClick(DialogInterface dialog, int which) {
            // Closes the activity
            finish();
        }
    };
    Utils.getInstance().showAlertDialog(this, R.string.warning_dialog_title,
                               R.string.no_location_providers_error_message,
                            android.R.drawable.ic_dialog_alert, false, listener);
}
// Location …

在三星Galaxy S2(GT-i9100),Android版本4.3上测试应用程序时,我有这个奇怪的堆栈跟踪.如果它有帮助,Bugsense报告"日志数据"= {u'ms_from_start':u'19915',u'rooted':u'true'},所以我不太确定这个设备是否有根(客户端)正在测试应用程序,而不是我).编辑:当我输入此信息时,客户确认我该设备正在使用自定义ROM,如果它很重要.

无论如何,这是一个完整的堆栈跟踪:

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.mypackagename/com.mypackagename.activities.ARActivity}: 

java.lang.SecurityException: invalid package name: com.google.android.gms
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2355)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2405)
    at android.app.ActivityThread.access$600(ActivityThread.java:156)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1272)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:137)
    at android.app.ActivityThread.main(ActivityThread.java:5303)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:525)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:739)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:555)
    at dalvik.system.NativeStart.main(Native Method)

Caused by: java.lang.SecurityException: invalid package name: com.google.android.gms
    at android.os.Parcel.readException(Parcel.java:1431)
    at android.os.Parcel.readException(Parcel.java:1385)
    at android.location.ILocationManager$Stub$Proxy.requestLocationUpdates(ILocationManager.java:540)
    at android.location.LocationManager.requestLocationUpdates(LocationManager.java:836)
    at android.location.LocationManager.requestLocationUpdates(LocationManager.java:430)
    at android.privacy.surrogate.PrivacyLocationManager.requestLocationUpdates(PrivacyLocationManager.java:290)
    at com.mypackagename.activities.ARActivity.onCreate(ARActivity.java:371)
    at android.app.Activity.performCreate(Activity.java:5259)
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1098)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2309)

现在,ARActivity.java:371正在调用

locationManager.requestLocationUpdates(GPS, gpsRefreshPeriod, 0, locListener);

哪里

private String GPS = "gps";
private …