java.lang.IllegalArgumentException上的错误:provider == null

时间:2012-09-21 04:51:41

标签: android google-maps gps illegalargumentexception

我向android市场发布了我的应用程序。我的主页出错了。有人写了崩溃错误。但是这个应用程序完全适用于我的真实设备。我也加入了许可。 我的错误:

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.karthi.locationspeecher/com.android.locationspeecher.LocationSpeecher}: java.lang.IllegalArgumentException: provider==null
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1651)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1667)
at android.app.ActivityThread.access$1500(ActivityThread.java:117)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:935)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:130)
at android.app.ActivityThread.main(ActivityThread.java:3687)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.IllegalArgumentException: provider==null
at android.location.LocationManager.getLastKnownLocation(LocationManager.java:1017)
at com.android.locationspeecher.LocationSpeecher.onCreate(LocationSpeecher.java:84)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1615)
... 11 more

的LocationManager:

 LocationManager locationManager; 
            String context = Context.LOCATION_SERVICE; 
            locationManager = (LocationManager)getSystemService(context); 

            Criteria crta = new Criteria(); 
            crta.setAccuracy(Criteria.ACCURACY_FINE); 
            crta.setAltitudeRequired(false); 
            crta.setBearingRequired(false); 
            crta.setCostAllowed(true); 
            crta.setPowerRequirement(Criteria.POWER_LOW); 
            String provider = locationManager.getBestProvider(crta, true); 

         // String provider = LocationManager.GPS_PROVIDER; 
            Location location = locationManager.getLastKnownLocation(provider); 
            updateWithNewLocation(location); 

            locationManager.requestLocationUpdates(provider, 2000, 10, locationListener); 
            } 

3 个答案:

答案 0 :(得分:6)

由于GPS Providers无法使用,您最有可能收到此错误。如果Gps ProviderNetwork Provider已启用到位置设置,请让此人检查设置。

答案 1 :(得分:0)

另外,请确保将android.permission.ACCESS_FINE_LOCATIONandroid.permission.ACCESS_COARSE_LOCATION添加到您的清单文件中,这解决了我的问题(所有提供商都已在位置设置中启用)。

答案 2 :(得分:0)

我通过添加:

解决了这个问题

`[assembly:UsesPermission(Manifest.Permission.AccessFineLocation)] [assembly:UsesPermission(Manifest.Permission.AccessCoarseLocation)] [assembly:UsesPermission(Manifest.Permission.Internet)]'

在assemlyInfo.cs中授予权限