Android locationManager.getBestProvider返回null
显然,我的应用程序在启动时崩溃了,尽管我在清单中启用了粗略和精细的位置权限。我还添加了互联网许可 我的代码:Android locationManager.getBestProvider返回null,android,location,maps,parse-server,Android,Location,Maps,Parse Server,显然,我的应用程序在启动时崩溃了,尽管我在清单中启用了粗略和精细的位置权限。我还添加了互联网许可 我的代码: locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); provider = locationManager.getBestProvider(new Criteria(), false); if (ActivityCompat.checkSelfPermission(
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
provider = locationManager.getBestProvider(new Criteria(), false);
if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(
this,
new String[]{android.Manifest.permission.ACCESS_COARSE_LOCATION, android.Manifest.permission.ACCESS_FINE_LOCATION},
PERMISSION_LOCATION_REQUEST_CODE);
}
locationManager.requestLocationUpdates(provider, 400, 1, this);
下面是日志:
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.project.korsa.korsa, PID: 32462
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.project.korsa.korsa/com.project.korsa.korsa.YourLocation}: java.lang.IllegalArgumentException: invalid provider: null
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3305)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3401)
at android.app.ActivityThread.access$1100(ActivityThread.java:229)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1821)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:7303)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
Caused by: java.lang.IllegalArgumentException: invalid provider: null
at android.location.LocationManager.checkProvider(LocationManager.java:1761)
at android.location.LocationManager.requestLocationUpdates(LocationManager.java:464)
at com.project.korsa.korsa.YourLocation.onCreate(YourLocation.java:135)
at android.app.Activity.performCreate(Activity.java:6904)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1136)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3252)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3401)
at android.app.ActivityThread.access$1100(ActivityThread.java:229)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1821)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:7303)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
检查一下这个安瑟尔
在对getBestProvider()的调用中,您要求提供已启用的提供程序
only(这是方法调用中您拥有的第二个参数)
设置为true)。如果用户已禁用所有提供程序,您将获得
空
检查一下这个安瑟尔
在对getBestProvider()的调用中,您要求提供已启用的提供程序
only(这是方法调用中您拥有的第二个参数)
设置为true)。如果用户已禁用所有提供程序,您将获得
空
是否确实明确请求位置权限?仅在清单xml中声明它是不起作用的,因为这些是危险的权限,需要显式获取它们。确实要显式请求位置权限吗?仅仅在清单xml中声明它是行不通的,因为这些是危险的权限,需要显式地使用它们。