我正在使用地理编码器,但它在我的设备上工作正常,但在模拟器上却无法工作,但在2.2和4.2.2上尝试了一下却无法正常工作；

这是我的代码：

Geocoder myLocation = new Geocoder(AzanTime.this, Locale.getDefault());
List<Address> myList=null;
try {
    myList = myLocation.getFromLocation(latitude,longitude, 1);
} catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
}
Address address = (Address) myList.get(0);
String addressStr = "";
if(address.getAddressLine(0)!=null){
    addressStr += address.getAddressLine(0);

}

和logcat：

01-11 09:31:07.573: E/AndroidRuntime(788): FATAL EXCEPTION: main
01-11 09:31:07.573: E/AndroidRuntime(788): java.lang.RuntimeException: Unable to start activity ComponentInfo{amina.myhomebusiness.IslamicApps.FortressOfTheMuslimExplanation/amina.myhomebusiness.IslamicApps.FortressOfTheMuslimExplanation.AzanTime}: java.lang.IllegalArgumentException: provider doesn't exisit: null
01-11 09:31:07.573: E/AndroidRuntime(788):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
01-11 09:31:07.573: E/AndroidRuntime(788):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
01-11 09:31:07.573: E/AndroidRuntime(788):  at android.app.ActivityThread.access$600(ActivityThread.java:141)
01-11 09:31:07.573: E/AndroidRuntime(788):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
01-11 09:31:07.573: E/AndroidRuntime(788):  at android.os.Handler.dispatchMessage(Handler.java:99)
01-11 09:31:07.573: E/AndroidRuntime(788):  at android.os.Looper.loop(Looper.java:137)
01-11 09:31:07.573: E/AndroidRuntime(788):  at android.app.ActivityThread.main(ActivityThread.java:5041)
01-11 09:31:07.573: E/AndroidRuntime(788):  at java.lang.reflect.Method.invokeNative(Native Method)
01-11 09:31:07.573: E/AndroidRuntime(788):  at java.lang.reflect.Method.invoke(Method.java:511)
01-11 09:31:07.573: E/AndroidRuntime(788):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
01-11 09:31:07.573: E/AndroidRuntime(788):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
01-11 09:31:07.573: E/AndroidRuntime(788):  at dalvik.system.NativeStart.main(Native Method)
01-11 09:31:07.573: E/AndroidRuntime(788): Caused by: java.lang.IllegalArgumentException: provider doesn't exisit: null
01-11 09:31:07.573: E/AndroidRuntime(788):  at android.os.Parcel.readException(Parcel.java:1429)
01-11 09:31:07.573: E/AndroidRuntime(788):  at android.os.Parcel.readException(Parcel.java:1379)
01-11 09:31:07.573: E/AndroidRuntime(788):  at android.location.ILocationManager$Stub$Proxy.requestLocationUpdates(ILocationManager.java:538)
01-11 09:31:07.573: E/AndroidRuntime(788):  at android.location.LocationManager.requestLocationUpdates(LocationManager.java:836)
01-11 09:31:07.573: E/AndroidRuntime(788):  at android.location.LocationManager.requestLocationUpdates(LocationManager.java:430)

01-11 09:31:07.573: E/AndroidRuntime(788):  at android.app.Activity.performCreate(Activity.java:5104)
01-11 09:31:07.573: E/AndroidRuntime(788):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
01-11 09:31:07.573: E/AndroidRuntime(788):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
01-11 09:31:07.573: E/AndroidRuntime(788):  ... 11 more

解决方法:

模拟器上未安装Geocoder.
累积至Geocoder参考

The Geocoder class requires a backend service that is not included in the core android framework. The Geocoder query methods will return an empty list if there no backend service in the platform. Use the isPresent() method to determine whether a Geocoder implementation exists.

你应该检查一下

Geocoder.isPresent()

在访问API之前.
使用自己的实现更可靠.
检查此答案以了解我的实现.
problems with android.location.geocoder