android - 我们如何从android中的地址找到lat long？

Question

我有一个地址，想找到该地址的纬度和经度...任何人都知道我们如何从 android 中的地址获取经纬度...

我正在使用这个代码

Geocoder coder = new Geocoder(getApplicationContext(), Locale
                    .getDefault());

            List<Address> address;

            address = coder.getFromLocationName(
                    "Pallekele International Cricket Stadium,Kandy, 1);
            if (address == null) {

            }
            Address location = address.get(0);
            location.getLatitude();
            location.getLongitude();

            GeoPoint point = new GeoPoint((int) (location.getLatitude() * 1E6),
                    (int) (location.getLongitude() * 1E6));

但是我遇到了这个异常

09-02 17:46:56.086: ERROR/Exception(1724): Service not Available
09-02 17:46:56.086: ERROR/Exception(1724): java.io.IOException: Service not Available
09-02 17:46:56.086: ERROR/Exception(1724):     at android.location.Geocoder.getFromLocationName(Geocoder.java:159)
09-02 17:46:56.086: ERROR/Exception(1724):     at pack.sample.map.SampleMapApplication.onCreate(SampleMapApplication.java:38)
09-02 17:46:56.086: ERROR/Exception(1724):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
09-02 17:46:56.086: ERROR/Exception(1724):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
09-02 17:46:56.086: ERROR/Exception(1724):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
09-02 17:46:56.086: ERROR/Exception(1724):     at android.app.ActivityThread.access$2300(ActivityThread.java:125)
09-02 17:46:56.086: ERROR/Exception(1724):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
09-02 17:46:56.086: ERROR/Exception(1724):     at android.os.Handler.dispatchMessage(Handler.java:99)
09-02 17:46:56.086: ERROR/Exception(1724):     at android.os.Looper.loop(Looper.java:123)
09-02 17:46:56.086: ERROR/Exception(1724):     at android.app.ActivityThread.main(ActivityThread.java:4627)
09-02 17:46:56.086: ERROR/Exception(1724):     at java.lang.reflect.Method.invokeNative(Native Method)
09-02 17:46:56.086: ERROR/Exception(1724):     at java.lang.reflect.Method.invoke(Method.java:521)
09-02 17:46:56.086: ERROR/Exception(1724):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
09-02 17:46:56.086: ERROR/Exception(1724):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
09-02 17:46:56.086: ERROR/Exception(1724):     at dalvik.system.NativeStart.main(Native Method)

我做错了什么？

Answer 1

您收到服务不可用错误。您需要一个实际的设备，而不是模拟器。 GeoCoder documentation说:

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.

这issue page说:

Are you guys using this code on the Android 2.2 emulator? I'm also getting this error on the emulator but it works on the actual device (nexus one - android 2.2)

Just installed CyanogenMod 6 alfa and now GeoCoder works fine. I guess it will work on final builds of stock Froyo too.