Question

我知道这个问题已被多次询问，但我找不到解决方案：无论我尝试什么，我都无法从给定地址检索LatLng。你能看看我的代码，以指导我并找到解决方案吗？我在这里变得疯狂......

以下是代码：

public LatLng getCoordinates(String address){

    Geocoder geocoder = new Geocoder(mContext);
    List<Address> addresses;

    double latitude=0;
    double longitude=0;
    LatLng coordinates;

    try {

        if(geocoder.isPresent()){
            System.out.println("Geocoder present!");
            //Geocoder is actually present
        }
        else
            System.out.println("Geocoder NOT present!");

        addresses = geocoder.getFromLocationName(address, 1);                

        /* I tried this too, but it didn't work:
        int count=0;
        addresses = geocoder.getFromLocationName(address, 10);
        while(addresses.size()==0 && count<10){
            addresses = geocoder.getFromLocationName(address, count);
            count++;
        }
        */

        //This instruction throws the exception
        System.out.println("addresses variable = "+addresses.get(0).toString());

        System.out.println("addresses size="+addresses.size());
        if(addresses.size() > 0) {
            latitude= addresses.get(0).getLatitude();
            longitude= addresses.get(0).getLongitude();
            // latitude= addresses.get(count).getLatitude();
            // longitude= addresses.get(count).getLongitude();
        }
    }catch (Exception e){
        e.printStackTrace();
    }

    coordinates = new LatLng(latitude,longitude);
    return coordinates;
}

这是printStackTrace结果：

02-08 17:33:50.922 9152-9152/com.clb.apokalos.todolistas W/System.err: java.lang.IndexOutOfBoundsException: Invalid index 0, size is 0
02-08 17:33:50.922 9152-9152/com.clb.apokalos.todolistas W/System.err:     at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:251)
02-08 17:33:50.932 9152-9152/com.clb.apokalos.todolistas W/System.err:     at java.util.ArrayList.get(ArrayList.java:304)
02-08 17:33:50.932 9152-9152/com.clb.apokalos.todolistas W/System.err:     at com.clb.apokalos.todolistas.GPSTracker.getCoordinates(GPSTracker.java:178)
02-08 17:33:50.932 9152-9152/com.clb.apokalos.todolistas W/System.err:     at com.clb.apokalos.todolistas.GeofenceMainActivity.populateGeofenceList(GeofenceMainActivity.java:365)
02-08 17:33:50.942 9152-9152/com.clb.apokalos.todolistas W/System.err:     at com.clb.apokalos.todolistas.GeofenceMainActivity.onCreate(GeofenceMainActivity.java:100)
02-08 17:33:50.942 9152-9152/com.clb.apokalos.todolistas W/System.err:     at android.app.Activity.performCreate(Activity.java:5024)
02-08 17:33:50.942 9152-9152/com.clb.apokalos.todolistas W/System.err:     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
02-08 17:33:50.952 9152-9152/com.clb.apokalos.todolistas W/System.err:     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2042)
02-08 17:33:50.952 9152-9152/com.clb.apokalos.todolistas W/System.err:     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2103)
02-08 17:33:50.952 9152-9152/com.clb.apokalos.todolistas W/System.err:     at android.app.ActivityThread.access$600(ActivityThread.java:137)
02-08 17:33:50.952 9152-9152/com.clb.apokalos.todolistas W/System.err:     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1211)
02-08 17:33:50.962 9152-9152/com.clb.apokalos.todolistas W/System.err:     at android.os.Handler.dispatchMessage(Handler.java:99)
02-08 17:33:50.972 9152-9152/com.clb.apokalos.todolistas W/System.err:     at android.os.Looper.loop(Looper.java:137)
02-08 17:33:50.972 9152-9152/com.clb.apokalos.todolistas W/System.err:     at android.app.ActivityThread.main(ActivityThread.java:4842)
02-08 17:33:50.972 9152-9152/com.clb.apokalos.todolistas W/System.err:     at java.lang.reflect.Method.invokeNative(Native Method)
02-08 17:33:50.972 9152-9152/com.clb.apokalos.todolistas W/System.err:     at java.lang.reflect.Method.invoke(Method.java:511)
02-08 17:33:50.972 9152-9152/com.clb.apokalos.todolistas W/System.err:     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:842)
02-08 17:33:50.982 9152-9152/com.clb.apokalos.todolistas W/System.err:     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:609)
02-08 17:33:50.982 9152-9152/com.clb.apokalos.todolistas W/System.err:     at dalvik.system.NativeStart.main(Native Method)

谢谢大家！

编辑（已解决）：发现问题！我以“ ShopName，地址，城市”的形式提供地址（我使用的信息从查询门户到谷歌）并且它不起作用，所以我只是简单地在“地址，城市”的形式，现在它的作品！再次感谢！

Geocoder中的getFromLocationName返回null

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