java - Android:无法从 Google Geocoding API 获取位置名称

Question

我正在尝试使用谷歌反向地理编码 API 从纬度和经度获取位置名称。我收到了错误。

这是我正在使用的代码:

  Geocoder geocoder= new Geocoder(MainActivity.this, Locale.ENGLISH);
         
        try {
               
              //Place your latitude and longitude
              List<Address> addresses = geocoder.getFromLocation(37.423247,-122.085469, 1);
              
              TextView myAddress=(TextView)findViewById(R.id.textView1);
				if(addresses != null) {
               
                  Address fetchedAddress = addresses.get(0);
                  StringBuilder strAddress = new StringBuilder();
                
                  for(int i=0; i<fetchedAddress.getMaxAddressLineIndex(); i++) {
                        strAddress.append(fetchedAddress.getAddressLine(i)).append("\n");
                  }
                
                  myAddress.setText("I am at: " +strAddress.toString());
               
              }
               
              else
                  myAddress.setText("No location found..!");
          
        } 
        catch (IOException e) {
                 // TODO Auto-generated catch block
                 e.printStackTrace();
                 Toast.makeText(MainActivity.this,"Could not get address..!", Toast.LENGTH_LONG).show();
        }

日志文件

 FATAL EXCEPTION: main
     java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.get_mobiile_location/com.example.get_mobiile_location.MainActivity}: java.lang.IndexOutOfBoundsException: Invalid index 0, size is 0
     	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211)
     	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
     	at android.app.ActivityThread.access$600(ActivityThread.java:141)
     	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
     	at android.os.Handler.dispatchMessage(Handler.java:99)
     	at android.os.Looper.loop(Looper.java:137)
     	at android.app.ActivityThread.main(ActivityThread.java:5103)
     	at java.lang.reflect.Method.invokeNative(Native Method)
     	at java.lang.reflect.Method.invoke(Method.java:525)
     	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
     	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
     	at dalvik.system.NativeStart.main(Native Method)
        Caused by: java.lang.IndexOutOfBoundsException: Invalid index 0, size is 0
     	at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:255)
     	at java.util.ArrayList.get(ArrayList.java:308)
     	at com.example.get_mobiile_location.MainActivity.getMyLocation(MainActivity.java:79)
     	at com.example.get_mobiile_location.MainActivity.onCreate(MainActivity.java:53)
     	at android.app.Activity.performCreate(Activity.java:5133)
     	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
     	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
     	... 11 more

请检查我做错了什么。

Answer 1

基于日志

java.lang.IndexOutOfBoundsException: Invalid index 0, size is 0

在下一行中，您将获得给定经纬度值的 0 个地址

List<Address> addresses = geocoder.getFromLocation(37.423247,-122.085469, 1);

因此，为了避免崩溃，请按如下方式在从中访问数据之前检查条件

if(addresses != null&&addresses.size()>0) {
  //fetch data from addresses
}else{
        //display Toast message
     }

更新:

如果您忘记了任何人，请添加以下权限

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<permission android:name="com.example.permission.MAPS_RECEIVE" android:protectionLevel="signature"/>
<uses-permission android:name="android.permission.INTERNET" />

引用以下教程

http://karanbalkar.com/2013/11/tutorial-63-implement-reverse-geocoding-in-android/

希望对您有所帮助。