使用json而不是Geocoder从谷歌地图获取位置地址

Question

我正在谷歌地图上开发一个应用程序。我是使用谷歌地图 API V2 的新手。我想单击地图上的位置并获取该位置的地址，我使用 Geocoder，它适用于我，但在不同版本的 android 上它不起作用，所以我想使用 json 任何人帮助我..
Mainactivity.java

@Override
    public void onMapLongClick(LatLng point) {

        lat = point.latitude;
        lng = point.longitude;


         try {
           Geocoder geocoder = new Geocoder(this, Locale.getDefault());
           List<Address> addresses = geocoder.getFromLocation(lat, lng, 1);
           StringBuilder sb = new StringBuilder();
           if (addresses.size() > 0) {
             Address address = addresses.get(0);

             sb.append(address.getCountryName()).append(", ");
             sb.append(address.getLocality()).append(", ");
             sb.append(address.getSubLocality()).append("\n");
             sb.append(address.getFeatureName()).append(", ");
             sb.append(address.getPostalCode()).append(", ");
             sb.append(address.getAdminArea()).append(", ");
             sb.append(address.getPhone()).append("");

           }
           addressString = sb.toString();
           mTapTextView.setText(addressString);

          } catch (IOException e) {}
    }      

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.googlemaps"
    android:versionCode="1"
    android:versionName="1.0" >

    <permission
        android:name="com.example.googlemaps.permission.MAPS_RECEIVE"
        android:protectionLevel="signature" />

    <uses-permission android:name="com.example.googlemaps.permission.MAPS_RECEIVE" />
    <uses-permission android:name="android.permission.CAMERA" />
     <uses-feature android:name="android.hardware.camera" />

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="19" />

    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

    <!-- Required to show current location -->
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

    <!-- Required OpenGL ES 2.0. for Maps V2 -->
    <uses-feature
        android:glEsVersion="0x00020000"
        android:required="true" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.googlemaps.Main"
            android:label="@string/app_name"
            android:screenOrientation="portrait"
            android:theme="@android:style/Theme.NoTitleBar.Fullscreen" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <meta-data
            android:name="com.google.android.maps.v2.API_KEY"
            android:value="AIzaSyC9yx6mNQGAIQv9GNAPIMXRYaxWhWwMJ2c" />
        <meta-data
            android:name="com.google.android.gms.version"
            android:value="@integer/google_play_services_version" />

        <activity
            android:name="com.example.googlemaps.ShowDirection"
            android:label="@string/title_activity_show_direction" 
            android:screenOrientation="portrait"
            android:theme="@android:style/Theme.NoTitleBar.Fullscreen">
        </activity>
    </application>

</manifest>

Answer 1

使用Google GeocodingAPI

反向地理编码可以通过在HTTP GET方法中提供APIKEY、经纬度坐标来实现，可以直接得到json响应格式的结果

https://maps.googleapis.com/maps/api/geocode/json?latlng=

Answer 2

试试下面的代码：

public static JSONObject getLocationInfo(double lat, double lng) {

HttpGet httpGet = new HttpGet("http://maps.googleapis.com/maps/api/geocode/json?latlng="+ lat+","+lng +"&sensor=true");
HttpClient client = new DefaultHttpClient();
HttpResponse response;
StringBuilder stringBuilder = new StringBuilder();

try {
    response = client.execute(httpGet);
    HttpEntity entity = response.getEntity();
    InputStream stream = entity.getContent();
    int b;
    while ((b = stream.read()) != -1) {
        stringBuilder.append((char) b);
    }
} catch (ClientProtocolException e) {
} catch (IOException e) {
}

JSONObject jsonObject = new JSONObject();
try {
    jsonObject = new JSONObject(stringBuilder.toString());
} catch (JSONException e) {
    e.printStackTrace();
}

return jsonObject;
}

public static String getLoc(double lat, double lng) {
JSONObject jsonObj = getLocationInfo(lat, lng);
Log.i("JSON string =>", jsonObj.toString());

String currentLocation = "testing";
String street_address = null;
String postal_code = null; 

try {
    String status = jsonObj.getString("status").toString();
    Log.i("status", status);

    if(status.equalsIgnoreCase("OK")){
        JSONArray results = jsonObj.getJSONArray("results");
        int i = 0;
        Log.i("i", i+ "," + results.length() ); //TODO delete this
        do{

            JSONObject r = results.getJSONObject(i);
            JSONArray typesArray = r.getJSONArray("types");
            String types = typesArray.getString(0);

            if(types.equalsIgnoreCase("street_address")){
                street_address = r.getString("formatted_address").split(",")[0];
                Log.i("street_address", street_address);
            }else if(types.equalsIgnoreCase("postal_code")){
                postal_code = r.getString("formatted_address");
                Log.i("postal_code", postal_code);
            }

            if(street_address!=null && postal_code!=null){
                currentLocation = street_address + "," + postal_code;
                Log.i("Current Location =>", currentLocation); //Delete this
                i = results.length();
            }

            i++;
        }while(i<results.length());

        Log.i("JSON Geo Locatoin =>", currentLocation);
        return currentLocation;
    }

} catch (JSONException e) {
    Log.e("testing","Failed to load JSON");
    e.printStackTrace();
}
return null;
}

和访问：

String currentLocation = getLoc(lat, lng);

并在清单文件中添加以下权限：

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"></uses-permission>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"></uses-permission>