java.lang.IllegalArgumentException:索引59处查询中的非法字符

Question

我在做什么: 我正在尝试在android中进行反向地理编码

我收到错误:: java.lang.IllegalArgumentException:索引59的查询中出现非法字符:http://maps.google.com/maps/api/geocode/json？ address = Agram,Bengaluru,Karnataka,India&sensor = false

注意:该请求在浏览器中获得了json响应,但不是来自我的下面的类

这一行给出了这个错误::

HttpGet httpget = new HttpGet(url);

---

JSONfunctions.java

public class JSONfunctions {

    public static JSONObject getJSONfromURL(String url) {
        InputStream is = null;
        String result = "";
        JSONObject jArray = null;

        // Download JSON data from URL
        try {
            HttpClient httpclient = new DefaultHttpClient();
            HttpGet httpget = new HttpGet(url);

            HttpResponse response = httpclient.execute(httpget);
            HttpEntity entity = response.getEntity();
            is = entity.getContent();

        } catch (Exception e) {
            Log.e("log_tag", "Error in http connection " + e.toString());
        }

        // Convert response to string
        try {
            BufferedReader reader = new BufferedReader(new InputStreamReader(
                    is, "iso-8859-1"), 8);
            StringBuilder sb = new StringBuilder();
            String line = null;
            while ((line = reader.readLine()) != null) {
                sb.append(line + "\n");
            }
            is.close();
            result = sb.toString();
        } catch (Exception e) {
            Log.e("log_tag", "Error converting result " + e.toString());
        }

        try {

            jArray = new JSONObject(result);
        } catch (JSONException e) {
            Log.e("log_tag", "Error parsing data " + e.toString());
        }

        return jArray;
    }
}

Answer 1

用于在将参数URLEncoder.encode()值放入URL字符串之前对其进行编码,使其变为类似的值address"Agram, Bengaluru, Karnataka, India"

http://maps.google.com/maps/api/geocode/json?address=Agram,+Bengaluru,+Karnataka,+India&sensor=false

即空格变为+和其他特殊八位字节表示为%xx.

浏览器会自动对地址栏中输入的字符串进行智能URL编码,这就是它在那里工作的原因.

Answer 2

建立你的网址,如,

final StringBuilder request = new StringBuilder(
        "http://maps.googleapis.com/maps/api/geocode/json?sensor=false");
request.append("&language=").append(Locale.getDefault().getLanguage());
request.append("&address=").append(
        URLEncoder.encode(locationName, "UTF-8"));