Http GET在android中的请求错误
问题描述:
我想从android的http获取请求获取响应,而不使用地图活动,只发送url请求以获取对字符串的响应。Http GET在android中的请求错误
的URL得到的响应: https://maps.googleapis.com/maps/api/distancematrix/json?origins=ashdod&destinations=yavne&key
,我试图代码:
HttpURLConnection urlConnection= null;
URL url = null;
String response = "";
try {
url = new URL(urlString.toString());
urlConnection=(HttpURLConnection)url.openConnection();
urlConnection.setRequestMethod("GET");
urlConnection.setDoOutput(true);
urlConnection.setDoInput(true);
urlConnection.connect();
InputStream inStream = null;
inStream = urlConnection.getInputStream();
BufferedReader bReader = new BufferedReader(new InputStreamReader(inStream));
String temp = "";
while((temp = bReader.readLine()) != null){
//Parse data
response += temp;
}
bReader.close();
inStream.close();
urlConnection.disconnect();
} catch (Exception e) {
e.printStackTrace();
}
try {
JSONObject Jresponse = new JSONObject(response.toString());
JSONArray rows = Jresponse.getJSONArray("rows");
JSONObject rows_obj = (JSONObject) rows.get(0);
JSONArray elems = rows_obj.getJSONArray("elements");
JSONObject elems_obj = (JSONObject) elems.get(0);
JSONObject dist = (JSONObject) elems_obj.get("distance");
JSONObject dur = (JSONObject) elems_obj.get("duration");
finalDistance = dist.getInt("value");
finalDuration = dist.getInt("value");
} catch (JSONException e) {
e.printStackTrace();
}
}
的问题是,当它到达连接,它是抛出异常。
P.S.这是我第一次与机器人,所以请与我友善。
答
在做GET请求时,不需要输出。
只是删除这一行:
urlConnection.setDoOutput(true);
,或者你可以简单地改变urlConnection.setDoOutput(true)
到urlConnection.setDoOutput(false)
除此之外,你也应该改变这部分代码,以防止出现乱码代码:
BufferedReader bufferedReader =
new BufferedReader(new InputStreamReader(inStream, StandardCharsets.UTF_8));
您可以添加异常堆栈跟踪 – bmavus
和异常类 – maslan