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我想使用 Google Directions API 从我的 Android 应用程序中的路线获取 JSON 信息。但我总是得到“NOT_FOUND”作为状态码。如果我在浏览器中输入与我的请求相同的 URL，它就可以正常工作。

这是我在 AsyncTask 中的代码：

    @Override
    protected String doInBackground(final String... params) {
        String startAddress = params[0];
        String finishAddress = params[1];
        departureTime = params[2];
        String travelMode = params[3];


        String result = "";
        String url = "http://maps.googleapis.com/maps/api/directions/json?origin=" + startAddress
                + "&destination=" + finishAddress + "&departure_time=" + departureTime + "&mode=" + travelMode + "&sensor=true";
        url = url.trim().replace(' ', '+');

        Log.d(TAG, "URL String: " + url);

        try {
            URL urlObject = new URL(url);
            URLConnection urlConn = urlObject.openConnection();

            BufferedReader in = new BufferedReader( new InputStreamReader(urlConn.getInputStream()));

            String inputLine;
            while ((inputLine = in.readLine()) != null){
                result = result + inputLine;
            }
            in.close();

            return result;
        } catch (Exception e) {
            exception = e.toString();
            Log.e(TAG, "Exception getting route from Google Directions API: " + e.toString());
            Logger.e(context, TAG, "Exception getting route from Google Directions API: " + e.toString());
            return null;
        }
    }

输出如下所示：

02-23 08:54:01.811  25055-25055/de.bmw.ceprouteguide D/PlanRouteActivity﹕ startAddress: Hanauer Straße 46, München, endAddress: Westendstraße 11, München, travelMode: transit, date: 23-02-2015, time: 08:54
02-23 08:54:01.812  25055-25055/de.bmw.ceprouteguide D/PlanRouteActivity﹕ Millis since epoch:1424678040, date string: 23-02-2015 08:54
02-23 08:54:01.816  25055-25618/de.bmw.ceprouteguide D/PlanRouteActivity﹕ URL String: http://maps.googleapis.com/maps/api/directions/json?origin=Hanauer+Straße+46,+München&destination=Westendstraße+11,+München&departure_time=1424678040&mode=transit&sensor=true
02-23 08:54:02.116  25055-25055/de.bmw.ceprouteguide D/PlanRouteActivity﹕ Route: {   "routes" : [],   "status" : "NOT_FOUND"}
02-23 08:54:02.117  25055-25055/de.bmw.ceprouteguide D/PlanRouteActivity﹕ Google Directions status code: NOT_FOUND

有人知道问题出在哪里吗？

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1 回答 1

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如果您有 API 密钥，则必须从https://console.developers.google.com启用 API

  1. 谷歌地图方向 API
  2. 谷歌地图 Android API

如果没有创建凭据来访问您的启用 API。

等待 10 分钟，然后重试。

于 2017-03-14T06:48:00.597 回答