在我的Android应用程序中,用户可以选择他想要查看的地方的类别(咖啡馆,餐馆……).
当我使用以下网址时,我从google-places-api获得带有next_page_token的结果：
https://maps.googleapis.com/maps/api/place/textsearch/json?query=cafe+in+Elfde-Liniestraat%2C+Hasselt%2C+Belgium&pagetoken=ClRHAAAAqYa7ipwMQH3q1DyinfsMnkuOaZg8wQrp0pvzarv13pwqruqT2YfaEry6v_d-L4d_TC13G6iHuPz-rc1KbI6XRE01rB5CuXcHISu-CI_CaKESEMUxSjHhHDNee4xbr2tPEZcaFPvO6xlRDjs-5AixyD9vamWwTglu&sensor=true&key=或者这个网址：
https://maps.googleapis.com/maps/api/place/textsearch/json?pagetoken=ClRHAAAAqYa7ipwMQH3q1DyinfsMnkuOaZg8wQrp0pvzarv13pwqruqT2YfaEry6v_d-L4d_TC13G6iHuPz-rc1KbI6XRE01rB5CuXcHISu-CI_CaKESEMUxSjHhHDNee4xbr2tPEZcaFPvO6xlRDjs-5AixyD9vamWwTglu&sensor=true&key=我收到了INVALID_REQUEST.
@Override
protected ArrayListarams) {
// When more then one category is selected,this character needs to be after it.
final String DELIMITINGCHaraCTER = "|";
// Add all the categories to a variable to put later on in the URL.
String myTypes = "";
for (String category : params){
// A category must be lowercase letters only.
category = category.toLowerCase();
// A category may not display a whitespace.
// The whitespace(s) must be replaced with a '_'.
category = category.replaceAll(" ","_");
myTypes += category + DELIMITINGCHaraCTER;
}
// Delete if the string ends with the delimitingcharachter the delimitingcharacter!
if (myTypes.endsWith("|")){
myTypes = myTypes.substring(0,myTypes.length() - 1);
}
ArrayListetoken=" + urlToken));
}
}
Log.d("MainActivity","size of myJsonString " + String.valueOf(myJsonString.size()));
for (String jsonString : myJsonString){
Log.d("MainActivity",jsonString);
// Turn String into a JSON Object.
JSONObject jsonPredictionsObject = new JSONObject(jsonString);
// Get a JSON Array that is inside the JSON Object.
JSONArray jsonPredictionsArray = jsonPredictionsObject.getJSONArray("results");
for (int i = 0; i < jsonPredictionsArray.length(); i++){
jsonPredictionsObject = (JSONObject) jsonPredictionsArray.get(i);
final String name = jsonPredictionsObject.getString("name");
final String vicinity = jsonPredictionsObject.optString("vicinity").compareto("") != 0 ? jsonPredictionsObject.optString("vicinity") : jsonPredictionsObject.optString("formatted_address");
final JSONObject geometryObject = jsonPredictionsObject.getJSONObject("geometry");
final JSONObject locationObject = geometryObject.getJSONObject("location");
final JSONArray typesArray = jsonPredictionsObject.getJSONArray("types");
final double latitude = locationObject.getDouble("lat");
final double longitude = locationObject.getDouble("lng");
String types = "";
for (int t = 0; t < typesArray.length(); t++){
String type = typesArray.getString(t);
type = type.toLowerCase();
type = type.replaceAll("_"," ");
types += type + " - ";
}
types = types.substring(0,types.length() - 2);
myPointsOfInterest.add(String.valueOf(latitude) + DELIMITINGCHaraCTER +
String.valueOf(longitude) + DELIMITINGCHaraCTER + types +
DELIMITINGCHaraCTER + name + DELIMITINGCHaraCTER + vicinity);
}
}
}
catch (IOException e){
Log.e("Search points of interest","GetPointsOfinterest: doInBackGround",e);
}
catch (JSONException e){
Log.e("Search points of interest",e);
}
return myPointsOfInterest;
}
public String getDataOfUrl(String urlString,String urlData,String urlApi,String urlToken){
try{
URL myURL;
if (urlToken == null) {
myURL = new URL("https://" + urlString + urlData + urlApi);
}
else {
Log.d("URL INPUT","https://" + urlString + urlData + urlToken + urlApi);
myURL = new URL("https://" + urlString + urlData + urlToken + urlApi);
}
URLConnection myURLConnection = myURL.openConnection();
BufferedReader myBufferReader = new BufferedReader(new InputStreamReader(myURLConnection.getInputStream()));
String strLine;
StringBuffer strBuffer = new StringBuffer();
// Take Google's legible JSON and turn it into on big String.
while((strLine = myBufferReader.readLine()) != null){
strBuffer.append(strLine);
}
Log.d("URL OUTPUT",strBuffer.toString());
return strBuffer.toString();
}
catch (IOException e){
Log.e("getDataOfUrl","Error: ",e);
}
return null;
}
这是logcat的输出：
11-03 14:47:13.832: D/URL OUTPUT(19532): { "html_attributions" : [],"next_page_token" : "ClRHAAAAqYa7ipwMQH3q1DyinfsMnkuOaZg8wQrp0pvzarv13pwqruqT2YfaEry6v_d-L4d_TC13G6iHuPz-rc1KbI6XRE01rB5CuXcHISu-CI_CaKESEMUxSjHhHDNee4xbr2tPEZcaFPvO6xlRDjs-5AixyD9vamWwTglu","results" : [ { "formatted_address" : "Meldertstraat 42,Hasselt,België","geometry" : { "location" : { "lat" : 50.9311660,"lng" : 5.3423240 } },"icon" : "http://maps.gstatic.com/mapfiles/place_api/icons/cafe-71.png","id" : "e6ba73e5b439dddb83aaefc94c71954da0cb0268","name" : "Café Café","rating" : 4.40,"reference" : "CnRpAAAAdVZpUI4NKwsAiQTOjbYG9psNbU7awZkS6_8Ee4r3AvCKhpqWeiDqdof7zYmoUZWKj0A8rOwtncSa1YFVNNo6RxFmmHvuNdWCaucTqkuSSDw8E2o0pf5E6EiMj-7-Hd5xBzDtC0j9d5lLcVWW3AQy1xiqrwgfWwrZkyK65blCeGqhFhoUB9kTW5QVD9sNNuF75MvVewYTcxA","types" : [ "cafe","food","establishment" ] },{ "formatted_address" : "Kempischesteenweg 27,"geometry" : { "location" : { "lat" : 50.9350770,"lng" : 5.3397760 } },"id" : "dc66d311b3c4f5d1a87d5959dfdbc7616ad10b24","name" : "Oberonn","opening_hours" : { "open_Now" : true },"reference" : "CnRlAAAA5q-rz_aOTWsFGQIJz_6zyLbXIczXOTq4PVFxniOjxsCwnw7uIfY8tu7Jk-QbJ-arMWgdClnSpX28q2SqxD8021LGWcaf4Sgo9MaXWpoD6c4TSagyVO9_l_HUXgMoOFJzhHG_NH6z-t1DPxT1zD19PhIQ2gBP9cLazKeB96ZDTpFdsxoUVGB2Ddhrq6JUoTJgrHGL-SINowk",{ "formatted_address" : "Willekensmolenstraat 41,"geometry" : { "location" : { "lat" : 50.9316830,"lng" : 5.3470750 } },"id" : "04937541c2bf71ebec7ac13d506dbbd2727e1ce3","name" : "Den DrosSAErd","reference" : "CnRqAAAA0cPmuMx0_J4x-o-yn0oT1D3kD-IHYAQPotAPPeDD3DWh2FXkD89kCsYoUGDLBlH2mKY6ju18JyCHvc4W_izLcd6TUOIoXrbUCyrtxOL4sTAFb41kH1aFT4dobgvigYrGIcV8Qbzq-K4YGL3t7pnf1hIQKmUp-LLqtGHb4waYi2nq8hoU3VgwykpytoSUUPe2Ue1HmPrMRtE",{ "formatted_address" : "Leopoldplein 1,"geometry" : { "location" : { "lat" : 50.9275810,"lng" : 5.3363830 } },"icon" : "http://maps.gstatic.com/mapfiles/place_api/icons/lodging-71.png","id" : "cc30d6f4e6b0db1ed6dfd17bac118bbf78f194ae","name" : "Century (Hotel)","rating" : 3.80,"reference" : "CnRsAAAAfw4ucOBllDjMCtRU9epYQelpKHRx3u8JR8jr4I5jFzJsktNn3Un-3LjKKWtXCk3Unofi_6RhPFw9Tp8VU_Z7i-WOa00P-pirtCDjQPxg7sp470Mgh6_6PQspGG39H3k-VIMuUz9HWmoP3sPjump6SRIQTp1LZghfi-_HVaMfQArGPxoU-6ogK2IGMiueMEXP9mFiHlGJmo8","types" : [ "lodging",{ "formatted_address" : "Maastrichterstraat 30,"geometry" : { "location" : { "lat" : 50.9295410,"lng" : 5.3391230 } },"id" : "352f9da4642588aba419353487b210baeb30ddd3","name" : "In De Kleine Hal","reference" : "CnRuAAAAAlnMpdiL4Kluiw1T0-QgKWFv9wwWvrSY4w-B7SLI7gvpqT0FYaMTl6DhxncPLqRyxOTWxw3DP3r1XvNHDKXnAb3eRM-gZYwIqbvzVq62zEZgGw0usQgf48mAWOrDpegdNLnEFRYkIduRwlDMDyIOyBIQlDs9BozH4m_gE-dZKZf7yxoUqw0H_HT_IQnLaVm0YwG1QV7o3kg",{ "formatted_address" : "Fruitmarkt 32,"geometry" : { "location" : { "lat" : 50.9299760,"lng" : 5.3393550 } },"icon" : "http://maps.gstatic.com/mapfiles
11-03 14:47:13.864: D/URL INPUT(19532): https://maps.googleapis.com/maps/api/place/textsearch/json?query=cafe+in+Elfde-Liniestraat%2C+Hasselt%2C+Belgium&pagetoken=ClRHAAAAqYa7ipwMQH3q1DyinfsMnkuOaZg8wQrp0pvzarv13pwqruqT2YfaEry6v_d-L4d_TC13G6iHuPz-rc1KbI6XRE01rB5CuXcHISu-CI_CaKESEMUxSjHhHDNee4xbr2tPEZcaFPvO6xlRDjs-5AixyD9vamWwTglu&sensor=true&key=PS：当我在我的浏览器中使用代码时(使用next_page_token)两种方式都是正确的,只有我的Android应用程序才能获得有效数据.是的我有一个API密钥,但是我从代码和我的logcat输出中删除了它.
谁知道我在这里做错了什么？
编辑
当我在Android中硬编码我的网址(带有next-page-token),然后让它运行.我得到了我期望的数据,因此没有返回Invalid_Request.问题在于构建Android中的URL或URL类的使用.
最佳答案
