I am coding my first Android application and I just started to work with JSON. I need to transfer username and password using JSON to the router and get response from the router. But, I cannot figure out how to make JSON call to the router. My JSON string is made of a JSON object, an Array and an object again and I don't know how to make a JSON call to the router to transfer this complex JSON. I am using Jackson.2.2.2 library. So, my question is, how to make a JSON call to the router to transfer this complex JSON string.
Below is my JSON string:
{ "jsonrpc": "2.0", "id": 1, "method": "call", "params": [ "00000000000000000000000000000000", "session", "login", { "username": "uname", "password": "upassword" } ] } http://192.168.1.1/ubus
I need to transfer Username and Password.
Adding some of my code below:
RESTRequest.java
public class RESTRequest {
private static final String TAG = JacksonUtil.class.getSimpleName();
static String response = null;
public final static int GET = 1;
public final static int POST = 2;
//Constructor with no parameter
public RESTRequest(){
}
/**
* Making web service call
*/
public String makeWebServiceCall(String url, int requestmethod){
return this.makeWebServiceCall(url, requestmethod, null);
}
/**
* Making service call
*/
public String makeWebServiceCall(String urladdress, int requestmethod, HashMap<String, String> params){
URL url;
String responce = "";
try {
url = new URL(urladdress);
HttpURLConnection urlconn = (HttpURLConnection) url.openConnection();
urlconn.setReadTimeout(15000);
urlconn.setConnectTimeout(15000);
urlconn.setDoInput(true);
urlconn.setDoOutput(true);
if(requestmethod == POST){
urlconn.setRequestMethod("POST");
}else if(requestmethod == GET){
urlconn.setRequestMethod("GET");
}
if(params != null){
OutputStream outputstream = urlconn.getOutputStream();
BufferedWriter bufferedWriter = new BufferedWriter(
new OutputStreamWriter(outputstream, "UTF-8"));
StringBuilder result = new StringBuilder();
boolean first = true;
for(Map.Entry<String, String> entry : params.entrySet()){
if (first)
first = false;
else
result.append("&");
result.append(URLEncoder.encode(entry.getKey(), "UTF-8"));
result.append("=");
result.append(URLEncoder.encode(entry.getValue(), "UTF-8"));
}
bufferedWriter.write(result.toString());
bufferedWriter.flush();
bufferedWriter.close();
outputstream.close();
}
int responceCode = urlconn.getResponseCode();
if(responceCode == HttpsURLConnection.HTTP_OK){
String line;
BufferedReader br = new BufferedReader(new InputStreamReader(urlconn.getInputStream()));
while ((line = br.readLine()) != null){
responce += line;
}
}else {
responce = "";
}
} catch (Exception e){
Log.e(TAG, "IOException parsing to json", e);
}
return response;
}
JacksonUtil
public class JacksonUtil {
private static final String TAG = JacksonUtil.class.getSimpleName();
private static ObjectMapper mapper;
private static TypeFactory factory;
private JacksonUtil() {
}
private static ObjectMapper getMapper() {
if (mapper == null) {
mapper = new ObjectMapper();
mapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);
factory = mapper.getTypeFactory();
mapper.registerModule(new JodaModule());
mapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
mapper.setSerializationInclusion(JsonInclude.Include.NON_EMPTY);
}
return mapper;
}
public static <T> String fromObject(T object) {
try {
return getMapper().writeValueAsString(object);
} catch (IOException e) {
Log.e(TAG, "IOException parsing to json", e);
} /*catch (Exception e) {
Log.e(App.class.getSimpleName(), "Exception", e);
Log.e("JacksonUtil", "FromObject");
}*/
return null;
}
public static <T> T toObject(InputStream is, Class<T> o) {
try {
return getMapper().readValue(is, o);
} catch (IOException e) {
Log.e(TAG, "IOException parsing from json", e);
} catch (Exception e) {
Log.e(TAG, "Exception parsing from json", e);
}
return null;
}
public static <T> T toObject(String json, Class<T> o) {
if (json == null) {
return null;
}
try {
return getMapper().readValue(json, o);
} catch (IOException e) {
Log.e(TAG, "IOException parsing from json", e);
} catch (Exception e) {
Log.e(TAG, "Exception parsing from json", e);
}
return null;
}
public static <T> T toObject(String json, TypeReference<T> type) {
try {
return getMapper().readValue(json, type);
} catch (IOException e) {
Log.e(TAG, "IOException parsing from json", e);
} catch (Exception e) {
Log.e(TAG, "Exception parsing from json", e);
}
return null;
}
public static <T> T toCollection(String json, Class<? extends Collection> list, Class types) {
try {
return getMapper().readValue(json, factory.constructCollectionType(list, types));
} catch (IOException e) {
Log.e(TAG, "IOException parsing from json", e);
} catch (Exception e) {
Log.e(TAG, "Exception parsing from json", e);
}
return null;
}
public static <T> T toCollection(InputStream is, Class<? extends Collection> list, Class types) throws Exception {
return getMapper().readValue(is, factory.constructCollectionType(list, types));
}
Related
I'm programming an app that calculates, in route, two locations. I've implemented the google places API to get the lat/lon based on name or address but I can't implement the Distance API. The classes/methods don't appear when I try to import. Below is an example of what I'm trying to do.
private static final String API_KEY = "YOUR_API_KEY";
private static final GeoApiContext context = new
GeoApiContext().setApiKey(API_KEY);
public DistanceMatrix estimateRouteTime(DateTime time, Boolean isForCalculateArrivalTime, DirectionsApi.RouteRestriction routeRestriction, LatLng departure, LatLng... arrivals) {
try {
DistanceMatrixApiRequest req = DistanceMatrixApi.newRequest(context);
if (isForCalculateArrivalTime) {
req.departureTime(time);
} else {
req.arrivalTime(time);
}
if (routeRestriction == null) {
routeRestriction = DirectionsApi.RouteRestriction.TOLLS;
}
DistanceMatrix trix = req.origins(departure)
.destinations(arrivals)
.mode(TravelMode.DRIVING)
.avoid(routeRestriction)
.language("fr-FR")
.await();
return trix;
} catch (ApiException e) {
System.out.println(e.getMessage());
} catch (Exception e) {
System.out.println(e.getMessage());
}
return null;
}
The GeoApiContext and DistanceMatrix don't appear at import.
Tks for help.
Answering my question...
public class GetJson extends AsyncTask<Void, Void, DeliveryData> {
#Override
protected void onPreExecute() {
// progressDialog
}
#Override
protected DeliveryData doInBackground(Void... params) {
Utils util = new Utils();
DeliveryData json = util.getInfo("https://maps.googleapis.com/maps/api/distancematrix/json?units=metric&origins="+latLngCompany.latitude+","+latLngCompany.longitude+
"&destinations="+latPlace+","+lonPlace+"&key=" + APISERVERKEY);
deliveryData.saveDeliveryData();
return json;
}
#Override
protected void onPostExecute(DeliveryData deliveryData) {
//progressDialog.dismiss
}
}
Created a AsyncTask to get json from url with the especifics parameters.
public class Utils {
public DeliveryData getInfo(String end){
String json;
DeliveryData output;
json = NetworkUtils.getJSONFromAPI(end);
output = parseJson(json);
return output;
}
private DeliveryData parseJson(String json){
try {
DeliveryData deliveryData = new DeliveryData();
JSONObject distanceJson = new JSONObject(json)
.getJSONArray("rows")
.getJSONObject(0)
.getJSONArray("elements")
.getJSONObject(0)
.getJSONObject("distance");
Double distanceDouble = null ;
String distance = distanceJson.get("text").toString();
if (distance.contains("km")){
distanceDouble = Double.parseDouble(distance.replace("km", ""));
}else {
distanceDouble = Double.parseDouble("0." + distance.replace("m", ""));
}
deliveryData.setDistance(distanceDouble);
return deliveryData;
}catch (JSONException e){
e.printStackTrace();
return null;
}
}
}
At getInfo, the data from url is passed to string. Then, parseJson is call to transform the string to JsonObject.
My Json there is only one position. So, the object is selected at array and the String is parse to Double, excluding the chars. In the end, the distance is saved at object.
public class NetworkUtils {
public static String getJSONFromAPI (String url){
String output = "";
try {
URL apiEnd = new URL(url);
int responseCode;
HttpURLConnection connection;
InputStream is;
connection = (HttpURLConnection) apiEnd.openConnection();
connection.setRequestMethod("GET");
connection.setReadTimeout(15000);
connection.setConnectTimeout(15000);
connection.connect();
responseCode = connection.getResponseCode();
if(responseCode < HttpURLConnection.HTTP_BAD_REQUEST){
is = connection.getInputStream();
}else {
is = connection.getErrorStream();
}
output = convertISToString(is);
is.close();
connection.disconnect();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (ProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return output;
}
private static String convertISToString(InputStream is){
StringBuffer buffer = new StringBuffer();
try {
BufferedReader br;
String row;
br = new BufferedReader(new InputStreamReader(is));
while ((row = br.readLine())!= null){
buffer.append(row);
}
br.close();
} catch (IOException e) {
e.printStackTrace();
}
return buffer.toString();
}
}
This class is resposible for connecting to server and get the data from url.
I am having an error in the method that retrieves the JSONObject and converts it to a string, the error says "!DOCTYPE of type java.lang.String cannot be converted to JSONObject"
public class FindSentimentTask extends AsyncTask<String, Void, String> {
#Override
protected String doInBackground(String... url) {
String toReturn= "DID NOT WORK";
try
{
toReturn=getResponseFromHttpUrl(url[0]);
}catch (Exception e)
{
Log.d("ErrorInApp","exception on get Response from HTTP call" + e.getMessage());
return toReturn;
}
return toReturn;
}
protected void onPostExecute(String sentimentData) {
try {
JSONObject sentimentJSON = new JSONObject(sentimentData);
((TextView)findViewById(R.id.output)).setText(sentimentJSON.toString());
//String testOutput = sentimentJSON.get("docs").toString();
//((TextView)findViewById(R.id.output)).setText(testOutput.toString());
} catch (Exception e) {
Log.d("ErrorInApp","exception in onPostExecute" + e.getMessage());
}
}
}
public static String getResponseFromHttpUrl(String url) throws IOException {
URL theURL = new URL(url);
HttpURLConnection urlConnection = (HttpURLConnection) theURL.openConnection();
try {
InputStream in = urlConnection.getInputStream();
Scanner scanner = new Scanner(in);
scanner.useDelimiter("\\A");
boolean hasInput = scanner.hasNext();
if (hasInput) {
return scanner.next();
} else {
return null;
}
} finally {
urlConnection.disconnect();
}
}
More specificaly the error is here where I retrieve the JSONObject and turn it into a string to display in a TextView
protected void onPostExecute(String sentimentData) {
try {
JSONObject sentimentJSON = new JSONObject(sentimentData);
((TextView)findViewById(R.id.output)).setText(sentimentJSON.toString());
} catch (Exception e) {
Log.d("ErrorInApp","exception in onPostExecute" + e.getMessage());
}
}
The API I am using is https://developer.nytimes.com/article_search_v2.json
Hello I'm trying to use this endpoint www.reddit.com/reddits.json to show some list on android and I'm getting this error, below is my code.
I have this asynctask class on my main activity class:
private class AsyncListLoader extends AsyncTask<String, Integer, JSONObject>{
private JSONParser jsonParser = new JSONParser();
private static final String REDEEM_URL = "http://www.reddit.com/reddits.json";
private HashMap<String, String> param = new HashMap<>();
#Override
protected JSONObject doInBackground(String... params) {
JSONObject json = jsonParser.makeHttpRequest(REDEEM_URL, "GET", param);
if (json != null) {
Log.d("JSON result", json.toString());
return json;
}
else {
Log.d("JSON result", "is null");
}
return null;
}
#Override
protected void onPostExecute(JSONObject s) {
try {
if(!s.has("kind")){
Toast.makeText(MainActivity.this, "Something went wrong", Toast.LENGTH_LONG).show();
}
else {
JSONObject list = s.getJSONObject("data");
JSONArray childrens = list.getJSONArray("children");
for(int i = 0; i < childrens.length(); i++){
JSONObject o = childrens.getJSONObject(i).getJSONObject("data");
Feed f = new Feed(o.getString("icon_img"),o.getString("banner_img"),o.getString("display_name"));
MainActivity.this.adapter.add(f);
}
}
} catch (JSONException e){
e.printStackTrace();
}
}
}
makehttpRequest when get:
if(method.equals("GET")){
// request method is GET
if (sbParams.length() != 0) {
url += "?" + sbParams.toString();
}
try {
urlObj = new URL(url);
conn = (HttpURLConnection) urlObj.openConnection();
conn.setDoOutput(false);
conn.setRequestMethod("GET");
conn.setRequestProperty("Accept-Charset", charset);
conn.setConnectTimeout(15000);
conn.connect();
} catch (IOException e) {
e.printStackTrace();
}
}
try {
//Receive the response from the server
InputStream in = new BufferedInputStream(conn.getInputStream());
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
result = new StringBuilder();
String line;
while ((line = reader.readLine()) != null) {
result.append(line);
}
Log.d("JSON Parser", "result: " + result.toString());
} catch (IOException e) {
e.printStackTrace();
}
conn.disconnect();
// try parse the string to a JSON object
try {
jObj = new JSONObject(result.toString());
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
}
// return JSON Object
return jObj;
I tested out another json endpoints on the web and they are working. I dont have any idea why is this happening.
EDIT:
No param is being used so the url is fine.
The json is valid, I checked this in differents websites.
Before, i should say, my English is very bad. İm sorry for it.
i parsing wanna Json output, in my android prject. my json file is with url.
it is like there
{
"urun": [
{
"ID": "1011245",
"name": "Jeanne Darc-Elbise-jdje57942xl",
"name_eng": "Jeanne Darc-Dress-jdje57942xl",
"catID": "142",
"tedarikciCode": "jdje57942xl",
"markaID": "30",
"data1": "4",
"resim": "var/30/jdje57942xl/siyah_1_jdje57942xl.jpg",
"resim2": "var/30/jdje57942xl/siyah_2_jdje57942xl.jpg",
"resim3": "var/30/jdje57942xl/siyah_3_jdje57942xl.jpg",
"fiyat": "28",
"ozellik1detay": "44-50"
}
]
}
my parser class is
public class JsonParsers
{
final String TAG = "JsonParsers.java";
static InputStream is =null;
static JSONObject jObj=null;
static String ParserJson=null;
public JsonParsers(String yourJsonStringUrl) {
}
public JsonParsers() {
super();
}
public String getJsonUrl(String url) throws IOException {
try{
DefaultHttpClient httpClient=new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity=httpResponse.getEntity();
is=httpEntity.getContent();
}
catch (UnsupportedEncodingException e)
{
e.printStackTrace();
}
catch (ClientProtocolException e)
{
e.printStackTrace();
}
catch (IOException e)
{
e.printStackTrace();
}
try
{
BufferedReader reader = new BufferedReader(new InputStreamReader(is,"iso-8859-1"),8);
StringBuilder sb= new StringBuilder();
String line = "";
while ((line=reader.readLine())!=null)
{
sb.append(line+"\n");
//Log.e("çıktı:",line);
}
is.close();
ParserJson = sb.toString();
}
catch (Exception e)
{
e.printStackTrace();
}
try {
jObj=new JSONObject(ParserJson);
}
catch (JSONException e) {
e.printStackTrace();
}
return ParserJson;
}
}
My asyncTask Class is
private class AsyncTaskParseJSonIncludes extends AsyncTask<String, String, String> {
final String TAG = "MainActivity.java";
JSONArray dataJsonArr = null;
String ObjectStr;
protected String doInBackground(String... path) {
try{
try{
JsonParsers parser = new JsonParsers();
//Json = parser.getJsonUrl(JsonPath);
ObjectStr=parser.getJsonUrl(JsonPath);
JSONObject Json= new JSONObject(ObjectStr);
dataJsonArr=Json.getJSONArray("urun");
for(int i=0;i<dataJsonArr.length();i++)
{
JSONObject c = dataJsonArr.getJSONObject(i);
// Log.e("Deneme", c.getString("name"));
ID.add(Integer.valueOf(c.getString("ID")));
name.add(c.getString("name"));
name_eng.add(c.getString("name_eng"));
//name_py.add(c.getString("name_py"));
CatID.add(Integer.valueOf(c.getString("CatID")));
tedarikciCode.add(c.getString("tedarikciCode"));
markaID.add(Integer.valueOf(c.getString("markaID")));
data1.add(Integer.valueOf(c.getString("data1")));
resimmmm.add(c.getString("resim"));
resim2.add(c.getString("resim2"));
resim3.add(c.getString("resim3"));
fiyat.add(Integer.valueOf(c.getString("fiyat")));
ozellik1detay.add(c.getString("ozellik1detay"));
// ozellik2detay.add(c.getString("ozellik2detay"));
}
for(int i=0;i<name.size();i++) {
Log.e("Deneme", name.get(i));
}
}
catch (JSONException e)
{
e.printStackTrace();
}
}
catch (IOException e)
{
e.printStackTrace();
}
return null;
}
protected void onPreExecute() {}
/////////////////////////////////////////////////////////
}
it is in normaly working but it is not returned json values.
i check the parser class for stream of data, it is fixed.
But it is only first value returned, other datas don't returned.
i don't understand it logical problem. when someone help me for fix my code i very funny. Thanks.
name_eng.add().
where was the name_eng defined?
CatID to catID.
right:
Try{A}catch{}
Try{B}catch{}
Try{C}catch{}
wrong:
Try{A;B;C}catch{}
Try GsonRequest, it's very simple to parse JSON, nice example of use it you have there: USE GsonRequest
I'm trying to write a reusable asynctask where I define the type of a class that Gson should deserialize to in the asynctask's constructor. Having never worked with Java Generics before, I'm a little lost on how to proceed. I can't figure out the correct syntax for the fromJson method.
The error I receive is
Cannot resolve method'fromJson(java.io.InputStream, java.lang.Class<T>)'
The full AsyncTask...
public class AsyncGet<T> extends AsyncTask<String,String,ApiResponse> {
private String TAG = "AsyncGet";
private HttpURLConnection mConnection;
private IApiCallback mCallback;
private Context mContext;
private Class<T> type;
public AsyncGet(IApiCallback callback, Class<T> classType, Context context) {
this.mCallback = callback;
this.mContext = context;
this.type = classType;
}
#Override
protected ApiResponse doInBackground(String... uri) {
try {
URL url = new URL(uri[0]);
mConnection = (HttpURLConnection) url.openConnection();
mConnection.setConnectTimeout(5000);
mConnection.setReadTimeout(60000);
mConnection.addRequestProperty("Accept-Encoding", "gzip");
mConnection.addRequestProperty("Cache-Control", "no-cache");
mConnection.connect();
String encoding = mConnection.getContentEncoding();
InputStream inStream;
if (encoding != null && encoding.equalsIgnoreCase("gzip")) {
inStream = new GZIPInputStream(mConnection.getInputStream());
} else {
inStream = mConnection.getInputStream();
}
if (inStream != null) {
try {
Gson gson = new Gson();
ApiResponse response = new ApiResponse();
response.data = gson.fromJson(inStream, type); // What is wrong here?
response.responseCode = mConnection.getResponseCode();
response.responseMessage = mConnection.getResponseMessage();
return response;
} catch (Exception e) {
Log.i(TAG, "Exception");
if (e.getMessage() != null) {
Log.e(TAG, e.getMessage());
}
} finally {
inStream.close();
}
}
} catch (SocketTimeoutException e) {
Log.i(TAG, "Socket Timeout occurred");
FileLogger.getFileLogger(mContext).ReportException(TAG + ", SocketTimeoutException ", e);
} catch (MalformedURLException e) {
FileLogger.getFileLogger(mContext).ReportException(TAG + ", MalformedUrlException ", e);
} catch (IOException e) {
Log.i(TAG," IO Exception");
FileLogger.getFileLogger(mContext).ReportException(TAG + ", IOException ", e);
if (e.getMessage() != null) {
Log.i(TAG, e.getMessage());
}
} finally {
mConnection.disconnect();
}
return null;
}
#Override
protected void onPostExecute(ApiResponse response) {
if (!isCancelled())
mCallback.Execute(response);
}
}
The class Gson does not have a method fromJson(..) that expects an InputStream as its first argument. It does, however, have such a method that accepts a Reader. So just wrap your InputStream in a Reader implementation, InputStreamReader to be exact.
response.data = gson.fromJson(new InputStreamReader(inStream), type);
Go through the javadoc before you use a class.