Java tutorial
/* * Copyright 2015 Ludwig Andersson * * This file is part of Thermospy-android. * * Thermospy-android is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * Thermospy-android is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with Thermospy-android. If not, see <http://www.gnu.org/licenses/>. */ package com.luan.thermospy.android.core.rest; import com.android.volley.DefaultRetryPolicy; import com.android.volley.RequestQueue; import com.android.volley.VolleyError; import com.google.gson.Gson; import com.google.gson.GsonBuilder; import com.google.gson.JsonDeserializationContext; import com.google.gson.JsonDeserializer; import com.google.gson.JsonElement; import com.google.gson.JsonIOException; import com.google.gson.JsonParseException; import com.google.gson.JsonSyntaxException; import com.luan.thermospy.android.core.pojo.LogSession; import com.luan.thermospy.android.core.serverrequest.AbstractServerRequest; import com.luan.thermospy.android.core.serverrequest.UrlRequestType; import com.luan.thermospy.android.core.serverrequest.type.PutJsonObject; import com.luan.thermospy.android.core.serverrequest.type.RequestControl; import org.json.JSONException; import org.json.JSONObject; import java.lang.reflect.Type; import java.util.ArrayList; import java.util.Date; import java.util.List; public class StartLogSessionReq implements AbstractServerRequest.ServerRequestListener<JSONObject>, RequestControl { private static final String LOG_TAG = StartLogSessionReq.class.getSimpleName(); private final OnStartLogSessionListener mListener; private LogSession mLogSession; @Override public void request(String ip, int port) { mPutJsonObjectReq.request(ip, port); } @Override public void cancel() { mPutJsonObjectReq.cancel(); } private JSONObject getJsonObject() { List<LogSession> logSessionsList = new ArrayList<LogSession>(); // Creates the json object which will manage the information received GsonBuilder builder = new GsonBuilder(); // Register an adapter to manage the date types as long values builder.registerTypeAdapter(Date.class, new JsonDeserializer<Date>() { public Date deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException { return new Date(json.getAsJsonPrimitive().getAsLong()); } }); Gson gson = builder.create(); try { return new JSONObject(gson.toJson(mLogSession, LogSession.class)); } catch (JSONException | JsonIOException e) { return null; } } public void setLogSession(LogSession logSession) { this.mLogSession = logSession; mPutJsonObjectReq.setJSONObject(getJsonObject()); } public interface OnStartLogSessionListener { void onStartLogSessionRecv(LogSession session); void onStartLogSessionError(); } private final PutJsonObject mPutJsonObjectReq; public StartLogSessionReq(RequestQueue queue, OnStartLogSessionListener listener, LogSession logSession) { mLogSession = logSession; mListener = listener; mPutJsonObjectReq = new PutJsonObject(queue, this, UrlRequestType.START_LOG_SESSION, getJsonObject(), new DefaultRetryPolicy(15000, 1, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT)); } @Override public void onOkResponse(JSONObject response) { GsonBuilder builder = new GsonBuilder(); // Register an adapter to manage the date types as long values builder.registerTypeAdapter(Date.class, new JsonDeserializer<Date>() { public Date deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException { return new Date(json.getAsJsonPrimitive().getAsLong()); } }); Gson gson = builder.create(); try { LogSession logSession = gson.fromJson(response.toString(), LogSession.class); mListener.onStartLogSessionRecv(logSession); } catch (JsonSyntaxException ex) { mListener.onStartLogSessionError(); } } @Override public void onErrorResponse(VolleyError error) { mListener.onStartLogSessionError(); } }