Java tutorial
// Raspberry LEDs is an application to remotely control Raspberry Pi LEDs connected to the GPIO. // Copyright (C) 2013 Adrin Romero Corchado. // // This file is part of Web Common // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. package com.adr.raspberryleds; import java.io.IOException; import org.json.JSONException; import org.json.JSONObject; import android.content.Context; import android.os.AsyncTask; import android.util.Log; public class LedActivate extends AsyncTask<Void, Void, JSONObject> { private String url; private LedCommand ledc; public LedActivate(String url, LedCommand ledc) { this.url = url; this.ledc = ledc; } @Override protected JSONObject doInBackground(Void... params) { JSONObject query = new JSONObject(); try { for (String led : ledc.getLeds()) { query.put(led, ledc.getCommand()); } return HTTPUtils.execPOST(url, query); } catch (JSONException e) { return null; // never reached. } catch (IOException e) { Log.d("com.adr.raspberryleds.LedActivate", null, e); try { query.put("exception", e.getMessage()); } catch (JSONException e1) { return null; // never reached. } return query; } } }