Java tutorial
/* Copyright (c) 2010 Google Inc. * * 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.BeatYourRecord; import java.util.Date; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; import android.app.Notification; import android.app.NotificationManager; import android.app.PendingIntent; import android.app.Service; import android.content.Intent; import android.os.Handler; import android.os.IBinder; import android.os.Message; import android.util.Log; import com.BeatYourRecord.db.Assignment; import com.BeatYourRecord.db.DbHelper; public class AssignmentSyncService extends Service { private static final String LOG_TAG = AssignmentSyncService.class.getSimpleName(); private DbHelper dbHelper = null; private String ytdDomain = null; private String ytdJsonRpcUrl = null; private boolean isRunning = false; @Override public void onCreate() { super.onCreate(); dbHelper = new DbHelper(AssignmentSyncService.this); Log.d(LOG_TAG, "sync service onCreate()!!!"); } @Override public void onDestroy() { super.onDestroy(); Log.d(LOG_TAG, "sync service onDestroy()!!!"); } @Override public IBinder onBind(Intent intent) { return null; } @Override public int onStartCommand(Intent intent, int flags, int startId) { final int startId_ = startId; if (!isRunning) { isRunning = true; } else { Log.d(LOG_TAG, "sync service is already running, stop and return!!!"); // For whatever reason, the previous onStartCommand is still running, // perhaps the service got // killed by runtime and this service is not STICKY, so it never reach end // to call stopSelf? // So just kill it and let another alarm to start it again. stopSelf(startId_); return Service.START_NOT_STICKY; } // Log.d(LOG_TAG, "incoming startId=" + startId_); // Log.d(LOG_TAG, "thread id=" + Thread.currentThread().getId()); // Log.d(LOG_TAG, "thread count=" + // Thread.currentThread().getThreadGroup().activeCount()); if ((flags & Service.START_FLAG_RETRY) == Service.START_FLAG_RETRY) { Log.d(LOG_TAG, "assignment service retry"); } ytdDomain = intent.getStringExtra(DbHelper.YTD_DOMAIN); ytdJsonRpcUrl = "http://" + ytdDomain + "/jsonrpc"; final Handler handler = new Handler() { @Override public void handleMessage(Message msg) { stopSelf(startId_); Log.d(LOG_TAG, "startId=" + startId_ + " is finished."); } }; new Thread() { @Override public void run() { String newAssignmentId = updateAssignmentDb(); if (newAssignmentId != null) { Intent intent = new Intent(); intent.setAction(MainActivity.NEW_ASSIGNMENT_UPDATE); intent.putExtra(DbHelper.YTD_DOMAIN, ytdDomain); intent.putExtra(DbHelper.ASSIGNMENT_ID, newAssignmentId); sendBroadcast(intent); sendNotification(ytdDomain, newAssignmentId); } handler.sendEmptyMessage(0); } }.start(); return Service.START_NOT_STICKY; } public void sendNotification(String ytdDomain, String assignmentId) { int notificationId = 1; Intent assignmentIntent = new Intent(this, DetailsActivity.class); assignmentIntent.putExtra(DbHelper.YTD_DOMAIN, ytdDomain); assignmentIntent.putExtra(DbHelper.ASSIGNMENT_ID, assignmentId); assignmentIntent.putExtra("notificationId", notificationId); PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, assignmentIntent, PendingIntent.FLAG_UPDATE_CURRENT); NotificationManager nm = (NotificationManager) getSystemService(NOTIFICATION_SERVICE); Notification n = new Notification(R.drawable.icon, "Update from YouTube Direct", System.currentTimeMillis()); n.setLatestEventInfo(getApplicationContext(), "Update from YouTube Direct", "For " + SettingActivity.getYtdDomains(this).get(this.ytdDomain), pendingIntent); n.defaults |= Notification.DEFAULT_LIGHTS; nm.notify(notificationId, n); } public String updateAssignmentDb() { String newAssignmentId = null; String sortBy = "created"; String sortOrder = "desc"; String filterType = "all"; int pageIndex = 1; int pageSize = 30; JSONObject payload = new JSONObject(); try { payload.put("method", "GET_ASSIGNMENTS"); JSONObject params = new JSONObject(); params.put("sortBy", sortBy); params.put("sortOrder", sortOrder); params.put("filterType", filterType); params.put("pageIndex", pageIndex); params.put("pageSize", pageSize); payload.put("params", params); } catch (JSONException e) { e.printStackTrace(); } String jsonRpcUrl = ytdJsonRpcUrl; String json = Util.makeJsonRpcCall(jsonRpcUrl, payload); if (json == null) { Log.d(LOG_TAG, ytdDomain + " jsonrpc request failed"); return null; } // Log.d(LOG_TAG, json); if (json != null) { try { JSONObject jsonObj = new JSONObject(json); JSONArray jsonArray = jsonObj.getJSONArray("result"); for (int i = 0; i < jsonArray.length(); i++) { JSONObject assignmentJson = jsonArray.getJSONObject(i); String assignmentId = assignmentJson.getString("id"); String created = assignmentJson.getString("created"); String updated = assignmentJson.getString("updated"); String description = assignmentJson.getString("description"); String status = assignmentJson.getString("status"); if (description.equals("default mobile assignment")) { continue; } dbHelper = dbHelper.open(); Assignment assignment = dbHelper.getAssignment(ytdDomain, assignmentId); dbHelper.close(); if (assignment == null) { // new entry assignment = new Assignment(ytdDomain, assignmentId); assignment.setStatus(status); assignment.setCreated(new Date(created)); assignment.setUpdated(new Date(updated)); assignment.setDescription(description); dbHelper = dbHelper.open(); long rowId = dbHelper.insertAssignment(assignment); dbHelper.close(); Log.d(LOG_TAG, "db insert id=" + rowId); Log.d(LOG_TAG, "db insert description=" + description); newAssignmentId = assignment.getAssignmentId(); } else { Date newUpdated = new Date(updated); if (newUpdated.getTime() > assignment.getUpdated().getTime()) { assignment.setStatus(status); assignment.setCreated(new Date(created)); assignment.setUpdated(new Date(updated)); assignment.setDescription(description); dbHelper = dbHelper.open(); dbHelper.updateAssignment(ytdDomain, assignmentId, assignment); dbHelper.close(); } } } } catch (JSONException e) { e.printStackTrace(); } } return newAssignmentId; } }