Java tutorial
/** * Copyright 2015 Google Inc. All Rights Reserved. * <p/> * 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 * <p/> * http://www.apache.org/licenses/LICENSE-2.0 * <p/> * 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.android.prachat.gcm; import android.content.Context; import android.content.Intent; import android.os.Bundle; import android.support.v4.content.LocalBroadcastManager; import android.text.TextUtils; import android.util.Log; import android.widget.Toast; import com.google.android.gms.gcm.GcmListenerService; import org.json.JSONException; import org.json.JSONObject; import com.android.prachat.activity.ChatRoomActivity; import com.android.prachat.activity.MainActivity; import com.android.prachat.app.Config; import com.android.prachat.app.MyApplication; import com.android.prachat.model.Message; import com.android.prachat.model.User; public class MyGcmPushReceiver extends GcmListenerService { private static final String TAG = MyGcmPushReceiver.class.getSimpleName(); private NotificationUtils notificationUtils; /** * Called when message is received. * * @param from SenderID of the sender. * @param bundle Data bundle containing message data as key/value pairs. * For Set of keys use data.keySet(). */ @Override public void onMessageReceived(String from, Bundle bundle) { String title = bundle.getString("title"); Boolean isBackground = Boolean.valueOf(bundle.getString("is_background")); String flag = bundle.getString("flag"); String data = bundle.getString("data"); Log.d(TAG, "From: " + from); Log.d(TAG, "title: " + title); Log.d(TAG, "isBackground: " + isBackground); Log.d(TAG, "flag: " + flag); Log.d(TAG, "data: " + data); if (flag == null) return; if (MyApplication.getInstance().getPrefManager().getUser() == null) { // user is not logged in, skipping push notification Log.e(TAG, "user is not logged in, skipping push notification"); return; } if (from.startsWith("/topics/")) { // message received from some topic. } else { // normal downstream message. } switch (Integer.parseInt(flag)) { case Config.PUSH_TYPE_CHATROOM: // push notification belongs to a chat room processChatRoomPush(title, isBackground, data); break; case Config.PUSH_TYPE_USER: // push notification is specific to user processUserMessage(title, isBackground, data); break; } } /** * Processing chat room push message * this message will be broadcasts to all the activities registered * */ private void processChatRoomPush(String title, boolean isBackground, String data) { if (!isBackground) { try { JSONObject datObj = new JSONObject(data); String chatRoomId = datObj.getString("chat_room_id"); JSONObject mObj = datObj.getJSONObject("message"); Message message = new Message(); message.setMessage(mObj.getString("message")); message.setId(mObj.getString("message_id")); message.setCreatedAt(mObj.getString("created_at")); JSONObject uObj = datObj.getJSONObject("user"); // skip the message if the message belongs to same user as // the user would be having the same message when he was sending // but it might differs in your scenario if (uObj.getString("user_id") .equals(MyApplication.getInstance().getPrefManager().getUser().getId())) { Log.e(TAG, "Skipping the push message as it belongs to same user"); return; } User user = new User(); user.setId(uObj.getString("user_id")); user.setEmail(uObj.getString("email")); user.setName(uObj.getString("name")); message.setUser(user); // verifying whether the app is in background or foreground if (!NotificationUtils.isAppIsInBackground(getApplicationContext())) { // app is in foreground, broadcast the push message Intent pushNotification = new Intent(Config.PUSH_NOTIFICATION); pushNotification.putExtra("type", Config.PUSH_TYPE_CHATROOM); pushNotification.putExtra("message", message); pushNotification.putExtra("chat_room_id", chatRoomId); LocalBroadcastManager.getInstance(this).sendBroadcast(pushNotification); // play notification sound NotificationUtils notificationUtils = new NotificationUtils(); notificationUtils.playNotificationSound(); } else { // app is in background. show the message in notification try Intent resultIntent = new Intent(getApplicationContext(), ChatRoomActivity.class); resultIntent.putExtra("chat_room_id", chatRoomId); showNotificationMessage(getApplicationContext(), title, user.getName() + " : " + message.getMessage(), message.getCreatedAt(), resultIntent); } } catch (JSONException e) { Log.e(TAG, "json parsing error: " + e.getMessage()); Toast.makeText(getApplicationContext(), "Json parse error: " + e.getMessage(), Toast.LENGTH_LONG) .show(); } } else { // the push notification is silent, may be other operations needed // like inserting it in to SQLite } } /** * Processing user specific push message * It will be displayed with / without image in push notification tray * */ private void processUserMessage(String title, boolean isBackground, String data) { if (!isBackground) { try { JSONObject datObj = new JSONObject(data); String imageUrl = datObj.getString("image"); JSONObject mObj = datObj.getJSONObject("message"); Message message = new Message(); message.setMessage(mObj.getString("message")); message.setId(mObj.getString("message_id")); message.setCreatedAt(mObj.getString("created_at")); JSONObject uObj = datObj.getJSONObject("user"); User user = new User(); user.setId(uObj.getString("user_id")); user.setEmail(uObj.getString("email")); user.setName(uObj.getString("name")); message.setUser(user); // verifying whether the app is in background or foreground if (!NotificationUtils.isAppIsInBackground(getApplicationContext())) { // app is in foreground, broadcast the push message Intent pushNotification = new Intent(Config.PUSH_NOTIFICATION); pushNotification.putExtra("type", Config.PUSH_TYPE_USER); pushNotification.putExtra("message", message); LocalBroadcastManager.getInstance(this).sendBroadcast(pushNotification); // play notification sound NotificationUtils notificationUtils = new NotificationUtils(); notificationUtils.playNotificationSound(); } else { // app is in background. show the message in notification try Intent resultIntent = new Intent(getApplicationContext(), MainActivity.class); // check for push notification image attachment if (TextUtils.isEmpty(imageUrl)) { showNotificationMessage(getApplicationContext(), title, user.getName() + " : " + message.getMessage(), message.getCreatedAt(), resultIntent); } else { // push notification contains image // show it with the image showNotificationMessageWithBigImage(getApplicationContext(), title, message.getMessage(), message.getCreatedAt(), resultIntent, imageUrl); } } } catch (JSONException e) { Log.e(TAG, "json parsing error: " + e.getMessage()); Toast.makeText(getApplicationContext(), "Json parse error: " + e.getMessage(), Toast.LENGTH_LONG) .show(); } } else { // the push notification is silent, may be other operations needed // like inserting it in to SQLite } } /** * Showing notification with text only * */ private void showNotificationMessage(Context context, String title, String message, String timeStamp, Intent intent) { notificationUtils = new NotificationUtils(context); intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK); notificationUtils.showNotificationMessage(title, message, timeStamp, intent); } /** * Showing notification with text and image * */ private void showNotificationMessageWithBigImage(Context context, String title, String message, String timeStamp, Intent intent, String imageUrl) { notificationUtils = new NotificationUtils(context); intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK); notificationUtils.showNotificationMessage(title, message, timeStamp, intent, imageUrl); } }