Java tutorial
/** * Copyright 2015 Google Inc. All Rights Reserved. * * 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 hk.edu.cuhk.ie.iems5722.a2_1155069587; import android.app.IntentService; import android.content.Intent; import android.content.SharedPreferences; import android.net.Uri; import android.os.AsyncTask; import android.preference.PreferenceManager; import android.support.v4.content.LocalBroadcastManager; import android.util.Log; import android.widget.Toast; import com.google.android.gms.gcm.GoogleCloudMessaging; import com.google.android.gms.iid.InstanceID; import org.json.JSONObject; import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.InputStream; import java.io.InputStreamReader; import java.io.OutputStream; import java.io.OutputStreamWriter; import java.net.HttpURLConnection; import java.net.URL; public class RegistrationIntentService extends IntentService { private static final String TAG = "RegIntentService"; public RegistrationIntentService() { super(TAG); } @Override protected void onHandleIntent(Intent intent) { SharedPreferences sharedPreferences = getSharedPreferences("iems5722", MODE_PRIVATE); SharedPreferences.Editor editor = sharedPreferences.edit(); Log.i(TAG, "enter"); try { // [START register_for_gcm] // Initially this call goes out to the network to retrieve the token, subsequent calls // are local. // R.string.gcm_defaultSenderId (the Sender ID) is typically derived from google-services.json. // See https://developers.google.com/cloud-messaging/android/start for details on this file. // [START get_token] InstanceID instanceID = InstanceID.getInstance(this); String token = instanceID.getToken(getString(R.string.defaultSenderId), GoogleCloudMessaging.INSTANCE_ID_SCOPE, null); // [END get_token] Log.i(TAG, "GCM Registration Token: " + token); // TODO: Implement this method to send any registration to your app's servers. sendRegistrationToServer(token); // Subscribe to topic channels //subscribeTopics(token); // You should store a boolean that indicates whether the generated token has been // sent to your server. If the boolean is false, send the token to your server, // otherwise your server should have already received the token. editor.putString("token", token); editor.commit(); // [END register_for_gcm] } catch (Exception e) { Log.d(TAG, "Failed to complete token refresh", e); // If an exception happens while fetching the new token or updating our registration data // on a third-party server, this ensures that we'll attempt the update at a later time. editor.putString("token", ""); editor.commit(); } // Notify UI that registration has completed, so the progress indicator can be hidden. //Intent registrationComplete = new Intent(AppSharedPreference.REGISTRATION_COMPLETE); //LocalBroadcastManager.getInstance(this).sendBroadcast(registrationComplete); } /** * Persist registration to third-party servers. * <p/> * Modify this method to associate the user's GCM registration token with any server-side account * maintained by your application. * * @param token The new token. */ private void sendRegistrationToServer(String token) { String sendRegApi = getString(R.string.sendreg_api); Log.d("sendregid", "" + sendRegApi + " " + getResources().getInteger(R.integer.myuserid) + " " + token); new sendRegID().execute(sendRegApi, "" + getResources().getInteger(R.integer.myuserid), token); // Add custom implementation, as needed. } class sendRegID extends AsyncTask<String, Void, String> { private Exception exception; @Override protected String doInBackground(String... params) { String sendResult = ""; String line; try { URL url = new URL(params[0]); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); conn.setReadTimeout(10000); conn.setConnectTimeout(15000); conn.setRequestMethod("POST"); conn.setDoInput(true); conn.setDoOutput(true); OutputStream os = conn.getOutputStream(); BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(os, "UTF-8")); Uri.Builder builder = new Uri.Builder(); builder.appendQueryParameter(getString(R.string.sendregid_param1), params[1]); builder.appendQueryParameter(getString(R.string.sendregid_param2), params[2]); String query = builder.build().getEncodedQuery(); writer.write(query); writer.flush(); writer.close(); os.close(); int response = conn.getResponseCode(); if (response != 200) { Toast.makeText(getApplicationContext(), getString(R.string.servererror), Toast.LENGTH_SHORT) .show(); return null; } Log.d("sendregid", "response = " + response); InputStream is = conn.getInputStream(); BufferedReader br = new BufferedReader(new InputStreamReader(is)); while ((line = br.readLine()) != null) { sendResult += line; } } catch (Exception e) { // Toast.makeText(getApplicationContext(), getString(R.string.servererror), Toast.LENGTH_SHORT).show(); exception = e; return null; } return sendResult; } @Override protected void onPostExecute(String s) { if (s != null) { try { JSONObject json = new JSONObject(s); String status = json.getString("status"); if (!status.equals("OK")) { Toast.makeText(getApplicationContext(), getString(R.string.servererror), Toast.LENGTH_SHORT) .show(); } } catch (Exception e) { Toast.makeText(getApplicationContext(), getString(R.string.servererror), Toast.LENGTH_SHORT) .show(); } } super.onPostExecute(s); } } }