Java tutorial
/* * * 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.df.push; import java.io.IOException; import java.util.ArrayList; import java.util.Arrays; import java.util.List; import java.util.concurrent.atomic.AtomicInteger; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; import android.app.Activity; import android.app.AlertDialog; import android.app.ProgressDialog; import android.content.Context; import android.content.DialogInterface; import android.content.SharedPreferences; import android.content.pm.PackageInfo; import android.content.pm.PackageManager.NameNotFoundException; import android.os.AsyncTask; import android.os.Bundle; import android.text.TextUtils; import android.util.Log; import android.view.View; import android.widget.TextView; import android.widget.Toast; import com.google.android.gms.common.ConnectionResult; import com.google.android.gms.common.GooglePlayServicesUtil; import com.google.android.gms.gcm.GoogleCloudMessaging; import com.mashape.unirest.http.HttpResponse; import com.mashape.unirest.http.JsonNode; import com.mashape.unirest.http.Unirest; import com.mashape.unirest.http.exceptions.UnirestException; /** * Main UI for the demo app. */ public class DemoActivity extends Activity { public static final String EXTRA_MESSAGE = "message"; public static final String PROPERTY_REG_ID = "registration_id"; public static final String PROPERTY_SUB = "subscriptions"; public static final String PROPERTY_REG_URL = "registration_url"; private static final String PROPERTY_APP_VERSION = "appVersion"; private static final int PLAY_SERVICES_RESOLUTION_REQUEST = 9000; /** * Substitute you own sender ID here. This is the project number you got * from the API Console, as described in "Getting Started." */ String SENDER_ID = "138837205839"; /** * Tag used on log messages. */ static final String TAG = "DF GCM Demo"; TextView mDisplay; GoogleCloudMessaging gcm; AtomicInteger msgId = new AtomicInteger(); Context context; String regid; ProgressDialog progressDialog; // private CharSequence[] topics = { // "Rajesh", "Mahesh", "Vijayakumar" // }; private ArrayList<String> topics = new ArrayList<String>(); private List<String> subscriptions = new ArrayList<String>(); @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); mDisplay = (TextView) findViewById(R.id.display); context = getApplicationContext(); progressDialog = new ProgressDialog(DemoActivity.this); progressDialog.setMessage("Please wait..."); // Check device for Play Services APK. If check succeeds, proceed with GCM registration. if (checkPlayServices()) { // display loading bar and fetch topics for future use getTopics(); } else { Log.i(TAG, "No valid Google Play Services APK found."); } readSubscriptions(); // if subscribed previously final SharedPreferences prefs = getGcmPreferences(context); if (prefs.getString(PROPERTY_REG_URL, null) == null) { // device token is not updated on server, disable subscribe and unsubscribe buttons findViewById(R.id.subscribe).setVisibility(View.GONE); findViewById(R.id.unsubscribe).setVisibility(View.GONE); } else { findViewById(R.id.subscribe).setVisibility(View.VISIBLE); findViewById(R.id.unsubscribe).setVisibility(View.VISIBLE); } } @Override protected void onResume() { super.onResume(); // Check device for Play Services APK. checkPlayServices(); } /** * Check the device to make sure it has the Google Play Services APK. If * it doesn't, display a dialog that allows users to download the APK from * the Google Play Store or enable it in the device's system settings. */ private boolean checkPlayServices() { int resultCode = GooglePlayServicesUtil.isGooglePlayServicesAvailable(this); if (resultCode != ConnectionResult.SUCCESS) { if (GooglePlayServicesUtil.isUserRecoverableError(resultCode)) { GooglePlayServicesUtil.getErrorDialog(resultCode, this, PLAY_SERVICES_RESOLUTION_REQUEST).show(); } else { Log.i(TAG, "This device is not supported."); finish(); } return false; } return true; } /** * Stores the registration ID and the app versionCode in the application's * {@code SharedPreferences}. * * @param context application's context. * @param regId registration ID */ private void storeRegistrationId(Context context, String regId) { final SharedPreferences prefs = getGcmPreferences(context); int appVersion = getAppVersion(context); Log.i(TAG, "Saving regId on app version " + appVersion); SharedPreferences.Editor editor = prefs.edit(); editor.putString(PROPERTY_REG_ID, regId); editor.putInt(PROPERTY_APP_VERSION, appVersion); editor.commit(); } /** * Gets the current registration ID for application on GCM service, if there is one. * <p> * If result is empty, the app needs to register. * * @return registration ID, or empty string if there is no existing * registration ID. */ private String getRegistrationId(Context context) { final SharedPreferences prefs = getGcmPreferences(context); String registrationId = prefs.getString(PROPERTY_REG_ID, ""); if (registrationId.isEmpty()) { Log.i(TAG, "Registration not found."); return ""; } // Check if app was updated; if so, it must clear the registration ID // since the existing regID is not guaranteed to work with the new // app version. int registeredVersion = prefs.getInt(PROPERTY_APP_VERSION, Integer.MIN_VALUE); int currentVersion = getAppVersion(context); if (registeredVersion != currentVersion) { Log.i(TAG, "App version changed."); return ""; } return registrationId; } /** * Registers the application with GCM servers asynchronously. * <p> * Stores the registration ID and the app versionCode in the application's * shared preferences. */ private void registerInBackground() { new AsyncTask<Void, Void, String>() { @Override protected String doInBackground(Void... params) { String msg = ""; try { if (gcm == null) { gcm = GoogleCloudMessaging.getInstance(context); } regid = gcm.register(SENDER_ID); msg = "Device registered, registration ID=" + regid; // You should send the registration ID to your server over HTTP, so it // can use GCM/HTTP or CCS to send messages to your app. sendRegistrationIdToBackend(regid); storeRegistrationId(context, regid); } catch (IOException ex) { msg = "Error :" + ex.getMessage(); // If there is an error, don't just keep trying to register. // Require the user to click a button again, or perform // exponential back-off. } return msg; } @Override protected void onPostExecute(String msg) { mDisplay.append(msg + "\n"); Toast.makeText(getApplicationContext(), msg, Toast.LENGTH_LONG).show(); progressDialog.dismiss(); } @Override protected void onPreExecute() { if (progressDialog != null) progressDialog.show(); }; }.execute(null, null, null); } // Send an upstream message. public void onClick(final View view) { if (view == findViewById(R.id.register)) { // Check device for Play Services APK. If check succeeds, proceed with GCM registration. if (checkPlayServices()) { gcm = GoogleCloudMessaging.getInstance(this); regid = getRegistrationId(context); if (regid.isEmpty()) { registerInBackground(); } else { sendRegistrationIdToBackend(regid); } } else { Log.i(TAG, "No valid Google Play Services APK found."); } } else if (view == findViewById(R.id.clear)) { mDisplay.setText(""); } else if (view == findViewById(R.id.subscribe)) { displayOptionsToSubscribe(); } else if (view == findViewById(R.id.unsubscribe)) { displayOptionsToUnbscribe(); } } private void displayOptionsToSubscribe() { final CharSequence[] cs = topics.toArray(new CharSequence[topics.size()]); AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setTitle("Select topic to subscribe"); builder.setItems(cs, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int item) { // Do something with the selection final SharedPreferences prefs = getGcmPreferences(context); subscribe(cs[item].toString(), prefs.getString(PROPERTY_REG_URL, null)); } }); AlertDialog alert = builder.create(); alert.show(); } private void displayOptionsToUnbscribe() { if (subscriptions.size() == 0) { Toast.makeText(getApplicationContext(), "No Subscriptions...", Toast.LENGTH_LONG).show(); return; } final CharSequence[] cs = subscriptions.toArray(new CharSequence[subscriptions.size()]); AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setTitle("Select item to unsubscribe"); builder.setItems(cs, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int item) { // Do something with the selection unsubscribe(cs[item].toString()); } }); AlertDialog alert = builder.create(); alert.show(); } @Override protected void onDestroy() { saveSubscriptionList(); super.onDestroy(); } /** * @return Application's version code from the {@code PackageManager}. */ private static int getAppVersion(Context context) { try { PackageInfo packageInfo = context.getPackageManager().getPackageInfo(context.getPackageName(), 0); return packageInfo.versionCode; } catch (NameNotFoundException e) { // should never happen throw new RuntimeException("Could not get package name: " + e); } } /** * @return Application's {@code SharedPreferences}. */ private SharedPreferences getGcmPreferences(Context context) { // This sample app persists the registration ID in shared preferences, but // how you store the regID in your app is up to you. return getSharedPreferences(DemoActivity.class.getSimpleName(), Context.MODE_PRIVATE); } /** * Sends the registration ID to your server over HTTP, so it can use GCM/HTTP or CCS to send * messages to your app. Not needed for this demo since the device sends upstream messages * to a server that echoes back the message using the 'from' address in the message. */ private void sendRegistrationIdToBackend(final String regId) { // Dreamfactory server url final String url = "https://next.cloud.dreamfactory.com/rest/sns/app/662443008147:app/GCM/com.dreamfactory.launchpad/endpoint?app_name=todoangular"; new AsyncTask<Void, Void, String>() { @Override protected String doInBackground(Void... params) { String msg = ""; JSONObject obj = new JSONObject(); try { obj.put("Token", regId); } catch (JSONException e1) { e1.printStackTrace(); } Log.i(TAG, "Device registration request data " + obj.toString()); // Your implementation here. HttpResponse<JsonNode> jsonResponse; try { jsonResponse = Unirest.post(url).header("accept", "application/json").body(obj.toString()) .asJson(); String endPoint = jsonResponse.getBody().getObject().getString("EndpointArn"); Log.i(TAG, "Device registration response " + jsonResponse.getBody().getObject().toString()); msg = null; final SharedPreferences prefs = getGcmPreferences(context); SharedPreferences.Editor editor = prefs.edit(); editor.putString(PROPERTY_REG_URL, endPoint); editor.commit(); } catch (Exception e) { msg = e.getLocalizedMessage(); } return msg; } @Override protected void onPostExecute(String msg) { if (msg == null) { findViewById(R.id.subscribe).setVisibility(View.VISIBLE); findViewById(R.id.unsubscribe).setVisibility(View.VISIBLE); } else { mDisplay.append(msg + "\n"); } progressDialog.dismiss(); } @Override protected void onPreExecute() { if (progressDialog != null) progressDialog.show(); }; }.execute(null, null, null); } private void getTopics() { final String url = "https://next.cloud.dreamfactory.com/rest/sns/topic?app_name=todoangular"; new AsyncTask<Void, Void, String>() { @Override protected String doInBackground(Void... params) { String msg = ""; HttpResponse<JsonNode> jsonResponse; try { jsonResponse = Unirest.get(url).header("accept", "application/json").asJson(); JSONArray topicsArray = jsonResponse.getBody().getObject().getJSONArray("resource"); for (int i = 0; i < topicsArray.length(); i++) { topics.add(topicsArray.getJSONObject(i).getString("Topic")); } Log.i(TAG, "Get Topic Response " + topics.toString()); } catch (Exception e) { msg = e.getLocalizedMessage(); } return msg; } @Override protected void onPostExecute(String msg) { // mDisplay.append(msg + "\n") progressDialog.dismiss(); } @Override protected void onPreExecute() { if (progressDialog != null) progressDialog.show(); }; }.execute(null, null, null); } private void subscribe(final String topic, final String endPoint) { final String url = "https://next.cloud.dreamfactory.com/rest/sns/subscription?app_name=todoangular"; new AsyncTask<Void, Void, String>() { @Override protected String doInBackground(Void... params) { String msg = ""; JSONObject obj = new JSONObject(); try { obj.put("Topic", topic); obj.put("Protocol", "application"); obj.put("Endpoint", endPoint); } catch (JSONException e1) { e1.printStackTrace(); } HttpResponse<JsonNode> jsonResponse; try { jsonResponse = Unirest.post(url).header("accept", "application/json").body(obj.toString()) .asJson(); msg = "Subscribe response " + jsonResponse.getBody().toString(); subscriptions.add(jsonResponse.getBody().getObject().getString("SubscriptionArn")); Log.i(TAG, msg); } catch (Exception e) { msg = e.getLocalizedMessage(); } return msg; } @Override protected void onPostExecute(String msg) { mDisplay.append(msg + "\n"); progressDialog.dismiss(); } @Override protected void onPreExecute() { if (progressDialog != null) progressDialog.show(); }; }.execute(null, null, null); } private void unsubscribe(final String topic) { final String url = "https://next.cloud.dreamfactory.com/rest/sns/subscription/" + topic + "?app_name=todoangular"; new AsyncTask<Void, Void, String>() { @Override protected String doInBackground(Void... params) { String msg = ""; HttpResponse<JsonNode> jsonResponse; try { jsonResponse = Unirest.delete(url).header("accept", "application/json").asJson(); msg = "Unsubscribe response " + jsonResponse.getBody().toString(); Log.i(TAG, msg); subscriptions.remove(topic); } catch (UnirestException e) { msg = e.getLocalizedMessage(); } return msg; } @Override protected void onPostExecute(String msg) { mDisplay.append(msg + "\n"); progressDialog.dismiss(); subscriptions.remove(topic); } @Override protected void onPreExecute() { if (progressDialog != null) progressDialog.show(); }; }.execute(null, null, null); } private void readSubscriptions() { final SharedPreferences prefs = getGcmPreferences(context); String serialized = prefs.getString(PROPERTY_SUB, null); if (serialized != null) subscriptions = Arrays.asList(TextUtils.split(serialized, ",")); } private void saveSubscriptionList() { final SharedPreferences prefs = getGcmPreferences(context); SharedPreferences.Editor editor = prefs.edit(); editor.putString(PROPERTY_SUB, TextUtils.join(",", subscriptions)); editor.commit(); } }