Develop Reference

Xamarin Forms: How to implement notification tapping in android platform?

I have implemented the push notification using FCM in my xamarin forms android project. When I tap on the notification I will show the corresponding content page also.
My code for showing the notification on UI using notificationBuilder
public void SendNotificatios(string body, string Header)
{
var intent = new Intent(this, typeof(MainActivity));
intent.AddFlags(ActivityFlags.ClearTop);
var pendingIntent = PendingIntent.GetActivity(this, 0, intent, PendingIntentFlags.OneShot);
if (Build.VERSION.SdkInt < BuildVersionCodes.O)
{
var notificationBuilder = new NotificationCompat.Builder(this)
.SetContentTitle(Header)
.SetSmallIcon(Resource.Drawable.icon)
.SetContentText(body)
.SetAutoCancel(true)
.SetContentIntent(pendingIntent);
var notificationManager = GetSystemService(Context.NotificationService) as NotificationManager;
notificationManager.Notify(0, notificationBuilder.Build());
//notificationManager.Notify(new Random().Next(), notificationBuilder.Build());
}
else
{
var notificationBuilder = new NotificationCompat.Builder(this, Utils.CHANNEL_ID)
.SetContentTitle(Header)
.SetSmallIcon(Resource.Drawable.icon)
.SetContentText(body)
.SetAutoCancel(true)
.SetContentIntent(pendingIntent);
var notificationManager = GetSystemService(Context.NotificationService) as NotificationManager;
NotificationChannel channel = new NotificationChannel(Utils.CHANNEL_ID, "FCM Notifications", NotificationImportance.Default);
notificationManager.CreateNotificationChannel(channel);
notificationManager.Notify(0, notificationBuilder.Build());
//notificationManager.Notify(new Random().Next(), notificationBuilder.Build());
}
}
I have implemented the notification tapping like below:
MainActivity:
//Background or killed mode
if (Intent.Extras != null)
{
foreach (var key in Intent.Extras.KeySet())
{
var value = Intent.Extras.GetString(key);
Log.Debug(TAG, "Key: {0} Value: {1}", key, value);
if (key == "webContentList") // Make it Dynamic instead of hardcoding here
{
if (value?.Length > 0)
{
isNotification = true;
LoadApplication(new App(value));
}
}
}
}
//Foreground mode
if (FirebaseNotificationService.webContentList.ToString() != "")
{
isNotification = true;
LoadApplication(new App(FirebaseNotificationService.webContentList.ToString()));
FirebaseNotificationService.webContentList = "";
}
//Normal loading
if (!isNotification)
{
LoadApplication(new App(string.Empty));
}
On App.xaml.cs:
public App(string domain, string isNotification)
{
//Notification tapping section
if ((!String.IsNullOrEmpty(isNotification) && isNotification?.Length > 0) || _webContentList != null)
{
_webContentList = JsonConvert.DeserializeObject<List<webContentList>>(isNotification);
MainPage = new DashBoardPage(_webContentList[0],null, isGroup);//loading the corresponsing page
}
else if (domain == "")//normal loading
{
MainPage = new SmartWCM.MainPage(domain, false);
}
}
Currently, only one notification will show on the phone. The new notifications will clear the old one and the last notification will show on the UI. This is happening because I have set 0 as the value inside notificationManager.Notify.
notificationManager.Notify(0, notificationBuilder.Build());
If I change it like a random number like below all notification will show on UI.
notificationManager.Notify(new Random().Next(), notificationBuilder.Build());
My problem at this stage(when multiple notifications are visible on UI) how I can implement the notifications tapping? If I click any notification only the last notifications corresponding page will open. Any solution for this.

Push notifications not opening correct screens

I have an app where I get GCM push notifications in a GcmListenerService(as given in the gcm android sample). Whenever I get the notification, I get some JSON with data related to showing the notification.
Now suppose I get a notification that "someone bookmarked me", for that I get the pk(identifier) of that user and when I click on the notification, it uses the pk received in the push notification to display that user's profile.
The issue : If I get 2 notifications of above mentioned kind, then no matter which notification I click, I always go the profile of the person whose notification I received most recently.
Does getting a notification on top of other, overrides the values of the previous notifications so that only the most recent one is valid? Does that mean I can show only one push notification from an app? I can post the code if that is needed.
Relevant code:
#Override
public void onMessageReceived(String from, Bundle data) {
tinyDB = new TinyDB(this);
if (tinyDB.getBoolean(AppConstants.LOGIN_STATE, false)) {
try {
Log.i("NOTIF", data.toString());
String screen = data.getString("screen");
String dataJson = data.getString("data");
String displayJson = data.getString("display");
String notification_id = data.getString("notif_id");
String priority = data.getString("priority");
String style = data.getString("style");
Gson gson = new GsonBuilder().disableHtmlEscaping().create();
NotificationVal notificationVal = gson.fromJson(displayJson, NotificationVal.class);
String title = notificationVal.getTitle();
String text = notificationVal.getText();
String largeText = notificationVal.getLargeText();
String smallIcon = notificationVal.getSmallIcon();
String largeIcon = notificationVal.getLargeIcon();
Bitmap smallImage = null;
Bitmap largeImage = null;
if (!TextUtils.isEmpty(smallIcon)) {
smallImage = getBitmapFromURL(smallIcon);
}
if ("big_picture".equalsIgnoreCase(style) && (largeImage != null)) {
NotificationCompat.BigPictureStyle notificationStyle = new NotificationCompat.BigPictureStyle();
notificationStyle.setBigContentTitle(title);
notificationStyle.setSummaryText(text);
notificationStyle.bigPicture(largeImage);
Intent intent = NotificationIntentBuilder.get(this, dataJson, screen, smallIcon, largeIcon, notification_id);
TaskStackBuilder stackBuilder = NotificationStackBuilder.get(this, screen, dataJson);
stackBuilder.addNextIntent(intent);
PendingIntent resultPendingIntent =
stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT);
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this);
mBuilder.setSmallIcon(R.drawable.white_square);
mBuilder.setAutoCancel(true);
mBuilder.setColor(Color.parseColor("#fac80a"));
mBuilder.setLargeIcon(largeImage);
mBuilder.setContentTitle(title);
mBuilder.setContentText(text);
mBuilder.setContentIntent(resultPendingIntent);
mBuilder.setDefaults(NotificationCompat.DEFAULT_VIBRATE);
mBuilder.setDefaults(NotificationCompat.DEFAULT_SOUND);
mBuilder.setPriority(NotificationCompat.PRIORITY_HIGH);
mBuilder.setStyle(notificationStyle);
mBuilder.setContentIntent(resultPendingIntent);
NotificationManager mNotificationManager =
(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
if (notification_id != null) {
mNotificationManager.cancel(Integer.parseInt(notification_id));
mNotificationManager.notify(Integer.parseInt(notification_id), mBuilder.build());
}
} else {
Log.i("GCM", "Dummy Notification");
}
} catch (Exception e) {
Log.i("NOTIF", "An exception occurred");
}
}
}
Other internal codes:
public class NotificationStackBuilder {
public static TaskStackBuilder get(Context context, String screen, String data) {
if ("IMAGE".equalsIgnoreCase(screen)) {
TaskStackBuilder stackBuilder = TaskStackBuilder.create(context);
stackBuilder.addParentStack(ImageActivity.class);
return stackBuilder;
} else {
TaskStackBuilder stackBuilder = TaskStackBuilder.create(context);
stackBuilder.addParentStack(NewHomeActivity.class);
return stackBuilder;
}
}
}
public class NotificationIntentBuilder {
public static Intent get(Context context, String data, String screen, String smallIcon, String largeIcon, String notificationId) {
if ("IMAGE".equalsIgnoreCase(screen)) {
String pk = "";
JSONObject jsonObject = null;
try {
jsonObject = new JSONObject(data);
if (jsonObject.has("pk")) {
pk = jsonObject.getString("pk");
}
} catch (JSONException e) {
e.printStackTrace();
}
Intent intent = new Intent(context, ImageActivity.class);
intent.putExtra("ID", pk);
intent.putExtra("notificationId", notificationId);
return intent;
} else if ("GALLERY".equalsIgnoreCase(screen)) {
String pk = "";
JSONObject jsonObject = null;
try {
jsonObject = new JSONObject(data);
if (jsonObject.has("pk")) {
pk = jsonObject.getString("pk");
}
} catch (JSONException e) {
e.printStackTrace();
}
Intent intent = new Intent(context, GalleryActivity.class);
intent.putExtra("ID", pk);
intent.putExtra("notificationId", notificationId);
return intent;
} else {
return new Intent(context, NewHomeActivity.class);
}
}
}
Edit This issue is not happening with two notifications of different type(opening different activities), it is only happening with notifications opening the same screen.
Edit 1 Here is the value received in the push notification:
Bundle[{google.sent_time=1469254984538, priority=0, screen=IMAGE, data={"pk":650}, style=big_picture, google.message_id=0:1469254984541527%e07f0e28f9fd7ecd, notif_id=4267, display={"large_icon":"https:\/\/d2r0rrogy5uf19.cloudfront.net\/photos\/971c03f8-6a5d-30a3-9e49-0ab416cb8fa0.jpg","small_icon":"","text":"Random hi5'd your photo to 'Diwali'","title":"random","large_text":""}, collapse_key=do_not_collapse}]
This one has notificationId as 4267, now suppose I get another notification for same screen, with notificationId say, 4268, then when I log the notificationId received in the Image screen, I get 4268 on opening both the notifications.
Edit 2 I guess the issue is related to PendingIntent.FLAG_UPDATE_CURRENT. Here is what is written in the documentation:
Flag indicating that if the described PendingIntent already exists, then keep it but replace its extra data with what is in this new Intent.
This is what was happening. The contents of intent extras were getting over-written by the latest notification's intent extras. So, I tried using FLAG_ONE_SHOT, but with that I am able to open the old intent but noting opens when I click the latest intent.
I want both notifications to be on the push notification list and that both of them should the respective screens with different values of intent extras.

You need to have unique request code for each notification or else it will be replaced with new one.
An excerpt from PendingIntent documentation :
The last intent in the array represents the key for the PendingIntent.
In other words, it is the significant element for matching (as done
with the single intent given to getActivity(Context, int, Intent,
int), its content will be the subject of replacement by send(Context,
int, Intent) and FLAG_UPDATE_CURRENT, etc. This is because it is the
most specific of the supplied intents, and the UI the user actually
sees when the intents are started.
So replace the below line:
PendingIntent resultPendingIntent = stackBuilder. getPendingIntent(0,
PendingIntent.FLAG_UPDATE_CURRENT);
Assuming notification_id is unique integer, just replace it like below:
PendingIntent resultPendingIntent =
stackBuilder.getPendingIntent(Integer.parseInt(notification_id)
, PendingIntent.FLAG_UPDATE_CURRENT);

Opening Browser on push notification

I am trying to open the browser with a url when the user click on the push notification, i search in stackoverflow and i find this
Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
startActivity(browserIntent);
but it doesnt work for me, when i put that the notification doesnt appear, i debugged it and it only throw the class file editor no error or anything.
this is the code
public void mostrarNotificacion(Context context, String body,String title, String icon, String url,String superior)
{
String ns = Context.NOTIFICATION_SERVICE;
NotificationManager notManager = (NotificationManager) context.getSystemService(ns);
int icono = R.drawable.mydrawable;
CharSequence textoEstado = superior;
long hora = System.currentTimeMillis();
Notification notif = new Notification(icono, textoEstado, hora);
Context contexto = context.getApplicationContext();
CharSequence titulo = title;
CharSequence descripcion = body;
PendingIntent contIntent;
if(url.equalsIgnoreCase("NULL"))
{
Intent notIntent = new Intent(contexto,MainActivity.class);
contIntent = PendingIntent.getActivity(
contexto, 0, notIntent, 0);
}
else
{
// Intent i = new Intent(Intent.ACTION_VIEW);
//i.setData(Uri.parse(url));
// contIntent = PendingIntent.getActivity(contexto, 0, i, 0);
Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
startActivity(browserIntent);
}
// notif.setLatestEventInfo(contexto, titulo, descripcion, contIntent);
//AutoCancel:
notif.flags |= Notification.FLAG_AUTO_CANCEL;
//send notif
notManager.notify(1, notif);
}

What you need to do is set a pending intent -
which will be invoked when the user clicks the notification.
(Above you just started an activity...)
Here's a sample code :
private void createNotification(String text, String link){
NotificationCompat.Builder notificationBuilder =
new NotificationCompat.Builder(this)
.setAutoCancel(true)
.setSmallIcon(R.drawable.app_icon)
.setContentTitle(text);
NotificationManager mNotificationManager =
(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
// pending implicit intent to view url
Intent resultIntent = new Intent(Intent.ACTION_VIEW);
resultIntent.setData(Uri.parse(link));
PendingIntent pending = PendingIntent.getActivity(this, 0, resultIntent, PendingIntent.FLAG_UPDATE_CURRENT);
notificationBuilder.setContentIntent(pending);
// using the same tag and Id causes the new notification to replace an existing one
mNotificationManager.notify(String.valueOf(System.currentTimeMillis()), PUSH, notificationBuilder.build());
}
Edit 1 :
I changed the answer to use PendingIntent.FLAG_UPDATE_CURRENT for the sample purpose. Thanks Aviv Ben Shabat for the comment.
Edit 2 :
Following Alex Zezekalo's comment, note that opening the notification from the lock screen, assuming chrome is used, will fail as explained in the open issue : https://code.google.com/p/chromium/issues/detail?id=455126 -
Chrome will ignore the intent, and you should be able to find in your logcat -
E/cr_document.CLActivity﹕ Ignoring intent: Intent { act=android.intent.action.VIEW dat=http://google.com/... flg=0x1000c000 cmp=com.android.chrome/com.google.android.apps.chrome.Main (has extras) }

Return json object when notification is clicked

I'm building an android app which supports push notifications using phonegap/cordova and this plugin. The plugin has an onMessage() method which is triggered whenever a push notification is received, this method returns a json object to my javascript plugin. However I want this method to return the json only when the notification on status bar is clicked.
This is my onMessage() method:
protected void onMessage(Context context, Intent intent) {
String message = "", title = "", type = "";
int msgctn = 0, schoolid = 0, studentid = 0, contentid = 0;
// Extract the payload from the message
Bundle extras = intent.getExtras();
if (extras != null) {
try
{
message = extras.getString("message");
title = extras.getString("title");
type = extras.getString("type");
msgctn = Integer.parseInt(extras.getString("msgctn"));
schoolid = Integer.parseInt(extras.getString("schoolid"));
studentid = Integer.parseInt(extras.getString("studentid"));
contentid = Integer.parseInt(extras.getString("contentid"));
JSONObject json;
json = new JSONObject().put("event", "message");
json.put("message", message);
json.put("type", type);
json.put("contentid", contentid);
json.put("schoolid", schoolid);
json.put("studentid", studentid);
GCMPlugin.sendJavascript( json );
// Send the MESSAGE to the Javascript application
}
catch( JSONException e)
{
Log.e(ME + ":onMessage", "JSON exception");
}
Intent notificationIntent = new Intent(context, App4.class);
notificationIntent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
PendingIntent contentIntent = PendingIntent.getActivity(context, 0, notificationIntent, 0);
NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
.setContentText(message)
.setContentTitle(title)
.setSmallIcon(Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB ? R.drawable.icon : android.R.drawable.ic_dialog_info)
.setAutoCancel(true)
.setContentIntent(contentIntent)
.setWhen(System.currentTimeMillis())
//.setDefaults(Notification.DEFAULT_ALL)
.setLights(-16711681, 2000, 1000)
.setNumber(msgctn)
.setSound(Uri.parse("android.resource://"+ getPackageName() + "/" + R.raw.notifsound));
Notification notification = builder.build();
NotificationManager notificationManager = getNotificationManager(context);
notificationManager.notify(1, notification);
}
I had to create a notification object in order to show it on status bar. When the notification is clicked it calls intent App4, this shows the index.html of my app, but I want to execute some javascript function or return some json object to my app using the payload. Maybe I can call other function to do this, not an intent but I'm new on android world and don't know how to do it.
Can anyone help me please?

What you can do is put the JSON data as extras in the notificationIntent Intent that you are creating. You can do this by calling the putExtras() method of your notificationIntent, or do it manually. Whichever way you do it you need to get the data you want into the notificationIntent as extras.
Then when your App4 activity starts you will need catch the Intent in either onNewIntent() or onCreate() and check to see if the Intent or Bundle has the extras that you want. If it does then you create the JSON object and pass it to your javascript application just like you did in the onMessage() method you pasted.
You will also have to remove the code that sends the JSON object to your javascript application in the onMessage() method.
I hope that helps, it should work but I'm away from my computer and can't actually test the code.

sending an audio file via push notification in android

Is it possible to send an audio file as a push notification in android ? What i want to do is that the user can record his voice as a message and then that message should be delivered to all the users with that app as a push notification . is it possible ?

According to below document, CGM / C2DM / Push Notification can send only 4KB data, So, you can not send audio files via push notification,
http://developer.android.com/guide/google/gcm/c2dm.html
"Apps can use "messages with payload" to deliver messages of up to 4 Kb"
But you can send http url of any audio file, in mobile app will receive audio file link via cgm message and download audio file using http connection.

The other way to do it, is use a module that has already implemented this for you. Technically you do the exact same thing that is described here, however with a single API call to providers like mBlox (http://developer.mblox.com), you'll be able to post your content and the devices you want to target, the hosting of the content, and the translation to a URL are being done for you, as well as sending the actual push notification.
Again, technically, it's the same as previous answers, however, for your personal integration it might be a quicker way to get to market.

There is a Way, we can send a audio url in data from FCM. After that we can parse and sent to another activity.
In FIREBASE SERVICE
JSONObject object = null;
try {
String data = remoteMessage.getData().toString();
Map<String, String> params = remoteMessage.getData();
object = new JSONObject(params);
} catch (Exception e) {
Log.e("FCM err 1", e.getMessage());
}
sendNotification(this, remoteMessage.getNotification().getBody(), remoteMessage.getNotification().getTitle(), remoteMessage.getNotification().getClickAction(), object);
PUSH NOTIFICATION FUNCTION
public static void sendNotification(Context context, String Message, String Title, String ClickAction, JSONObject object) {
NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
final String CHANNEL_ID = "KRB";
if (Build.VERSION.SDK_INT >= 26) { // Build.VERSION_CODES.O
NotificationChannel mChannel = new NotificationChannel(CHANNEL_ID, "KRB_channel", NotificationManager.IMPORTANCE_HIGH);
notificationManager.createNotificationChannel(mChannel);
}
// intent = Home
Intent intent = new Intent(ClickAction);
try {
Log.e("FCMurl", object.getString("url"));
Log.e("FCMtype", object.getString("type"));
intent.putExtra("url", object.getString("url"));
intent.putExtra("type", object.getString("type"));
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
} catch (Exception e) {
// Toast.makeText(context, e.getMessage(), Toast.LENGTH_SHORT).show();
Log.e("FCM err", e.getMessage());
}
PendingIntent pendingIntent = PendingIntent.getActivity(context, 0 /* Request code */, intent, PendingIntent.FLAG_UPDATE_CURRENT);
Uri defaultSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(context, CHANNEL_ID)
.setSmallIcon(R.drawable.icon_logo)
.setColor(Color.parseColor("#531E6C")) // small icon background color
.setLargeIcon(BitmapFactory.decodeResource(context.getResources(), R.drawable.icon_sfach))
.setContentTitle(Title)
.setContentText(Message)
.setAutoCancel(true)
.setSound(defaultSoundUri)
.setPriority(Notification.PRIORITY_MAX)
.setDefaults(Notification.DEFAULT_ALL)
.setContentIntent(pendingIntent);
notificationManager.notify(0 /* ID of notification */, notificationBuilder.build());
}
In activity
Intent intent = getIntent();
Bundle bundle = intent.getExtras();
String url;
if(bundle != null){
url = bundle.getString("url");
MediaPlayer mediaplayer = new MediaPlayer();
try {
mediaplayer.setDataSource(url);
mediaplayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
mediaplayer.prepareAsync();
mediaplayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mp) {
mediaplayer.start();
}
});
} catch (IOException e) {
e.printStackTrace();
}
}