Develop Reference

trouble implementing android notifications

I would greatly appreciate any help with troubleshooting my use of notifications within the Android emulator. I have tried several different versions without success and the code below seems to distill the needed elements down to the minimum. The problem is that the notification simply doesn't get sent. I hear the "click" noise when I tap the button in the emulator but nothing else.
I had read somewhere that having the wrong type of image may cause problems and I have tried several. The one I have included now is generated using Vector Asset within the res folder. It feels like there is something simple that I am missing but from what I can see from all the examples I have found online the basic elements are sound.
Any help or direction would be appreciated.
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.NotificationCompat;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
public class MainActivity extends AppCompatActivity {
NotificationCompat.Builder notification;
private static final int idNumber = 123;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
notification = new NotificationCompat.Builder(this);
notification.setAutoCancel(true);
}
public void sendNotification(View view){
notification.setSmallIcon(R.drawable.ic_android_black_24dp);
notification.setContentText("This is the notification message");
notification.setContentTitle("Notification");
notification.setTicker("There is a notification");
notification.setWhen(System.currentTimeMillis());
Intent intent = new Intent(this, MainActivity.class);
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
notification.setContentIntent(pendingIntent);
NotificationManager nm = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);
nm.notify(idNumber, notification.build());
}
}

How to make Android Direct Reply Notification feature work in pre - Android N devices?

I am trying to implement Android Direct Reply notification in my app. I've managed to implement it successfully in Android N emulator. But it is not working on Marshmallow devices. When I click on action button in notification the reply edittext is not showing in devices below Android N. I know this feature will work in pre Android N devices, as it is available in WhatsApp.
My question is how to make it work in pre Android N devices? I'm sharing my code here. Any help would be great. Thanks.
MainActivity
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.RemoteInput;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
public class MainActivity extends AppCompatActivity {
// Key for the string that's delivered in the action's intent.
public static final String KEY_TEXT_REPLY = "key_text_reply";
private static final int notificationID = 1234;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
startNotif();
}
});
}
private void startNotif() {
Intent intent = new Intent(this, NotificationReciever.class);
// use System.currentTimeMillis() to have a unique ID for the pending intent
final PendingIntent pIntent = PendingIntent.getActivity(this, (int) System.currentTimeMillis(), intent, 0);
String replyLabel = "Reply";
RemoteInput remoteInput = new RemoteInput.Builder(KEY_TEXT_REPLY)
.setLabel(replyLabel)
.build();
// Create the reply action and add the remote input.
Notification.Action action =
new Notification.Action.Builder(R.drawable.ic_send,
"Action", pIntent)
.addRemoteInput(remoteInput)
.build();
// Build the notification and add the action.
Notification newMessageNotification =
new Notification.Builder(MainActivity.this)
.setSmallIcon(R.drawable.ic_remove_circle_black_48dp)
.setContentTitle("Title")
.setContentText("Content")
.addAction(action).build();
// Issue the notification.
NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
manager.notify(notificationID, newMessageNotification);
}
}
NotificationReciever
import android.app.Activity;
import android.app.RemoteInput;
import android.content.Intent;
import android.os.Bundle;
import android.widget.Toast;
/**
* Created by User on 13-Jun-16.
*/
public class NotificationReciever extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Toast.makeText(this,getMessageText(getIntent()),Toast.LENGTH_SHORT).show();
}
private CharSequence getMessageText(Intent intent) {
Bundle remoteInput = RemoteInput.getResultsFromIntent(intent);
if (remoteInput != null) {
return remoteInput.getCharSequence(MainActivity.KEY_TEXT_REPLY);
}
Toast.makeText(this,"Remoteinput is null",Toast.LENGTH_SHORT).show();
return null;
}
}

In the docs it tells you to not use a broadcast receiver or a service for api below N. So you'd have to launch an activity which does what you want and wrap it in a pending intent instead.
if (isDirectReplySupported) {
return PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_ONE_SHOT);
}
return PendingIntent.getActivity(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);

Implementing this feature is very simple, first make one broadcastreceiver, as usual create a action button & hook up with pendingintent.
Then connect that intent to push notification object & notify.
In broadcastreceiver handle the reading text part & updating to notification.
Refer this post for sample example http://www.feelzdroid.com/2017/01/android-n-inline-reply-push-notifications.html

android notification in background if app closed?

I am trying to display a notification in the Android notifications bar even if my application is closed.
I've tried searching, but I have had no luck finding help.
An example of this is a news application. Even if the phone screen is off or the news application is closed, it can still send a notification for recent news and have it appear in the notification bar.
How might I go about doing this in my own application?

You have to build a Service that handles your news and shows notifications when it knows that are new news (Service Doc).
The service will run in background even if your application is closed.
You need a BroadcastReciever to run the service in background after the boot phase is completed. (Start service after boot).
The service will build your notifications and send them through the NotificationManager.
EDIT: This article may suit your needs

The selected answer is still correct, but only for devices running Android 7 versions and below.
As of Android 8+, you can no longer have a service running in the background while your app is idle/closed.
So, it now depends on how you set up your notifications from your GCM/FCM server. Ensure to set it to the highest priority. If your app is in the background or just not active and you only send notification data, the system process your notification and send it to the Notification tray.

I used this answer to write a service, and as an exmaple you need to call ShowNotificationIntentService.startActionShow(getApplicationContext()) inside one of your activities:
import android.app.IntentService;
import android.content.Intent;
import android.content.Context;
public class ShowNotificationIntentService extends IntentService {
private static final String ACTION_SHOW_NOTIFICATION = "my.app.service.action.show";
private static final String ACTION_HIDE_NOTIFICATION = "my.app.service.action.hide";
public ShowNotificationIntentService() {
super("ShowNotificationIntentService");
}
public static void startActionShow(Context context) {
Intent intent = new Intent(context, ShowNotificationIntentService.class);
intent.setAction(ACTION_SHOW_NOTIFICATION);
context.startService(intent);
}
public static void startActionHide(Context context) {
Intent intent = new Intent(context, ShowNotificationIntentService.class);
intent.setAction(ACTION_HIDE_NOTIFICATION);
context.startService(intent);
}
#Override
protected void onHandleIntent(Intent intent) {
if (intent != null) {
final String action = intent.getAction();
if (ACTION_SHOW_NOTIFICATION.equals(action)) {
handleActionShow();
} else if (ACTION_HIDE_NOTIFICATION.equals(action)) {
handleActionHide();
}
}
}
private void handleActionShow() {
showStatusBarIcon(ShowNotificationIntentService.this);
}
private void handleActionHide() {
hideStatusBarIcon(ShowNotificationIntentService.this);
}
public static void showStatusBarIcon(Context ctx) {
Context context = ctx;
NotificationCompat.Builder builder = new NotificationCompat.Builder(ctx)
.setContentTitle(ctx.getString(R.string.notification_message))
.setSmallIcon(R.drawable.ic_notification_icon)
.setOngoing(true);
Intent intent = new Intent(context, MainActivity.class);
PendingIntent pIntent = PendingIntent.getActivity(context, STATUS_ICON_REQUEST_CODE, intent, 0);
builder.setContentIntent(pIntent);
NotificationManager mNotificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
Notification notif = builder.build();
notif.flags |= Notification.FLAG_ONGOING_EVENT;
mNotificationManager.notify(STATUS_ICON_REQUEST_CODE, notif);
}
}

android C2DM notifications not working prior to android 4?

I trying to make push notifications work for my android app. The server seems OK since I receive notifications on my android 4 device. But I have other devices with android 2.2.1 and 2.3.4 that don't receive the notifications.
Here's my C2DMReceiver :
package vex.android;
import java.io.IOException;
import vex.android.settings.Local;
import vex.android.tool.Resources;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
import com.google.android.c2dm.C2DMBaseReceiver;
public class C2DMReceiver extends C2DMBaseReceiver {
public C2DMReceiver() {
super(Local.PushNotificationEmail);
}
#Override
public void onError(Context context, String errorId) {
Log.e("VEX-PUSHNOTIFICATION", "Error " + errorId);
}
#Override
protected void onMessage(Context context, Intent intent) {
String saleTitle = Resources.getString("pushnotificationtitle", context);
String saleMessage = intent.getStringExtra("salemessage");
String SaleId = intent.getStringExtra("saleid");
String isMultiSale = intent.getStringExtra("ismultisale");
Boolean multisale = (isMultiSale != null && isMultiSale.length()>0) ? Boolean.parseBoolean(isMultiSale.trim()) : false;
Integer saleid = (SaleId != null && SaleId.length()>0) ? Integer.parseInt(SaleId.trim()) : -1;
if(saleMessage == null || saleMessage.length() <= 0 ) saleMessage = Resources.getString("pushnoticationmessage", context);
createNotification(context, saleTitle, saleMessage, saleid, multisale);
}
public void createNotification(Context context,String SaleTitle, String SaleMessage, Integer saleid, Boolean multisale) {
NotificationManager notificationManager = (NotificationManager) context
.getSystemService(Context.NOTIFICATION_SERVICE);
Notification notification = new Notification(R.drawable.applicationicon,
"Message received", System.currentTimeMillis());
// Hide the notification after its selected
notification.flags |= Notification.FLAG_AUTO_CANCEL;
Intent intent = new Intent(context, MainApplication.class);
intent.putExtra("saleid", saleid);
intent.putExtra("ismultisale", multisale);
PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT); // without flag a changed saleid wont be passed
notification.setLatestEventInfo(context, SaleTitle, SaleMessage, pendingIntent);
notificationManager.notify(saleid, notification);
}
#Override
public void onRegistered(Context context, String registrationId)
throws IOException
{
Local.setRegistrationId(registrationId);
}
#Override
public void onUnregistered(Context context)
{
Log.i("VEX-DEBUG", "successfully unregistered with C2DM server");
}
}
I think the problem is there because event if I send the notification manually (with curl) it doesn't work with android 2.2 and 2.3. Any idea? Thanks

I've not had any problems using C2DM on devices on older Android versions.
I suggest you get more devices to test with, and check your code - the problem is not an issue of a lack of C2DM support for older devices - it works on Android from v2.2 onwards.

C2DM uses Google Messaging Service. GTalk uses this service as well. Sometimes this service might be turned off. To check all related information just type in this code - *#*#8255#*#*
C2DM is available on devices with android >= 2.2

launch activity from service when notification is clicked

I know, there are tons of these on here, but I've been trying solutions all day and haven't gotten anywhere.
Neither the example on google's docs, nor any of the 5 other ways I've found on here have worked for me at all.
As is the typical case, when I click the notification it closes the status bar and nothing new is shown onscreen.
I am creating the notification from a service and need the notification to trigger a new activity that has not yet been created.
I also will need a way to pass information to that activity via intent.
And yes... this is java for Android
What follows are the shattered remnants of my code.
package com.bobbb.hwk2;
import java.io.FileOutputStream;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.Service;
import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.IBinder;
import android.provider.ContactsContract;
import android.widget.Toast;
public class contactBackup extends Service
{
private NotificationManager nManager;
private static final int NOTIFY_ID = 1100;
#Override
public void onCreate()
{
super.onCreate();
String ns = Context.NOTIFICATION_SERVICE;
nManager = (NotificationManager)getSystemService(ns);
}
#Override
public void onStart(Intent intent, int startId) {
super.onStart(intent, startId);
// inform user that service has started
Toast.makeText(getApplicationContext(), R.string.service_started,Toast.LENGTH_LONG).show();
String data = lookUpContacts();
if( saveToSDCard(getResources().getString(R.string.backup_file_name),data) )
{
Context context = getApplicationContext();
// create the statusbar notification
Intent nIntent = new Intent(this,contactViewer.class);//Intent nIntent = new Intent(Intent.ACTION_MAIN);
nIntent.setClass(context,contactViewer.class);
//nIntent.putExtra("data",data);
Notification msg = new Notification(R.drawable.icon,"All contacts records have been written to the file.",System.currentTimeMillis());
// start notification
//PendingIntent pIntent = PendingIntent.getService(getApplicationContext(),0,nIntent,PendingIntent.FLAG_UPDATE_CURRENT|Intent.FLAG_FROM_BACKGROUND);
PendingIntent pIntent = PendingIntent.getActivity(this,0,nIntent,0);
msg.flags = Notification.FLAG_AUTO_CANCEL;
msg.setLatestEventInfo(context,
"success",
"All contacts records have been written to the file.",
pIntent);
nManager.notify(NOTIFY_ID,msg);
}
}
#Override
public void onDestroy()
{
nManager.cancel(NOTIFY_ID);
super.onDestroy();
}
#Override
public IBinder onBind(Intent intent)
{
return null;
}
// function returns string containing information
// from contacts
public String lookUpContacts()
{
...
}
public boolean saveToSDCard(String fileName, String data)
{
...
}
}
I can only hope that whatever is causing my problem is something fixable and not more of the crazy glitches I've been getting with eclipse (which no one else seems to have ever seen >:U )
If you can help me solve this problem, please share.
If you can't help with this specific problem but feel obligated to say unrelated things about posting, styles, topics, or good practice, then DON'T
Thank you :D

Edit:
You're going to have to add a flag for FLAG_ACTIVITY_NEW_TASK:
nIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
This is because you're launching from outside your app (from the system notification bar).

This is what happens when people overwork themselves. XD
The only reason none of the tutorials I tired worked is because I misspelled my activity name in the manifest.
Thanks for stopping by

Just add following in contactBackup(service class),
Intent nIntent = new Intent(this,contactViewer.class);//Intent nIntent = new Intent(Intent.ACTION_MAIN);
nIntent.setClass(context,contactViewer.class);
nIntent.putExtra("data",data);
nIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
Notification msg = new Notification(R.drawable.icon,"All contacts records have been written to the file.",System.currentTimeMillis());
// start notification
//PendingIntent pIntent = PendingIntent.getService(getApplicationContext(),0,nIntent,PendingIntent.FLAG_UPDATE_CURRENT|Intent.FLAG_FROM_BACKGROUND);
PendingIntent pIntent = PendingIntent.getActivity(this,0,nIntent,0);
msg.flags = Notification.FLAG_AUTO_CANCEL;
msg.setLatestEventInfo(context,
"success",
"All contacts records have been written to the file.",
pIntent);
nManager.notify(NOTIFY_ID,msg);
then get value in contactViewer class,
as,
String s=getIntent().getStringExtra("data");