The following code works great on a Motorola Defy with Android 2.3.3
However it's not working on a Nexus 4. The LED itself should be fine, the app color led tester from the market works.
NotificationManager notif = (NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);
final Notification notification = new Notification();
notification.ledARGB = Color.RED;
notification.ledOnMS = 1000;
notification.ledOffMS = 300;
notification.flags |= Notification.FLAG_SHOW_LIGHTS;
notif.notify(1, notification);
Does anybody know what will do the trick here?
I just have tested your code on my Nexus 4 and it's work. But before the test I have locked my phone. Probably this LED will be highlighted only when screen is off.
Related
So I am writing an app that will use the LED to notify users of anything when the screen is OFF. Below is how I used it to work:
NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
Notification notification = new Notification();
notification.ledARGB = 0xFFFFFF00;
notification.flags = Notification.FLAG_SHOW_LIGHTS;
notification.ledOnMS = 100;
notification.ledOffMS = 100;
notificationManager.notify(Constants.LED_NOTIFICATION_ID, notification);
It works fine, but problem occurs when my device (Galaxy S5) has missed calls, and the stock LED notification for missed calls overrides my LED setting all the time. Is there a way to override the stock LED settings, and have it display mine instead? I've tried fiddling with
notification.priority
but that doesn't seem to do anything. Any help would be appreciated. Thanks!
Is there a way to override the stock LED settings, and have it display mine instead?
Not in general. Control over the LED is up to the device manufacturer, not you. Or, quoting the documentation, "Since hardware varies, you are not guaranteed that any of the values you pass are honored exactly."
Also, bear in mind that not all devices have LEDs that a Notification can control, sometimes because the device does not have an LED at all.
I'm trying to use the LED on my notification and it's not working, i have this code:
NotificationCompat.Builder nBuilder = new NotificationCompat.Builder(getApplicationContext());
nBuilder.setLights(Color.CYAN, 1000, 500);
The entire notification is working, like ContentTitle, ContentText and the notification is shown, but only the LED is not working.
Is there anything wrong with my code ? Should i use the Notification instead NotificationCompact.Builder ?
The LED light for notifications is turned on by the OS in the device only if the notification is triggered while the device screen is off.
Your code can not work, because you have to pass three variables:
the color
if turning on the led is on
if turning off the led is on
if you enable 2 and 3 your led will be blinking, if you disable 2 and 3 the led will be turned off
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(context );
mBuilder.setLights(Color.RED, 1, 1); // will blink
That code seems OK, for the APIs before 26.
You might try adding Notification.FLAG_SHOW_LIGHTS
NotificationCompat.Builder nBuilder = new NotificationCompat.Builder(context);
nBuilder.setLights(Color.CYAN, 1000, 500);
Notification notif = nBuilder.build();
notif.flags |= Notification.FLAG_SHOW_LIGHTS;
NotificationManagerCompat notificationManager = NotificationManagerCompat.from(context);
notificationManager.notify(0, notif);
Also make sure that you do not swipe down to preview the notification, otherwise the LED will be off when the display goes black.
The notification bar in my application shows only the small icon in the ticker (as it should). However, when the "shade" is pulled down, it shows both the small icon from the ticker, as well as a large icon that I set in the Notification.Builder. Here's my code:
if (Build.VERSION.SDK_INT > 10){
notification = new Notification(R.drawable.ic_stat_mintchip,
"This is a test",
System.currentTimeMillis());
notification.largeIcon = (((BitmapDrawable)c.getResources().getDrawable(R.drawable.ic_launcher)).getBitmap());
notification.defaults |= Notification.DEFAULT_ALL;
notification.number += 1;
notification.flags |= Notification.FLAG_AUTO_CANCEL;
} else {
notification = new Notification(R.drawable.ic_stat_mintchip,
"This is a test",
System.currentTimeMillis());
notification.flags |= Notification.FLAG_AUTO_CANCEL;
notification.defaults |= Notification.DEFAULT_ALL;
notification.number += 1;
}
}
I don't quite know why this is happening. Any assistance?
I think the issue here is possibly that you're not using the Notificaiton.Builder class. Here's a small example of what you could do (you would have to insert your own variables though, and set the other properties that you used such as vibration):
Notification.Builder nb = new Notification.Builder(context)
.setContentTitle("title")
.setContentText("content")
.setAutoCancel(true)
.setLargeIcon(largeIcon)
.setSmallIcon(R.drawable.small_icon)
.setTicker(s.getText());
NotificationManager nm = (NotificationManager)context.getSystemService(Context.NOTIFICATION_SERVICE);
nm.notify(100, nb.build());
Another issue i had in android lollipop is that the small icon was displayed next to the large icon. To solve it - just don't set the large icon! Use only the small icon setting.
http://developer.android.com/guide/topics/manifest/uses-sdk-element.html
if you set your max sdk version in android manifest to 19(i.e KitKat) Your app will no longer display notifications meant for lolipop
I'm using a notification to let the user now that the service is still running. Now I'd like to use the notificationlight to remind the user. (because it's fancy)
The notification works fine, but the notification light does nothing. Other applications work fine with the notification light, (gtalk, facebook)
it's more or less the example code for notifications with addition of these flags:
notification.ledARGB = 0xff00ff00;
notification.ledOnMS = 100;
notification.ledOffMS = 100;
notification.flags |= Notification.FLAG_SHOW_LIGHTS;
notification.flags |= Notification.FLAG_NO_CLEAR + Notification.FLAG_ONGOING_EVENT;
mNotificationManager.notify(NOTIFICATION_ID, notification);
and
notification.defaults |= Notification.DEFAULT_LIGHTS;
instead doesn't work either.
I'm debugging on a Galaxy Nexus with Android 4.0, but the app's target is Android 2.3.3
EDIT:
could this be a problem of permission? If yes, which one? I looked through all and found no matching permission for the notification light.
I think there is an error with the + operator, you need the OR:
notification.flags |= Notification.FLAG_NO_CLEAR | Notification.FLAG_ONGOING_EVENT;
EDIT: and if you are using flags, I think the right one should be:
notification.flags |= Notification.FLAG_SHOW_LIGHTS
On jelly bean devices, led only works if notification priority is set to max or default, please check again. Following snippet of code is working fine for me on jb devices.
notification.setLights(0xFF0000FF,100,3000);
notification.setPriority(Notification.PRIORITY_DEFAULT);
Here I'm showing blue color led for notification which will remain on for 100 ms and off for 3000 ms till user unlocks his device.
And check if you are using NotificationCompat (compatibility) class than ignore setDefaults method and use SetLight, SetSound, Setvibration, etc
My old Nokia phone was flashing hardware buttons when I missed a call. So I was able to understand that I have missed a call just by looking to phone. With my new Android phone I have to reach my phone and wake the screen to see if I have missed a call.
I have searched Android market but could not find exact application to solve my problem. So I have decided to write it. The question is how can I turn on and off back lid of hardware buttons of a android phone?
I have googled it but could not find a clean answer.
Thanks in advance.
Android does have notifications for that purpose, the backlight is not thought to be controlled through the API (you could do it on rooted devices but thats another story).
Personally, I dedinitely do get notifications for missed calls, and my notification LED blinks. However, you can implement your own notifications:
NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
// create a new notification
CharSequence tickerText = "Missed call";
long when = System.currentTimeMillis();
Notification notification = new Notification(icon, tickerText, when);
// control how the notification led should behave
notification.ledARGB = 0xff00ff00;
// blink for 300ms every 1s
notification.ledOnMS = 300;
notification.ledOffMS = 1000;
notification.flags |= Notification.FLAG_SHOW_LIGHTS;
// usually you also want to create a PendingIntent and attach it
// with notification.setLatestEventInfo
// finally, post the notification to the notification manager
notificationManager.notify(HELLO_ID, notification);
There are many other options for notifications, like vibration or FLAG_AUTO_CANCEL, but they are documented very well ;-)
On a rooted device, you could execute the following to control the backlight (however, I would recommend sticking to the intended way, which are notifications):
su
echo 25 > /sys/class/leds/button-backlight-portrait/currents
echo 25 > /sys/class/leds/button-backlight-landscape/currents
where 25 would be the brightness. But admittetly, I don't know for sure if this would even work on all devices.