Android :: Does Not Support Colored LEDs
Oct 20, 2009
I am the developer of a heavily used application (over 110.000 active installs) and got one problem with the Android platform. One of the features in my application uses the normal way of the Android SDK to display a LED notification with a selectable color. The color can be set by ledARGB flag in http://developer.android.com/reference/android/app/Notification.html. This had been working with the emulator, the HTC G1 and the HTC Magic (myTouch) but now users starting to report that the HTC Hero does not show up different colors. (although the charging LED for the HTC Hero is orange and the normal notification color is green). The same thing occurs for setting a vibrate pattern. (flag -> vibrate in http://developer.android.com/reference/android/app/Notification.html) This does not work on the HTC Hero US. (it does work on the EU/GSM version of the Hero).....
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Nov 14, 2009
So I know Gmail always comes up as a green LED on my Droid, and that's fine. Also, I use Handcent SMS, and I can change the color of notification on that, so I have it set to pink (seemed like fun at the time.) I'd love an app that would let me choose the colors of other notification LEDs. Anyone know of one like that? I tried using the Market to search for notification and LED, but didn't find anything.
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Sep 13, 2010
At the moment the LEDs that light up the keyboard of the G1 (HTC Dream) are very quick to turn off, I time it at six seconds. This is a pain when using the phone in the dark as you must press a button in order to turn the lights back on if you look away even for a very short time. Since my G1 is rooted I have access to the system files and when using adb to open a shell (adb shell) to the USB connected phone I can set the brightness file to a positive value using echo 1 > /sys/class/leds/keyboard-backlight/brightness. This keeps the keyboard on, until the screen is set to turn off (two minutes on my phone). When I attempt the same using a Terminal Emulator or writing a simple app which should execute the same it does nothing despite both having root access. Why is this?
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Jul 2, 2010
I'm still pretty new to using Android, but I decided that my first application would be a simple flashlight app for my new Incredible. Unfortunately, it seems to be more difficult than I had originally thought.
It seems that there's no way to access the LEDs through the SDK, at least not without a bunch of weird hacks to make the phone pretend that it's taking a picture. Even then, I can only get the LEDs to turn on. They only turn off if the phone is put on hold, and doing so breaks all camera-related apps until the phone is rebooted.
So, I was wondering if accessing the LEDs through the NDK was possible, or if there was any other camera-related APIs that would seem to do what I want.
I've looked at other code for other flashlights, so it looks like it's a hardware-based problem. I figured I'd give up because it doesn't appear to be possible, but I thought I should ask here first on the off-chance somebody knows something that I don't.
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Jun 30, 2010
Has anyone had any issues leaving the LEDs on (using Lampu) as far as heat from the phone? I can assume there was a reason that HTC didnt allow the LEDs to be on for video recording. Not sure if its just current draw or possible heat/damage to the driver circuit for the LEDs.
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Aug 31, 2010
Is the market link to a ROOT ONLY app that you can turn off the LEDs at will?
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Sep 25, 2010
Can someone explain what the different colored text means for each element? Should this be obvious? It seems to be more than an association with certain elements. Or even if just that, does it help you figure out new combinations, or just indicate what's already been combined?
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Aug 22, 2010
I'm looking for an app that uses the camera leds for the flashlight instead of the screen. Anyone know of one?
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Jun 27, 2010
Every now and then when I press the power button to put my Incredible to standby and/or after the 1 minute timeout. The screen turns off as usual but sometimes the LEDs for the buttons stay lit. Sometimes if left alone long enough they will turn off on their own, but most of the time they stay on till I bring the phone out of standby and then put it back into standby. Is anyone else getting this? Is there a way to fix it?
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Sep 26, 2010
Is there any program or other way do turn off the screen LEDs for example when docked at night? LEDs Hack from the market has an option for Hero with Froyo. I emailed the developer, but didnt know if anyone here had any solutions. I'm running KF v35-1 btw. I was looking at replacing my clock on my bedside table with a dock that would hold the phone upright so I could see the time. I can keep the display on, but wanted the bright lights on the front off. With the program below, I can turn off all LEDs except the white ones behind the home, menu, back and search keys. I tried all the different phones. One of the first times I tried it, the LEDs all went out and would not come back on. Did a reboot and dalvk wipe which restored the LEDs. I went back through all the devices again and could not repeat the result of getting all lights out. The Hero version can stop all LEDs except the leds i mentioned.
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Dec 22, 2009
I've seen it discussed in a thread somewhere but can't find it. Is anyone working on an app to use the menu buttons as an LED notification? The moment for me would be close to perfect if there was some way to have lights for notification. If I were a programmer I would be working my buns off to write this app.
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Sep 16, 2010
do I use the imageview as the skin of the colored listview or is there better ways to create them?
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Sep 10, 2010
Or did it take anyone else awhile to realize the Droid eye on the startup animation was the camera lens and leds? Is that animation exclusive to incredible?
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Sep 16, 2010
When using Google Sky it is possible to set the app to night mode which is nice, but as soon as you press the menu button (e.g. to search) the bright white LEDs come on and ruin your night vision. So is it possible to disable the front LEDs on the phone? Do they serve any purpose anyway?
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Sep 24, 2010
What's the status on this issue? Many of the Samsung Galaxy S phones come with a beautiful array of soft keys with LEDs that are dieing to be used as notification lights as well. For example, the T-Mobile Samsung Vibrant has 4 soft keys (menu, home, back, search). I would like to be able to set the menu key to light up at an interval of 3 seconds within the first hour of receiving a text message and light up at an interval of 5 seconds or more after the first hour of receiving a text message. Has Samsung released the necessary API? Or does Google have control over this?
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May 15, 2010
I'm developing on Android with OpenGL ES, I draw some cubes and I change their colors with glColor4f. Now, what I want is to give a more realistic effect on the cubes, so I create a monochromatic 8bit depth, 64x64 pixel size PNG file. I loaded on a texture, and here is my problem, which is the way to combine the color and the texture to get a colorized and textured cubes onto the screen?
I'm not an expert on OpenGL, I tried this:
On create:...................................
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Sep 10, 2010
I am writing to a canvas from a thread.
public void draw(Canvas canvas) {
Paint p = new Paint();
p.setAntiAlias(true);
p.setTextSize(30);
p.setColor(Color.WHITE);
p.setTextAlign(Paint.Align.CENTER);
canvas.drawText("Centered", xCentre, yCentre, p);
}
My problem start when I have a multi colored SpannableStringBuilder which I want to write to the canvas, and I have no idea how to do this. SpannableStringBuilder has a drawText() method which I have been unable to use. Or is there some other method to write a string to a canvas where some of the letters have a different color?
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Dec 30, 2009
My camera won't take properly colored pictures any more. It started out as an intermittent problem but now it's just all the time and it really bugs me. The camera on these phones sucks to begin with but it did come in handy some times. This is the kind of pictures it takes now.
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May 7, 2010
Whenever a button is clicked the default behavior is that the button's background changes to yellow in color.
Is it possible to override this?
eg. in a game if the user clicks a "ok" button and if his answer/ choice is correct, then the ok button should change to "green" color just for fraction of a second (by default it is the yellow color on button click in android). And if the answer is wrong then it should be "red" in color.
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Oct 28, 2010
I am trying to use one of these algorithms to convert a RGB image to grayscale :
The lightness method averages the most prominent and least prominent colors:
(max(R, G, B) + min(R, G, B)) / 2.
The average method simply averages the values: (R + G + B) / 3.
The formula for luminosity is 0.21 R + 0.71 G + 0.07 B.
But i get very weird results ! I know there are other ways to achieve this but is it possible to do this way ?
here is the code...
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Feb 25, 2009
I'm developing a coloring book app, how do I ensure that the black outlines of my drawing are not colored by the paint brush? I thought of decreasing the alpha value of the paint brush to show the black outlines when painting over them but upon painting the same area again, the black outlines will be painted over.
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Oct 19, 2010
I'm about 98% sure I've changed what color my LED light (the one that comes on when you're charging) was for notifications. But now I can't find an option or setting anywhere to do it... did they remove this feature with the 2.2 update or something?it may have been a setting that was in handcent but i'm not sure
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Sep 10, 2010
Anyone know how or if you can safely change the color of the notification bar? I saw a thing on another forum to download and do some stuff to get it black but it seemed kind of sketchy at the moment.
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Oct 28, 2010
Can anyone help me out on getting color icons onto my Rooted Froyo (stock) deodexed with S-off. Specifically Gmail, Gtalk, Mail and Messages? The Gtalk one I do not have the right size or transparent.
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Jun 4, 2010
just picked up my EVO earlier this morning. Let it charge for a while before turning it on. I have a very thin rainbow colored line running vertically down the screen. Has anyone else had this problem? I had best buy install the invisible shield when I picked up the phone, so I wanted to wait a little while before taking the phone back. I'm hoping this works itself out, but I am thinking that this is going to be a display issue and I am going to need a new unit.
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Aug 2, 2010
How do I get that cool animated wallpaper where different colored lights are running north/south and east/west. I thought it came with the update 2.2
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Jan 13, 2010
it turned my hero blue the paint has transfered on the phone. i always have the case on so u cant see it but if u take it off its ugly.anyone know where i can order a new battery cover?
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Sep 2, 2010
So I've noticed a lot of people rocking the colored text icons in their dock.I have the dreamly dock text icons, but its simply black/white and was wondering if someone can post a link to the icon pack where I can get the ones with different colors in them.
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May 15, 2010
So I've recently flashed 2.1 DE03 with custom recovery, and rootv7, then Calkulin's updated 1.4 ROM for de03.
Anyway every few mins it randomly goes sepia colored and reboots itself. Anyone else having a similar issue?
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Oct 21, 2010
My device is suddenly power of
and now just stuck in 3 colored screen
i can't reinstall the stock rom
because pc can't see it
when i connect the cable
it's turn from serial to usb
but pc can't sync with it....
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