[Q] Mapable area under screen? - Nexus 4 Q&A, Help & Troubleshooting

Alright, this may sound like a stupid question, but I noticed that all the HTC One phones use one touch panel for the capacative buttons and the screen, and that people have been able to map usually 'dead' zones on the extended part of the digitizer not over the screen to different buttons.
My question is this: Does the digitizer on the Nexus 4 extend off the visible screen, and if so, is it possible to modify the kernel to accept touches on these areas, possibly for gestures?
Thanks in advance! :good:

Based off my limited knowledge of the phone, I don't think they have an extended digitizer thing over the bottom since there is the notification light there. BUT, it IS based off the Optimus G that does have those touch sensitive buttons in that region.

Related

Poor touch recognition on screen corners

Am I the only one that seems to be having a major issue with this? It comes up more with the added on screen keyboard in 1.5, it seems.
The corners of the G1 screen do not respond to touch at all, and I find myself always having trouble hitting the keys on the corners of the virtual keyboard. Applications that require you to touch any corner of the screen with precision (ie tic-tac-toe) are annoying as well because it's difficult to get it to work.
Is there any fix in sight or is it a hardware limitation?
definitely a hardware limitation.
hardware limitation means: normal hardware limitation or limited due failure????
I only experience this problem with the right edge of my phone. The top, left, and bottom don't have any problems.
Touch also seems to be less sensitive when the phone is rested flat.
My phone has the sensitivity problem on the edges too (mostly on the right and top sides).
For example, it's almost impossible to drag an icon to the left screen, because it doesn't seem to reach the threshold area.
The protective screen (boxwave anti-glare) made the problem even worse, but since it's much more comfortable than the glass, I won't be taking it off.
The easiest way to test all this is to use the whiteboard application.
So, I ask the developers: Please don't place the buttons on the edges of the screen!
The worst apps in this regard I've seen so far were the Video player (don't remember its exact name, its seek slider was unusable), and the sudoku with the number chooser in the bottom. OpenHome's app slider has the same problem.

[Q] Using capacitive buttons while touching the screen

Hi there!
I'm having issues while coding for my Evo. While touching the screen, the Evo interprets me touching the buttons as another press on the screen instead of a onKeyDown, onBackPressed, etc. (It actually sets the MotionEvent pointer count to 2, and I can get the co-ords that I'm touching that are off the main screen, for example, 830*190 when touching the back button.)
Short of coding in the locations of the buttons (which would be different for every phone with capacitive buttons, if they all have the same issue), is there any way to get around this? Does anyone else have this issue with a different capacitive buttoned device?
The nexus has the same problem. It seems that the buttons are a extension of the actual screen. Multitouch doesn't support more than 2 touches on HTC phones. And even that is problematic because the phone registers actualy one big touch and determines the fluctuations in its size. So if you want to pinch to zoom for example the phone will compare the size of the touch between your fingers. Basically you've got a hardware limitation and there's nothing you can do about it.
Sent from my HTC Desire using XDA App

[Q] Disabling certain area of touchscreen?

Hello everybody,
quite time ago I received a 1st gen. Nexus 7 3G with cracked glass. The lower-right corner wasn't receiving taps, but I got used to that.
Now practically I can't use my Nexus, because it started to self-recognise ghost taps near the cracked point. A lot of these taps.
Is there any possibility of disabling the selected touchscreen area until I replace the broken part?
Regards.
Uhm... A bump?
The only possible solution that comes in my mind is an app that practically overlays any other app and filters the touches from a selected area of the screen. I don't think there are any of this kind of app or too much other solution, so I suggest you to replace the screen as soon as possible.

[Q] Nexus 4 Ghost Touch Workaround Idea

Now I know this problem has been asked before but after some extensive searches I can see there are no clean fixes for this.
My Nexus 4 (Android 5.0.2 LiquidSmooth ROM) has started showing ghost touches at the bottom part of the screen. I know there are a lot of explanations available such as digitizer not working, battery being too old etc. But I'm not interested in these hardware issues/fixes.
I have isolated the area of effect as the bottom ~160 pixel height of the device. I then proceeded to use the ADB shell command
wm overscan 0,0,0,160
which removed that portion from the UI. This fixed the effects these phantom touches have on the apps or UI. But a problem still remains that these ghost touches happen in too many numbers and this leaves other usable areas of the screen insensitive to touch. I am guessing this is due to the multi touch limit being reached in that bottom unused part itself. Multi touch testing apps dont pick up touches on the top part of the screen
So my question is, is it possible to remove a part of the screen from the System itself? Ideally a thick black bar of unused area, leaving me with a shorter yet fully working screen? Or atleast is it possible to turn off touch response in that lower part of the screen so that it doesnt max out the multi touch limit?
My Nexus 4's is same too
I think, that ghost touch will work from Screen Digitizer. My Nexus 4's screen digitizer was non-LG's digitizer, it was fake. I need to change that digitizer
I workaround this issue avoid using undervoling in the kernel, and avoid lower temperatures in phone, yes as you read ... this issue give my crazy when my phone was to hot and I tried to cold my phone using one ice cube in screen and back, the temperature of the phone down but ghost touches appears again, so played some videos to warm the phone again and dissapear again.
Don't ask me about how it works, or relation with screen, digitizer or battery, I don't understand but help me to workaround the issue.

Problem with the touch screen

I have a LG G2 D802.
It has never fallen, doesn't have any significant marks of usage but my screen has a kind of row (1 cm) in the middle of the screen, from the left to the right of the phone that does not respond to my fingers.
If I draw a line from up to bottom, there will be a gap right on that "line".
Is there a way to see if this is something related to software?
Is this solvable with a new kernel?
Is this a real problem that will require a new touch screen?

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