This appears to be called EdgeEffect and is used as a visual indicator when the user over-scrolls.
See relevant images on Google Images here.
A book commenting on the glow effect produces.
A question on Stack Overflow.
Capacitive and resistive touchscreen technologies
Today's multi-touch screens are capacitive, unlike the resistive touchscreens from a decade ago. They work a bit like the way you can feel a static charge with the hair on your skin. The screen has a charge inside it, and when your finger comes near it, the capacitance of your finger attracts this charge. ...
You don't have to continue working blindly, you can use Droid@Screen: it shows the screen of a real or emulated Android device on a computer running Windows, Mac OS or Linux.
Droid@Screen is a stand-alone Java Swing GUI application that shows the screen of an Android device on a computer. Its author says that its typical usage is showing an app demo or ...
My solution is tested on Stock Android 4.4.2 and Stock CyanogenOS 12 (5.0) of OnePlus One, and should work for Android 4.3 and above (based on this answer).
I've mentioned wherever root access is required.
This answer has been taken from my answer on a bit different question here.
I have used the following comment as the ground to work on:
There are some hotkeys listed for ICS, which hopefully still work with Kitkat:
Rotating the screen: (to get that operate we must to have activated “Auto-rotate screen”)
Press F12 two times in less than 2 seconds = Rotate 90º to the LEFT.
Press F11 two times in less than 2 seconds = Rotate 90º to the RiGHT.
Press F10 two times in less than 2 ...
SnooZy Charger (also in the Play Store) takes care of this. The free app (as in beer and speech) that lets you manage behavior during charger connection and disconnection.
It requires no permissions, but does require you giving it device admin permissions. These permissions are only used for to control device locking, as verifiable in its source-code. From ...
As suggested already, this graphical "shadow" effect is Edge Glow colour, and its part of the material design by Google.
After the introduction of material design by Google many new UI elements have been introduced. Material design is based on the interaction and movement of colours and objects in real world rather than synthetic unnatural phenomenon. ...
It seems like others have had this problem as well:
It is a bug in Android 4.2, specifically with the Samsung Galaxy Nexus. I imagine ...
You can always use some mathematics to obtain screen size:
X = sqrt ( Z^2 / (1 + (VR/HR)^2) )
sqrt = Square Root √‾‾‾
X = screen width
Z = diagonal screen size (7" for Nexus 7)
VR = vertical resolution
HR = horizontal resolution
which for Nexus 7, we have:
Z = 7"
VR = 1280
HR = 800
X = sqrt ( 49 / 3.56)
X = 3.71 ...
Since Android 5.0 Lollipop, the feature is built-in as one of accessibility options.
Below Display section, toggle Color inversion.
After toggling it for the first time, the "Invert colors" toggle will be added to the quick settings menu.
As life of LCD screen is measured in hours of its usage, keeping screen turned on does consume some of its life hours.
But, average life of LCD screens range from 30,000 hours to 60,000 hours, so I don't think it would a matter to you.
There are two ways of doing this, depending on if you have root or not on your device.
If you use root
If you have rooted, run:
input keyevent 26
In any good terminal emulator.
If you have not rooted
If you haven't rooted, either root, or:
Install ADB (Instructions vary between windows, Mac and Linux)
Enable "USB Debugging in settings > developer ...
If you know for sure your phone can be powered on, then there might just be another doable (albeit technical) way. I've extracted photos and contacts from another S4 of my classmate a while ago using this. I'll describe it and let you decide whether you can handle it.
While in the blind, get to Download Mode by using the key combo.
Load a custom recovery ...
I've managed to deal with this problem by performing a "soft reset".
Hold down the power button for around 30 seconds, the device should start a soft reset (i.e. you don't lose any data/settings etc.) and reboot.
Why it blocked and prevented me from performing a screen unlock remains to be explained.
Yes, you can connect an android phone to a TV or a computer monitor. At least if you have a new enough TV or monitor, and not a ten year old TV like I do. :-)
My android phone came with a HDMI cable to use when connecting phone to TV. I have connected it many times to my computer however, using a mini USB cable. But I would be able to use the HDMI as well, ...
My answer for you is twofold; there are innate downsides to off-brand devices but - most importantly - your use case (development and application purposes) might make off-brand Android phones a poor choice.
This is from my experience with the phones (I have a lot, having lived in Asia for years, and seeing a lot here in the States)
First, the general ...
Download MX Player
Play YouTube/Sdcard video using MX Player.
Press Menu button (or the 3 dot icon), and then select Play
Make sure "Background Play" is checked
Now, you can press Home Button and listen in lock screen.
There is also a shortcut for enabling Background Play, which is tapping and holding the Play button, instead of just tapping it to play a ...
The short answer is NO. Unless you try to go over default brightness (which could potentially burn the LED), your screen leds are desgined for changing brightness and colors.
Leds work differently than most lightbulbs and flicker has much smaller effect on them.
Longer version of explanation
First of all, leds do not "flicker" the way fluorescent light ...
Directly start WhatsApp with the correct activity intent via ADB:
adb shell "su -c 'am start com.whatsapp/.qrcode.QrCodeActivity'"
Then hold your camera in front of the QR Code @ http://web.whatsapp.com/.
a rooted Android phone (outside scope of this post)
working adb (like Minimal ADB + Fastboot or ADB for Chrome)
working SuperUser su ...
there is a setting in developer options on your phone that allows you to keep your display awake whilst charging it. It is enabled by going to settings, then scrolling all the way down to about. From there scroll all the way down to build number and tap it 7 times to enable developer mode. Next, click the back button then click on Developer options. Click ...
So you want to know the display area ..
(A.) The non-masked (clear) area of the front face:
A simple metric ruler, and ASUS Nexus 7, gives you ..
Answer: 152mm x 95mm
(B.) The area of active pixels, on the IPS LCD display:
display pitch: 216 dpi (pixels per inch, leading edge to leading edge)
pixel size: 96% of pitch (guesstimate, without ...
You can go to Settings > Display and then un-check Auto-Rotate. Since that's rather inconvenient, I installed an app called Power Toggles which makes it possible to force lock the screen orientation to landscape or portrait from the notification bar very easily.
I particularly liked this app since its very lightweight, only about 248kb. It also makes it ...
From your description, there are two obvious possibilities. The first is that some static electricity or oil on the touch screen is causing it to think you're touching it. Try giving the screen a good wipe. Also, earth yourself by holding a metal water pipe with one hand, and cover the screen with your other hand.
The alternative is a manufacturing defect ...
If you are using a custom ROM (like CyanogenMod) or stock Android go to Settings>Display>Automatic backlight. Click on enable and select the window length option to change the time according to your needs.