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40

To understand why Nexus 7 can show more content than the Galaxy Nexus, I'll first explain two concepts: screen density and density-independent-pixel. But before we go into technical details, it may be worth to clarify the design goals of using density-independent-pixels. The goal is to define a UI that is similar in dimension across devices, regardless of ...


36

On OLED, AMOLED and Super AMOLED screens: Yes LCD screens: No


16

Samsung removed "Stay Awake" from TouchWiz back in the first OTA for the Galaxy S1. Other ROMs like CyanogenMod still have it, and other AOSP based ROMs as well. Be very careful using any kind of "Stay Awake" options with these devices that have the Super AMOLED screens. I used to use it when developing and testing the apps. I now have a "burn" in the ...


15

This depends on the screen technology. For instance, (it was said that) Android 2.3 Gingerbread has dark theme since Google's latest flagship device Nexus S uses (Super) AMOLED display which consumes less energy when displaying dark color since AMOLED produces its own light and darker color emits less photons. Contrasts with LCD display which uses a ...


13

Settings > Applications > Development > Stay awake


13

Hey, I just ran a load of test to figure this out. They are vaguely scientific tests! I figured out that I was saving 20% battery by switching to dark wallpaper and dark themed apps. Have a look through my write up, you should be able to work out the saving on your phone: http://blog.stevemould.com/phone-battery-save-black-wallpaper/


12

It depends, some Android devices have an advanced setting WiFi Sleep Policy under Settings -> Wireless -> Wi-Fi Settings -> [Menu Button] Advanced -> Wi-Fi Sleep Policy But I am not sure if this is a vanilla Android feature or an manufacturer modification. At least the Galaxy S series has this setting. Data networks are usually fully active. ...


11

Try looking at a black picture in the dark. With AMOLED the picture should be pure black. With SLCD you should see the backlight making the picture look greyish.


11

There just was a Blog on Land of Droid covering this issue. The author summed up a few conditions under which this "flicker" occurs: back-light is dimmed under 30% a weak WiFi signal the device is accessing the net According to that report, these 3 things are "AND-connected" (i.e. the flicker occurs when all of the 3 conditions are met). He's also hoping ...


10

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 ...


9

I use Quick Settings and there's an option to toggle auto-rotate. I have it so the shortcut to Quick Settings lives in my Notification bar so to toggle it requires a swipe, two taps and the back button to toggle it and get back to the app I was in. If you wanted to reduce this down to tap home, toggle, tap return if you use QuickDesk which lets you put ...


9

If you don't mind paying a few bucks, I highly recommend Tasker. This automation utility allows you to set up many built-in (and some 3rd-party app) Android actions based on various parameters, including time of day. In Tasker you will need to create 2 separate profiles, and to each add 2 actions. 1st action will be identical in both profiles - disabling ...


9

I have checked on my two Ice Cream Sandwich Devices (Stock Xoom and Droid 3 running CM9 Beta). I have, under Settings > Developer Options a Stay Awake option. Which keeps your device awake when charging. This will work if your device charges over USB (my Xoom does not, for instance). However, should this option not be there, we can turn to apps for ...


8

I'm not sure about the Wildfire, but on my Desire HD when I take the phone from my face, the motion sensor detects it and re-awakens the screen automatically. I'm not sure if it's a setting, a Froyo feature, or maybe an HTC sense feature.


8

No, what matters for clarity is acuity, or the "number of pixels versus screen size versus viewing distance". A 800x480 image shown on a 100" monitor seen 30 cm viewing distance would look awfully pixelated, while 480x320 screen on a 2" monitor seen at the same viewing distance would look very sharp. LG Optimus S has a 480x320 pixels on a 3.2 inch screen ...


8

Sounds like a hardware problem (assuming the lines extend all the way across the screen). Could just be a bad connection.


8

At least in vanilla ICS it's in Settings -> Developer options -> Stay awake, correct me if it's not there in GSIII. If it's not there, you can try a couple of apps that can do this, at least on older Galaxy series phones. StayAwake Stay Awake Widget


7

Look at something black (e.g. an image of only black) on your phone, and shut off the lights. If you've got an AMOLED screen, it should be pure black (virtually no light emanating). With an LCD it will be significantly brighter/greyish.


7

That's because the pixels per inch (PPI) is different between them. The higher the PPI, the higher the quality but at a cost of (relative) smaller screen size. So the Nexus 7 has 216 pixels per inch while the Galaxy Nexus has 316 pixels per inch. The resolution isn't everything, you also have to consider the density of the pixels. High PPI values have the ...


7

The 1280x800 pixels count for the whole display, including the black bar for the buttons. Google decided to stay flexible by moving physical buttons to the touch screen permanently. Benefits: No capacitive buttons needed (cheaper?) Better user experience: Rotating 90,180,270 degrees rotates also the virtual buttons Less frame space (the button's space ...


7

In Settings, go to Developer options and un-check the Show CPU usage:


6

Unfortunately you can't change the number of screens and still use the HTC Sense UI. At least not in any of the versions I've seen. You can uninstall it or turn it off, but then you won't have free access to all of the HTC widgets, if you like those. If you really want the performance kick you'll get from less screens in total, and therefore using less ...


6

I want to run a screen saver when phone is in sleep mode. When the phone is in sleep mode, the screen is off. When we stay idle some time a black screen comes. This is built into Android. At that time I want to display some images as screen saver. I repeat, when the phone is in sleep mode, the screen is off. Is this possible? You ...


6

ICS (Android 4.0) includes the capability for "Screen Candy" that is special screens or animations that only present themselves when the phone is idle and plugged in or docked. By default, this is a hidden (disabled in most stock roms, I'd wager) feature called "Android Dreams" but enabled in most custom roms (such as AOKP or Codename Android). ...


6

Not sure what phone you've got but most of the higher end Android phones have light sensors, and you can set the screen to adjust its brightness automatically depending on the ambient light at the time. If you've got the Power Bar widget on your home screen (its one of the built-in Android widgets since Donut) just tap the far-right brightness icon until it ...


6

I don't know how to turn the screen off completely but setting the screen brightness to the lowest possible value will help with battery life. Settings->Display->Brightness


6

You already pointed to the correct lines -- the interesting ones are the two immediately before it: 10-01 18:25:44.391 V/AlarmManager( 279): sending alarm Alarm{40d4f110 type 0 com.gau.go.launcherex.theme.GalaxySTheme} 10-01 18:25:44.391 V/AlarmManager( 279): pending wakeup alarm com.gau.go.launcherex.theme.GalaxySTheme 10-01 18:25:44.411 E/power ( ...


6

The screen size is 151mm * 94mm http://forum.xda-developers.com/showthread.php?t=1760938


6

You can always use some mathematics to obtain screen size: X = sqrt ( Z^2 / (1 + (VR/HR)^2) ) where: 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 so: X = sqrt ( 49 / 3.56) X = ...


6

It seems like others have had this problem as well: http://www.reddit.com/r/GalaxyNexus/comments/19y0a9/galaxy_nexus_screen_turn_on_durring_lock_screen/ http://productforums.google.com/forum/#!topic/mobile/PA5JZH-Oj4o http://code.google.com/p/android/issues/detail?id=39625 It is a bug in Android 4.2, specifically with the Samsung Galaxy Nexus. I imagine ...



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