Database Develop

Noobian primer?

Hello
Im a Noob that has limited tech experience but has managed (with help, obviously, from everyone here) rooting and setting up wifi tether, and curious to find a resource for understanding the bigger picture when it comes to android OS. The forums are an incredible reasource but sometimes a little overwhelming, I'm looking for android 101.
-Sorry to bore ya
-Thanks
Sent from my SAMSUNG-SGH-I897 using XDA App

Android 101 in what sense, looking to dev? Looking to get a grip on your phone?

Doesn't exist, sorry. Not at least in a user friendly way.
What are you looking for exactly? Maybe can help with specifics...
Sent from my SGH-I897 using XDA App

You can try here for starts:
http://forum.xda-developers.com/showthread.php?t=619153
or here for basic phone stuffs:
http://www.pcworld.com/article/190633/android_101_a_guide_to_using_your_android_phone.html
For stuff like this Google is your best friend.

Here's some GREAT videos that show you how to do many things on the Cappy.
http://forum.xda-developers.com/showthread.php?t=877652

I really appreciate the links, this forum is such a resource.
Without a better analogy, I'm looking for a "ROOT bone is connected to the ROM bone" kinda stuff so that I can feel a little more confident when exploring the phone's potential.
As far as a specific question, I like to find an app that tells me exactly what particular spec my phone is running (O.s. version, ROM, modem, etc.)
-thanks again
Sent from my SAMSUNG-SGH-I897 using XDA App

brokenbad said:
I really appreciate the links, this forum is such a resource.
Without a better analogy, I'm looking for a "ROOT bone is connected to the ROM bone" kinda stuff so that I can feel a little more confident when exploring the phone's potential.
As far as a specific question, I like to find an app that tells me exactly what particular spec my phone is running (O.s. version, ROM, modem, etc.)
-thanks again
Sent from my SAMSUNG-SGH-I897 using XDA App
Click to expand...
Click to collapse
The link I gave you has the best videos to watch. Very detailed and shows you EVERYTHING you need to do, on both your phone and PC.
The specs on your phone are located in settings/about phone.

Can't believe we were anxiously awaiting this..

Android 4.2 doesn't even seem well thought out, let alone designed. Is Google playing the Apple game, tying us into their universe and making us take whatever the deliver?
Do they even care how many apps won't work or have to have multiple purchases to support their multi-user "security"? Should have just left the multi-user thing to 3rd party devs. They fail on this, IMO.

rootbrain said:
Android 4.2 doesn't even seem well thought out, let alone designed. Is Google playing the Apple game, tying us into their universe and making us take whatever the deliver?
Do they even care how many apps won't work or have to have multiple purchases to support their multi-user "security"? Should have just left the multi-user thing to 3rd party devs. They fail on this, IMO.
Click to expand...
Click to collapse
Google doesn't care.. Remember when 4.1.1 broke a bunch of paid apps by sticking them in the asec folder which wasn't mounted at startup? So since it wasn't mounted Android never saw the apps during boot and paid keyboards and widgets disappeared after a reboot. MONTHS went by before it was addressed. Meanwhile developers of those paid apps had angry customers and money lost because of Google
This will be the same song and dance.. Google is getting very sloppy with development and communication with developers pre-release seems to not exist.

I love it.
Sent from my Nexus 7 using Tapatalk 2

Thread Cleaned​
Lets keep personal opinions about users from different nations to yourself. This is a development forum, not a place to vent personal feelings. Now keep it on topic.​

Stop stereotyping. People are always so quick to hate on Americans. Yes there are bad Americans...but every country has them. Even your country. But I'm not going to go there since I happen to like most people from the UK that I've encountered...it would be unfair to label your entire nation as arrogant, ungrateful, and judgmental because of your behavior.
Sent from my SGH-T999 using xda app-developers app

leelaa said:
I love it.
Sent from my Nexus 7 using Tapatalk 2
Click to expand...
Click to collapse
original_ganjaman said:
Thread Cleaned​
Lets keep personal opinions about users from different nations to yourself. This is a development forum, not a place to vent personal feelings. Now keep it on topic.​
Click to expand...
Click to collapse
Seriously how is the "I love it" on topic or not a personal feeling?
Anyway thanks for the clean up
But still I agree with the OP. Google is becoming arrogant, sloppy and in its quest to be more user friendly making fiends of the ppl that were with them from version 1.

So what is the problem? I am only one person using my nexus and I haven't run into any issues.
Sent from my SPH-D710 using xda premium

sikagoon7 said:
4.2 works fine for me. A few bugs here and there but you can't expect everything to be perfect. Google getting arrogant? Please. Sloppy? I'd say they are spread a bit thin with all the projects they have going on.
Google is run by humans. Android developers are humans. Humans make errors. Not too complicated.
Click to expand...
Click to collapse
well its not about the bugs, bugs can be forgiven.
System works fine...
Its about their behavior
For me personally that I can't mount my USB stick, or lost tablet mode means that I downgraded to 4.1.2 back.

Today is Thursday. The sun will still shine Friday
Humm ..
Its called growing pains. Sometimes you have to take a STEP Back to move two bigger steps foreword. I see so much talk about this is not there that is buggy. Yes we get it.. But what i am seeing mostly is app compatibility Being Broke.. This is something that will be fixed Quickly by most Developers.
Android is and always will be "A WORK IN PROGRESS". My opinion only but if you want bland and safe sell your nexus 7 to me for .50 cents and get a ipad mini.
People who are having issues Please go to the developers web site and let them know your app is not working properly .Give them exact details. You can do the same to google at groups.google.com. Just be Patient
Now my GRIPE The multi user cluster (word here im not typing) as others said was not well though through by google. My guess is they made a date promise and pushed out only part of the Feature.. Typical Google.
It will get better and it will happen quite soon.. Lets just hope...
Take a deep breath relax and say to yourself.. Its only a tablet its only a tablet its only a toy tablet... ..
Thanks for Reading... :fingers-crossed:

I suppose YMMV, but I love 4.2. Smoother than 4.1, and nice features. The only thing that really seems half-assed is the multiuser support.

What is your problem with multi-user? For me and my daughter it is working great - could not be better.
I did add my account to her user ID Play store so she could see the apps we own and install the link.
Performance is good - all our preferences and accounts are separated - and I really can't think of any other features I would want.

I did add my account to her user ID Play store so she could see the apps we own and install the link.
Click to expand...
Click to collapse
I haven't played with multi-user yet, can you add the account just for the play store and not have someone access the gmail account associated with it?
That's my gripe, I want to be able to for ex, have my nephew play with my tablet and all the games etc, but don't want him to access to my gmail etc. I thought this was perfect for that but then read about the app issue. Also, I assume there is no type of limited user, in that a secondary account can still uninstall apps, but at least they can't delete files from the other users home dir.

Yes - my account is just added to my daughter's play store. Open play store and look at add account option.
Works perfectly to give her access to the apps we share.
NO shared Gmail.
Forgot something important:
When you add a second account to play store, you are given a bunch of items you can synch, like contacts.
Uncheck them all!
Sent from my Nexus 7 using xda app-developers app

i had a valid post in this thread, it seems to have been removed ........yet you left the dude saying "love it".
cheers for that :confused
and im sorry but why has this guy just been thanked by 10 people? the post has nothing to do with anything...... shenanigans shenanigans i tells ya!!:silly:

Stick mount wasn't a feature of 4.1. It was hacked in which is why you had to be rooted and use an app. You'll get USB support again. Multiuser support screwed with the storage. That's all.
New tweaks are a little rough around the edges but will be smoothed out soon enough. Give it time, damn guys. I personally think its no better or worse then 4.1.2. We just have a few new toys now.
Sent from my Nexus 7 using XDA Premium HD app

4.2 = 1st time I've truly experienced "butter"...
Sure, I kinda miss the bells & whistles I had on Codename Android, and I'll definitely check out any forthcoming 4.2 updates, but scrosler's stock, rooted, deodexed ROM is far & away the smoothest, quickest ROM I've used on any Android device. Stock kernel, no tweaks, plain vanilla is for me for now. Way better Google experience. OK, I sideloaded the AOSP browser for Flash, but that's it. Chrome is much more responsive on 4.2 than 4.1.2 - Everything is noticeably quicker - I even detect better wireless response. Your results may vary, but I'm not going back!

[/COLOR]If you are unhappy just roll back to 4.1.2. This isn't iOS. You can downgrade all you want.[/QUOTE]
Please tell me how, not rooted?
Sent from my Nexus 7 using Tapatalk 2
---------- Post added at 03:22 AM ---------- Previous post was at 03:19 AM ----------
Am I the only one that has multiple apps that crash and all kinds of problems? Hell even the Youtube app crashes, i am so pissed i want a refund on this tablet they ruined or i want 4.1.2 back grrrrrrrrrr
Sent from my Nexus 7 using Tapatalk 2

If you are unhappy just roll back to 4.1.2. This isn't iOS. You can downgrade all you want.
Please tell me how, not rooted?
Click to expand...
Click to collapse
Wouldn't a factory image flashing work?

PAGOT said:
Wouldn't a factory image flashing work?
Click to expand...
Click to collapse
Yes
Sent from my GT-I9300 using xda app-developers app

erica_renee said:
HMy guess is they made a date promise and pushed out only part of the Feature.. Typical Google.
It will get better and it will happen quite soon.. Lets just hope...
Click to expand...
Click to collapse
Well, I do belive that you are right. I also feared (and expected, to tell the truth) that something EXACTLY like this would happen. I tried NOT to update the system, but why the hell did they keep forcing it when we obvoiusly do not want it? And probably, they must have known that it will broke a lot of things...
Just to explain: for me, there was a message with three buttons: upgrade, more info (which leads to seme text and bigger "upgrade" button and "later", but that "later" means only "ask at next screen unlock" which made the tablet realy hard to use. So, what choice have I had?

i freakin HATE 4.2

Since updating to 4.2, my screen brightness keeps going up and down from moment to moment, things generally run a bit slower, the lock screen is buggy and Quickoffice can no longer save changes to files. Not exactly a forward step.

Same here buddy, lockscreen takes a long time to respond
Sent from my MB526 using xda premium

I hate it when folks feel the need to start their own topic when there are 100 similar ones that would do.
Sent from my Nexus 7 using xda app-developers app

Are you sure you turned off automatic brightness?

Google released a bad update, I don't know why people yell at others for being upset. We didn't see threads like this at all for 4.11 or 4.12. Its obvious that Google obviously needs to work on this as people don't post threads like this for no reason.
Sent from my Nexus 7 using xda premium

blackhand1001 said:
Google released a bad update, I don't know why people yell at others for being upset. We didn't see threads like this at all for 4.11 or 4.12. Its obvious that Google obviously needs to work on this as people don't post threads like this for no reason.
Sent from my Nexus 7 using xda premium
Click to expand...
Click to collapse
If it was really a bad update, why doesn't it affect everyone? I have a stock locked tablet, and simply flashed Google's factory image.. No issue whatsoever!
Sent from my Nexus 7 using Tapatalk 2

I have almost only good experiences with the 4.2, generally feel more stable and haven't noticed any sluggish behaviour. Only problem Im having is with bluetooth, it won't remember profile selections for my paired devices. So everytime I connect to my phone for internet access I need to go and tick internet access under profiles

Sent from my Galaxy Nexus

The majority of people come here for solid technical advice, and some of this discussion hardly inspires confidence. We also need confidence in Google as we have invested in their product and it is perfectly legitimate to raise concerns about the 4.2 update that they pushed to our devices
If you use Bluetooth, for example to tether, then you will have been thrown by the changes to the interface. It was not obvious how to connect, and is actually quite inconsistent in that clicking the device name disconnects which is different to what's needed to connect.
One of the advantages the Nexus has over the Mini is the 16:10 screen great for widescreen movies. It's no surprise then that loss of USB mount (a feature available when many of us decided to buy the Nexus) has hit us hard. Yes there is a paid App which might allow movie streaming but I use the USB to extend storage for the huge game files we must download and so this is a major loss.

PromaneX said:
has a legitimate complaint - the update is terrible and people have every right to be upset about it.
Click to expand...
Click to collapse
l suppose google Should be the first stop, I'm sure they will be happy with the feedback.
Sent from my GT-N7105 using xda premium

I cant believe its not butter :/
On a serious note. I am yet to face any problems with 4.2. I like it alot. Battery life is great, keyboard is great and quick settings i love.
Just like 4.1.2 but with extras
Sent from my Nexus 7 using Tapatalk 2

stevensdrs said:
Since updating to 4.2, my screen brightness keeps going up and down from moment to moment, things generally run a bit slower, the lock screen is buggy and Quickoffice can no longer save changes to files. Not exactly a forward step.
Click to expand...
Click to collapse
Screen brightness is an isolated issue I suspect not caused directly by Android, as most people don't see it.
Everything runs just as fast as 4.1.
Quick Office has a coding problem, not Android.
Stop.
I have only seen 1 real bug in 4.2 and that's the missing December bug.

GldRush98 said:
Screen brightness is an isolated issue I suspect not caused directly by Android, as most people don't see it.
Everything runs just as fast as 4.1.
Quick Office has a coding problem, not Android.
Stop.
I have only seen 1 real bug in 4.2 and that's the missing December bug.
Click to expand...
Click to collapse
It is most certainly NOT as fast for me, just because it is ok on your device please don't assume everyone else's is the same!

I actually love 4.2. A little lag here and there, but I owned a Huawei Ascend with like a 500 mHz processor, a Samsung Sidekick 4G with a 1 gHz processor, and a Kindle fire. Seriously Google isn't perfect (but they are damn close) they released an update you don't like, does that mean you should cry and hit the new thread button? No, it means you should just flash 4.1.2 and save server space. Especially when there are 100 other topics exactly as useless as yours. We don't need more of them.

blackhand1001 said:
Google released a bad update, I don't know why people yell at others for being upset. We didn't see threads like this at all for 4.11 or 4.12. Its obvious that Google obviously needs to work on this as people don't post threads like this for no reason.
Sent from my Nexus 7 using xda premium
Click to expand...
Click to collapse
Clearly you and other folk unhappy with 4.2 should IMMEDIATELY upgrade to Windows Mojave. It will solve all your concerns. Pinky swear!!!

stevensdrs said:
Since updating to 4.2, my screen brightness keeps going up and down from moment to moment
Click to expand...
Click to collapse
Disable Nvidia PRISM. http://forum.xda-developers.com/showthread.php?t=1815414

android1234567 said:
Disable Nvidia PRISM. http://forum.xda-developers.com/showthread.php?t=1815414
Click to expand...
Click to collapse
Has nothing to do with Prism, the heuristics on the backlight seems to allow it to ramp up and down faster than it did before. In fact before the N7 seemed to be very stubborn to change levels, now it's a little too fast perhaps.

No matter what version or ROM I'm using I don't use automatic brightness. I use the lowest setting and adjust when I need to.
Sent from my Nexus 7 using xda premium

Hating it and loving it ? - wow these are strong words for an OS. Just like W8 people just can't work out whether its the cool thing to be for it or against it yet even though there's no need to take sides or feel possessive about it - we're all here just users equally dependant upon the working of Google aren't we?
One sure thing though - bugs will iron out but things like the way Bluetooth works now and the loss of USB mount are major hits for those of use dependant on those features for the last 4 months.

USB mounting was never part of 4.1... why are people suggesting it was? You needed root and stickmount or a custom ROM.
Stickmount will update eventually. Stop blaming Google for breaking something they never supported in the first place.
Sent from my Galaxy Nexus using Tapatalk 2

[APK] Reduce lag with the Seeder entropy generator

THIS IS NOT MY WORK, PLEASE THANK THE OP
lambgx02 said:
Hey everyone,
So, I was experiencing significant lag as we all do from time to time, and decided I was going to get to the bottom of it.
After tracing and debugging for hours, I discovered the source of 90% of Android's lag. In a word, entropy (or lack thereof).
Google's JVM, like Sun's, reads from /dev/random. For all random data. Yes, the /dev/random that uses a very limited entropy pool.
Random data is used for all kinds of stuff.. UUID generation, session keys, SSL.. when we run out of entropy, the process blocks. That manifests itself as lag. The process cannot continue until the kernel generates more high quality random data.
So, I cross-compiled rngd, and used it to feed /dev/urandom into /dev/random at 1 second intervals.
Result? I have never used an Android device this fast. :good:
It is literally five times faster in many cases. Chrome, maps, and other heavy applications load in about 1/2 a second, and map tiles populate as fast as I can scroll. Task switching is instantaneous. You know how sometimes when you hit the home button, it takes 5-10 seconds for the home screen to repopulate? Yeah. Blocking on read of /dev/random. Problem solved. But don't take my word for it .. give it a shot!
Update!
I've built a very simple Android app that bundles the binary, and starts/stops the service (on boot if selected). I'll be adding more instrumentation, but for now, give it a shot! This APK does not modify /system in any way, so should be perfectly safe.
This is my first userspace Android app, so bear with me!
Note that this APK is actually compatible with all Android versions, and all (armel) devices. It's not at all specific to the Captivate Glide.
Caveats
There is a (theoretical) security risk, in that seeding /dev/random with /dev/urandom decreases the quality of the random data. In practice, the odds of this being cryptographically exploited are far lower than the odds of someone attacking the OS itself (a much simpler challenge).
This may adversely affect battery life, since it wakes every second. It does not hold a wakelock, so it shouldn't have a big impact, but let me know if you think it's causing problems. I can add a blocking read to the code so that it only executes while the screen is on. On the other hand, many of us attribute lag to lacking CPU power. Since this hack eliminates almost all lag, there is less of a need to overclock, potentially reducing battery consumption.
If you try it, let me know how it goes.
ROM builders - feel free to integrate this into your ROMs (either the .apk / application, or just the rngd binary called from init.d)!
If anyone's interested, I've launched a paid app on the Play store for non-xda users. As I add features I'll post the new versions here as a thanks to you guys (and xda community at large for being such a great resource). But if anyone's interested in the market's auto-update feature, just thought I'd mention it.
Cheers! :highfive:
Click to expand...
Click to collapse
Just wanted to share this with anyone who hasn't found it through the portal or general thread popularity yet, the original thread can be found here.
As you can see, this .apk (it's easiest to download it from the original thread which has a QR code) claims to increase speed and fluidity in any ROM on any device. Having installed the .apk and set it up correctly, I don't see any significant difference whatsoever. The phone feels marginally faster but I'm almost certain this is just a placebo in my case. HOWEVER, I am very clearly in the minority here as there have been 499 posts in that thread almost all of which are praising the OP, so you should definitely try this out. There are no downsides to it and it doesn't even involve flashing. Just download and install an .apk and turn the thing on and all should work.
Please post any results with as much information as possible here too, it may be down to NexusHD2 JB

Nigeldg said:
THIS IS NOT MY WORK, PLEASE THANK THE OP
Just wanted to share this with anyone who hasn't found it through the portal or general thread popularity yet, the original thread can be found here.
As you can see, this .apk (it's easiest to download it from the original thread which has a QR code) claims to increase speed and fluidity in any ROM on any device. Having installed the .apk and set it up correctly, I don't see any significant difference whatsoever. The phone feels marginally faster but I'm almost certain this is just a placebo in my case. HOWEVER, I am very clearly in the minority here as there have been 499 posts in that thread almost all of which are praising the OP, so you should definitely try this out. There are no downsides to it and it doesn't even involve flashing. Just download and install an .apk and turn the thing on and all should work.
Please post any results with as much information as possible here too, it may be down to NexusHD2 JB
Click to expand...
Click to collapse
just installed it and like you see no difference yet,,so will wait a couple days
and see if anything changes

Cheers for the feedback, having now used it for slightly longer I still see no change. The thing is, there are so many positive reports that I don't think this is just a placebo, but it unfortunately doesn't work on our device.
Sent from my NexusHD2 using xda app-developers app

It's complete placebo.

just installed apk on my Xperia mt15, i think there is improvment ..,., will post after more use..,
Sent from my LT26i using xda app-developers app

Latest xda portal post:
"Entropy Seed Generator Not All It’s Hacked Up to Be"
Little or no performance improvement but real side effect.

Nigeldg said:
Cheers for the feedback, having now used it for slightly longer I still see no change. The thing is, there are so many positive reports that I don't think this is just a placebo, but it unfortunately doesn't work on our device.
Sent from my NexusHD2 using xda app-developers app
Click to expand...
Click to collapse
yea its garbage no difference at all been messing with my phone all day and
still have lags
it may work on other phones but it does not work on our HD2s
uninstalled it

JB Lag Can Be Eliminated!

Wow. I didn't believe it at first, but it's for real.
I heard about an app that someone on XDA released that helps generate random numbers for /dev/random. The theory was that the phone was blocking all over the place while trying to generate random numbers for various processes. This would slow things down considerably.
The app creates random numbers and feeds them to /dev/random every second so the applications don't have to block. It's unreal how much difference this made instantly.
Here's the thread with the explanation and download!
http://forum.xda-developers.com/showthread.php?t=1987032
Hope it works for all y'all too!

Wow it really works...
Sent from my HTC Raider X710e using xda app-developers app

I just did a whack of reading on this topic... There's a huge fire fight going on at google code as to whether or not this actually works the way it says it does... Many say yes, many say no. Either way, it sure does cut down the lag. Personally, I don't care how it works as long as it's not eating battery to do it.
I've had my phone on the charger all day. If I can still get my 24 hours on battery with this app, I'll be a happy man. I will also try integrating it into CM10 so you we can have a flashable add-on for CM10 based ROMS, with no need to have the app installed.
Edit:
In case anyone wants to read all the fighting about this app: https://code.google.com/p/android/issues/detail?id=42265