Developing an e-reader and need help with settings - Android Q&A, Help & Troubleshooting

Hello Everyone! I am developing an 13.3 inch e-reader and my settings menu is very basic. I only have WIFI date and time, display, language and input, reset to default, and about.
I am missing critical functionality such as Accounts & sync Settings and Security and all of the normal options a stock Android phone or tablet has. I am wondering if there are APK files out there that i can simply use ADB to manually install these missing items to system/apps/ on my device. Do i have to edit the Android manifest for these to load correctly?
My specific version of Android is 4.0.4
any help would be great.

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[Q] What files make TTS working on android: i.e. How to fix broken tts?

Hi everybody,
I have a new tablet based on Allwinner A10 cpu (the device is called mediacom 932i but it is probably a clone of a chinese product); the stock rom provided by the manufacturer (in img format not zip) is based on android 4.0.4. The rom is working quite well apart from the fact that there is no way to access to text to speech settings. in standard settings panel it misses the configuration option for text to speech settings and if you install a new tts engines such as Ivona, when you press access tts configuration from the program itself its says that settings application crashed.
I would like to try to fix this issue. On my nexus s I have a perfectly working cyanogen based on android 4.0.4 and I was wonderi g if I can trasplant (copy) some files / libraries to make tts work also on this tablet.
More in general can someone explain me what are the files, library, apks required to make tts work?
Thanks a lot & regards,
Davide (aka blackdir)

[Q] Solution Required

Dear All,
Please find our Requirement and suggest what would be the best solution.
We need this solution for Andorid Based Device.
1. Replace Home Screen with Custom Screen
2. Only show specific installed applications
3. Specify URL in case of redirection or open google/Create White list of Accepted URLs
4. Enable/Disable Native Device Hardware
4.1.****** Android Market (App Store)
4.2.****** Camera
4.3.****** WiFi
4.4.****** Bluetooth
4.5.****** Microphone
4.6.****** Access Point
Looking forward your suggestions.
Thanks,
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[Q] Android ROM customization roadmap, general question

Hi guys, with my team we are working on an android device. At the moment we have accomplished the following steps:
Develop the PCB and touch screen to work with Android
Download 4.4.4 AOSP and customized the kernel for our device
saved source into GitHub and have a custom ROM with bootloader
So far so good, right now we have android running on our custom hardware (MIPS CPU) and we are quite satisfied with the overall performances.
Now we are starting the second phase of the project, and this is where we got stuck. We need to completely wipe out the UX and interaction of android 4.4.4 and create our own one.
This is what we need to accomplish:
Create a custom boot animation
Create a cutom animation for the battery charge
remove status bar (Time, Battery level) and pre-installed .apk
Create our own Android OS interaction with our .apks
Regarding the first steps, that's easy. We plugged into bootloader folder and started to change the animations for Battery and Logo. Regarding the rest the only solution we came up with is to have a sort of kiosk application that substitute the standard home screen.
Is there any other way to substitute the home screen with our own .apk? We have a built-in plug-in app so actually our .apk can pick up other .apk from file explorer and execute them. The problem is that we don't want to show to the user the underground system, so we don't want to show to the user anything except our home screen or kiosk mode app. Because the device will be used by commercial projects and retail stores.
What would be the best approach? Just remove all pre-installed .apk from the ROM (like calculator, browser, contacts) and execute an .apk in kiosk mode or create a new bootloader? Where we can find more documentation about this topic?

Create global content filter for files

Hey guys!
I´m new here and I hope you can help me with some questions... I didn´t know if I´m right here, so please correct me if I do something wrong
My "setup":
- Samsung S3 international with CM13
I like to create a global "Content Filter", which filters files (pictures, videos, documents, etc.) on my smartphone. So what I mean is something like what the UserManager (sorry I can´t poste the Link to Android API) from Android framework does:
User A (owner) creates pictures with the camera, download files, etc. and if User B (guest) logs in, User B can´t access the files from User A and vice versa.
The diffrent part is that I like to "hide" or better make them not accessable by custom criteria - for example "only pictures from the last two hours will be shown to User B". And the main point ist that every application gets the same content.
I thought I have to edit and extend the internal/external storage functions (or ContentProvider?) by my custom filter. Later there will be a system app for controlling the behavior of this filter.
Now there are some question, which I ask myself:
- Is it possible to implement this functionality in Android specific code and not in device specific code? So is it possible to make it portable for other devices and Android versions (Custom ROM, manufacture ROM or the pure Stock Android from Google´s Nexus phones) without "much" effort?
- Does it make more sense to use the original Stock Android instead of Cyanogenmod to reach the portability?
- Where do I have to start? I downloaded the source Code of CM13 for the Samsung S3. But how I ask before - is there a generic way for all devices and android versions? I started to look into the framework specific code of android (system/frameworks/base/... ). I thougth I can build the filter between the api calls (java -> jni bridge -> c/c++), but that would be not the right place, yes?
I hope someone understand my plan and can help me with some informations and tipps or where I have to look to get them!
Thanks!!
Fabian
I think you might mean the profile system that android used to have on ICS?.
Unfortunately I can't answer why they removed that feature. Does the phone not have an option or something if you have 2 or more google accounts registered to the device?..
Beamed in by telepathy.

i have qualcomm firmware backup of tablet used in firealarm systems need to modify

Tablet 7 inch used in fire alarm system run with android 5.1.1 and Qualcomm cpu
when it connected to power it it start and running with special user interface
i don't have developer option or root access and not like normal android device
That User Interface used in Fire Alarm and no option can be helpful
now i could found Test point and now I have full firmware backup
i need some one can help me in modify that software even i can purchase for his help
- i need remove Owner user interface and built rom for mine
- i need some one how can modify Apk files
- any one have any small or big experience plz contact me thx

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