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I was looking for an app for phones (iPhone, Android and SmartPhone - any or all) that would simply run in the background and place any scanned upc code digits into the currently active textbox.
I've Googled for quite a while and only found an Android app that actually replaces the keyboard of the phone.
It seems like it should be easy (I have many for PCs) but I haven't done any handheld programming since Windows CE days so I don't know if this is possible (can apps see other apps controls in these phones).
Has anyone ever come across an app like this?
use the iphone sdk from zbar and you can do it inside your app.
You cannot do this system wide. You can only add this functionality to your apps.
This question is very similar Take a look. Android Long Press on Edit Text behavior
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Is there any method or way to check that user is writing text whether in whatsapp, or messaging, or any edit text.
No, not supported by Android. It might be possible if you go on a lower level using NDK, but the short answer is, there is no easy way.
The basis of this answer is how Java works, each application runs in a virtual environment and thus they can not interact with each other directly.
If you really want to achieve this (However there will probably be limited usage, such as only rooted devices) I would suggest to start search the web with keylogger android as keywords.
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Is it possible to enable a driving mode like that found on the Galaxy S phones when the user presses a button?
Or is this not built into all android phones?
You can create such a "mode" using Tasker (found in the Play Store). Basically you set up actions that occur based on certain events (such as a button press). Actions include changing brightness/volume settings, triggering apps etc...
For example, I created a button that sets me "Available"/"Unavailale" for phone calls - it doesn't just turn the ringer off, it shoots the callers right to VM...
It takes a bit of work (and isn't free), but Tasker is pretty powerful & you can typically find help online fairly easily.
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I had to accept a return on an Android app because the user told me it was not working on his Motorola Xoom. (The audio playback had some reverberation)
This is not a super high volume app, so I am not planning to go out and buy dozens of Androids to test it!
Also, it is an audio recorder app, so it does not work too well in an emulator.
How can I diagnose and correct the problem on the Xoom and in fact all other platforms, without investing a small fortune!
One thing you can do, if you're not averse to rooting, is installing different ROMs on your device. This will at least give you the chance to test on some different versions of Android and different UI skins (how many are available depends on your device).
I also read about services that test your app on different devices for you, but I'm not sure how much these cost.
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Can I get an app that only can do one thing : dial a specific number?
If it is affirmative, can one make an app that creates and edits plurality of described applications?
When you run it the first time , it will ask for list of names with phone numbers, and then creates a bunch of icons: Mike, Steve etc. Each icon dials one person
Where can I hire a programmer, who is capable of doing this?
Yes. it is possible
You could create an application that makes configurable widgets, so a 1x1 widget that has a preference stored for the number to call.
If you're looking to hire someone then I can't see much point in going into detail as how this would achieved seeing as you'll be paying someone to come here and read this answer.
You could try hiring via a freelance website such as gun.io or any other site that comes up when you search for find freelance android developer
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I am looking at locking down several Android Tablets (Samsung Galaxy tab) to allow the user to unlock the device and be sent straight into one application and not allowed to leave. I was wondering if this is possible without creating a custom ROM and if so how? Any help is greatly appreciated
You might try creating a custom launcher and see how far that gets you. I don't think it will be bulletproof but by adding some hacks like having it auto-launch a specific app, it's probably about as far as you can get without a custom ROM. See here for the code of the stock Android launcher:
https://android.googlesource.com/platform/packages/apps/Launcher/+/master/src/com/android/launcher/Launcher.java
You could create an app that is more or less "non-exitable" by overriding the hardware buttons' default behaviour in your application.
Although if your app crashes and doesn't automatically restart after a crash, the user has full access to the rest of the system.