Android :: Application That Has To Capture The Key Events Both In Foreground And In Background

Jul 26, 2010

I am developing an application that has to capture the key events both in foreground and in background. I used the following code. But am unable to capture the keys in background.


I used broadcast reciever..


Android :: application that has to capture the key events both in foreground and in background

Android :: Capture Key Events While In Background

Dec 2, 2009

I am planning to port an application from Symbian to Android and I'm looking at the possibilities of the Android platform.

My application runs in background and needs to detect when the user presses and holds a button (for 3-4 seconds) on the phone even when the phones key lock is on.

I am in the process of learning Android programming but so far what I understand is that if my application runs as a service it would be able to receive broadcast such as ACTION_MEDIA_BUTTON. Am I looking in the right direction?

I had a quick look at the list of native android broadcast actions and I could only find broadcast actions for Camera, Media and Call buttons. What about the other buttons?

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Android :: Capture The Events For An Application?

May 19, 2010

I want to capture the events like user clicked on so and so button, or > entered some text in Edit Box and etc...

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Android :: Determining Current Foreground Application From Background Task Or Service

Jan 30, 2010

I wish to have one application that runs in the background, which knows when any of the built-in applications (messaging, contacts, etc) is running. So my questions are: How I should run my application in the background. How my background application can know what the application currently running in the foreground is.

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Android :: Way To Generate Key Events On Foreground App?

Jun 30, 2010

I am new android developer. I am writing an application to receive data from barcode scanner. I am able to receive data from barcode scanner via bluetooth connection. If user open notepad or other application, I want to display the data to the application, so I want to generate key events on foreground application. I am trying to find a way but I can't find. Anyone please tell me how to do?

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Android : Send Touch Events To Foreground Activity

Jul 21, 2010

I'm trying to figure out a way to send touch events to the foreground activity. Essentially I want to write something that allows me to run it from the shell and just say "I touched this co-ordinate", so that I can automate some UI tasks for testing. Essentially what Monkey does, but application agnostic.

I think that android.view.MotionEvent holds the key, but I'm not sure how to run something without view so that I don't interfere with what is on the screen. Perhaps with a service, but I'm unclear how that would work.

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Android : Difference Between A Background And Foreground Service?

Aug 21, 2010

I am currently writing my first Android application and I keep running into references to background and foreground services. Since I intend on using a service in my application I was hoping to get a clarification between the two and how they are used.

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Android : Webview Foreground And Background Colors?

Sep 11, 2009

I cant find anywhere how to change the Text COLOR in a webview. I can change the background color but not the Text.

Any Ideas? I want my webview to be white text on a black background instead of black text on a white background.

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Android :: Launch Intent In Background Then Bring To Foreground?

Jul 19, 2010

Is there any way to launch an activity w/ Intents (in this case the Browser) in the background, and then bring it to the foreground using a service or activity?

I know it's possible to bring apps to the foreground by launching an intent with FLAG_ACTIVITY_BROUGHT_TO_FRONT

But is it possible to initially launch the activity in the background?

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Android : Bring An Activity To Foreground From Background Manually?

Oct 19, 2009

In my application i wait on socket for network events.On some events i have to bring activity into foreground(make activity as running) if at all it is not in the foreground.

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Android :: How To Capture Key Events With Window-less Activity?

Dec 2, 2009

I have an Activity which has no window (but it has a view). I'm using: getWindowManager().addView(view, params);I've attempted to call takeKeyEvents(true), however I see that takeKeyEvents first retrieves the Window and then calls takeKeyEvents on that Window.In my case, the Window is null.What this means is that I never receive onKeyUp and onKeyDown calls, which I need in order to intercept some key presses from external input devices (similar to a handsfree set for example).

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Android : Way To Capture Soft Keyboard Key Events?

Oct 28, 2009

I am facing a problem any one can help me regarding this. I have an EditText and a list of contacts. I want to search a contacts on matching with characters entered in EditText field.

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Android : Way To Capture Soft Keyboard's Key Events?

Jul 2, 2009

I am popping an alert box whenever an user exceeds 100 characters in a text-box(EditTextPreference). Now i am able to capture the hard keyboard's, i.e. computers's keyboard, events, but i am not able to capture the sofkeyboard's key events. There are some keys like numbers, enter, delete etc. in the softkeyboard which i am able to capture using onKey, but i am not able to capture the alphabets and other keys. i also tried setOnKeyboardActionListener, but didnt get the desired results,( may be i was not using it correctly). Can any one suggest how to capture the click of alphabets on the sofkeyboard.

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Android :: Method To Detect Widget Is Visible - Foreground Or Background?

Aug 6, 2009

It would appear on a G1 (with the latest software update) that onUpdate () runs even when the widget is not visible. Is there a way of sensing that the widget is or is not visible or is otherwise in foreground? That is, running the code below shows a logcat message at whatever interval the Widget is scheduled to update, whether it's in foreground or not, whether even the screen is dim or otherwise in deep sleep. It would seem onUpdate should only be scheduled to run when the Widget is in the foreground or visible. Is this a defect in the G1, or is there some other API call to detect if the Widget is visible?

public class HomeScreenWidget extends AppWidgetProvider { ...

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Android : Way To Change Foreground / Background Color Of Title Text?

Feb 9, 2009

I have a subclass of and because I am using a light theme, the dialog title comes out as Black on a dark background which is hardly readable. This leads me to the question: how do I change the Dialog title background or foreground colors? Can I do this via a theme? Which property will it map to?

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Android :: Draw Background Image With Moving Foreground Graphics?

Aug 28, 2010

I would like to know what the best way would be to draw a background image (this would be pretty much static) and a foreground object which would move depending on user input in Android?

Sort of like a side-scroller game (when the foregroudn object needs to animate and change a lot more than the background).

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Android :: How To Capture Key Events From Intent's / Broadcast Receivers?

Oct 29, 2010

Is there a way to capture a key event from the Menu button using an Intent or Broadcast Receiver? Basically I want my app's Service to be activated when the Menu key is pressed.

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Android : Capture - Suppress Home And EndCall Buttons Events?

Jan 4, 2010

If you ever tried to write a locker app on Android sure you meet this problem: Code...

Seems like onKeyDown is filtering out all keys but "Back" and "Menu". Well, it's not true! Home button will still bring you Home screen and End Call button will run native Locker application!

Fellow's out there also claim it as a problem: How to listen from ENDCALL button problem With Home Back screen button Suppressing Key presses in Activity, especially in Options Menu
Issue 4202: Feature Suggestion: permission for intercepting KEYCODE_CALL

Do you know any workaround to block two those buttons? Is the only way (as often) - write in C ?

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General :: Capture Stylus Hover Events Before Get To Apps

May 13, 2014

I'm trying to work with a custom build of Android based on KitKat to incorporate a stylus, copying some of the functionality (though not code) from Samsung which sells Android-with-stylus builds for e.g. the Note 3. I'm not including details of the specific device because right now I am working on a custom dev device and my aim is to write code which is generic enough to be usable from any Android (based on KitKat). The build (written by others) already incorporates drivers and sends stylus events correctly as motion events etc. Programming at the app level I can receive onHover, ontouch, onClick etc

The specific functionality I am trying to achieve is to pick up a stylus-button-click while hovering. It's perfectly possible to do this in any app, using an onGenericMotion Listener.

However, I want to make my "stylus-action" have system-wide effect - so that anywhere (in any other app, or in the launcher or whatever) I will pick up the event (prior to any other app) and bring up my custom menu. (just like AirCommand in Samsung Note 3) I guess in my custom Android this would then make that particular action somewhat protected or unusable for other users, but I'm ok with that.

In older Android (prior to ICS) you could try something by putting up a System Overlay (i.e in regular app code, without hacking the ROM at all), but this is no longer possible.

This is not an attempt to tapjack or whatever, I understand why this functionality has been removed from the domain of the regular programmer, and I don't want to regress my ROM back to pre-ICS behaviour by allowing the System Overlay hack. Now I am programming the system (if my change is good enough I'd like to submit it back to AOSP) so I would like to know the best method to address this. Since Samsung have already done this, it must be legal (using legal in the terms of "Android will allow it"), and I want to do it right.

Is it possible to write something similar to the System Overlay when you are running from a system service? Or is there a good choke-point to capture events before they are broadcast to the current running apps?

I was looking at AndroidXRef /frameworks/base/core/java/android/view/ specifically in the function dispatchHoverEvent() which looks like a promising place. My naive idea is that I would place code here checking the MotionEvent to see if the button is pressed and if it is, don't call any listeners and instead call my little menu app (or broadcast a custom message, or something anyway). However, I've never written code on the ROM level before (LOTS of experience writing app code) so I don't know if this is a really bad point or a good point to add in code. Should I be putting things at a higher level or a lower one? Will this capture all events or not? Is it all just trial and error?

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Android :: Key Capture In Background

Jul 22, 2010

I am working on key capturing events in background. i used Service to send my application back. When the application is in forground i can capture the keys and logged in a file.But when i sent it to background i am not able to get. i am aware of onKey() and onKeyDown(). and also i feel these can only capture the keys when application is foreground.

can anyone please suggest how to capture the keys while application is in background. and also without DDMS how can we capture the screen .Is there any API's

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Android :: Notified When Foreground (top) Activity (application) Changes

Oct 6, 2010

I want to write a service for Android platform that is notified when the current foreground activity changes. Basically the service should do some tasks only when the top activity changes. Is there any way to subscribe and to be notified when this kind of event occurs? Or there is no possibility and the service should poll from time to time the list of running activities and to check what is the foreground activity ?Not preferable solution...

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Android :: Programatically Detect Foreground Application / Screen?

Aug 20, 2009

Is there any way for a backfround task to programmatically detect or recognize by learned id which application or screen (different package) is showing?

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Android :: Droid Background Service Stops Processing Broadcas Events / Solve It?

Nov 6, 2010

I've a problem with my android application.
I'm using a background service (with notification on the status bar) which performs an audio sample every hour. To perform this sample I generate a broadcast event every hour and when I capture the event the audio recording starts. During the day, when I'm using the phone, I've no problems. The strange behavior happens during night, when it seems like if the phone goes to an "idle" state: the broadcast events are no more processed. From the log file I understood that the events are generated and putted in a queue... and when I start using again the phone, all those events are raised in the same moment.
Do u have any idea about how to solve this problem? How can I force the phone to continue processing my events? do I have to set any variable of flag to avoid the phone going in this kind of "idle" state?

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Android :: Application To Capture And Process Whiteboard Data

Nov 4, 2008

One of the winners of the Google app contest was Jigsaw by Mikhail Ksenzov, an app to capture and process whiteboard data. The app isn't in the market, and I can't find anything via Google about it's status. Is it still beta, or what?

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Android :: Application That Blanks Screen During Video Capture

Feb 19, 2010

I overheard someone say there was an app that blanked or put a decoy screen on the screen while taking video, does anyone know what this app is called, if it exists?

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Android :: Phone Application Supports Video Capture?

Oct 12, 2009

How can I determine if the phone my app is running on, supports video capture?

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Android :: Capture Image From Camera Application In Programming?

Aug 20, 2009

I am trying to implement Camera application in android,and i got some code from net to create a Live Camera through WebCam.Upto this no problem.Now i have to capture the images when click the button, and i displayed the captured images in the Dialog window.Without any exception the program is running but the captured image is not displayed,some default image is displayed.

My code is.


I have no idea from where this default image is coming.

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Android :: Capture Droid Application's OnPause Event?

Oct 18, 2010

My android application is consists of 20+ activities. I want to perform some task when application is in background (not an specific activity) and want to perform some other task when application is resumed. How to do this? I couldn't find onPause() and onResume() methods in Application class.

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Android :: How To Capture Preview Image Frames From Camera Application In Programming

Jul 31, 2010

I am writing an app to capture the camera preview frames and convert it to bitmap in Android.

Here is my code:...........

After I start preview, the callback got called with data, but the bitmap is null.

What did I do wrong when convert the byte array to BitMap?

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Android :: Application To Manage Special Events?

Nov 16, 2010

I'm a college student, and there's daily specials at bars, salsa dance nights, special meetings, lectures, etc. And all these things happen around me. I don't want to just put them into my calendar and have them flooding it, but I would like some app to hold such things. Anyone know what I can use that isn't my default so I can retain my personal schedule and, if I want to do extra, can see this app's contents?

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