Android : Need Activity Manager Information

Feb 16, 2009

I have been practicing with android for a while and read a few books but there is something I can not find anywhere even on the net. I am interesting in the activity manager and how it works. Especially how the activities are pushed on the stack then pulled, etc... I looked everywhere I could for such documents but the only things I could find were overall documents with not much details. I have downloaded the entire source code (cupcake branch) and started to have a look at it but obviously the code is big and very complicated. I was just wondering if an android google engineer somewhere or even somebody else who could let me know where I could find such information (whether it is a document, a link, etc...).

Android : Need Activity manager information


Android : Closing Activity Completely / Process Killed By Activity Manager Service

Aug 2, 2010

Whenever the memory needs to be reclaimed, the process is being killed by Activity Manager Service in killPidsForProcess. I have a back button in my activity window on right corner of the title bar.

I want to kill the activity completely on clicking the close button. Can I reuse the same function and will it have any major effect? Please help me out in this.

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Android :: Update Information In Activity From Background Service?

Mar 18, 2010

I am trying to create a simple Android application that has a ActivityList of information, when the application starts, I plan to start a Service that will be constantly calculating the data (it will be changing) and I want the ActivityList to be in sync with the data that the service is calculating for the life of the app. How can I set up my Activity to be listening to the Service? Is this the best way to approach this problem? For example, if you imagine a list of stock prices - the data would be being changed regularly and need to be in sync with the (in my case) Service that is calculating/fetching the data constantly.

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Android :: Passing Information Back From EventListener To Activity

Nov 6, 2010

I'm new to Android, and event driven code in general. Rather than embed loads of anonymous event listener classes in my Activity to handle onClick events etc, I defined separate classes to keep the code clean. Then I use them e.g. like this

myButton.setOnClickListener(new MyEventListener());

So, when 'myButton' gets clicked, MyEventListener's onClick method does some stuff.

I wanted to know the best practice for

a) accessing things in my Activity from the event listener. For example to change the text of a label. The onClick event takes a View in, but this is the view for the button that's been clicked, so if the label is NOT a child of my button, I can't use findViewById to get a handle to it. I've modified the constructor to pass in a reference to the label, so that the event has a handle to it but not sure if this is the most elegant way of doing it.

b) Passing information back e.g. when my event fires, I might want to disable some EditText fields. I'm thinking the proper way to do this is probably to dispatch another event from my event listener, that the Activity listens for, and when it sees the event, disables the fields in question. Is that the way to do it in Android?

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Android :: Get Information Of Activity Lifecycle Callbacks In Views Drawn?

Aug 3, 2010

I want to get the size of a view that is in my activity but I am not able to get that information in any of the activity lifecycle callbacks (onCreate, onStart, onResume). I'm assuming this is because the views have not been drawn yet. At what point are views drawn and is there a callback I can put my code so I can get the size of the view?

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Android :: SingleInstance Of The Activity And Relay Information Back To Parent?

May 8, 2009

I basically have three activities X, Y, Z and I want only one instance of each but I want control over the navigation and I can't do that by putting all three activities in one task because of the stack structure.

Here is a scenario, from X I launch Y given a certain "id" which correspondence to specific data in the DB, Y inflates and populates it's views, then I go back to X and launch Y again with a different "id" in the intent, I don't want the overhead of launching the activity and inflating the views again, anyone know how to do this?

I tried using singleInstance, but the problem is that I can't send the result code back to an activity in a different task.

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Android :: Displaying Real Time Information During The Execution Of An Activity

Apr 6, 2009

I want to display the status of the activity execution on the screen using the TextView while activity is executing. I am appending the String messages at different stages of execution in the TextView, which is defined in the Layout main.xml (e.g. TextView.append("Server started..").

For e.g. I am running socket communication application in which my android application is the server and it is receiving the messages from the local desktop. So in this application I want to show "Server started.." message when socket server on android started , then a messge "waiting for message.." and then "message receivied.." when message received by android server.All 3 steps are the part of a single activity.

But in my case, I am getting all 3 messages at a time after activity execution completed. Is there any API available, using which I can show the status during the execution also.

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How To Refresh Activity With New Information

Jun 17, 2012

I have several textviews in an activity. I then have a button that I want to be able to click that will update the textview.

I want to do this without having to create multiple activities.

How do I go about I guess refreshing the current screen with new information?

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Android :: Return To Previous Activity Without Calling Finish() / Save This Information?

Oct 26, 2009

I have an android application with a LOT of activities, think of something like a book where every page is a new activity. The user can make changes in each activity, for example highlight certain texts with different colored markers etc. and it's crucial that I'll remember this information as long as the application stays alive (and I don't want/need to remember any of this when it's not). As I understand the best mechanism for storing this kind of information is via onSaveInstanceState(Bundle outState) and onCreate(Bundle)/onRestoreInstanceState(Bundle) rather than lets say, the Preferences mechanism. My only problem is that the user can navigate backwards to previous pages (Activities) and the only way i know of achieving this is by calling finish() which of course kills the current activity without calling onSaveInstanceState(Bundle outState) and even if it did call it, the next time I would launch an activity representing that page it would be an entirely new instance. So my question is: Is there a way to go back to the previous activity without calling finish()? or, is there a better way to save this information? maybe through static variables?

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Android :: Activity Manager Vs Socket

Apr 7, 2010

I'm trying to catch socket errors (invalid ip, wrong port, etc.).It seems like the ActivityManager is shutting me down before I have time to catch these errors. I really have no idea what's going on here. My splash screen Haus attempts to start the service from a thread, however when the thread get's to the "about to create socket", it simply locks up. It locks up the entire app until the Force Close dialog box arrives.
I have Log.i all the way into the class that makes the connection.04-07 22:15:29.286: INFO/CONNECTION(19053): 4368 04-07 22:15:29.296: INFO/CONNECTION(19053): establishConnection() 04-07 22:15:29.446: INFO/CONNNECTION(19053): about to create socket 04-07 22:15:34.036: INFO/ActivityManager(76): Displayed activity com.scs.haus/.Haus: 8545 ms (total 8545 ms) 04-07 22:15:38.989: WARN/ActivityManager(76): Launch timeout has expired, giving up wake lock! I never see any of these Logs, except of course for the one that tells me I'm inside the method.

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Android :: Eclipse Can't Connect Activity Manager - HelloWorld Not Appear

Jun 24, 2010

This appears related to:http://stackoverflow.com/questions/3037512/android-application-doesnt-start-from-eclipse/3106897#3106897 Even with the Android 2.2 platform is this still the accepted way to operate the emulator? i.e. 1, 2, 3 start/kill processes as described in the above post? I am having a similar problem on WinXP with Eclipse w/ ADT plugin. Why would the activity not be able to start on the emulator? The computer has 756MB RAM if that could be the problem. The deployment is going along until Eclipse tries to deploy the activity. The emulator starts with the text "ANDROID_" and then eventually just displays the ANDROID logo, though appears to still be running just fine. Any ideas? Thanks. The code was copied from the HelloWorld tutorial. Here is the Eclipse console log including the error messages towards the end:
[2010-06-23 15:43:26 - myHelloWorldProject]
[2010-06-23 15:43:26 - myHelloWorldProject] Android Launch!
[2010-06-23 15:43:26 - myHelloWorldProject] adb is running normally.
[2010-06-23 15:43:27 - myHelloWorldProject] Performing net.concentricllc.HelloWorld.HelloAndroid activity launch
[2010-06-23 15:43:27 - myHelloWorldProject] Automatic Target Mode: using existing emulator 'emulator-5554' running compatible AVD 'myHelloWorldAVD'
[2010-06-23 15:43:27 - myHelloWorldProject] WARNING: Application does not specify an API level requirement!
[2010-06-23 15:43:27 - myHelloWorldProject] Device API version is 8 (Android 2.2)
[2010-06-23 15:43:27 - myHelloWorldProject] Uploading myHelloWorldProject.apk onto device 'emulator-5554'
[2010-06-23 15:43:32 - myHelloWorldProject] Installing myHelloWorldProject.apk...
[2010-06-23 15:48:29 - myHelloWorldProject] Success!
[2010-06-23 15:48:37 - myHelloWorldProject] Starting activity net.concentricllc.HelloWorld.HelloAndroid on device
[2010-06-23 15:51:35 - myHelloWorldProject] Device not ready. Waiting 3 seconds before next attempt.
[2010-06-23 15:51:36 - myHelloWorldProject] ActivityManager: android.util.AndroidException: Can't connect to activity manager; is the system running?
[2010-06-23 15:51:38 - myHelloWorldProject] Starting activity net.concentricllc.HelloWorld.HelloAndroid on device
[2010-06-23 15:53:36 - myHelloWorldProject] Device not ready. Waiting 3 seconds before next attempt.
[2010-06-23 15:53:36 - myHelloWorldProject] ActivityManager: android.util.AndroidException: Can't connect to activity manager; is the system running?
[2010-06-23 15:53:39 - myHelloWorldProject] Starting activity net.concentricllc.HelloWorld.HelloAndroid on device
[2010-06-23 15:55:41 - myHelloWorldProject] Device not ready. Waiting 3 seconds before next attempt.
[2010-06-23 15:55:41 - myHelloWorldProject] ActivityManager: android.util.AndroidException: Can't connect to activity manager; is the system running?
[2010-06-23 15:55:44 - myHelloWorldProject] Starting activity net.concentricllc.HelloWorld.HelloAndroid on device
[2010-06-23 15:57:15 - myHelloWorldProject] Device not ready. Waiting 3 seconds before next attempt.
[2010-06-23 15:57:15 - myHelloWorldProject] ActivityManager: android.util.AndroidException: Can't connect to activity manager; is the system running?
[2010-06-23 15:57:18 - myHelloWorldProject] Starting activity net.concentricllc.HelloWorld.HelloAndroid on device
[2010-06-23 15:58:51 - myHelloWorldProject] ActivityManager: Error type 2
[2010-06-23 15:58:52 - myHelloWorldProject] ActivityManager: android.util.AndroidException: Can't connect to activity manager; is the system running?

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Android :: Get Result From Search Manager To Main Activity

Nov 18, 2010

Activity A is main activity. Whereas Activity B is SearcActivity (Search Manager). Activity B is List Activity, so whatever result comes, result is displayed in the list. Once user clicks on the list, I want to get that list selected item to be returned to ActivityA.What I did. Code...

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Android :: Communicate With A Location Manager Started From Another Activity

Aug 20, 2010

In my app I want to obtain a gps lock and record the coords. But I do not want to lock the device into looking for the gps. The user is to be free to traverse through the app and the different activities within.

So If I call a locationListener in activity A, can I reference it in activities B C and D?

if is was still in activity A I could say something like

A.this.mlocListener.removeMyUpdates();

When I am in activity B how can I reference the LocationListener I set up in Activity A

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Android :: Sync Information And Future Information

Jul 7, 2010

I am a Mac user (photographer/ videographer). I also rely heavily on my iPod Touch when mobile (i can often find a wifi signal when i am out and about). I use iCal on the Touch and iCal on my Mac as well as the address book on both everyday and as a Mobile Me user, my two devices sync so everything is mirrored and up to date. I also HATE AT&T for their terrible signal strength and coverage and have been a loyal Verizon customer for many years and this is why I don't have an iPhone. Okay, all that being said, is there an easy way to still use everything I love and rely on with my Mac (the calender and address book, mainly) and easily sync all of my existing information and future info to an Android based device? How easy is it to use an Android device with a Mac? I don't want to have to manually re-enter my entire address book into a new device.

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Android :: SMS Sender Information

May 8, 2010

Is it possible to have the sender's name/number displayed on the lock screen when a text is received? I've got handcent installed and I've got it set up so that when I receive a text, the quick reply box pops up for 10/20 seconds. But if I'm away from my phone and I later check to see if I've received a text, the only indication I have is a small icon on the navigation bar.

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Android :: Getting Certain Information Off From Web Page?

Aug 12, 2009

For an example, lets say I have a url which returns stats about a certain football team (the team name is a parameter on the url) and it displays the information purely as text (with maybe a bit of text before and after):
Stadium: MyStadium Capacity: 100,000 Shirt Colour: Red

Is anyone able to give me any advice on how I would go about retrieving only the information I need so i can put it into my own format and display it nicer? Would I need an xml parser, would I need the page source code, if so how could I get it?

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Android : Seeking Information To Get SDK - JDK

Aug 23, 2010

I am very new to androids n want to know more abt t. pls give me informations abt SDK ,JDK,, eclipse etc n why they r used? how do i install n use tat pls posts links to videos.

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Android : Access Web Information?

Dec 22, 2009

I'm attempting to create an app that will display usage information for customers of Roger's Wireless(Canada). I was wondering if someone could point me in the right direction on how to:

1) input Username and Password info directly a web textbox to sign the Customer in, from an EditText View.

2) grab usage information in the form of text or images to display to the user within the app.

Just a pointer in the right direction on what method(s) would do this for me.

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Android : Can Get Music Information?

Jul 12, 2009

Is there are api that can get the music information, such as album name,author name,song name or time of this song?

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Android : Want To Get Information From Webview

May 5, 2010

I want to get the edittext value from webview(i.e My webview contains the edittext for username), Can anybody help me how to retrive them.... after clicking on some button of webview.

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Android : How To Get Version Information

Jan 10, 2010

How to I get the version name from the Manifest, I tried the following but I get a Null Pointer Exception. code...

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Android :: Command To Find OS Information

Jul 23, 2010

I have to store what version of android users are using, search all over internet, hard to find this info.

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Android :: How To Get Wifi Connection Information

Sep 6, 2010

I am writing an application which checks the security protocol of the phone's wifi connection. Between the phone and AP, they may use 'wpa', 'wpa2', 'wep' or unprotected 'open' connections. how to get such information?

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Android :: Direction Information In MapView

Aug 16, 2010

I want to show the direction information in my app.Direction from one address to the another using Google maps and also wanted to set overlays at the starting address and the destination address.Is there any classes in android too do that.

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Android :: Want Information About Features Of Gingerbread

Aug 28, 2010

I found that android 3.0 is gingerbread, what are the new features in gingerbread and when it is going to be launched. And also i need information about the official release date of Honeycomb.

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Android :: Get Latitude And Longitude Information

Sep 13, 2010

If I click the button I will show current lattitude and longitude value in textbox..

I dont know how to achieve this..! i am using htc hero emulator..!

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Android :: More Information About Firefox For Mobile

Nov 21, 2009

Spent my morning researching and pulling the latest facts about Mobile Firefox. Turns out, it IS coming to Android (thanks to the release of Android NDK) but only after the WinMo and Maemo versions.It will support tabs, sync, HTML5, CSS, JS, SVG, Flash, geolocation, and a bunch of other really neat stuff.Here's the post: Meet Firefox For Mobile [Video + Feature Highlights + More Info]

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Android :: How To Protect Private Information From Others?

Jun 23, 2010

I've integrated lots of private information like accounting, messaging, emails, tasks and so on, into desktop widgets and everywhere around the phone. Every so often, someone wants to take a look at the phone and play around. Reading some important stuff is one thing, but people tend to mess the stuff around as well. Have you found a program or a way to protect from that? (other than denying to the people :> ) I guess some kind of shell program that you turn over when someone wants to demo the phone would be a nice solution.

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Android :: Way To Keep Account Information After App Uninstall?

Mar 10, 2010

I've an issue related to the application uninstall. Actually when my application is removed, all the related accounts are removed, and consequently all the account contacts disappear from the device. I was wondering if there is a way to keep the accounts information or eventually to be notified when the application is being uninstalled, in order to allow the application to advice the user.

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Android :: Technical Information On Honeycomb?

Sep 28, 2010

I'm trying to find some technical details about Honeycomb, but I've found nothing so far other than very vague suggestions that it will be optimized for tablets.

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