Android :: Starting Activity From Service / Receiver?
Oct 27, 2009
I have a service that sometimes starts applications.The problem is: if the *previous app* (any app) was recently exited via the home key, then the following message appears in the log:ActivityManager: Activity start request from 10024 stopped.And there's then around a 5 second delay before the target app (any) is launched.If the previous app was exited with the back key, there's no problem.If the previous app exited more than a few second ago, no problem.The same also occurs with a broadcast receiver (which also requires the NEW_TASK intent flag to launch an activity).I don't know if the delay was there in 1.5, but I'm assuming not since I can't find the error message in the 1.5 source code.
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May 28, 2010
I am trying to launch the Main Activity from a broadcast receiver. Can anyone guide me as to how I can do it? I always get "Process is Bad" message.
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Sep 30, 2010
I got a graphical problem regarding the Translucent theme at Samsung Galaxy i9000.It works well in the emulator with android version ranging from 1.6 to 2.2 as well as on SE x10 mini.I have yet to test on more devices.I am starting an activity from a broadcast receiver. The activity started got the theme @android:style/Theme.Translucent If all the activities in my application are destroyed when the broadcast occurs, then the new activity got a working translucent theme and is presented on top of the activity currently in front. However, if the user left the application with the HOME-key, not destroying the activity, I get a graphical bug when the broadcast triggers. The application gets brought to the front with the activity the user last visited showing instead of the new activity that I started from my broadcast receiver. When I press the back key I can see my Translucent activity quickly showing itself and then getting destroyed.This flow results in the graphical bug: Start application. Activity A will be shown. Leave application by pressing HOME-key. Home screen is shown. Trigger broadcast. Start activity B.
Application gets brought to foreground and activity A is shown. Press BACK-key. Activity B quickly shows itself and disappears. Now activity A is shown.Also, after activity B is started and when activity A is shown in its place. Pressing the screen will triggers buttons that belong in activity B even if the user can't see them. If I remove the theme, then activity B will show itself when it's supposed to.Is there anyone else who have encountered a similar problem? Is there any good workarounds I can apply? (I don't want to rebind home to finish all activities) Is the problem my fault or can there possibly be some glitch in Touchwiz?
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Mar 17, 2010
I have a single Activity application, within it I have a service which creates an AlarmManager and sends a broadcast to a broadcast Receiver.If the activity which starts the services dies, (ie. divide by zero), the broadcast receiver stops the old service which created the AlarmManager.It works the first time. The second time, it does not.It seems like the AlarmManager is still active but the broadcast receiver is no longer receiving. It works great once!
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Jul 24, 2010
I am starting an activity from one by passing some data in the intent. I want the next activity to call some asynchronous service (rest service) with the data from intent and show the result on screen.
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May 3, 2010
I have a widget that is supposed to start and stop a service (start it when it's not running, stop it when it is). This is working fine, however, each time the service is started, my app's main activity is also launched, which I don't want from the app's manifest, it works as I want it to (without launching the main-activity, just the service), but then I obviously don't have a main activity anymore.This is how I start the service (I would assume this is the normal way, and I can't see any reference to what might cause the MAIN intent to fire).
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Dec 4, 2009
Need an example of how to create/start a new activity from the main activity. I have a button click event on the main layout. Originally I just used setContentView(R.layout.secondactivity); which brings up the layout but I don't think that is correct since the secondactivity class is not instantiated at this point yet. I have looked for such an example and can not find one.
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Apr 25, 2010
I have a map app which works fine when its stand alone but it causes an unexpected error when I try to add it as part of another app. My current app which extends Activity tries to launch the map activity with the following lines of code Intent m = new Intent(this, HomeSetter.class); startActivity(m); I also have the xml setup correctly <activity android:name=".HomeSetter" android:label="Screen 4"> </activity> <uses-library android:name="com.google.android.maps" /> </application> However when I try to launch it crashes everytime. I've tried searching the net but I've had no joy in finding a solution You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscribe @googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
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Oct 2, 2009
startActivity() displays the new Activity on top of the current one. But how to display it underneath instead? BTW, I'm starting an Activity from another application, if that makes a difference.
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Dec 15, 2009
I need to be able to handle/catch Intents while my Activity is closed. So I am looking at either a Service or a BroadcastReceiver. Is it possible to "receive" intents to a service itself? I tried to search, but could not find anything helpful. With a BroadcastReceiver, I am not exactly sure how that works outside of an Activity. Does it depend on the Activity being open/running? Can it run by itself?
Let's say that my Activity is killed by Android(or a task killer app), does the BroadcastReceiver still receive intents and process them? I have used a BroadcastReceiver as a widget, but I do not want to use a widget this time. My goal is to have the user open the Activity to set some options. From there, they would be able to close the Activity, but I would still be able to process Intents that were sent out by the system. I am still fairly new to Android development, so I could be so far away from where I need to be.
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Jun 23, 2010
I am starting to develop a new app and I am a bit confused about the structure I need to give it.I need to react to broadcast intents, so I placed a broadcast received in the manifest. Every single intent produces an action to be performed. Now the first question: should I start a service (maybe with non_sticky option?) or should I start a thread (or an async task) directly from the broadcast receiver? If I start a service, should I do all the stuff in its body, or should it start a thread. I should do the heavy job in a thread if there are time consuming operations, but what if the gui of my application is just an activity with the options and a button to start the service. What is the point in keeping the main thread busy? Do I risk to be killed for not being responsive? I read here and there that I can update the gui from a background thread. Can I do that even if it is started from a service? The AsyncTask's onProgressUpdate is said to run in the application main thread, but if the application is made of different activities, who tells me which activity is the user looking at while the thread is doing all its long work? The user could change activity in the meanwhile and then the update would be unuseful.I know it's (quite) a lot of questions, but I need to get some clarifications before taking the wrong path.
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Jan 20, 2010
I'm hoping to do some audio processing in a remote service (service I've spawned onto its own thread); this will basically occur in a while (1) loop so constant processing. Occasionally I want to provide some information back to the activity that is bound to the service; I'm doing this by sending a broadcast from the service, that is received by a broadcast receiver on the activity, which then uses the activity's service connection to call into the service and get the information needed; at this point the broadcast receiver makes an alert dialog presenting the information to the user.If I stay in my while(1) loop after raising the broadcast, the action in the broadcast receiver never seems to occur.This is confusing to me since the activity and service are in separate threads.If I end the loop after raising the broadcast, the desired behavior on the activity side occurs, but of course this isn't acceptable since I need to be doing constant processing.
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Aug 17, 2010
I have a widget which starts a service. The service registers two broadcast receivers. I would like to send back intents from the receivers to the service, so that the service can react.I remember reading (on some blog) that this won't start a new service, but will simply pass the intent to the already running service. Is this correct? Is it a bad way of doing it? Is there a better way?
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Aug 18, 2010
I have a Receiver for BOOT_COMPLETED intent and it will start a Service by calling startService with an intent and the Service processes that intent in onStartCommand function by spawning a thread that does a HTTP post to a server.On powerup, sometimes it takes 3 to 5 seconds to get the active data connection on phone, when this happens Service fails to do HTTP post as there is no data connection. Is it possible for the Receiver to send the intent to Service using startService with a delay.? so that when onStartCommand of Service is called data connection is ready to post data.
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Jun 9, 2010
When I was originally learning about Android a few months ago I swear I read something about a way to immediately launch an activity when starting a task. I am curious about this now because I need to display an intro screen on launch but I don't want the intro screen to be the root activity. Does anyone know if there is something like this and if not what is the best way to handle an intro screen?I tried googling for a few hours to find it but can't for the life of me.
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Jul 27, 2009
i have a little frontend showing a list of items that it will retrieve from a service. I want that service to be started in a separate thread.so the UI is still responding to user interaction while waiting for that service to call a callback method. What is the best way to start the service in a detached thread?
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Nov 10, 2010
I've read comment that the AlarmManager in a earlier API version couldn't start services. Prior to which API Level was that?
I'am currently testing in the emulator with API Level 4 and it start a service just fine.
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Jul 2, 2010
I have a call blocking application. It has 3 files:
1) class BlockMyCall extends BroadcastReceiver
2) class SimpleClass1 extends Service
3) PhoneBlock extends Activity
I start "PhoneBlock " Activity to call Service "SimpleClass1 ", which eventually calls "BlockMyCall" intended to block outbound calls (by setting result to "null").
I want to know if I can run the class1 from service without starting activity. If so , how?
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Sep 16, 2009
The app widget documentation indicates that the "widget provider"being a receiver of a broadcast service may not exist (the process) beyond the completion of the call.If I want to maintain state between two broadcast events, such as say widgetProvider.onUpdate(), can I start a local service and leave it hanging there until my widgets are disabled? If I didn't explicitly stop that service will it be loaded again and resumed when the device wakes up.
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Jul 31, 2010
I have two projects in Eclipse: service and UI client.
In onCreate in UI client I have:startService(new Intent(this, ExampleService.class));
But this fragment: ExampleService.class throws NoClassDefFoundError exception at runtime. I have installed ExampleService.apk, and ExampleUiClient.apk. Project compiles, and everything looks fine. What I am doing wrong?
Is it possible to start service from other apk?
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Feb 12, 2010
A WAP PUSH (Broadcast)receiver basically doesn't need any UI. It is a silence application which handles the Push messages based on actions/ mimetype without needing any intreaction with user, I've tried to test it in a SMS receiver by removing the Activity from the project and it stopped receiving the SMS messages. My question: Does all android applications "MUST" define a activity? Is there a way to hide it?
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Feb 2, 2009
I am trying to launch an activity from another activity .. Within the com.android.SingleLauncher..
I have activity launch code as ..
CODE:...........
I have set the android:multiprocess="true" in the AndroidManifest.xml of TargetSL I don't seem to see the multiple instances of TargetSL, which i am expecting ..
All i see is 2 process, where i was hoping to see an instance of TargetSL, for each launch that was invoked by the singleLauncher!
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Oct 28, 2010
I have a Service which tracks the location of the user. Currently, the Service boots when the application starts and stops when the application terminates. Unfortunately, if users keep the application in the background, the Service never stops and drains battery.
I would like the Service to stop when my application is not in the foreground. I was hoping the Application class would let me Override onPause and onResume handlers, but it does not have them.
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Jul 9, 2010
I have a broadcast class that blocks the incoming call. I want to call that broadcast receiver from the activity ? Can any one help me fix this. I appreciate your help. 1. Class A extends activity will call Class B that extends BroadcastReceiver, now I want to block calls , only based on certain requirements, which are checked in Class A, if true then call the Class B (or block the call in short)
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Nov 18, 2010
This is vinod i have been saving problem while i am starting Activity in receiver so i would know this is the way or not for start activity in receiver
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Jun 29, 2010
I have a layout with two buttons, I want to disable or make unclikable one of the buttons when internet connection is lost and back to clickable when connection is regained. From my broadcast receiver I am calling another class(which extends activity and thus can call findViewById) which is attempting to change the main layout. App is force closing. What am I doing wrong here, any other ideas as to how to achieve what I am trying to do.
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Jun 26, 2010
I have an activity, it needs to response to a broadcast event.Since an activity can not be a broadcast receiver at the same time,I made a broadcast receiver.My question is: how can I notify the activity from the broadcast receiver?I believe this is a common situation, so is there a design pattern for this?
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Mar 25, 2010
I am writing an application to listen the SMS inbox in android with one activity and one BroadcastReceiver. Once the SMS comes the Receiver is showing alert message. But I want to send the message information from Receiver to Activity. I don't know how to achieve this.
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May 7, 2010
I have four activity in a Tab and after the user clicked on the list I would like to start another one activity, but I can't use startActivity(Intent), because then I lost the TabHost view, and I get an activity witch is reserving the full screen:( So the user won't be able to click on the other tabs. What should I use? BroadCastReciver or What? If anyone have any good idea please help on me.
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Mar 25, 2010
I have the code to get the list of packages installed in phone. I have represented the list in the form of Array List, below is the code snippet. But upon clicking in the package name I want to start that application, but how do I get the respective class name and package name to run? Is there any other method which I can try to start an application? arrayList<String> PackageNames = null; List<PackageInfo> lis = pm.getInstalled Packages(GET_MINIMAL); Pkgs = (ListView) findViewById(R.id.package_list); for (Package Info pi : lis)packages.put(pi.packageName, pi); PackageNames = new ArrayList<String> packages.keySet()); Collections.sort(PackageNames); PackageNames.add(0, "All"); pgs.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple _list_ item_1, PackageNames)); Pkgs.setOnItemClickListener(new OnItemClickListener() { public void onItemClick(AdapterView<?> arg0, View v, int pos,long rowId) { Intent i = new Intent(); i.setComponent(new ComponentName(class name,packagename)); startActivity(i); I have tried intent to start the activity, but don't know the class name and package name to pass in the ComponentName() to start activity.
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