Android :: Can I Start Activity Without Creating A New One?

Jul 31, 2010

In a broadcast receiver I want to do the following:
1. See if MyActivity is alive somewhere. 2. If it is, bring it to the foreground. 3. Otherwise, start a new MyActivity.

Android :: Can i Start activity without creating a new one?


Android :: Start An Activity And Return Back To Original Activity

Jan 26, 2009

I have an application with contains multiple activities. The main activity will start the others ( use startActivity() ) depends on user event, when an activity close, it calls finish() and return back to main activity. It appears to behavior like that.

However, the "problem" I see is main activity's onCreate function is called every time. I think the the main activity should be placed in the activity stack and simply push to front when others exit, therefore only onResume, onStart are called. Is there some flag I need to set or I misunderstand the activity behaviro?

In child activity, besides calling finish() or startActivity for main activity, what is other way to move main activity to front?

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Android :: Start Activity When Main Activity Is Running In Background

Jan 10, 2010

I created an application which enables the user to set whether he wants to receive notification while the application runs in background mode. If the notifications are enabled an activity should be started (the dialog should appear on the screen).

I tried to enabled it the following way:

CODE:...........

This is the method from main activity. When onPause() is executed isRunningInBackground is set true.
When I tried to debug it when the main application was running in the background the line

startActivity(intent) had no effect (the activity didn't appear).

Does anyone know how to midify the logic in order to start an activity from the main activity when the main activity is running in the background (after onPause() is called)?

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Android :: Start An Activity In Different Apk Using StartActivity - Using The Activity Name Or Similar

Apr 20, 2010

I have tried to write an Android application with an activity that should be launched from a different application. It is not a content provider, just an app with a gui that should not be listed among the installed applications. I have tried the code examples here and it seems to be quite easy to launch existing providers and so on, but I fail to figure out how to just write a "hidden" app and launch it from a different one.

The basic use case is:

App A is a normal apk launchable from the application list.

App B is a different apk with known package and activity names, but is is not visible or launchable from the application list.

App A launches app B using the package and class names (or perhaps a URI constructed from these?).

I fail in the third step. Is it possible to do this?

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Android :: Activity Check Service To Start Another Activity

Sep 10, 2010

I need to made an activity (without layout) that on start check if a service is running. if it is true it starts Activity2, if it false it starts Activity1.

I tried with this code:

CODE:............

Enter code here

But when I check, in the onCreate method, if serviceConnect!=null I receive sometime a NullPointerExcption.

I tried also to insert the operation in the method onCreate in an Async Task:

CODE:............

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Android :: Start Activity And Clear Activity History

Apr 22, 2010

I have a huge maze of activities in my application. What I need to do, is that when the user logs in into the system, the activity history should be cleared. I cant just use finish() when I start a new activity, because I want the activities to have a history until the user logs in. I have experimentet with the different flags when starting an activity, but I have had no success.

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Android :: Start A New Activity From Anther Activity

Nov 19, 2010

I want to start a new activity from ab activity that (extends from Linearlayout) .. but this code is not right

CODE:..........

public class SearchResultForm extends LinearLayout{ ...

And i get this error ..

No enclosing instance of the type SearchResultForm is accessible in scope.

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Android :: Start An Activity From Non Activity Class

Aug 19, 2009

An activity can be called from existing activity through *startActivity(intent); *

Is t possible to call an activity from non Activity class ? and how?

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Android :: SetContentView Fails / When Creating New Activity

Jan 19, 2010

My code is calling setContentView(R.layout.someLayoutID); from an activities' onCreate method. The activity is launched with the following: Code...

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Android :: Can't Get Layout Info / When Creating Activity

Jul 22, 2010

I have this element in my layout XML:
<FrameLayout android:id="@+id/FrameLayout01"
android:layout_width="320sp" android:layout_height="380sp"
android:layout_gravity="center" android:background="#99CC33">
</FrameLayout>
And I want to get its position on the screen with getTop(), getBottom() but I want to do it only once.
I was trying to do it on the onCreate(), but those methods return all 0 as response.

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Android :: Creating A Stub Of An Activity In Testing Project

Jul 22, 2010

I want to create a stub of one of my Activities, but I want to keep it in the test project so not to have it in the actual apk. I don't seem to be able to find a way to do it though. I get this:

java.lang.RuntimeException: Unable to resolve activity for: Intent { act=android.intent.action.MAIN flg=0x10000000 cmp=com.example.test.StubActivity }

I did find if I put it in the main project and put it in the manifest accordingly (IntentFilter:(Action:Main, Category:Default)) it will work, well it actually crashed, but I am not bothered by that. Something to fix later on.I did think about putting everything in the same main project and just have a test package, but that would then involve messing the manifest, I think. It seems better to keep them separate. It's just cleaner.

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Android :: Start A Map Activity From Other Activity

Apr 8, 2010

I am developing an aplication. This one is designed to login a user, then select how find a place, using simple data or using a map. When I try to set in the event OnClick for select the "Map way" (using intent):

startActivity(new Intent(getApplicationContext(), MapviewController.class));

I have problems and didn't work.

My class and manifest are:

CODE:...........

Do you know any way to call the MapActivity from other?

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Android :: Extracting Activity Code And Creating Graph View Class

Mar 1, 2010

I had a bunch of code in an activity that displays a running graph of some external data. As the activity code was getting kind of cluttered, I decided to extract this code and create a GraphView class:

public class GraphView extends LinearLayout {
public GraphView(Context context, AttributeSet attrs) {
super(context, attrs);
LayoutInflater inflater = (LayoutInflater)
context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
inflater.inflate(R.layout.graph_view, this, true);
}
public void start() {
// Perform initialization (bindings, timers, etc) here
}
public void stop() {
// Unbind, destroy timers, } }

Moving stuff into this new LinearLayout-derived class was simple. But there was some lifecycle management code associated with creating and destroying timers and event listeners used by this graph (I didn't want this thing polling in the background if the activity was paused, for example). Coming from a MS Windows background, I kind of expected to find overridable onCreate() and onDestroy() methods or something similar, but I haven't found anything of the sort in LinearLayout (or any of its inherited members). Having to leave all of this initialization code in the Activity, and then having to pass it into the view seemed like it defeated the original purpose of encapsulating all of this code into a reusable view. I ended up adding two additional public methods to my view: start() and stop(). I make these calls from the activity's onResume() and onPause() methods respectively. This seems to work, but it feels like I'm using duct tape here. Does anyone know how this is typically done?

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Android :: Independent Thread That Executes While Creating Layout And Defining Activity?

Jun 3, 2010

The android docs say that it adds the runnable to the queue and it runs in the UI thread. What does this mean? So, for example, the same thread I use to create my layout is used to run the Runnable? What if I want it as an independent thread that executes while I am creating my layout and defining my activity?

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Android :: Start New Activity In TAB

Jan 5, 2010

I am working on a travelling application and i am using tabs and each tab has an activity i.e world clock in one tab ,weather data in another tab and so on with in the weather tab i am displaying the users selected cities and the scenario is that when the user selects a city that city's forecast is to be displayed and later to view details as well which is in another activity . how can i launch this new activity from the already started activity with in the same tab ?

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Android :: Why Won't Activity Start

Sep 13, 2010

I'm trying to start an Activity with startActivityForResult, but I keep getting an ActivityNotFound exception, and I can't work out why. I've looked through the code multiple times, and it seems to be identical to some other, working code. Any suggestions?

The newNoteButton that starts the Activity:

CODE:...........

And the beginning of the TypyEdit Activity:

CODE:................

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Android :: How To Start An Activity

Sep 15, 2010

I have created two classes: Example1 and Example2, which extends activity.

Example1 contains a UI of buttons, while Example2 contains UI of TextEdit.

I want to call Example2 when a button is clicked, so this code is in an onclick method

Intent i = new Intent();
i.setClassName("com.a.ui", "com.a.ui.Example2");
startActivity(i);

So I am able to get the UI of Example2 successfully.

What's an alternate way of calling intent?

Is there any alternate way to start an activity?

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Android :: Can Start New Activity That's Not Specified

Jun 25, 2010

I'm trying to do some dynamic code and I load a new class that's supposed to be an Activity and I want to start it, but using the regular startActivity(Intent) wants the Activity to be "Declared" in the AndroidManifest.xml file.

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Android :: PopupWindow On Activity Start

Feb 21, 2010

I am trying to make a PopupWindow show straight away when an activity has started.

when calling public void showAtLocation (View parent, int gravity, int x, int y)

I get the exception ERROR/AndroidRuntime(2500): Caused by: android.view.WindowManager $BadTokenException: Unable to add window -- token null is not valid; is your activity running?

At the moment I am calling from onCreate, but when calling from onStart or onResume it still gives the same error.

The activity api says the activity is supposed to be running after onResume is called. Where is the best place to load up the PopupWindow if it needs to be done straight away?

At the moment It looks like Activity.onWindowFocusChanged() is the best place.

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Android :: Start Activity Without Manifest

Jan 22, 2009

I create my Network provider and I want to start Activity from it. Is it necessary to create separate Activity with Manifest and then launch it using startActivity? Can I launch unregistered Activity directly from my provider?

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Android :: Start Activity From The Service

Sep 3, 2010

I have a launcher activity which gets activated everytime i start the application and a service which complements it. Now as i press the return key from my main activity .Its Ondestroy gets called.Now i have nullify the pointer of the my launcher activity there. now i am listening through the service any event happening on the network after closing the launcher activity thread and if any event occurs i have to relaunch my launcher activity. i have tried intent but doesnot seems to get though it .

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Android :: Start Another Application From Activity

Feb 21, 2010

I want to know if there is any way to start another application from within my application. Specifically i am trying to a have a shortcut (button) to Google Maps Application within my application. Also is there any way to start another process from within my android appplication?

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Android :: Start Other Activity By Code

Jun 2, 2009

I want to start the activity owned by other application. I know we could construct the Intent(setAction,setClass), and then call context.startActivity(intent) to start a new activity owned by the same application. When we start the activity not owned by the same application,doest this also work?

For example, I have a activity (com.test.StartTest) and there is a button that used to start some activity Settings owned by the Phone:

CODE:..............

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Android :: Start An Activity From A Service

Oct 6, 2010

I have a service (input method) and from within that service I want to start and activity which was declared in the same manifest. The activity maybe running but in the background.

How do i check its presence and bring it to front, or optionally start this.

From what I can gather from other posts, this is about what I need to do:

CODE:..............

I don't knwo which of thest flags pertain to what I need to do. The docs are quite merky, and my random attempt at making this work failed.

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Android :: Can Start My Own Activity For New Notification

Aug 4, 2009

How can i start my own activity when a new notification arrives to our status bar if click that notification my activity should play...

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Android :: Start Service Without Using Any Activity

Oct 16, 2009

My application has a background process which continuously waits on a socket for receiving messages and it should be started only once and at the time of application starting.Thus i want to do that background job in a service.

The service should not be started from the activity ,it should be started at the application starting.

How can i define the service,which will be started at the time of application starting?

If at all the service is started from activity.The activity can be destroyed and restarted.when this happens the service also be restarted .

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Android :: Start An Activity In Another Package

Jan 25, 2009

My application has 2 packages because one is shared with my other applications. I want to start an activity of the shared package.

I tried the following: Intent intent = new Intent(); intent.setClassName(shardedPackageName,sharedActivityName); startActivity(intent);

It throws an ActivityNotFoundException and suggests that the activity might not be in the manifest. But how do I list an acitivity from another package in the manifest?

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Android :: How To Start Service From Activity?

Jun 14, 2010

How can I start a service from an Activity ?

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Android :: Start Service From Activity

Feb 25, 2010

In my app i have an activity from which i want to start an Service.

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Android :: Start Activity From Service

Aug 11, 2010

Is it possible to start an Activity from a Service? If yes, how can we achieve this?

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