Android :: Callback To Activity After Layout Has Completed?
Jun 3, 2009
I want to find the dimensions of the various views in my layout. My understanding is this can only be done after layout is completed since layout is somewhat dynamic. So, after the activity calls setContentView() and then returns control on the main thread to the OS so that layout can occur, how do I get a notification that layout has completed so I that I can query the views for their dimensions? On a related topic, can I find out the status bar's height or least the screen's full size (from which the status bar's height can be calculate by subtracting my window's height)?
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Jan 13, 2010
Our application will expose a Service that can be called by Activities in other people's applications.In many cases, the parent applications calling Activity may be paused before our Service completes. I am looking for the best way for a Service to communicate back to the calling Activity that may have been paused.These are the known options:
(1) Require calling Activities to have a registerReceiver() with a custom action and broadcast to that from our Service. The only way to secure this registerReceiver() is with a signature-based permission.As our Service communicates with any number of unknown 3rd party apps,we can't sign our Service's parent app with all these unknown certificates. These apps would therefore be exposing an unsecured registerReceiver() on their Activity. Would ideally like to avoid requiring this.
(2) Create a PendingIntent to send results back to the activity and give it to our Service. Our Service would send data to calling Activity's onActivityResult(). Each time the result is delivered, the calling Activity will go through onPause() and onResume() but this should be OK.
(3) The calling Activities could create a Handler. The Activity would then create a Messenger pointing to that Handler and send it to our service. Our Service can then use the Messenger to deliver our message back to the calling Activity.
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Sep 14, 2009
My activity calls a browser activity where the users submits their info to retrieve a PIN. That PIN is then sent as a parameter to a url specified in the request.
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Aug 18, 2010
I have an activity class(Application Class ) which calls a service class(Service Class) and closes. The service class takes about 5 seconds to complete its task and calls a method which is present in another class(Callback Class). Now according to the result, the callback needs to notify the Application class.Once i get the callback from the service, I tried calling a method defined in the Application class. In this method i create a new intent of Application class and call startActivity(Application Class). But this is not working. Can anyone tell where i am going wrong and what can I do to solve this issue.
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Oct 30, 2010
In my application, there is a service which has a running thread to capture data from remote server, and also this service is triggered by AlarmManager, for example let 1:00 am to start the service. After the service finish the task, it stop itself and the main activity need to update GUI. I don't know how to let the main activity know when the the service stopped, so that the main thread can update GUI.
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Jan 1, 2010
I have integrated the downloader activity (Google provided) into my application.. On the whole a very straight forward process. A problem I have though, is, after the downloader has completed the window disappears and nothing happens. If I hold down the HOME key I see my app and if I click on it my appss window comes up and runs correctly. Also when I run it subsequently it works correctly. Has anyone else experienced this? It certainly looks like the downloader should trigger my app when it is done; I am not sure if the window is just not getting focus or someething. It is a fullscreen GL app.
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Aug 28, 2009
I'm trying to pop up an AlertDialog when someone long presses a list item.What I end up with is nested callback objects.I'm not sure if that is the problem but simple Alert dialog examples are not working for me.
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May 6, 2010
I have an Activity which uses a layout with a LinearLayout in it. Now I want to create in runtime a subactivity which loads some other layout and add this layout as item of my LinearLatout.
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Jul 22, 2010
I'd like to have some emergency cleanup code execute just before my app crashes. I tried using onDestroy(),, onFinal() and finalize() to no avail. Is this possible in an Android Activity?
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Nov 17, 2010
Static Layout for whole app that must be in all Activity
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Oct 5, 2010
My app Consists an intro page with "Start", "About", etc..
I managed to create a functional version of the app by having the "Start" button call a new layout in which a new onclick listener is defined.
This doesn't seem clean to me that I@m defining a new onClick listener for each Layout I use and wonder how the correct way would be to create individual pages (including my "About" and any other screens I implement).
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Sep 14, 2010
Official android dev website says that:You can implement your tab content in one of two ways: use the tabs to swap Views within the same Activity,.....http://developer.android.com/resources/tutorials/views/hello-tabwidget.html
I just wanna use tabs to swap views, no more than one activity. is there any sample code?
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Feb 28, 2010
For a rather crazy reason I am trying to pass a linear Layout from one activity to another. Should I use an intent extra for this? What would be the right way to create a Linear Layout in one activity and then spawn a new activity using that linear Layout.
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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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May 13, 2010
I am having layout which I want to render on to different sizes of mobile (like WVGA854). Resource structure is like
reslayoutmain.xml
reslayout-largemain.xml
By default it is taking layout main.xml file itself of layout. Its not pointing to layout-largemain.xml. its throwing exception:Activity can not start resource not found. So can any one guide me how can I acheive this and how to support mutiple screens with different layouts like large,small and default along with images specified in respective dip folders.
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Aug 18, 2009
I created a new Activity and created a new layout file under res/ layout . after this,i also want to add a options menu file under res/menu.but how could i bind all these layout file with this Activity? I can't find any info in manifest file. or i missed it?
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Apr 29, 2010
How can we use more than one layout file. I have implemented a cutom dialog.That means i have created an layout file for dialog. And one layout file for my activity. But whatever the UI items in dialog layout ile if iam using them by findViewById it is giving me null
I will explain in details here @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); applicationContext=getApplicationContext();
Dialog folder=new Dialog(this); folder.setTitle("Creating folder"); folder.setContentView(R.layout.create_folder); TextView tv=findViewById(R.id.folder_text); //Here folder_text is in my second layoutfile ie in create_folder.xml //In the above statemet i got the null to tv variable. folder.show();
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Feb 4, 2010
It displays the first view correctly but i want it to be connected to a java class so i created an FirstActivity class where i can control all my components in the first view but how do i attach the first.xml layout with the FirstActivity java class ?
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Aug 19, 2010
How can I pass a string from an activity to a layout?
I can pass arrays from an activity to a layout with the following activity code...
Is there a simpler way to just pass a single string instead of any array of strings, from an activity to a layout?
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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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Apr 19, 2009
Is it possible to add a view dynamically that overlaps other views in the layout. I have Linear Layout defined for the activity. As part of the Layout I have a custom View. The content changes dynamically and sizes appropriately based on the content size, with fill_parent for width and wrap_content for height. But what I want is, dynamically take over the full screen and then based on a click go back to the normal mode. Is there a mode to display a view where - in it can overlap all other views in the layout?
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Aug 3, 2010
I'm trying to implement tab buttons bar and a navigation bar in my android application. The problem is, that I would like the navigation elements to persist. When starting a child activity, the nav bar moves.
How can I make these two elements "non-movable"?
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Aug 18, 2010
I have a custom view (an extension of a TextView) that I want to dynamically add to my Layout (don't want to include it in the main.xml file).
The book says to fetch the RelativeLayout using findViewById() in my java code then create a new instance of my custom view, then use addView on the RelativeLayout to add the new view.
I'm not getting any errors, but when I click my button to add the new view, nothing is happening (view isn't being added). Do I need to set additional properties on my custom view (layout width, layout height for example) in order for it to be shown?
Adding code
CODE:............
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Jul 21, 2010
I want to add tabs to the layout of my activity, but I don't want the activity to extend TabActivity. The example in http://developer.android.com/resources/tutorials/views/hello-tabwidget.html only gave example of subclass of TabActivity.
Is there any way I can make it without extending TabActivity?
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Sep 24, 2010
I have created a an activity named Example which have 3 LinearLayouts . I want to start an activity. So I used the following lines of code...
Test is another activity. As a result of the above code a new activity is called in new page. But I want to get the same resule or start the activity inside 2nd layout of Example class.
How to achieve this.
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Jul 9, 2010
I'm trying to create a simple text based game in which I ask a question based on a movie. The list of movie's is in a text file which I've included in res/raw. So basically I want to have a default string, say "Who acted in", followed by the name of the movie. Could I have the first string (along with a submit button etc) in my res/layout/main.xml file, and follow that with the movies name, after I've extracted it from the text file in my activity, or does the layout have to be defined in one place only?
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Feb 26, 2010
I want to do something very similar (in terms of appearance) to the app details activity of the Market app. It looks like a cross between linear layout (not all rows the same), list (scrolling nature), preferences (headings). My guess is its a linear layout in a scroll view (ignoring activity header/footer) and the headings are just hard coded.
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Oct 26, 2010
I have an activity. It does not have a title bar. The content view is just a linear layout. It looks like android draws a drop shadow at the top of my content view, directly below the status bar. Is there a way to stop that from being drawn?
My layout is just:
I have no titlebar:
requestWindowFeature(Window.FEATURE_NO_TITLE);
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Nov 6, 2010
My activity's layout is as shown below.
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical">
<FrameLayout android:id="@+id/title_bar"
android:layout_width="fill_parent"
android:layout_height="25dip"
android:background="@drawable/bg_title" />..............
So, the search box is fixed to the bottom of the screen. But, when user clicks the EditText, Soft Keyboard shows up and pushes the layout out of the screen except the search box. I'm just starting out with Android, so am I doing anything wrong here??
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Jul 15, 2010
New to Android and this is probably a stupid question but I couldn't find an answer after searching the forums.
I have the Evo and cant figure out how to get rid of the completed download indicator arrows at the top of the screen.
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