Android :: AddHeaderView Changes Behavior On ListView / Way To Fix?

Jul 10, 2010

I got two kind of lists on 4 different views. All lists are clickable and starts an activity to read the clicked record. One is just a listview populated from the DB and works fine. The second is also a listview populated from a DB but has a addHeaderView. This makes the list forget where it was when you return from the listview's intent. If I remove the addHeaderView(); it works fine. Why does AddHeaderView changes or even malfunctions ListView's behavior?

Android :: AddHeaderView changes behavior on ListView / Way to fix?


Android :: ListView AddHeaderView Gives ClassCastException When Adding LinearLayout

Jun 18, 2009

I've been trying to add a linear layout to a listview header. The listview appears fine and is working as expected, but when i try to add a linearlayout to the header i get a java.lang.ClassCastException: android.view.ViewGroup$LayoutParams occuring at the list.addHeaderView (ll); line. I thought it might be something in the complex layout i had so i switched it to just a linearlayout with a colored background and still got the same error. The end result i an trying to get is a list with a header that is all scrollable.

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Android :: Getting Right Highlighting Behavior In ListView

Sep 20, 2010

I have a ListView set up in single-choice mode like this:

<ListView android:id="@id/android:list"android:layout_width="fill_parent"
android:layout_height="fill_parent" android:background="#ff444444" android:layout_weight="1"
android:drawSelectorOnTop="false" android:choiceMode="singleChoice" android:scrollbars="vertical"
android:headerDividersEnabled="true"/>

When I press my finger on a choice, the selection changes from white text on light gray to black text on orange. But as soon as I lift my finger, the selection reverts to the original state. I'd like that chosen row to remain in the black-text-on-orange mode when I lift my finger so that the user knows what was selected in the list (my onClickListener has captured the selected row, of course). Is there a way I can tell the ListView that I want this behavior or something similar so the user knows what item has been selected?

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Android :: Reverse ListView Scrolling Behavior?

Sep 16, 2010

I have been trying now for a few hours to reverse the scrolling of behavior of the ListView. Essentially when scrolling down with my finger I want the list to scroll up!

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Android :: ListView Scrolling Behavior And Performance

Feb 4, 2010

I have a listview showing contacts.

When I'm scrolling the list the scroll works pretty smooth however when/if I'm trying to continue the scroll in the middle of the last scrolling the scroll just stops and sometimes the item I clicked on is selected (I have registered an OnClickListener to the item view).

I would like to get smooth scrolling just as in the device native contact list.

My implementation builds each contact a view containing: 1. Big picture for the contact image. 2. Small picture for the type of the contact. 3. TextView with the Contact name 4. TextView with some extra text about that contact.

My current layout for every item looks like:

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

I've tried changing the LinearLayouts to relative ones but saw no improvement in performance.

I've created my own "Selector" in code (to eliminate the time it takes to load the resource) so that odd rows will have different background color. The code looks like:

CODE:........

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Android :: Change Default OnListItemClick Behavior Of ListView

Jun 18, 2010

Is there any way i can make my listactivity (rather listview) highlight the List Item when it is clicked (pressed) upon? (...and remain highlighted) The default behavior, simply highlights the item for a moment, and it gradually fades to black... Currently, the highlighting only happens when we use the DPad... It'd be ideal if atleast one list item is "highlighted" at all times. Worst case scenario, i may have to keep track of the "last clicked item" (by default the first) and change its background or something...but i was hoping there was an easier way...

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Android :: ListView - Index And Position Behavior Upon Restart()

May 19, 2010

I am using a ListView with an ArrayAdapter that holds objects. When I select an item, I am capturing the position and index of the selected item. If I scroll down prior to selection, the position and index represent the location of the item in the list. Selecting that items takes me to another activity. When I use the back button to return to the list, it seems that the ListView gets a new position and index for the visible items.

As a result, I can't figure out how to reference the selected item during the restart() of the ListView Activity. I have tried to capture position and index, but as I've said, they change upon returning to the Activity.

Is my understanding of the ListView "redraw" correct? Does it renumber my items based on what's visible? -When in the life cycle is getView() called? Is there a way to force an update to the ListView so that my captured index still points to the same object?

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Android :: RelativeLayout Fill_parent Unexpected Behavior In A ListView With Varying Row Heights

Apr 29, 2010

I'm currently working on a small update to a project and I'm having an issue with Relative_Layout and fill_parent in a list view. I'm trying to insert a divider between two sections in each row, much like the divider in the call log of the default dialer. I checked out the Android source code to see how they did it, but I encountered a problem when replicating their solution.

To start, here is my row item layout:

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

The issue I'm facing is that each row has a thumbnail of varying height (ImageView01). If I set the RelativeLayout's layout_height property to fill_parent, the divider does not scale vertically to fill the row (it just remains a 1px dot). If I set layout_height to "?android:attr/listPreferredItemHeight", the divider fills the row, but the thumbnails shrink. I've done some debugging in the getView() method of the adapter, and it seems that the divider's height is not being set properly once the row has it's proper height.

Here is a portion of the getView() method:

CODE:.........

The rest of the method simply sets the appropriate text and images for the row.

Also, I create the inflater object in the adapter's constructor with: inflater = LayoutInflater.from(context);

Am I missing something essential? Or does fill_parent just not work with dynamic heights?

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Android :: How To Use Droid AddHeaderView?

Sep 16, 2010

Can Android's addHeaderView() be used to add multiple headers throughout a single ListView? Can someone give an example of how to do this? I was able to accomplish what I wanted by manipulating the IconicAdapter Class... is there any reason why I should not do it this way? I feel this could be modified for more advanced implementations. In my case, I know that I will have two sections, with a header + 2 rows in each section.

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Android :: How To Set Notifications Behavior On EVO?

Jul 13, 2010

Does anyone know how to set the notifications behavior on the EVO? Specifically with Google Talk? I would like the phone to beep at me only once when someone sends a google talk message, and then not ever again for the following messages until I unlock the phone's screen and reactivate the google talk app. I think it already works this way for email, but not for Gtalk. Can this be done? And, I already know that if I open up the chat session, the sounds shut off on successive messages. However I would like it to stop the beeping without opening the chat window.

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Android :: Customize Spinner Behavior

Apr 21, 2010

I want to customize the spinner behavior a little bit. I want to add a couple of buttons at the end of the drop down menu that is displayed when the user selects the control. Any idea how this could be done?

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Android :: Odd Behavior With A Search Activity

Oct 24, 2009

I have a package with two activities

1. A main activity 2. A search activity

The search activity is invoked by a search suggestion provider in two possible ways

1. By clicking directly on a suggestion invoking the search activity through a VIEW action 2. By clicking on the explicit search icon invoking the activity through SEARCH action

If it is invoked through SEARCH I stay on the search activity and show some text to the user. Now when I click the back button I go back CORRECTLY to the home page.

ODD Behaviour: However if I came to the search activity through the VIEW, I invoke a browser activity and call finish() on the search activity. Now I have the browser in my view. If I now go back I would expect to go back to teh device home page. But from now where the "main activity" is showing up.

I see in the logcat a message from ActivityManager indicating

moveTaskToBack: 8

I have tried various flags to invoke the browser activity the tried flags include new task previous is top and I have also tried both a singleTop and otherwise with the SearchActivity as well. Same end result.

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Android :: Behavior Of Activity For Cases

Mar 18, 2010

1. I want to know the behavior of activity for the cases where onStop and on Destroy were not called like low memory situations.
2. I was registered my handler in on Create() and unregistering in on Destroy, what is the behavior if other thread sends messages to the registrants after the activity was killed by android without calling on Destroy. I know that those handler were not removed by GC as they are still referring by the thread.
3. Also suggest me to handle the above situations.

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Android :: Select Behavior Of TextView

Oct 18, 2010

I have a TextView which is inside a LinearLayout which is in the child position of an ExpandableListView. Without assigning a color state selector to the text view, the following behavior is observed:Text unselected - text paints as white Text selected - text paints as black.If I add a color state selector with a call to text.setTextColor(R.color.textcolorstatelist) then the following behavior is observed:Text unselected - text paints as black Text selected - text paints as black.I tried two versions of textcolorstatelist.xml and both produced the results above.

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Android :: Inconsistent Handler Behavior

Sep 30, 2010

I am using a handler inside my service to display notifications at a certain time using the Handler.postDelayed method. My application runs fine on the emulator just as expected satisfying all cases. But when I installed the same on my HTC Wildfire, it simply doesn't happen as anticipated. Notifications are displayed at a random manner after the scheduled time and some notifications even fail. I'm monitoring my service from the Applications > Running Services and still my service is active.

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Android :: Inconsistent Ringtone Behavior

Mar 16, 2009

I am trying to add ringtones to the media/ringtones folder from my application. If the phone is connected via USB to a computer or mounted on my Mac, the ringtones do not show up in the SD Card, nor in the Ringtone settings.

But if I run the application with the USB unplugged, the ringtones appear ok. This is not a problem with Ringdroid which does the same thing.

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Android : Use To Try And Duplicate Behavior Of An App Upgrade?

Jul 13, 2009

I changed my database schema on my application to include an additional column in one of the tables. I did this in the onUpgrade method in the DBHelper.

Then I tried exporting my signed application and reinstalling it using the 'adb install -r <app>.apk' command to try and 'simulate' an application upgrade, but onUpgrade never gets called.

Is there a command that I can use to try and duplicate the behavior of an application upgrade?

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Android :: Set Behavior For An Inflated View?

Oct 1, 2010

I have an audio player toolbar activity that has a corresponding layout file.

I need this player to show up at the bottom of another activity. I use a ViewStub and inflate the audio toolbar's layout file in the stub.

How do I access the buttons, etc on this inflated view and how do I set their behavior?

The docs on ViewStub did not mention anything about this (or maybe I totally overlooked something).

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Android :: Sleep - Screen Behavior Documented

Oct 1, 2009

I'm looking around and trying to find out where sleep behavior is documented - and I mean in the general sense.

When the phone is left alone: * Sometimes the phone screen dims and doesn't shut off. * Sometimes the phone screen goes dark in five seconds * Sometimes the menu lock happens. * Sometimes the menu lock doesn't happen. * Sometimes the only way to darken the screen is to push the power button.

What's not clear is what triggers these different states. I'm looking for a complete list I can use in testing and application validation.

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Android :: Difference In Behavior Between HTC / NexusOne / SDK 2.1-update1

Jun 7, 2010

I wrote an app that invokes the contact manager in the following way: Intent pickcontact = new Intent(Intent.ACTION_PICK, People.CONTENT_URI); startActivityForResult(pickcontact, CONTACTPICKED); I am experiencing 2 different behavior between HTC phones and the NexusOne, all with firmware 2.1-update1. (i.e., my application is getting access to all my contact along the primary phone number of that contact list). On HTC phones however (incredible and the hero), the list of contact I get represents some sort of index as opposed to the actual contact name/phone number.

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Android :: Behavior Of SingleTask Not Consistent With Document

Mar 31, 2010

I have an app with two activities, one of which the launchmode is set to "singleTask". From the Android dev guide, I got the impression that my SingleTaskActivity should start a new task (or reuse an old task) and always sit at the root of the stack when launched.

However, it's inconsistent with the behavior of the app if I follow the steps below: - launch StandardActivity from home - click the "home" key - launch SingleTaskActivity from home, you will see it's in the foreground as expected - click the "Back" key, StandardActivity comes to the foreground whereas I expect to see the home screen because SingleTaskActivity is supposed to be at the ROOT of the stack. It appears SingleTaskActivity was launched into the task that StandardActivity started, rather than starting its own task.

Is my understanding about the "singleTask" launch mode correct?

=== The Android Dev guide (http://developer.android.com/guide/topics/ manifest/activity-element.html#lmode) says:

In contrast, "singleTask" and "singleInstance" activities can only begin a task. They are always at the root of the activity stack. Moreover, the device can hold only one instance of the activity at a time — only one such task.

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

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Android :: Inconsistent Premultiply Behavior In Bitmap

Sep 28, 2010

I have noticed that loading an image into a GLTexture using

CODE:........

Will create a texture with premultiplied alpha. Not a problem, as long as I use glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA) to blend instead of glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA) which will cause dark borders.

However, I've found that if I render text onto the Bitmap and convert to glTexture using:

CODE:........

The resultant texture is NOT premultiplied, and using glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA) will cause ugly over- saturated edges when blended into the 3D world. Blending using glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA) makes it look right again.

To confirm this, I saved the bitmap into a PNG file and load it as a resource into a texture, and the resultant texture is premultiplied and renders correctly using glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA)

Is there a way to force the text rendering onto the bitmap to be pre- multiplied?

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Android :: IME Options Behavior Is Inconsistent Across Different Devices

Jun 4, 2009

I noticed that the imeOptions attribute on TextViews behaves inconsistently across different devices. For instance, setting imeOptions to "normal" has the following effects:

1) On the emulator and G1s running 1.5: The OSK will have a "Done" key and clicking it will simply close the OSK with no further action taken (this is exactly what I need)

2) On my HTC Magic (G2), also running 1.5 (of course): The OSK will have an enter key (showing the enter symbol instead of "Done") and when clicking it, the OSK will close and bring up the context menu of the text view... I mean, seriously. That is the last thing any user or developer would expect it to do.

There seems to be no way to simply close the OSK after entering some text on the G2, *except* when specifying flagNoEnterAction in imeOptions, which on the G2 does what "normal" does on the G1, but on the G1, this will lead to the OSK to not respond at all to the enter key (user has to hit "back" to close the OSK).

This is a complete mess, is there any way to have the OSK behave in a sane manner without resorting to hacks (like checking for device models and setting imeOptions programmatically)? Didn't Google say they cared about backwards compatibility before releasing Cupcake? I have nothing but trouble getting my app to look and behave identical on different Android models.

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Android :: Audio Video Inconsistency Behavior?

Aug 12, 2009

In my app, a user picks video content with Intent i = new Intent(Intent.ACTION_GET_CONTENT); Code...
Why is the behavior for video and audio different?

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Game :: Best Strategy To Implement This Behavior In Android App?

Jul 2, 2010

In my Android app, I have some data that needs to be synced daily but also needs to be updated every hour when a user is inside the app. I have already implemented a service that gets called from an alarm for the daily update. I'm having a problem with developing a strategy to do the hourly sync. I could use an hourly alarm too and fire the same intent, but since your app can be killed at any time, there would be no way to cancel it (and since they use the same Intent, doing a cancel would cancel ALL alarms including my daily sync, so that's probably not good). The other option is to use a Timer that's set when inside the app, and have that fire my Intent when inside the app. I'm assuming all Timers get canceled when an app is killed right? But my app consists of several activities and I want the timer to work across all activities, how do I do that? I dont want to duplicate code - we're already using a subclass for Activity and ListActivity.

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Android :: List Item Selected Behavior

Sep 28, 2010

When I change the background color of a list item it no longer flashes green when selected. Is there a way to retain this default behavior when the background is changed?

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Android :: Undefined Behavior With GetResultExtras And SetResultExtras

Oct 7, 2009

I've created a test project with three identical classes that extend BroadcastReceiver, named

TestReceiverOne TestReceiverTwo TestReceiverThree

They each have the following function as their content:

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

I've added each BroadcastReceiver class to the manifest, have it accept the appropriate action/category, and start debugging. I've set breakpoints in the onReceive method of each test class, and in the anonymous inner BroadcastReceiver in my onCreate.

Unfortunately, I seem to be getting somewhat undefined behavior. Sometimes getResultExtras in my second onReceive will return null. Sometimes getResultCode in the second onReceive returns 0. Sometimes I'm 1 off in my third onReceive. Sometimes I get the wrong numResults in onReceive in my activity.

Is there some other behavior I have to specify when using setResult and getResult in an ordered broadcast?

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Android :: What App That Defaults Ended Calls Behavior

Jan 12, 2010

What's the app that changes the default end call behavior? I believe it gave multiple options beyond defaulting to the call log, as I frequently misdial after ending a call.

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Android :: Disable 2 Spaces Period Behavior?

Mar 2, 2010

I'd like to disable the feature of virtual keyboard of 2 spaces gives a period.

I noticed that configurations for the hardware keyboard have this option.

I'm using Android 2.0 on Motorola Milestone

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Android : How To Control A TextView's Select Behavior?

Oct 15, 2010

I have a LinearLayout with two views in it, an ImageView and a TextView. The ImageView resource is actually pulled from an xml selector in res/drawable so that it shows one of two drawables, call them selected.png and unselected.png. When I call LinearLayout.setSelect(false) the unselected.png drawable appears and the text is drawn in white. When I call LinearLayout.setSelect(true) the selected.png drawable appears and the text is drawn in black. How can I change this behavior of the TextView so that it always draws in white?

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