In a list, is it possible to have different kind of views, inflated from different layout XML?
I started with the sample in the API Demo, using the Efficient Adapter, and it starts like this Code...
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I have a little problem. I have class
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When I do that, method convertView.setBackgroundColor(Color.RED) work great, what I need Image is there:
dl.dropbox.com/u/866867/stack/device2.png
But when I want to remove that item, I can't do it. I add there convertView.setVisibility(View.GONE); , but have empty item, beside hide it. I read that parameter View.INVISIBLE won't hide layout, but View.GONE have, but in my code, doesn't.
And that image: http://dl.dropbox.com/u/866867/stack/device.png
I am trying to put together a modal box with a scrollable list of checkable items and an OK and Cancel button at the bottom for the user to select filters from. It seems the simplest way to do things like this in Android is to reuse API components (widgets, layouts, etc) and the closest one I can find to this looks to be the ListPreference, which basically does exactly what I want (I can even work with storing the data in SharedPreferences). The problem is that I'm not launching this modal box from a PreferenceActivity, but rather will be launching it from either of two activities: a ListActivity and a MapActivity.
View 1 Replies View RelatedIn Android, what functionality do ListActivity and ListView provide beyond a regular Activity and View?
View 2 Replies View RelatedPDF, docx, xls, ppt. Is there an application on the market that allows me to view all these types of files? I have seen a few, but they all get crappy reviews. Anyone have one that works for them? Also, is it free or paid?
View 3 Replies View RelatedI'm having a problem with my ListView in a ListActivity with a Custom ArrayAdapter.
When the ListActivity becomes hidden (paused, whatever), the data that was present in the ArrayAdpater seems to go away. Rotation works fine, but I am only assigning the array in the ArrayAdapter in the onCreate(), nowhere else. The array is stored in a global static so the array itself should be fine. but the ListView seems to be pitching the array somewhere after the onCreate in the Activity Lifecycle.
I'm thinking the array should be re-assigned on one of the onResume(), onStart() or onRestart(), but I'm looking for a more concrete reason as this happens only rarely and never with my Cursor based Adapters.
How does BaseAdapter communicate with its ListView? I was wondering how the BaseAdapter.notifyDataSetChanged() method notifies the attached View that the underlying data has been changed and it should refresh itself? When creating a BaseAdapter you attach it to the View with.So the ListView then knows it's adapter to get list elements. But you never tell the BaseAdapter what ListView it is attached to. So when you call BaseAdapter.notifyDataSetChanged() how does it reach the View to tell it to refresh itself?
View 3 Replies View RelatedFor Google about BaseAdapter class
In Android 1.6 and 2.0 the BaseAdapter class has apparently been modified to throw an exception when it sees the Adapter.getCount() method return a number different than what it picked up when BaseAdapter.notifyDataSetChanged() was called (at least I did not observe this behavior in pre 1.6).
So now the question is, when should one call notifyDataSetChanged() or more importantly, when can the count in the Adapter be safely changed?
Consider the case of an app with a background thread delivering data to a BaseAdapter at a rate faster than the ListView responds to notifyDataSetChanged(). Because notifyDataSetChanged() is a synchronous call and the ListView updates are taking place sometime in the indeterminate future on the UI thread, how can an app know when it is safe to change the adapter count?
If the app changes the count while the ListView is updating itself the exception will be thrown (and there is no way to catch the exception).
Is there a way to know when it is safe to change the count in the BaseAdapter?
I am using BaseAdapter for displaying the list. This list is fetched by calling a Web Service. At a time only 20 records are returned. Now, when the scroll of the BaseAdapter reaches the last record then the application should fetch more records from the server.
So, what I want to know is how to know the scroll position or some other way of knowing that the last record has been reached so fetch more records from the server. I don't want to implement the next and previous button on the screen.and so am trying to implement it in this manner.
In my android application I have custom listview with an image and textview. In extended BaseAdapter under getView method click events of textview and image are associated with onClick method using setOnClickListener as shown in code below
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And
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When clicking on image it acutally deletes that entry from List which works fine, but on clicking textview i would like to return the text of clicked textview to main activity but I am unable to achieve this, although I can do this from setOnItemClickListener of this custom listview acitivity.
I have Parsed the Json Response and Now I want to use the BaseAdapter Class in my Application. I have a rough Idea about the BaseAdapter Class but not very clear about the same. what exactly the Base Class does.
Also do I need to use the Getter and Setter Methods if I am using the BaseAdapter Class in my Application?
I custom the BaseAdapter to show image array with full-screen mode. I want the user can flick the images so I use the gallery class.When a image displays on the screen, a correlative sentence should be showed as well. The issue is the position param in getView function jump abnormally, especially when I flick into more one picture at a time. Therefore the string is showed incorrectly, I don't know why the image still displays normally. Here is my code...
View 4 Replies View RelatedI've tried to describe this problem a few times, but I'll try again.I have a thread (not spawned from the adapter) which updates items in a List that a BaseAdapter child uses to populate its view. I am not adding things in the List from the thread, just modifying content. In any case, I have 6 rows visible at first on the screen. The thread pulls data from the network and updates them in 0, 1, 2, 3, 4, 5 order. However, when 0 is updated, 5 mirrors its data on the screen briefly, then 1 is updated, 4 mirrors it, 3 is updated, then 4 is reloaded correctly, then 5, then 6. I am using the view holder/ convertView pattern correctly, as far as I can tell.How many views are created by default for an adapter? My guess is 3 based on what I see. Then, when getView() gets to index 4, 5, or 6, it correctly creates more Views and populates the right data. Anyone ever seen anything like this?
View 17 Replies View RelatedI'm trying to get my first Android app stable enough for the marketplace, and I've hit a brick wall with one exception that I don't understand. Probably I'm doing something stupid, but I can't tell what, and after several hours googling and experimenting, I thought I'd see if I can get some help. My Activity extends ListActivity, and the parts I think are most important are extracted below:
GroupedListAdapter is a simple class that extends BasedAdapter to provide headings for sections of the list (not unlike the Fancy ListView tutorials that are floating around).
I create this in onCreate, and it works fine. Inside onListItemClick, I do some actions which will create a different set of list contents. I "clear" the adapter, which empties the contents, and call reload, which repopulates it. Then I call notifyDataSetChanged.
Most often, this seems to work, but also fairly often, I get the exception following the code snippets below - this seems to indicate the ListView is not in sync with my changes. Lately this crash happens 100% of the time under the simulator.
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Data being pulled from a local DB, then mapped using a cursor. Custom Adapter displays data similar to a ListView. As items are added/deleted from the DB, the adapter is supposed to refresh. The solution attempted below crashes the application at launch.
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Errors:
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How to invoke the getView method in the baseAdapter in Android from another WebService Bean?
The adapter in my code as follows, I extends the base adapter code...
I made the connection between my service WCF and my app android. But i'm wondering if u have ideas about using complex types (classes created on the server side). should i implement the serialization process? or should i juts create the classes on my client side(android)
View 8 Replies View RelatedWe can launch the app in two ways, 1 is form the app, clicking on device back button till we reach the android home screen and launching the app or 2nd is from the app we can click the device home button and then we can launch.
How can we differentiate these to launches? In 2nd type launch onrestart will be called, onrestart will be called in some other cases also. I want to do something in the 2nd type of launch. Can any one tel me how to do this...
http://androidplayground.net/web/
they have been spamming the market all day, hope someone can get them shut down.
I'm trying to make a ListView when every item in that list can be a different type of View. for example the list could be: 1. TextView 2. ImageView 3. MyCustomView
I understands that in order to make a list I need to use an Adapter. the problem is that the Adapter uses a single layout for all of the list items, which will not support the different views.
my goal is to make an abstract View list when I can dynamically add and removes items in that list (each item is a View or subclass of it).
I've been working with Android for well over a year now, but I still have trouble determining when different types of messaging/communication between processes/threads should be used. I'm mainly talking about broadcasting Intents, using AIDL for services, using Handlers to send messages and socket communication.
Many of these tools can be used to accomplish similar tasks, but which is better suited to particular situations?
just wondering if anyone else here ever has this issue and if theres something to fix it? im using swiftkey and sometimes it just decides to go nuts and types a letter 2 or 3 times even though i only hit it once and then the word suggest screws up and also when i hit the spacebar once it goes nuts and puts in a period and starts a new sentance.
View 2 Replies View RelatedI want to implement a generic, thread save class which takes the RessourceId of an ImageView and the Url (http) where the desired image file is stored. It'll download the image and fills the src of the ImageView in the UiThread.
I thought AsyncTask would be the best thing for me. However I noticed that I only can pass one type of parameters to the doInBackground() Method. Like an Array of Urls. Is that true? What would u suggest me?
I have a weird issue, I have a Bluetooth speaker that I used for music on my Blackberry Storm, the storm automatically recognized that the speaker was a speaker, but the droid recognizes it as headphones, which is an issue, because the speakers are a2dp, and it's using the headset profile, which makes the sound quality SUCK!
Anyone have any idea how I can change it? I've tried unpairing and repairing it like 3 times now...
Is there any way (and preferably a pre-existing tool) to view the external features of an app, in particular the MIME types an activity supports?
View 5 Replies View RelatedI can't seem to find out how a MIME type is found. For instance, say I want my application to bring up Contacts. Where can I find the MIME type for that task? I currently have the following:
Intent intent = new Intent(); intent.setAction(Intent.ACTION_GET_CONTENT); intent.setType("*/*");
Intent newIntent = Intent.createChooser(intent, null); startActivityForResult( newIntent , SHOW_VERIFY_ACTIVITY );
And the wildcards work. But I would like to be more explicit. Like the following:
intent.setType("vnd.android.cursor.item/contacts");
...but is not valid.
Is there a way to use setType() and supply multiple broad types (like images and video)?
I'm using an ACTION_GET_CONTENT. It seems to be working with just comma-separated types.
When changing the custom locale the label of the phone types change to the appropriate language. Does anybody know how to get the localized label of the phone types?
I pick a contact in my app to get its phone number and if there is more then one number I use an AlertDialog to let the user select the currect one. In this pick list, I want to show the label of the type, so it's easier for the user to select. Since they labels are somewhere in the Android system, it must be possible to get the localized label. Unfortunately, the Phone.LABEL is null when reading the phone number.
ViewHolder pattern improves ListView scrolling framerate, as seen in following example:
http://developer.android.com/intl/de/resources/samples/ApiDemos/src/com/example/android/apis/view/List14.html
Is it possible to keep this pattern while using different kind of Views for different rows?
In other words, is it possible to do something like:
public View getView(int position, View view, ViewGroup parent) {
// calculate viewID here
if (view == null || *view is not null but was created from different XML than viewID* ) {
view = mInflater.inflate(viewId, null);
Is there a way to launch a viewer for common file types like TXT, DOC, XLS, PDF from within an app, like Gmail does. Maybe a Google Docs api to pass the file to GD and have it open in the browser?
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