Android :: Load Part Of An Array Into ListAdapter?

Jul 9, 2010

My code works like this to list all items in my String array - itemsarray

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

However, I know by this call that I only want to list the first X number of items from itemsarray. How can I load only the first X items form itemsarray into the ListAdapter?

Android :: load part of an array into ListAdapter?


Android :: Listadapter - Record Selection Made By User In Array

Apr 6, 2010

I am trying to record the selection made by the user in the array. But when I run the app, it crashes the moment I click something.

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

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Android :: How To Load Dynamic Array From Vector?

Feb 1, 2010

how to load dynamic array from vector in android?

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Android : Spinner Cannot Load An Integer Array / Way To Fix

Apr 19, 2010

I have an application, which has a Spinner that I want populated with some numbers (4,8,12,16). I created an integer-array object in strings.xml with the items mentioned above, set the entries of the Spinner to the integer-array, and when I run the app I get:

04-19 23:38:48.016: ERROR/AndroidRuntime(10193): java.lang.NullPointerException
04-19 23:38:48.016: ERROR/AndroidRuntime(10193): at android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:355)
04-19 23:38:48.016: ERROR/AndroidRuntime(10193): at android.widget.ArrayAdapter.getView(ArrayAdapter.java:323)
04-19 23:38:48.016: ERROR/AndroidRuntime(10193): at android.widget.AbsSpinner.onMeasure(AbsSpinner.java:198)
04-19 23:38:48.016: ERROR/AndroidRuntime(10193): at android.view.View.measure(View.java:7965)
04-19 23:38:48.016: ERROR/AndroidRuntime(10193): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:2989)
04-19 23:38:48.016: ERROR/AndroidRuntime(10193): at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:888)
04-19 23:38:48.016: ERROR/AndroidRuntime(10193): at android.widget.LinearLayout.measureVertical(LinearLayout.java:350)
04-19 23:38:48.016: ERROR/AndroidRuntime(10193): at android.widget.LinearLayout.onMeasure(LinearLayout.java:278)
04-19 23:38:48.016: ERROR/AndroidRuntime(10193): at android.view.View.measure(View.java:7965)
04-19 23:38:48.016: ERROR/AndroidRuntime(10193): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:2989)
04-19 23:38:48.016: ERROR/AndroidRuntime(10193): at android.widget.FrameLayout.onMeasure(FrameLayout.java:245)
04-19 23:38:48.016: ERROR/AndroidRuntime(10193): at android.view.View.measure(View.java:7965)
04-19 23:38:48.016: ERROR/AndroidRuntime(10193): at android.widget.LinearLayout.measureVertical(LinearLayout.java:464)
04-19 23:38:48.016: ERROR/AndroidRuntime(10193): at android.widget.LinearLayout.onMeasure(LinearLayout.java:278)
04-19 23:38:48.016: ERROR/AndroidRuntime(10193): at android.view.View.measure(View.java:7965)
04-19 23:38:48.016: ERROR/AndroidRuntime(10193): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:2989)
04-19 23:38:48.016: ERROR/AndroidRuntime(10193): at android.widget.FrameLayout.onMeasure(FrameLayout.java:245)
04-19 23:38:48.016: ERROR/AndroidRuntime(10193): at android.view.View.measure(View.java:7965)
04-19 23:38:48.016: ERROR/AndroidRuntime(10193): at android.view.ViewRoot.performTraversals(ViewRoot.java:763)
04-19 23:38:48.016: ERROR/AndroidRuntime(10193): at android.view.ViewRoot.handleMessage(ViewRoot.java:1632)
04-19 23:38:48.016: ERROR/AndroidRuntime(10193): at android.os.Handler.dispatchMessage(Handler.java:99)
04-19 23:38:48.016: ERROR/AndroidRuntime(10193): at android.os.Looper.loop(Looper.java:123)
04-19 23:38:48.016: ERROR/AndroidRuntime(10193): at android.app.ActivityThread.main(ActivityThread.java:4310)
04-19 23:38:48.016: ERROR/AndroidRuntime(10193): at java.lang.reflect.Method.invokeNative(Native Method)
04-19 23:38:48.016: ERROR/AndroidRuntime(10193): at java.lang.reflect.Method.invoke(Method.java:521)
04-19 23:38:48.016: ERROR/AndroidRuntime(10193): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
04-19 23:38:48.016: ERROR/AndroidRuntime(10193): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
04-19 23:38:48.016: ERROR/AndroidRuntime(10193): at dalvik.system.NativeStart.main(Native Method)

As soon as I changed the array to a string-array, this works fine. Is this normal? I realize that I can (and will) just convert the string array values to an int, but it seems weird that I have to.

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Android :: Convert Json Array To Normal Java Array

Aug 3, 2010

Is there a way to convert JSON Array to normal Java Array for android ListView data binding?

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Android :: Converting Byte Rgb_565 Array Into Argb Or Rgb Array

Jan 12, 2010

I have Picture data in byte rgb_565 array, and I want convert it in a productive way into argb array. Right now I have found only one (little slow) way to do this: Bitmap mPhotoPicture = BitmapFactory.decodeByteArray(imageData, 0 , imageData.length);

where imageData is my byte[] array in rgb_565, and then: int pixels[] = new int[CameraView.PICTURE_HEIGHT*CameraView.PICTURE_WIDTH]; mPhotoPicture.getPixels(pixels, 0,PICTURE_WIDTH, 0, 0, PICTURE_WIDTH, PICTURE_HEIGHT);

The point is I believe creating a Bitmap object is exacting and not necessary in this case. Is there any other faster way to convert rgb_565 array into argb array? I need this because making image processing on rgb_565 array seems to be a little annoying. Or maybe it is not so hard?

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Android :: Converting Short Array To Byte Array

Feb 16, 2010

I am trying to make an application that would be able to send the user's voice over the network using RTP. I am using the ported stack from hsc (JLIBRTP) and I am able to record user's voice in a saperate thread. the problem is that jlibrtp uses has a class named RTPSession that is responsible for the session and has the sendData method that takes a byte [] as argument and the AudioFormat class I am using to record user's voice is in AudioFormat.ENCODING_PCM_16BIT wich is short. I have tried using 8bit audioformat but I get an illigalargument exception in my htc magic and in my emulator. So is there any way I can convert the short [] to byte [] ? would that be acceptable in order of voice quality?, is the above error a known bug for htc magic or the platform doesn't support 8bit audio format?

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Android :: Navigating An Array - String Array

Oct 12, 2010

I'm new to android developing but right now I'm working on an application that displays Random Facts. Since I don't want it to be in a random order, I would like to have them in a list. I would like to order through them one by one and show them using TextView.

Resources res = getResources();
myString = res.getStringArray(R.array.FactsArray);

That's what I have so far. If I'm right, that just establishes the array so I can be able to use it later. What I had before was rgenerator which chose a random string from the array and displayed it when I clicked a button.

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

But Like I said, I would like to just order through them one by one when a button is clicked.

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Android :: Convert JSON Array To Array

Jul 27, 2010

Is there a simple way to convert a JsonArray to a standard Java Array? Obviously, you can iterate and do it explicitly, but I wanted to see if there was a direct way to do so.

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Android :: Insert Array Into Array

Sep 13, 2010

In my android application i need to insert an array into an array and access its values. Is there any way that i can get this done.

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Android :: ListAdapter Repaint ?

Mar 22, 2010

i have the following problem. I fill a ListView with a custom ArrayAdapter with data from a BD. However, in background, i'm updating those datas from the info provided by an API, so the idea is when the update finish, the adapter shows the updated data instead its "old version".

The problem is that when i do that, i notice a lag while the adapter is updating itself. Is the any efficient solution to avoid this?

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Android :: Listadapter Anchor ?

Jun 9, 2010

Lets say I have 1 - 1,000 in a list and I click on 250. When I push the back button I want to go back to 250 not all the way back up to 1. Is this possible?

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Android :: ListAdapter In Preferences ?

Oct 5, 2010

Is there a way to use ListAdapter in preferences screen ? or i must use only chekboxpreference, textpreferences, etc....

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Android :: Populating A Listadapter?

Feb 18, 2009

I've built an application that loads XML from a server, then creates a list of items and with that I create and adapter that I set with setListAdapter(my adapter);

The problem I'm having now is that creating the list and adapter takes time, so I was thinking on creating just like 20 entries and populate the list, then create the rest on runs background or maybe when the person gets to the bottom (like gmail application).

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Android :: ListView And ListAdapter

May 25, 2010

I am trying to use ListView and ListAdapter. If I create a simple Android project and add a ListView as the content view, and set it's adapter to my adapter based on ListAdapter, everything seems to work. My ListAdapter's 'getCount' is called, and I return 3, my 'getViewTypeCount' is called and I return 1, my 'getItemType' is called and I return 0, and for each item, my 'getView' is called and I return a TextView. Everything works, and the list is displayed with 3 items.

Now if I try and do the same thing in a more complicated environment, it does not work. My 'getCount', 'getViewTypeCount' and 'getItemType' methods are called, but the 'getView' method is never called and the ListView appears empty.

Now I know that I must be doing something wrong in the more complicated case, but I cannot see what it is. The code is really too involved to post here, but I was hoping that someone could give me some ideas as to why my 'getView' is never called even though I return 3 from my 'getCount' method.

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Android :: How To Notify ListAdapter

Jul 1, 2010

I'm crating tab view using this tutorial: Link<http://developer.android.com/resources/tutorials/views/hello-tabwidge...>. Now I need to reload tab content data when user view that tab. is there any way to notify ListAdapter ?

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Android :: How To Notify ListAdapter

Jul 1, 2010

Is there any way to notify ListAdapter? Because i need to load Tab content data when user click in that Tab.

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Android :: Load Single App During Load And Not Allowing The User To Step Out Of It

Oct 22, 2010

I have been assigned the task to use an android tablet to run a single app in an enterprise setting. Ideally, when one switches on the tablet this app should be loaded perhaps during startup and the user need not step out of this app. The app logic itself is rather easy but I am wondering if it is at all possible to load a single app during load and not allowing the user to step out of it.

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Android :: String-array - Resource Into A String Array

Mar 31, 2009

I just want to read <string-array> resource elements into a String array. I don't want to make a view or anything and mess with adapters - just want to transfer the elements. Is there a built in class for this? Or do I need to treat the resource file as a regular file?

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Android :: Cant Dynamically Update ListAdapter For ListView

Mar 19, 2010

I have a problem with adding new items to ListView.

I use custom adapter MyListAdapter. I do that way:

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

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Android :: Perform A Click On A ListAdapter Or SimpleCursorAdapter?

Jul 20, 2010

I cant figure out how to perform an onClick on my ListAdapter.

Here is my code:

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

I want to be able to click on an item from the database, then go into a view that only contains info for that item. My class currently extends ListActivity. I've tried OnItemClickListener, but I dont know what else to use to make it work.

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Android :: ListAdapter - Cursor - Custom Layout?

Oct 12, 2010

I'm experimenting with the Android platform, and I'm beginning to love it, but right now I'm stuck, at this cursor/list adapter problem-thing.

The thing is, that I request a function, returning a data object, with several properties I'd like to map to different TextView's.

My list_item.xml

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

So what I would like to do is: Map a property of an array of objects to several fields in the file.

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Android : Using A ListAdapter To Show Database Data

Jun 22, 2010

public class List_View extends ListActivity {I would like to show stored data from database into a ListView. Code... Title and Date only.

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Android :: Possible To Load A Layout XML At Runtime And Load Into Activity?

Sep 4, 2010

Is it possible to load a layout XML at runtime and load into activity?

In my app, I have various types of data like Person, Company, City, etc; The requirement is to dynamically load the layout, find views by tags (property names like Person.name, Person.address) and then fill in data. For example, if user has selected an object of type Company, we want to load a company.xml layout, inflate it and then associate various properties (company name, company slogan, city, address, revenue) to tagged views. One possibility I see here is - each view in the layout will be associated with property-name as tag and then appropriate data will be loaded in appropriate views.

What should be the best design you would recommend?

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Android :: Want To Look At Source Code For ListAdapter Class Without Downloading

Nov 22, 2010

I want to look at the source code for the ListAdapter class without downloading the entire Android source code tree. Is there a way to do that?

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Android :: ListAdapter Populating Image (Icon) Source

Jun 7, 2010

I'm populating a list from the DB and I have a image field in the DB which contains a URL to a image file.

ListAdapter adapter=new SimpleCursorAdapter(this, R.layout.row, constantsCursor,
new String[] {"title", "subtitle", "image"}, new int[] {R.id.value, R.id.title, R.id.icon});

However, the other fields are populated, but the image remains empty. Why?

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Android :: ListView And Selected Items With A Custom ListAdapter

Oct 13, 2010

Android has ListView component which is quite nice. The problem is that I created my own adapter to supply viewitems for each item displayed and I don't get anymore: Background color change when i scroll the items using up/down arrows. Background color change when I select an item. How do I do that?

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Android :: Bind Data To ListView Without Preparing ArrayLists For ListAdapter?

Sep 14, 2010

I get my Models in a nice object-oriented form. In order to bind them to my List, I have to use the listAdapter. Can I only fill this listAdapter with stupid ArrayLists? Because that means, I have to iterate over my ModelCollection and pull all the data out of my Models again. So, I detach my data from the models and I cant easily refresh the data in my listView, if something chances in the modelCollection (like becoming bigger through new Items / pagination). Does a more intelligent way exist, than I use right now? Can I bind my ModelCollection more driectly to the listView?

ModelCollection modelCollection = ModelCategory.findAll();

/*
* Prepare Data for Adapter
*/
ArrayList<String> itemTitles = new ArrayList<String>();

// Iterate over my ModelCollection and pull all the Data from each Model
for (int i = 0; i < modelCollection.items.size(); i++) {....................

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Android :: Java.lang.ClassCastException When Using Self-defined ListAdapter In Listview

Mar 11, 2010

I am writing a adapter for a specific app, the problem I met is:

I have only 1 listview in main.xml, and the row style is defined in file_row.xml. If I simply use list.setAdapter(new ArrayAdapter<String>(this, R.layout.file_row, R.id.file_name, items)); where items is a ArrayList<String>, everything works well.

But if I use my custom Adapter, say, list.setAdapter(new MyOwnListAdapter(this, filename)); and in the class of MyOwnListAdapter, the code has been simplified as

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

But I always met the problem which is:

CODE:.........

I thought the self-defined Adapter class actually has only one line of valid execution, which is super(context, R.layout.file_row, R.id.file_name, filename_list); It's essentially identical to direct calling of list.setAdapter(new ArrayAdapter<String>(this, R.layout.file_row, R.id.file_name, items)); Then why I always got this error if I call my own Adapter?

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Android :: AlertDialog Doesn't Display Items From ListAdapter Hide Options

Feb 25, 2010

When I try to set the Alert using ArrayAdaptor to display a set of items, the list is displayed but the items' characters are invisible. If the item is selected, then the characters are visible. Scratching
my head on why. Appreciate any advice.

Below is the code and the screenshot from the emulator.

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

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