Android :: Detect In An Adapter When Getview() Returned View?

Jul 15, 2010

I have a list and i want to check is the view is returned so i can call loadingAnimation.start() to make a imageview insite listview animate
Let me tell you what i mean.. code...

Android :: Detect in an adapter when getview() returned view?


Android : Leaking Bitmaps From Adapter's GetView

Mar 31, 2009

I definitely have a memory leak problem and i'm trying to figure out there. After 6-10 config changes i'm getting out of memory in regards to BitmapFactory. I'm kind of suspect that this is going on within adapter. I have a listview . ListItems are an thumbnail image ( ImageView ) and TextView for text.

Here is the getView code.

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

And get ThumbnailBitmap() is basically BitmapFactory.decodeByteArray ..

Is it possible that i'm leaking drawables ? Heap is not increasing by the way .

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Android :: Way To Handle Multiple GetView Calls From Inside An Adapter?

May 20, 2010

I have a ListView with custom ArrayAdapter. Each of the row in this ListView has an icon and some text. These icons are downloaded in background,cached and then using a callback, substituted in their respective ImageViews. The logic to get a thumbnail from cache or download is triggered every time getView() runs.

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Android :: Adapter Filtering Via GetView Still Leaves Gray Lines

Sep 23, 2010

My application uses a list of media files on the phone, i.e. images, audio and video. It also allows the user to filter the list via some checkboxes in a menu, so the user can choose to show or hide each type of files. The way I've been doing this is by putting this in the adapter's getView():

// don't show unwanted file types if (cmo.hasType(MediaType.AUDIO_FILE)){
if(!prefs.getBoolean(PREFS_SHOWAUDIO, true)){ return new ViewStub(mContext);;
} }else if(cmo.hasType(MediaType.IMAGE_FILE)){ if(!prefs.getBoolean(PREFS_SHOWIMG, true)){
return new ViewStub(mContext);;
} }else if( cmo.hasType(MediaType.VIDEO_FILE)){ if(!prefs.getBoolean(PREFS_SHOWVIDEO, true)){ return new ViewStub(mContext);; } }

Which is quite effective in the sense that the list doesn't show those elements. However, the ListView still renders a 1px grey line between each View, even if they are ViewStubs, meaning I see a thick gray line whenever a group of consecutive items are filtered away. How can I get rid of those lines? Should I create a new data array, containing only the elements that should show a view?

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Android :: ConverView Parameter In GetView() Of My Custom Adapter For Gallery Is Always NULL

Nov 14, 2010

I have made customAdapter (which extends BaseAdapter). I want to reuse the old views..

So I am checking:

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

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Android :: Display Every Other String Within View GetView()?

Jul 19, 2010

I've made a customAdapter that accepts an ArrayList. The ArrayList contains a title and then a link. code...

I'm wanting to display the title and then have the on click listener to have the link. I'm having trouble however figuring out a way to do this.

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Android :: Custom View Using Adapter Iface

Jan 31, 2009

I want to create custom View showing possibly several items. i think using Adapter interface would be good idea.

My question is: should i extend AdapterView? if so, what is the most imortant when doing this (e.g. AdapterView is ViewGroup, so how should i manage children)?

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Android :: Scrollbar In Adapter View Derived Object

Jan 11, 2010

I have a Adapter View derived class (say GridLayout) in which I arrange views in a grid. When items in the grid exceed the height of the GridLayout( or screen) I want a scrollbar to appear. I have handled scrolling in onTouchEvent. But the problem is the scrollbars don't appear. I have set the vertical scrollbar to be enabled, but no use. The docs say the scrollbar appears every time the scrollTo or scrollBy methods are called.

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Android :: Custom Adapter Implement Get View Method

Dec 7, 2009

I have implemented a custom adapter the extends from the BaseAdapter and implements the getView method. It works fine except for one thing, not once do I get the convert View (a parameter to the getView method) that is not null (that can be reused).

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Android :: Causes A Redundant Cursor Adapter To View Copy

Oct 28, 2009

CursorAdapter is great, i'm a big fan. I notice that both newView() and bindView() are passed Cursors, indicating that extracting stuff from the Cursor and sticking it in the view should happen inside those overrides.

however in the source for CursorAdapter.getView() i see that bindView() gets called whether the view is recycled or not. in the new view case, this causes a redundant Cursor to View copy.

IMHO, CursorAdapter should call newView() if the view couldn't be recycled, or bindView() if it could.

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Android :: List View Separators Using A Cursor Adapter

Oct 5, 2010

I have a ListView which is populated using a CursorAdapter. I'd also like to have some separators in my ListView. I have accomplished this with an ArrayAdapter, but I'm not sure how to accomplish this with a CursorAdapter. Are there any strategies for doing so? Or am I out of luck?

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Android :: Simple Cursor Adapter - List View

Jun 9, 2010

I have table with 3 columns which is binded to an XML document with three text views.

CODE:........

Depending on the value store in the third column, I have to decide whether i should display this row or not

How should, I go about with this.

This is what I have so far :

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

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Android : Want To Display As List View - Using Simple Adapter

Jul 12, 2010

I am calling one webservice.Result of webservice I am storing in an Array list. Result of webservice I want to display as list view. For ListView I am using SimpleAdapter. and SimpleAdapter is something like this:- SimpleAdapter adapter = new SimpleAdapter(this,hashmap, layout, from, to);

I am not able to put array list into hashmap. Is there anyway to do this?

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Android :: Filtered List View With Custom Adapter Not Updated

Mar 25, 2010

I have a ListView with a custom Adapter that extends ArrayAdapter. It's ArrayAdapter of Type Artist. (There are about 1200 artists in my list). Artist is a very small class that has a name and an id. The Artist Class has toString() overridden to return just the name. I have an EditText. The EditText has an TextChangeListener where I call .getFilter().filter(chars, callback) on my adapter. In the Filter.Filterlistener().onComplete() callback i print the count and it looks really good. As i type the count decreases. So it seams everything works as advertised, but the List stays the same. I tried to call artistAdapter.notifyDataSetChanged() to force the list to redraw, but nothing happens. [see 2.)]. I am tinkering around for days now! I am desperate. Hopefully someone can have a look on my code and tell me what I am doing wrong! How can I force the list to be redrawn?

Here is what I have done:
1.) Defined a ListView and an EditText like this:
<EditText xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/list_search_text"
android:layout_width="fill_parent"
android:layout_height="35dip"
android:layout_below="@id/header">
</EditText>
<ListView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/list_search"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
</ListView>

2.) Setup my ListView in the Activities onCreate():
private ListView listView = null;
private ArtistAdapter artistAdapter = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.search_artists);
artistAdapter = new ArtistAdapter(this, R.layout.row, list); // 'list' is an ArrayList<Artist>
listView = (ListView) findViewById(R.id.list_search);
listView.setAdapter(artistAdapter);
listView.setFastScrollEnabled(true);
listView.setTextFilterEnabled(true);
listView.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> av, View v, int position, long id) {
// do something } });
EditText txtSearch = (EditText) findViewById(R.id.list_search_text); txtSearch.addTextChangedListener(new TextWatcher() {
public void afterTextChanged(Editable arg0) { }
public void beforeTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) { }
public void onTextChanged(CharSequence chars, int start, int before, int count) {
artistAdapter.getFilter().filter(chars, new Filter.FilterListener() {
public void onFilterComplete(int count) {
Log.d(Config.LOG_TAG, "filter complete! count: " + count);
artistAdapter.notifyDataSetChanged();
}});
}});
}

3.) This is my ArtistAdapter in short. I added an remove() and add() method:
public class ArtistAdapter extends ArrayAdapter<Artist> implements SectionIndexer {
private List<Artist> items;
/* other stuff like overridden getView, getPositionForSection,
getSectionForPosition and so on */
@Override
public void remove(Artist object) {
super.remove(object);
items.remove(object);
}
@Override
public void add(Artist object) {
super.add(object);
items.add(object);
} }

4.) My artist has also the toString() overridden:
public class Artist implements Comparable<Artist> {
public String uid;
public String name;
public Artist(String id, String name) {
this.uid = id;
this.name = name; }
public int compareTo(Artist another) {
return this.name.compareToIgnoreCase(another.name);
}
@Override
public String toString() {
return this.name;
} }

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Android :: List View With A Custom Adapter / Items Can't Be Selected

Jun 2, 2009

I developed a List View with a custom adapter (which extends Array Adapter). The problem is that i can't selected or highlighted items. Is there a attribute to fix in the list View Layout or something else?

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Android :: Gallery / Adapter View Child Draw Able State

Oct 4, 2010

I am using a Gallery view where the view corresponding to each item is non-trivial and consists of text as well as multiple buttons. When I click to drag the gallery view (somewhere not on one of the buttons) the button's drawable state changes to pressed and appears as if all of the buttons are currently being pressed. Additionally, the same behavior happens for the selected state (e.g. all of the text of the child TextViews changes color). I am trying to prevent this behavior and have found the android:duplicateParentState xml attribute as well as the setDuplicateParentStateEnabled property. This seems like it should accomplish what I am trying to do, but it seems to have no effect.

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Android :: Add Childs To My Custom View Group With A Cursor Adapter?

Oct 13, 2010

I've got a schedule Class, which is simply a custom ViewGroup (with custom onMeasure() and onLayout()), which enables me to place childs(=events) with LayoutParams for column/row start and column/row end. The number of childs and their LayoutParams depend on database entries.

Now I'm trying to add childs (events) from my database. I'd have to use a Cursor Adapter, so my schedule Class has to extend ListView, right? I tried that but the newView() method of the adapter is never called. Why not? My custom ListView doesn't ask the adapter for childs, no childs are added. I also can't add the childs by hand calling schedule.addView() if I extend from AdapterView.

How can I add events to the schedule with the data from the cursor?

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Android :: How To Implement Position In Image Adapter To Return Customized View?

Jul 12, 2010

Sample code there is a method getitem(position) in the class of image adapter which returns null for the sample example. However, this method is important and is supposed to return the corresponding data item of the image adapter. For example the image adapter could generate a series of customized image views by magically calling the getview method. How could we implement the getitem(position) method under this case to help us gain access to these customized image views?

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Android :: How To Refresh Updated Contacts In List View Using Base Adapter?

Jul 23, 2009

Currently I am working on IM, and I am facing problem during implementations. I am implementing this messenger using XMPP client and using smack API for implementing all features like contacts list, online offline status, and chat also. Prblem which I am facing:

Its my list view where I am showing contacts list
public class ContactsList extends ListActivity implements OnClickListener{
@Override protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ContactsManager manager = new ContactsManager(this); setListAdapter(manager);
} public class ContactsManager extends BaseAdapter{
private LayoutInflater mInflater; private Bitmap mainListIcons[];
private static ContactsInfo contactsInfo; public ContactsManager(Context context) {
mInflater = LayoutInflater.from(context); mainListIcons= new Bitmap[3];
mainListIcons[0] = BitmapFactory.decodeResource (context.getResources(), R.drawable.online);
mainListIcons[1] = BitmapFactory.decodeResource (context.getResources(), R.drawable.offline);
} @Override public int getCount() { return Global.contacts.size();//
contacts is vector where I am saving my contacts
} public Object getItem(int position) { return position;
} public long getItemId(int position) { return position;
} public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder; if (convertView == null) {
convertView = mInflater.inflate (R.layout.main_settings_lists_icon_text, null);
holder = new ViewHolder(); holder.mainListDisplayText = (TextView) convertView.findViewById(R.id.main_settings_lists_text);
holder.mainListDisplayIcon = (ImageView) convertView.findViewById(R.id.main_settings_lists_icon);
convertView.setTag(holder);}else{ holder = (ViewHolder) convertView.getTag();
} contactsInfo = (ContactsInfo)Global.contacts.elementAt (position);
String username = contactsInfo.getUsername(); String status = contactsInfo.getUserstatus();
if(status.equalsIgnoreCase("unavailable")) { older.mainListDisplayIcon.setImageBitmap(mainListIcons[1]);
}else{ holder.mainListDisplayIcon.setImageBitmap(mainListIcons[0]);
} holder.mainListDisplayText.setText(username); return convertView;
} static class ViewHolder { TextView mainListDisplayText;
ImageView mainListDisplayIcon;}
public class ContactsHandler implements RosterListener {
@Override public void entriesAdded(Collection<String> c) {
for(String s:c) { Log.i("ADDED Contacts",s);
} } @Override public void presenceChanged(Presence p) {
Log.i("PRESENCE",p.getFrom()); Log.i("IS Available",""+p.isAvailable());
Log.i("UserStatus",""+p.getStatus()); if(p.getFrom().contains("@") && p.isAvailable())
{ ChatManager chatmanager = Connection.getVopConnection getXMPPConnection().getChatManager();
Chat newChat = chatmanager.createChat("gulfam@imran-mehmood", new ChatHandler());
} } }

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Android :: Contents Of List View - Using A Cursor Adapter - Are Not Updated Refreshed

Aug 26, 2010

I have a list which shows data from a database using a cursor adapter. Using Menu option I am updating my database (inserting more rows deleting existing rows). When Menu operation completes, I want contents of list should show updated contents.

I have tried using cursor.requery(); (or explicitly querying cursor again) and using adapter.notifydatasetchanged(), but with this list of contents are not updated.

How can I refresh the contents of the list.

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Android :: Detect Triple Tap On View?

Jul 20, 2010

I haven't spend much time on Gesture Detector or anything of that sort.

My requirement is very simple, Given a View (any view), how do I detect triple tap on that?

Of course a timer and a counter can help me, but I am looking for something more sophisticated that that.

For people, you are wondering, why I need triple tap, I am introducing a hack screen in an application (which I am porting from IPhone and IPhone does it that way, so I have to do it.

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Android :: How To Detect Doubletap On A View

Apr 14, 2010

I'm trying to have a View sensitive to double taps on an Android. So far, I learned to set up the double tap and know what place to handle the event for action code...

But How do I link it to the View? This is in a class that has a few View members.

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Android : Way To Detect Event From Web View?

Jan 26, 2010

I am developing an application which requires cancellation survey when user tries to deactivate application service. Cancellation survey i am using the third party survey software http://wufoo.com/gallery/templates/surveys/cancellation-survey/. I am able to render the survey (third party html) web view in my activity.When ever the user presses submit button on WebView, activity need to store the status of survey(like user successfully submitted or not). Is there any way to detect the event from web view?

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Android :: Custom Grid View With Array Adapter Out Of Sync With Backing Data

Oct 28, 2010

I'm have a custom GridView Array Adapter. The problem for me is that when the grid list gets large enough to scroll off the screen the gridview and arraylist get out of sync. For instance in my case I have code that checks if an actor is of type director the text color should be red. if you scroll up and down my list enough times all the actors text in my gridview will become red. The thing is that the Gridview appearance actually looks fine its the backing data. Here is the complete class. In the code you can see where I tried to override getItem and getItemId but that didn't fix anything. Code...

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Android :: Detect When User Taps On View?

Jan 10, 2010

I want to detect when a user taps anywhere in a view in my Android application. My code looks like this:

linearLayout = (LinearLayout) findViewById(R.id.linearLayout); // main layout
// ...
linearLayout.setOnTouchListener(this);
// ...
public boolean onTouch(View v, MotionEvent event) {
Toast.makeText(this, "Touch!", 1000);
if (event.getAction() == MotionEvent.ACTION_DOWN) {
Toast.makeText(this, "Down!", 1000);
return true;
}
return false;
}

but when I click on the view, I don't get Toast! Do touch events work in the emulator -- or have I got something wrong in my code?

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Android :: Detect A Change In EditText View?

Aug 23, 2009

My Application need to perform a database search when the user change the text in an EditText view. I need a method like onChange to allow me to know when the text in the EditText changed. How can I detect a change in the EditText view?

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Android :: Simple Cursor Adapter - List View - Binded To XML Document With Three Text Views

Mar 18, 2009

I have table with 3 columns which is binded to an XML document with three text views.

CODE:........

Depending on the value store in the third column, I want to change the text color in R.id.c. How should, I go about with this.

This is what I have so far :

COD:...............

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Android : Setting A Layout To Use As Empty View For A ListView In Case Adapter Has Zero Items In A Activity

Nov 16, 2010

How to use a layout as empty view for a listview when the adapter has zero elements?

setEmptyView is not working with this code :

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

Layouts used :

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

main.xml

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

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Android :: How To Detect Particular View Longclicked From Array Listview?

Feb 18, 2010

I have an array list of a view in my application. The view has both single click and long click listeners. To detect a particular view that is selected I'm using isPressed() for single click listener. Now how can I detect that a particular view is longclicked from the array list of view?

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Android :: Detect If View's Parent Activity Is Being Destroyed?

Jun 30, 2010

I want to do some cleanup in a view when the activity is being destroyed. Is there any way to get a callback in the View when the activity is being destroyed? I tried using onDetachedFromWindow, but I'm not sure whether it is correct thing to do.

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