Android :: HowTo Make List View Larger / More Than One Item Visible At Time ?
Jan 14, 2010
Does anyone know how to make a ListView object larger such that more than one Entry item is visible at the same moment ? Both parents are already set with "fill_parent" but the view continues to show one-and- a-half Entries.
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Jan 11, 2010
How can I change the first visible item in a list view (I searched a method such as setFirstVisiblePosition) ?
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Apr 9, 2010
I don't know exactly how to explain this problem, but I'll try. I have a ListView with several items. Each item has inside a TextView and two ImageView. I want the ImageView change when I click on them, and I want to open a context menu when I press for a long time into the ListView item.For the ImageView, everything works properly. For the whole item, I can show the context menu after a long press, but my problem is that the ImageView changes as well when I am pressing the TextView, for example.I hope you understand my problem. I think that all the children of a view are affected by an event in the parent, but I am not sure.
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Aug 20, 2010
I want to be able to tell if a view is visible in my listview, which is populated by a custom CursorAdapter. How can I do this?
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Jun 24, 2010
Is there a way to get the first visible View out of the ListView in Android?I can get the data that backs the first View in the Adapter but it seems I can't get the first View in ListView.I want to change the first visible view after a scroll action finished. I know that I should not save references to the view.
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Apr 23, 2010
I'm trying to create a multiple selection list where the selection is represented graphically rather than with checkboxes.My list has checkboxes, but I want them to serve a different purpose. I'm using a cursor to hold my data and created a custom view binder for the SimpleCursorAdapter. I did this for the checkboxes and general flexibility.So far I haven't even been able to show one line as being selected. I've enabled multiple selection on the list and denied the children of the list item focusability. I've tried manually changing background color with the position fed in through the list item click listener. But the wrong items get changed and they don't even change to the right color. I've enabled touch focusability with no improvement either.Ideally, I'd like the trackball highlight focus bar to appear in multiple places. But I don't think this is possible unless you use the drawable directly. But I don't know how to find or apply it. My next idea was to have a slim view bar that changes color. But I had the same problem with the wrong item being selected so I never finished trying to guess the index position to see if this would work. My most recent idea is to completely swap out the view for another one if it's selected. But I have no idea how to do this either. I'm thinking of using an array list to store the _id s of the items that need a different view to get around the wierd selection problem. I'm also thinking of passing in the ID field as my from and the selection view as the to for my adapter. Then I'd intercept it with my binder and change the view accordingly. But once again, I'm not sure how to do this successfuly.
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Jul 14, 2010
By Default in the Listview,focus will come on the list item.Instead of that, can I get only the border to the list item?I can achieve this by using a transparent image as a list selector.Is there any other simplest way to achieve this requirement?
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Jun 4, 2009
I have a list view which contains some 20 odd items along with a check box. Now when iam trying to delete an item by checking its checkbox,Now if I have six elements in this ViewList, which are visible on the emulator, then the same code just works fine. Problem arises when the list is long and it starts scrolling and some element are not visible.
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Nov 18, 2010
I was wondering if it's possible to have a contextMenu without any view..?Or any Dialog, acting simply like a contextMenu (a list of clickable items in fact)..?I can explain: on the first use of the app, a pop-up (ContextMenu) list all option modes.The actual trick is a button, registered for the ContextMenu and the firing is done by button.performLongClick().I don't want to have that button anymore, but I still want the ContextMenu.
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May 21, 2009
I have the list view which is having 10 Items. I want to block few items (Disable). How do i do this? Can any one help me?
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Dec 10, 2009
I'm developing an application which has an listview. I'm currently creating the list item view dynamically from code (linearlayout, which includes 2 textviews and 1 imageview), but i'd like to use an XML resource for this. I read it is resource intensive when getting this view using findViewById within a loop. I thought of using a custom adapter for this, but am not sure on how to include lazy loading of the image then.
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Feb 13, 2010
I have a list view having several items and it is multichoice list. I want to display the checked item of list view. how i can do this.can anyone help me?
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Nov 4, 2010
As I am reviewing and prototyping my android project, I noticed that there is a view that has a list of items that are very customized. I have figured out most of my tools that I plan to use but I need some advice.
I have a list of items which can contain photos, some text to the right, an image to the bottom and more text below that. Very confusing I know. Each of these might be present for an item. The only thing that will always be there is the title.
So my question - what is the best way to create each custom list item view? I am thinking I have to use this getView to create each view. But when creating each view, is it best to 1) create a view dynamically and adding an image, for example, if it exists, or 2) create an xml file with all possible elements and hide them depending on the item?
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Apr 9, 2010
I want to customize list view item spaces between different items. We generally display list item with default space between them to get viewed in list.I want to customize the space difference between them so that more data can be displayed in the list within the display part at a time
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Aug 12, 2010
I have a ListActivity where the list items are defined in another XML layout. The list item layout contains an ImageView, a CheckBox, a TextView and such.
What I want is to set an onClick listener to the CheckBox in each list item. That is easy enough. The trouble is I need that onClick handler to know which position in the list it is.
I'm attaching the listener to the CheckBox in getView after that convertView has been inflated. The getView method has a position parameter, but I cannot reference it in the onClick handler for my CheckBox. I understand why, but I don't know how to get around it. How do I accomplish this?
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Sep 6, 2010
What Iīm trying to do is to create a list (using a list view) of items (which are views inflated from the same layout) what must be clickable. At first I thought that all I had to do was to add an onItemClickListener to the ListView so if the used clicked on any of the views that composed this Item the listener would react. Well, I was wrong. Iīve tried a lot of things, including setting focus and focusontouchmode off for each of the views that compose the itemīs view but it still doesnīt work. Any tips here? Can I archive this result? Oh, also ... this list view is in a dialog and the listener is in the activity that builds the dialog.
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May 20, 2010
I need to implement a list view with checkbox and each item should be associated with images.
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Mar 22, 2010
How to remove item from a list view? how to reload the list after removal?
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Sep 16, 2010
Trying to set ContextMenu title according to the ListView clicked item.The ListView contains Bookmarks list -> FAVICON + BOOKMARK TITLE @Override public void onCreate Context Menu (Context Menu menu, View v, ContextMenuInfo menuInfo) {super.onCreateContextMenu(menu, v, menuInfo); menu.add(0, EDIT_ID, 0, R.string.menu_edit); menu.add(0, DELETE_ID, 0, R.string .menu_delete); menu.add(0, SHARE_ID, 0, R.string.menu_share); AdapterView. Adapter ContextMenuInfo info = (AdapterView.AdapterContextMenuInfo)menuInfo; View itemID = (info.targetView); menu.setHeaderTitle("bla" + itemID);when I run this code it shows the android.widget.RelativeLayout@423d2389 or whatever and if I change the itemID to String itemID = ((TextView) info.targetView).getText().toString(); I get force close on long click even though no errors are shown in Eclipse or when I run the app.I also want to get the favicon in the same way.
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Sep 2, 2010
I'm just beginning Android development, and I'm working to get a Custom list view with a checkbox working. I've created a base class that extends Activity, Created an Adapter and overrode the getView() method to add the checkbox to the list view. I'm assuming I need to do this because I need something equivalent to didSelectRowIndexAtPath from Obj C to update my model. Please let me know if there's an alternate way of doing this too Code...
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Apr 17, 2009
Im trying to change background color when an item is selected. Something like using a color selector, but actually it crashes. I've created a list_selector.xml inside /res/color/.<?xml version="1.0" encoding="UTF-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android"><item android:state_focused="true" android:color ="@ color/ plain_yellow"/><item android:state_pressed="true" android:state_enabled="false" android:color ="@color /plain _yellow" /><item android:state_enabled="false" android:color="@color/ plain_yellow" /><item android: state_active="true" android:color="@color/ plain_yellow" /><item android:color="@android: color/ transparent" /></selector> plain_yellow is a color i've defined in /res/values. I've tried to assign that selector programatically and using the xml, but the app crashes. Am i doing something wrong?
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Sep 2, 2010
I am new to android, and ended up (have to) ask a question here. Let's make it simple, I simply want to make my own TextView-like (MyView extends View), This is my code:
public class MyView extends View { private Paint mPaint;
private String mText; private Bitmap mBitmap1; private Bitmap mBitmap2;
public MyView(Context context) { super(context); initView(); }
public MyView(Context context, AttributeSet attrs) { super(context, attrs);
initView(); } private final void initView() { mPaint = new Paint(); }
public void setText(String text) { mText = text; }
@Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int measuredWidth = measureWidth(widthMeasureSpec);
if (mBitmap1 == null) initBitmap1(measuredWidth);
int measuredHeight = measureHeight(heightMeasureSpec);
setMeasuredDimension(measuredWidth, measuredHeight);
}
private void initBitmap1(int measuredWidth) {
mBitmap1 = Bitmap.createBitmap(measuredWidth, Fonts.getHeight(), Bitmap.Config.ARGB_4444);
Canvas canvas = new Canvas(mBitmap1 ); canvas.drawText(mText, 0, 0, mPaint);
} private void initBitmap2() {
mBitmap2 = Bitmap.createBitmap(30, Fonts.getHeight(), Bitmap.Config.ARGB_4444);
Canvas canvas = new Canvas(mBitmap2); canvas.drawText(mText, 0, 0, mPaint);
} private int measureWidth(int widthMeasureSpec) {
int measuredWidth = 0; int specWidthMode = MeasureSpec.getMode(widthMeasureSpec);
int specWidthSize = MeasureSpec.getSize(widthMeasureSpec);
if (specWidthMode == MeasureSpec.EXACTLY) { measuredWidth = specWidthSize;
} else { measuredWidth = getWidth(); if (specWidthMode == MeasureSpec.AT_MOST) {
measuredWidth = Math.min(measuredWidth, specWidthSize);
} } return measuredWidth; }
private int measureHeight(int heightMeasureSpec) {
int measuredHeight = 0; int specHeightMode = MeasureSpec.getMode(heightMeasureSpec);
int specHeightSize = MeasureSpec.getSize(heightMeasureSpec);
if (specHeightMode == MeasureSpec.EXACTLY) { measuredHeight = specHeightSize;
} else { measuredHeight = 80; if (specHeightMode == MeasureSpec.AT_MOST) {
measuredHeight = Math.min(measuredHeight, specHeightSize);
} } return measuredHeight;
} @Override protected void onDraw(Canvas canvas) {
super.onDraw(canvas); canvas.drawBitmap(mBitmap1, getLeft(), 0, mPaint);
initBitmap2(); canvas.drawBitmap(mBitmap2, getLeft(), 30, mPaint);
} }
In my code, I populate some numbers of MyView (let's say 20) in a ListActivity. My question is why mBitmap1's order changes randomly while i scroll (up-down) fastly (if I scroll slowly, this problem not occur)? mBitmap2 stays where those should be.
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Oct 17, 2010
Trying to implement simple dictionary. I want to make it so while the user is typing in the EditText box the list to scroll automatically to the best match. I don't want it to filter the list. For example if the user types "s" in the EditText I want the first word that s/he sees under the EditText box to be the first word in the dictionary that starts with "s." But the user should still be able to slide up and down and to be able to see the entire list of words. It is basically like a go to functionality. I used ArrayList to store my list of words. The data is in res/raw/data.xml file. Here is my onCreate method
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
wordListView = (ListView)findViewById(R.id.wordList);
myEditText = (EditText)findViewById(R.id.myEditText);
words = new ArrayList<Word>();
arrAdap = new ArrayAdapter<Word>(this, android.R.layout.simple_list_item_1, words);
wordListView.setAdapter(arrAdap); try {
InputStream inSource = getResources().openRawResource(R.raw.data);
DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
Document doc = builder.parse(inSource, null);
NodeList wordsList = doc.getElementsByTagName("eng-bg");
int length = wordsList.getLength();
for(int i = 0; i<length; i++) {
Element entry = (Element)wordsList.item(i);
Element eng = (Element)entry.getElementsByTagName("english").item(0);
Element bul = (Element)entry.getElementsByTagName("bulgarian").item(0);
Element id = (Element)entry.getElementsByTagName("ID").item(0);
String english = eng.getFirstChild().getNodeValue();
String bulgarian = bul.getFirstChild().getNodeValue();
int wordId = Integer.parseInt(id.getFirstChild().getNodeValue());
Word word = new Word(bulgarian, english, wordId);
addNewWord(word);
} catch (ParserConfigurationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SAXException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}wordListView.setOnItemClickListener(new OnItemClickListener(){
public void onItemClick(AdapterView<?> parent, View view, int pos, long id) {
selectedWord = words.get(pos);
showDialog(TRANS_DIALOG);
myEditText.setText(selectedWord.getEnglish());
myEditText.addTextChangedListener(new TextWatcher(){
public void onTextChanged(CharSequence s, int start, int before, int count) {
@Override
public void afterTextChanged(Editable s) {
// TODO Auto-generated method stub
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
// TODO Auto-generated method stub
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Sep 21, 2009
When i ran my old application in 1.6 i noticed that the progress bar was not showing up on the screen.When i analyzed it further i found the issue.The progress bar is getting activated but its not visible since my background color is also white.When i changed the background color i was able to see the progress bar.Is there no other way to make the progress bar visible other than changing the background color..Shouldn't the progress bar be visible under all background colors??
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Jul 17, 2010
I am working in an android application that uses a list view. I currently have a XML for the row layout with only one text view. Based on certain conditions, some rows will have one additional button and some other rows may have 2 additional buttons. Can I override the getView method of the adapter class to do this logic? is there any performance issue?
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Mar 3, 2010
When I connet device to DDMS sdk tool, I can see the running process.But I don't think that those process are tatal processes.For example, I have 10 android applications, A, B, C, D, E, F, G, H, I and J.If I want to run only A, B, C application on the power-on, how can I do that.?Where can I make a list for processes running in the poweron time.?
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May 21, 2009
I am new to Android I've a List View. I want to auto scroll all the items of list view on button click event with some specified time interval, and also wants to update the Text View according to selected items. I tried something like this on button click.
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Aug 31, 2010
I need to make a list view as shown in the sample pic for my android app. How to do it? Also I need to add image along it as seen in the sample pic. and link it to another view to show some more details.please check links shown below.
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Oct 6, 2010
I am trying to see if someone can help me with a simple list view I am tying to make. I am specifically facing problem trying to introduce a new column in this list view. Label 3 in xml code below is the new column I m trying to make. Should I have a new linear layout and wrap two text views in it or is there some other option? code...
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Jan 4, 2010
I have an Android ListView created with a SimpleAdapter that has more items in it than fit in the screen. After the list has been scrolled, I need to get the position in the data model of the first visible item in the list.Basically I want a function like: listView.getChildAt(0).getPositionInDataModel().Adapter has a few functions in it, like getItemId(position) that looked useful; however, the SimpleAdapter implementation just returns the passed in position, not a row id like I'd hoped.A brute force solution would be to get the View at index 0, and compare it to the view for each item in the adapter.However, there doesn't seem to be an easy way to get the view for a particular position from the adapter.
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