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disable item in listview android java

Im trying disable some items in listview , but cant to do it.
I have Array of booleans
private boolean[] array; //10 items all false, and some of them true
in code im trying
for(int i=0;i<array.length();i++){
if(!array[i]){
listview.getChildAt(i).setEnabled(false);
}
}
but im always got nullpointerexception on string "listview.getChildAt()"
if write like
if(listview.getChildAt(i)!=null){ //do code here }
than i see what no entrance to string "getChildAt(i).setEnabled(false)"
im little not understand about getChildAt but i was thinking its way where i can get items by position. Any one can help me how to do it?
adapter for list view
public class LevelAdapter extends ArrayAdapter<String> {
public LevelAdapter(Activity context, ArrayList<String> le, ArrayList<Integer> co, boolean[] bools) {
super(context, R.layout.listviewitem, le);
this.context = context;
this.l = le;
this.s = co;
this.boolStates = bools;
}
#Override
public View getView(final int position, View view, ViewGroup parent) {
LayoutInflater inflater = context.getLayoutInflater();
View rowView= inflater.inflate(R.layout.listviewitem, null, true);
tvL = (TextView) rowView.findViewById(R.id.l);
tvC = (TextView) rowView.findViewById(R.id.s);
tvL.setText(""+l.get(position));
tvCt.setText(""+s.get(position) + "/3");
return rowView;
}
}
regards , Peter.
SOLUTION
in adapter check
if(lvl[position]==false){
rowView= inflater.inflate(R.layout.listviewitemdisabled, null, true);
rowView.setEnabled(false);
}else
{
rowView= inflater.inflate(R.layout.listviewitem, null, true);
}
and when click on
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
if (view.isEnabled()) {
// do our code here
thanks for this easy solution

You can set enabled state in your adapter.
rowView.setEnabled(false)

Use Adapter approach.
Create an adapter and a viewHolder and in OnBind method just get that item of list and disable it.
send value to the adapter using method and notify the adapter about change.

Trouble with populating listview

I am trying to populate a listview with custom made objects. I am using an
adapter to use the listview class. The following is the code I use to use the adapter.
adapter = new SearchListAdapter(this, values);
expListView = (ListView) findViewById(R.id.SearchList);
setListAdapter(adapter);
In the SearchListAdapter class I have the following code:
public class SearchListAdapter extends ArrayAdapter<String>
{
private Context context;
private ArrayList<String> values;
public SearchListAdapter(Context context, ArrayList<String> UsernameValues) {
super(context, R.layout.search_contact, UsernameValues);
this.context = context;
this.values = UsernameValues;
}
#Override
public View getView(int position, View convertView, ViewGroup parent)
{
LayoutInflater inflater = (LayoutInflater) this.context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View rowView = inflater.inflate(R.layout.search_contact, parent, false);
TextView textView = (TextView) rowView.findViewById(R.id.firstLine);
for(String Index : values)
{
textView.setText(Index);
}
return rowView;
}
}
I can see that the setListAdapter is working (I assume), as it is passing the information into the SearchListAdapter, but when the getView tries to populate the list, it just enters the last String value from the ArrayList in every single element in the list. What am I missing to make it so every single element corresponds to a value in the ArrayList? Any help is appreciated, thanks.

Your code
for(String Index : values)
{
textView.setText(Index);
}
is actually iterating over your complete data List and setting each value at every iteration. So, after the last iteration, every textView is left with the last value in your adapter's backing List.
What you need is to only set that value that corresponds to the current row position of your ListView in your UsernameValues list.
textView.setText(values.get(position));

Set list view height without TextView with adapter

I have a ListView which is supposed to become a menu with two drawables and two text views per row.
Activity Code:
ArrayList<MenuItem> itemArray = new ArrayList<MenuItem>();
itemArray.add(new MenuItem("Headertexxt", "subbtexdt"));
itemArray.add(new MenuItem("asf", "asf"));
ListView listView = (ListView) findViewById(R.id.listViewCM);
String[] array = getResources().getStringArray(R.array.buttonsCM);
int[] images = new int[] { R.drawable.btn_car, R.drawable.btn_star, R.drawable.btn_bag};
listView.setAdapter(new HomeScreenButtonsAdapterSubtext(this, R.layout.row,
itemArray, images, R.drawable.list_arrow));
Utils.setListViewHeightBasedOnChildren(listView);
listView.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
switch (position) {
case 0:
findViewById(R.id.buttonCreditCompilation).performClick();
break;
case 1:
findViewById(R.id.buttonYourCredits).performClick();
break;
}
}
});
Adapter code:
public class HomeScreenButtonsAdapterSubtext extends ArrayAdapter<MenuItem> {
private Drawable[] drawables;
private Drawable arrowDrawable;
private ArrayList<MenuItem> items;
public HomeScreenButtonsAdapterSubtext(Context context, int resourceId,
ArrayList<MenuItem> items, int[] images, int arrowImage) {
super(context, resourceId, items);
this.items = items;
Resources resources = context.getResources();
if (images != null) {
drawables = new Drawable[images.length];
int i = 0;
for (int id : images) {
Drawable drawable = resources.getDrawable(id);
drawable.setBounds(0, 0, drawable.getIntrinsicWidth(),
drawable.getIntrinsicHeight());
drawables[i++] = drawable;
}
}
arrowDrawable = resources.getDrawable(arrowImage);
arrowDrawable.setBounds(0, 0, arrowDrawable.getIntrinsicWidth(),
arrowDrawable.getIntrinsicHeight());
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View v = super.getView(position, convertView, parent);
if (v instanceof TextView) {
Drawable dr = drawables != null ? drawables[position %
drawables.length] : null;
((TextView) v).setCompoundDrawables(dr, null, arrowDrawable, null);
Utils.setFont((TextView) v);
}
// View v = convertView;
if (v == null) {
LayoutInflater vi = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = vi.inflate(R.layout.row, null);
}
MenuItem station = items.get(position);
if (station != null) {
TextView tt = (TextView) v.findViewById(R.id.headerText);
TextView bt = (TextView) v.findViewById(R.id.subText);
if (tt != null) {
tt.setText(station.getHeaderText());
}
if (bt != null) {
bt.setText(station.getSubText());
}
}
return v;
}
The problem I have right now is that I can't set the listview height based on the children. I'm trying to do that here: Utils.setListViewHeightBasedOnChildren(listView); but getting the error: arrayadapter requires the resource id to be a textview at this row. Does anyone know a solution for this?
Can I use some other method for setting the ListView height?
Thanks

but getting the error: arrayadapter requires the resource id to be a
textview at this row.
R.layout.row is a layout file which it doesn't have just a TextView. If you call the super constructor you have used and you also call the super.getView(in the getView method) method in the adapter, then ArrayAdapter will complain as it expects a single widget in the layout file passed to it(a single TextView).
I don't understand why you have that piece of code in the getView method(with the super call) when you know precisely that the row can't be an instance of Textview .
I'm not sure about setting the height of the ListView either, if you're trying to show all the rows of the ListView, don't do it(as you make the ListView basically useless). If you still want to do this, then it's better to lose the ListView and build the row layouts manually.

In fact it does not really make sense to set the height of ListView depending on its content.
Because the whole point of a ListView is to make its content scrollable (however big it is)...so it is supposed to have a fixed height.

Custom ArrayAdapter not displaying results

This one has me quite stumped. I'm sure it is just something simple I am missing, but I cant seem to find out what...
When I run the program, it opens up the dialog box and displays the AutoCompleteTextView I have initialized. When I try to type something into it, nothing drops down or is displayed other than the text I type in. I have created a similar system in another part of my program with the same mechanics, but using a regular ArrayAdapter and it works fine so the interface is not the problem.
Here is where I initialize my custom ArrayList. I have been trying to use just strings to make it simpler.
final Dialog weaponDialog = new Dialog(BattleScreen.this);
weaponDialog.setContentView(R.layout.weapon_selection_dialog);
weaponDialog.setTitle("Add a Weapon");
weaponDialog.setCancelable(true);
String[] weaponStringArrayList = ConstantEquipmentHelper.getCondensedWeaponString();
WeaponArrayAdapter weaponAdapter = new WeaponArrayAdapter(this, R.layout.weapon_list_item, weaponStringArrayList);
weaponDialogAcTextView = (AutoCompleteTextView) weaponDialog.findViewById(R.id.weaponSelectionAutoCompleteTxt);
weaponDialogAddButton = (Button) weaponDialog.findViewById(R.id.weaponSelectionAddButton);
weaponDialogWeaponInfo = (TextView) weaponDialog.findViewById(R.id.weaponSelectionInformationTxt);
...
...
...
Here is my custom ArrayAdapter Class
public class WeaponArrayAdapter extends ArrayAdapter<String> {
private Context context;
String[] objects;
public WeaponArrayAdapter(Context context, int textViewResourceId, String[] objects) {
super(context, textViewResourceId);
this.objects = objects;
this.context = context;
}
private class WeaponItemHolder {
TextView weaponName;
TextView weaponCat;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
//return super.getView(position, convertView, parent);
final WeaponItemHolder holder;
if (convertView == null) {
//Sets up a new holder to temporaraly hold the listeners that will be assigned to the binded variables
holder = new WeaponItemHolder();
inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.weapon_list_item, null);
//Find the IDs! Find them!!!!
holder.weaponName = (TextView) convertView.findViewById(R.id.weaponListItemName);
holder.weaponCat = (TextView) convertView.findViewById(R.id.weaponListItemCategory);
//"Sets the tag associated with this view. A tag can be used
//to mark a view in its hierarchy and does not have to be unique within the hierarchy."
convertView.setTag(holder);
} else {
holder = (WeaponItemHolder) convertView.getTag();
}
String spellName = objects[position];
String[] weaponInfo = spellName.split("\\:");
weaponInfo[1] = weaponInfo[1].trim();
holder.weaponName.setText(weaponInfo[0]);
holder.weaponCat.setText(weaponInfo[1]);
return convertView;
}
}
Additional Info: I have tried debugging it and it never reaches getView. This makes sense of course, as its not displaying anything.
Thanks,
-Andrew
EDIT: I have found out how to implement the above problem:
I used a SimpleAdapter with a custom layout.
However, now I can not select any of the items... onItemClick is not even called when I try to click it. It probably has to do with using the SimpleAdapter??
LINK: http://lemonbloggywog.wordpress.com/2011/02/15/customer-autocomplete-contacts-android/
ArrayList<Map<String, String>> weaponStringArrayList = ConstantEquipmentHelper.getCondensedWeaponString();
//The adapter that recieves the layout type from android and the array creatd by the above function.
SimpleAdapter simpleAdapter = new SimpleAdapter(this, weaponStringArrayList, R.layout.weapon_list_item ,new String[] {"name", "category"}, new int[] { R.id.weaponListItemName, R.id.weaponListItemCategory});
//Find the view blah blah blah...
weaponDialogAcTextView = (AutoCompleteTextView) weaponDialog.findViewById(R.id.weaponSelectionAutoCompleteTxt);
weaponDialogAddButton = (Button) weaponDialog.findViewById(R.id.weaponSelectionAddButton);
weaponDialogWeaponInfo = (TextView) weaponDialog.findViewById(R.id.weaponSelectionInformationTxt);
//Set that adapter!
weaponDialogAcTextView.setAdapter(simpleAdapter);

You have to implement getCount() and set the count of your data, i.e. objects.length.
You also have to set the adapter to the view using the method setAdapter().
Hope this helps!

Custom SimpleAdapter only shows Sample Text Android

Before making my own SimpleAdapter object because I wanted to change the color of the rows, I was just using new SimpleAdapter(...). Now that I am using my own custom SimpleAdapter, the row color is changing, but my text is not getting updated. I have called adapter.notifyDataSetChanged(), but it is still showing only the sample text- "TextView". As I said, everything was working fine when I didn't create my own adapter. I suspect it might have something to do with the order I am initializing things:
public class AddScreen extends Activity implements OnClickListener,
OnItemClickListener, OnItemLongClickListener {
SimpleAdapter adapter;
List<HashMap<String, String>> painItems = new ArrayList<HashMap<String, String>>();
ListView listthings;
int[] to;
String[] from;
public void onCreate(Bundle savedInstanceState) {
...
listthings = (ListView) findViewById(R.id.listthings);
from = new String[] { "row_1", "row_2" };
to = new int[] { R.id.row1, R.id.row2 };
adapter = new Adapter(this, painItems, R.layout.mylistlayout,
from, to);
listthings.setAdapter(adapter);
...
}
public class Adapter extends SimpleAdapter{
HashMap<String, String> map = new HashMap<String, String>();
public Adapter(Context context, List<? extends Map<String, String>> data,
int resource, String[] from, int[] to) {
super(context, data, resource, from, to);
}
#Override
public View getView(int position, View convertView, ViewGroup parent){
View row = convertView;
if (row == null) {
LayoutInflater mInflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
row = mInflater.inflate(R.layout.mylistlayout, parent, false);
}
row.setBackgroundColor(0xFF0000FF);
TextView rw1 = (TextView)findViewById(R.id.row1);
// TextView rw2 = (TextView)findViewById(R.id.row2);
rw1.setText(map.get(position));
return row;
}
}
// to add the item, put it in the map, and add the map into the list
private void addItem() {
HashMap<String, String> map = new HashMap<String, String>();
map.put("row_1", row1);
map.put("row_2", row2);
map.put("row_3", painLevelString);
map.put("row_4", painLocation);
map.put("row_5", timeOfPainString);
map.put("row_6",textTreatmentString);
painItems.add(map);
adapter.notifyDataSetChanged();
}
EDIT:Added Code
This is how I am getting the data from the intent(onActivityResult()), placed before the addItem Code:
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == 1) {
row1 = data.getStringExtra("com.painLogger.row1");
row2 = data.getStringExtra("com.painLogger.row2");
painLevelString = data.getStringExtra("com.painLogger.painLevel");
painLocation = data.getStringExtra("painLocation");
timeOfPainString = data.getStringExtra("com.painLogger.painTime");
textTreatmentString = data
.getStringExtra("com.painLogger.treatment");
addItem();
}
}
*Also, just in case this is relevant the order of placement is this: onCreate() -> custom Adapter class -> onActivityResult() -> addItem()* **
Here is a screenshot of what it looks like. The two TextView fields in each item should be filled with info(which they were, until I did this).

If it worked previously with just using new SimpleAdapter(...) then in your getView(...) implementation change the first line to this:
View row = super.getView(position, convertView, parent);
And see if that is what you're expecting. Take out the LayoutInflater stuff too.

In getView(), about where you are setting the row background, you should also set the text for the TextView.
Calling notifyDataSetChanged(), doesn't automagically set your texts right, it just causes the ListView to redraw the visible rows with the new data...practically calling getView() for each row that needs a refresh.
I also suggest setting the background color from the mylistlayout.xml file, and if the getView() function starts taking on a few findViewByID's, you should also consider using a "view holder" approach like in this sample: http://developer.android.com/resources/samples/ApiDemos/src/com/example/android/apis/view/List14.html

You need to set the text in getView(). Like this:
public View getView(int position, View convertView, ViewGroup parent){
TextView text;
if (convertView == null) {
LayoutInflater mInflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = mInflater.inflate(R.layout.mylistlayout, parent, false);
text = (TextView) convertView.findViewById(R.id.more_list_text);
}
convertView.setBackgroundColor(0xFF0000FF);
text.setText(map.get(position));
return convertView;
}
Also, and this is VERY important - store you map as a member variable of the SimpleAdapter
ie, put this line at the top of your object definition:
HashMap<String, String> map = new HashMap<String, String>();