Develop Reference

Add new items on top of list view

Because android automatically moves new items to the bottom of list view I want that to be reversed. In any case my condition is met, I want to add new items on top of list view.
I have seen this post here but I don't know how to add that to my code, here it is:
if(condition){
listView = (ListView) findViewById(R.id.ListView1);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(
this, R.layout.list_b_text, R.id.list_content, ArrayofName);
listView.setAdapter(adapter);
}

Just simply add every item at position 0 of your ArrayList so when you call listView.notifyDataSetChanged(); it will show latest items on top.
for (Object obj : objectList) {
ArrayofName.add (0, obj); // this adds new items at top of ArrayList
}
objectList is basically an ArrayList or List of Object or String (whatever is your case). If you want to add items one by one, remove for loop. This loop actually iterates every item of objectList and adds it in your ArrayList at top position.

Remove items from listview on its ItemClickListener

I am using a collection of ArrayList to fill my Listview. My ListView contains two separate rows types.
Header and Footer.
I am trying to achieve the ExpandableListView Functionality on my Listview from which I am trying to remove some items on click of header till next header.
I am using this function to loop through items and removing items
private void removeItems(int value)
{ Log.e(Constant.LOG, items.size()+"");
for (int i = value;i < items.size(); i++) {
if(!items.get(i).isSection())
items.remove(i);
}
Log.e(Constant.LOG, items.size()+"");
adapter = new EntryAdapter(this, items, this);
mListView.setAdapter(adapter);
}
QUESTION IS : I am not able to remove all items from the list in one shot, some stays there !
I have tried looping through adapter.count(); but no luck
My List :
SECTION 1
ITEM 1
ITEM 2
Item N
Section 2
But when I click on Section 1 not all ITEMS get deleted in one shot WHY!
I am not able to use Expandable Listview at this stage because activity contains many more complex functionality on List. Please help me where I am going wrong!

Create a new ArrayList<Collection> , Then add your item in it and then use removeAll(collection).
TRY THIS:
private void removeItems(int value)
{ Log.e(Constant.LOG, items.size()+"");
ArrayList<Collection> deleteItems= new ArrayList<Collection>();
for (int i = value;i < items.size(); i++) {
if(!items.get(i).isSection())
deleteItems.add(items.get(i));
}
items.removeAll(deleteItems);
Log.e(Constant.LOG, items.size()+"");
adapter = new EntryAdapter(this, items, this);
mListView.setAdapter(adapter);
}
EDIT
Every time you are deleting an item, you are changing the index of the elements inside .
e.g : let suppose you are deleting list1 , then list[2] becomes list1 and hence your code will skip list1 next time because now your counter would be moved to 2.
Here are other ways by which you can achieve this also,
Removing item while iterating it

So what exactly I did now. Instead of looping through items again I did like this :
I created another list and parallely populate it with the main array.
items.add(user);
// after populating items did this
newItems.addAll(items); // same collection ArrayList
and finally I can play with the main array by using removeAll and addAll methods.
items.removeAll(newItems); // remove items
items.addAll(afterPosition,newItems); // add items after position

Multiselection Listview

I am new in Android development. I have MultiselectionListview in my app.I want to delete all the items selected, But for it i have to call a function from Sqlite Db.I have to pass selected item positions in the form of array. I am getting position as follows :
SparseBooleanArray checked = lv_del.getCheckedItemPositions();
for (int i= 0; i<=checked.size();i++)
{
int[] posArr = new int[checked.size()];
// Item position in adapter
int position = checked.keyAt(i);
if(checked.valueAt(i))
{
posArr [i] = (int) adapter.getItemId(position);
}
}
}
but its not working, how can i pass selected items positions via array ??
any help will be appreciated.

You can use an additional button outside the listview as an ok button.And write the code for creating the list of items using position array and call the delete function with that list in the listener of ok button.

spinner with no select option

I'm trying to create spinner which should not have any select but instead of it, it should show Blank, after clicking that items can be selected.
Here is my code, please help.
urineGlucoseSpinner = (Spinner) view.findViewById(R.id.spnner_urine_glucose);
ArrayList<String> ugList = new ArrayList<String>();
ugList.add(0,"");
ugList.add("1.5");
ugList.add("5.5");
ugList.add("0.8");
ugList.add("9.5");
ugList.add("12.0");
//ArrayAdapter<String> urineGlucoseAdapter = new ArrayAdapter<String>(getActivity(),android.R.layout.simple_spinner_item, ugList);
ArrayAdapter<String> urineGlucoseAdapter = new ArrayAdapter<String>(getActivity(),R.layout.custom_spinner_text, ugList);
urineGlucoseAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
urineGlucoseSpinner.setAdapter(urineGlucoseAdapter);
urineGlucoseSpinner.setSelection(0);
urineGlucoseSpinner.setOnItemSelectedListener(new OnUGItemSelected());

By default spinner takes array 0th element if u not selecting any one..u have to make object of ArrayList and for 0th element u have to put "" (null Sting) inside semicolon and make it as 0th element...i think this is the only solution for your question..
ArrayList<String> ugList = new ArrayList<String>();
ugList.add("");

I can see two ways to do this.
1) Add the blank line to your data at position 0, and then create a custom spinner adapter and override the getView method and in it use an if to set the 0 position view to GONE (thus getting rid of the blank line in the listing).
2) An alternative might be setting an empty EditText in your form, and when it gains focus pop a listview in a dialog with your possible choices.

How to get the new value to the top position of the listview

How to get the new value to the top poistion of the listview when I entered the digit in a edittext.
Am getting the new value, which is given in the edittext,adding to the last position of the listview.
But I want the new value must be added to the top position of the listview.
Please can anyone help me in doing so?

If you are using ArrayList<String> arrayList = new ArrayList<String>(); then you can add the data to ArrayList at the 0 index and call notifyDataSetChanged(); to re-populate your ListView.
arrayList.add(0, "First");

just Reverse Your For Loop from size of ArrayList to 0.
Like This following Code ...
int j = ArrayList.size();
for (int i =j-1; i >= 0; i--)

You might want to add a button to the View containing the EditText and then when the user clicks that button get the value of the EditText and add it to the ListAdapter.
button.setOnClickListener(new OnClickListener(){
//Get the data from the edittext
String s = editText.getText().toString();
//Add it to your adapter
adapter.add(s);
//Refresh the adapter
adapter.notifyDataSetChanged()
});
Here are some links you might want to check out:
ArrayAdapter
EditText