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Showing only one parameter of custom object in dropdown menu using AutoCompleteTextView

I want to show only one parameter from object(s) found using AutoCompleteTextView. I have list of custom items and I'm using this list in ArrayAdapter which is used in my AutoCompleteTextView. But as I find item by typing something to AutoCompleteTextView, only object as whole is shown (Object type and some identifier), but I want to show just Objects attribute "name" which is a String.

The way i'd go about this is making a separate arraylist with all the names inside of it. Display that and get the user to chose from there, once they have use the index to find the object in the other list.

Initiate new string array
String[] data = new String[1]); // terms is a List<String>
for(int i=0;i<=1;i++){ //only the 1st position of ur data getting inserted
data[0]=s.get(i).toString();
}
ArrayAdapter<?> adapter = new ArrayAdapter<Object>(activity, android.R.layout.simple_dropdown_item_1line, data);
keywordField.setAdapter(adapter); // keywordField is a AutoCompleteTextView

How to implement AutoCompleteTextView using Search Dialog

I want to populate my quick search box using a web service. I have a web service in place which pulls the search data from a web server to put into a string array. I want the show that list of data as the user types into the search dialog. I believe the default search dialog is a simple EditText. How do I make it an`AutoCompleteTextView to and populate that with the string array containing my data?

First you have to parse the data from the webservice, then store the Values/data in a String
Example: CricketTeams
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_dropdown_item_1line, CricketTeams);
AutoCompleteTextView textView = (AutoCompleteTextView)
findViewById(R.id.countries_list);
textView.setAdapter(adapter);
} }
where Cricket teams will be having the data from your web service.
More detailed Example Here

Create empty Spinner

How can I create an empty spinner with no elements in it and add them later?
ArrayAdapter<String> aSpin = ArrayAdapter.createFromResource(this, null , null);
Doesnt work.

I'm curious, in which scenario would you want an empty spinner?
anyway, a spinner with a null object will give you an annoying exception. If you really want a spinner "empty", i would recommend you to create a normal spinner with a fake object. That object would be a string like " ". So, it won't be empty but it will look like if it is.
-- Edit --
In order to use a spinner with objects, you will need an adapter. So, first, if you want an empty spinner, just find its view from your layout and that's all. You will have an empty spinner:
mSpinner = (Spinner)findViewById(R.mLayout.mSpinnerID);
Then, when you need to add your items to the spinner, create an array with those items, then add them to the adapter, and add the adapter to your spinner. For example, let's say that you will have strings:
ArrayList<String> mList = new ArrayList<String>();
mList.add("item 1");
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, mList);
mList.setAdapter(adapter);

An Adapter is something different than a Spinner. If you want to create an empty Spinner, just define one in your layout file or create one programmatically. It will not contain any items if you don't set an Adapter on the Spinner (or specify static entries in the xml declaration).
You might want to take a look at the Spinner tutorial.

How to show Spinner selected Item first in Android

In my application i have one spinner with data Cart,Trolley,Lorry,Truck etc..
in a button click i am saving spinner selected item and other items in the data base.
Now in another button click i want to display all saved data,so in that i want to display previously saved spinner item first instead of default one.
How can i achieve this,please anyone suggest me
Ex:in spinner 1,2,3,4 displayed now if i select 3 and saved in data base now this time i want to show spinner data as 3,4,1,2.

It's much simple by getting index of spinner from DB and set the currently selected index on spinner item,for example if the spinner position stored in DB
then set it as
spinner.setSelection(2);// Note : Position starts from 0,1,2,3 on array

You can change spinner content as below
String[] items = new String[] {"3","4", "1","2"};
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item, items);
spinner2.setAdapter(adapter);

So I understand you correctly, you want to reorder the spinner items based on the user's previous selection? You just have to update the Adapter that you assigned to the spinner in that case.
I guess you wired up a simple ArrayAdapter in this case, so a basic solution would be to modify the order of the strings contained in that adapter, after selection.

ArrayList listArray = new ArrayList();
listArray.add("one");
listArray.add("two");
listArray.add("three");
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item, listArray.toArray(strArray););
spinner2.setAdapter(adapter);
here took items as ArrayList and when user click on any item , break that arraylist in two part start to that point and point to last. then take one temp arraylist and add second part then first part so in that one .
and again call
adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item, listArray.toArray(strArray););
spinner2.setAdapter(adapter);

auto search in listview

I created a list view which extends ListActivity and I have a search field at the top of the page
but I don't know how to write it , I want a search like search contact (type just only 1 char and listview will change, don't have to press any button)
please give me some example code
thanks

I think you should see this

If you are currently using a CursorAdapter to display the List, than you can create a custom CursorAdapter which does filtering automatically as you type keys. The following webpage provides an excellent example of this: http://thinkandroid.wordpress.com/2010/01/11/custom-cursoradapters/
Good luck!

Create a AutoCompleteTextView in your Layout,then put this in your class file,
AutoCompleteTextView txtPhoneNo = (AutoCompleteTextView) findViewById(R.id.txtPhoneNo);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,android.R.layout.simple_dropdown_item_1line, name_Val);
txtPhoneNo.setAdapter(adapter);
where name_Val is the String Array that contains "DATA"