Develop Reference

To set the positions of items in spinner

I am populating my spinner from database. I have a collection of mobile brands. I have added "Add a new brand" also... But when I am setting the spinner items from DB, it comes in somewhere middle.. I want it to go at the end.. Can i do it? if yes, how? please help, thanks in advance.
Spinner brand;
brand=(Spinner)findViewById(R.id.spinner_brand);
private void loadSpinnerData() {
// database handler
DatabaseHandler db = new DatabaseHandler(getApplicationContext());
// Spinner Drop down elements
List<String> Brand = db.getBrands();
// Creating adapter for spinner
ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item, Brand);
// Drop down layout style - list view with radio button
dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
// attaching data adapter to spinner
brand.setAdapter(dataAdapter);
}

Add time column in your brand table and on querying sort by time. So, you will get last added item at last in spinner.

Create an ArrayList and add all your database items to it. and then add your "Choose a brand" string to it. and then pass the ArrayList to Spinner.
Although I should warn you, you are "probably" doing it wrong. If you add "Choose a brand" item to spinner, it will also be selectable, which you might not want :)

Null pointer exception while dealing with spinners

I am getting a null pointer exception when i am running this peice of code
private void loadSpinnerData() {
// database handler
AttendAppDatasource db = new AttendAppDatasource(getApplicationContext());
// Spinner Drop down elements
List<String> clas = db.viewCol(AttendAppDbOpenHelper.COLUMN_CLASS);
Log.i("Select Class","List Assigned");
// Creating adapter for spinner
ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item, clas);
// Drop down layout style - list view with radio button
dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
// attaching data adapter to spinner
spinner.setAdapter(dataAdapter);
}
this is the relevant log output
this is the log out put corresponding to the list

Your spinner is set to null. You need to get it from your resources
Spinner spinner = (Spinner) findViewById(R.id.'spinner_id_name');
Then you can set your adapter :)

Populating an Android Spinner from an SQLite but with two fields?

I've finally managed to populate a spinner from an sqlite db after much messing about with this code however it's only using one field and I want First and Last names on the same spinner item?
The code is as follows:
private void fillSpinner() {
Cursor c = myDbHelper.FetchDrivers();
startManagingCursor(c);
// create an array to specify which fields we want to display
String[] from = new String[]{"FirstName"};
// create an array of the display item we want to bind our data to
int[] to = new int[]{android.R.id.text1};
// create simple cursor adapter
SimpleCursorAdapter adapter =
new SimpleCursorAdapter(this, android.R.layout.simple_spinner_item, c, from, to );
adapter.setDropDownViewResource( android.R.layout.simple_spinner_dropdown_item );
// get reference to our spinner
Spinner s = (Spinner) findViewById( R.id.spr_Driver1);
s.setAdapter(adapter);
}
Now it displays the FirstName and I've tried added "FirstName", "LastName" but it doesn't do anything different, I ideally want it to display the name in full on each spinner item. Is this even possible?
Any help would be great!
Thanks,
Chris

For this, you need to change the android.R.layout.simple_spinner_item and android.R.layout.simple_spinner_dropdown_item, as these layout items are able to display only one item in the dropdown list and on the spinner.
For your purpose, the best way is to create your own layout that has two items.
Here is a link about how to do it.

How do I set spinner value to string

I have a spinner set up like this:
ArrayAdapter<String> states = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_dropdown_item, getResources().getStringArray(R.array.stateabbrev));
states.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
state.setAdapter(states);
As you can see, the source is an array.xml file.
I want to know how to populate it if I know the array value. For instance, I am retrieving information from my database and the user is from "KY" so I have a string "KY" and I want the spinner selection to be on "KY"

at first we should get position of "KY"
int position = states.getPosition("KY");
after that, select in spinner with position
state.setSelection(position);

Change items of a Spinner on item click of another Spinner in android

I have a question that, I want to load items in a spinner on ItemClick of another Spinner. Actually I two spinners, data is loaded into first spinner from json_parsing and I have to load data in second Spinner after selecting an item from first spinner, So, I don't know how it will implemented? Please suggest me the right solution.
Thanks in advance.

You can do it like this,
First time you data will be loaded in First and Second Spinner.
On Selection of item from First Spinner do this.
1.) Clear the previous ArrayList or Array whateven you have passed the
Second Spinner.
2.) Fill the ArrayList or Array of new data & Update the Second Spinnner using
adapter.notifyDataSetChanged();
second_spinner.setSelection(0);

First Set an OnItemClickListner for your First Spinner. In the OnItemClickListner Method first parse your XML. After completing XML parsing, set parsed data to the adapter and set that adapter with your second spinner

Set an OnItemClickListener on your first spinner that would prepare and set the adapter to the second spinner.

Here is a more complete code example:
Spinner spinner1 = (Spinner) findViewById(R.id.spinner1);
Cursor c1 = (some code for getting a cursor from an data source, for example, a sqlite database)
SimpleCursorAdapter adapter1 = new SimpleCursorAdapter(this, android.R.layout.simple_spinner_item, c1, new String[]{"column_name"}, new int[]{android.R.id.text1});
spinner1.setAdapter(adapter1);
Spinner spinner2 = (Spinner) findViewById(R.id.spinner2);
Cursor c2 = (some code for getting a cursor from an data source, for example, a sqlite database)
SimpleCursorAdapter adapter2 = new SimpleCursorAdapter(this, android.R.layout.simple_spinner_item, c2, new String[]{"column_name"}, new int[]{android.R.id.text1});
spinner2.setAdapter(adapter2);
spinner1.setOnItemSelectedListener(new OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
Cursor c_new = (create a new cursor);
adapter2.changeCursor(c_new);
adapter2.notifyDataSetChanged(); // this is important for notifying the UI
spinner2.setAdapter(adapter2);
}
});
What you do is set a listener to the first Spinner, there change the Cursor of the second Adapter to a new one, notify the UI and reset the Adapter of the second Spinner.