I created a Data-Base table student which contains two fields like student_id and student_name. This table contains some data for student.
My actual problem is I want to set ID and name of student in spinner like in html select tag, so when select spinner item I must get this ID to get another data from database.
You can have two arraylist for name and id;
List<String> sIds = new ArrayList<String>();//add ids in this list
List<String> names = new ArrayList<String>();//add names in this list
Then you can retrive here inside spinner select. It will work even if two names are same in the spinner which may be the case:
spinner.setOnItemSelectedListener(new OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id) {
int id = sIds.get(position);//This will be the student id.
}
#Override
public void onNothingSelected(AdapterView<?> parentView) {
// your code here
}
});
To add values into Spinner you can do it something like this Test
public class Test extends Activity
{
ArrayList<String> InfoStudent = new ArrayList<String>();
ArrayList<String> IdStudent = new ArrayList<String>();
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Spinner spinner = (Spinner) findViewById(R.id.spinner1);
//Here you'll have to make a query to get ID and Name then with
InfoStudent.add("TheID" + "InfoStudentReturnedByQuery");
//TheID should go in IdStudent ArrayAdapter and InfoStudentReturnedByQuery should go in InfoStudent ArrayAdapter
// Then you create the arrayAdapter
ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(Test.this
,android.R.layout.simple_spinner_item,difficultyLevelList);
// Set the Adapter
spinner.setAdapter(arrayAdapter);
If you want to know what spinner is selected you should do something like this :
spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> adapterView,
View view, int i, long l) {
// TODO Auto-generated method stub
Toast.makeText(MainActivity.this,"You Selected : "
+ TheMainAdapterOfStudents.get(i)+" Student ",Toast.LENGTH_SHORT).show();
}
This only it's a guide how to, hope it helps :)
1. Declare type Like:
public class Item
{
public long id;
public String name;
}
2. Fill spinner with data (Item[]):
Item[] data = new Item[3];
data[0] = new Item(1, "Item 0");
data[1] = new Item(2, "Item 1");
data[2] = new Item(3, "Item 2");
ArrayAdapter<Item> dataAdapter = new ArrayAdapter<Item>(this,android.R.layout.simple_spinner_item, data);
dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(dataAdapter);
3. Get your id where you need it:
Item item = (Item)spinner.getSelectedItem();
return item.id;
Assuming I am reading your list correctly, if you want to set an Id to your Spinner programically just use..
mSpinner.setId(int)
In this code replace mSpinner with the reference to your Spinner and int with the desired Id
Related
Please tell me how can I hide the item at index 0 from the dropdown in the spinner in Android Studio? I am using this code, it works, but when I open the list, it shows at the bottom. That is, it is focused on the elements below. what do i need to change?
SpinnerName = (Spinner) v.findViewById(R.id.spinner1);
ArrayList<String> names = new ArrayList<>();
names.add(0, "SELECT");
names.add(1, "Name1");
names.add(2, "Name2");
final int listsize = names.size()-1;
ArrayAdapter<String> adapter = new ArrayAdapter<String>(getContext(), android.R.layout.simple_spinner_item, names){
#Override
public int getCount() {
return(listsize);
}
};
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
SpinnerName.setAdapter(adapter);
adapter.setDropDownViewResource(R.layout.spinner_list);
SpinnerName.setSelection(listsize);
SpinnerName.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parent, View view, int pos,
long id) {
....
}
#Override
public void onNothingSelected(AdapterView<?> arg0) {
}
});
SpinnerName.setSelection(listsize);
your problem is here! you are passing the total list size number and
that where you are doing wrong, because setSelection method use to
show default index of spinner.
you can simply do that SpinnerName.setSelection(1); that would give you the fist spinner item unless showing the names.add(0, "SELECT"); item
I want to change the value of the second spinner when the value of the first spinner is changed I tried the solutions but did not get an exact solution so anyone have a solution for that so please suggest or any question then please ask
ArrayAdapter<String> deptArrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, getResources().getStringArray(R.array.Province));
deptArrayAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinnerProvinceEyeTest.setAdapter(deptArrayAdapter);
deptArrayAdapter.notifyDataSetChanged();
Set a OnItemSelectedListener() first.
spinnerProvinceEyeTest.setOnItemSelectedListener(new OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> parent, View view, int position, long id)
{
String selectedItem = parent.getItemAtPosition(position).toString(); //this is your selected item
}
public void onNothingSelected(AdapterView<?> parent)
{
}
});
In onItemSelected() of above Listener, place your condition and set resource for second Spinner as:
If(selectedItem == "YourText"){
//Here, you're initalizing the second `Spinner`
ArrayAdapter<String> secondArrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, getResources().getStringArray(R.array.YourList));
secondArrayAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
secondSpinner.setAdapter(secondArrayAdapter);
}
else{
//Use any other list with arrayAdapter in case of other item selected.
//Use can use If-else-if or Switch to select different resource for different item of first spinner
}
Reference - Official Documentations.
How to insert the values of spinner to SQL lite database in android?
for instance my code has
ArrayList<String> yr = new ArrayList<String>();
for (int i = 2015; i <= 2030; i++) {
yr.add(Integer.toString(i));
}
ArrayAdapter<String> adapter1 = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, yr);
adapter1.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
year.setAdapter(adapter1);
and i want to save the year selected by the user on the database
Implement OnItemSelectedListener for your class then call setOnItemSelectedListener for the spinner.
spinner.setOnItemSelectedListener(this);
Then add the following which gets invoked after year is selected in the dropdown:
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
String item = parent.getItemAtPosition(position).toString();
//insert item to db
}
May be this will work
public void insertValuesInDb(ArrayAdapter adapter) {
for(int i = 0; i < adapter.size(); i++) {
item = adapter.getItem(i)
//insert item in database
}
}
If it helps you then don't forget to mark answer as accepted and if you have any further queries you can ask them in comments!
I'm having a difficulty in spinner android, more specifically in the data saving part.
First, I'm going to tell you what is the purpose behind the code below.
I want to create a spinner that user can choose which planet to buy, then when he/she hits the submit button, a toast will appear saying "You wanted to buy: ...." then followed by a purchase summary like username & price.
However, in the middle of the process I'm having a hard time to save the id of each spinner's element.
Every time I chose "Earth" (id= 1) & hit submit, the toast will always refer back to "Mars" which has id = 0. So it seems that the problem is my submit button will always reset the chosen id.
I intentionally set planetSpinner() method to return int, thus I could always track down the "id" being returned. But again, the submit button would always make it shows to id = 0.
Can anyone help me? I would really appreciate that. Thank you.
Spinner Code (MainActivity.java)
public int planetSpinner(){
context = this;
List<String> categories = new ArrayList<String>();
categories.add("Mars($12 billions)"); //0
categories.add("Earth ($99 billions)"); //1
categories.add("Jupiter ($13 billions)"); //2
cSpinner = (Spinner) findViewById(R.id.coffee_spinner);
ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, categories);
dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
cSpinner.setAdapter(dataAdapter);
cSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
Toast.makeText(MainActivity.this, "You selected: " + cSpinner.getItemAtPosition(position), Toast.LENGTH_LONG).show();
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
Toast.makeText(MainActivity.this, "Nothing selected", Toast.LENGTH_LONG).show();
}
});
return cSpinner.getSelectedItemPosition();
}
Submit Purchase Code (MainActivity.java)
public void submitOrder(View view){
Toast.makeText(MainActivity.this, "You wanted to buy: " + planetSpinner(), Toast.LENGTH_LONG).show();
displayMessage(confirmationOrder(userName, price));
}
public class MySpinner extends Activity implements OnItemSelectedListener{
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Spinner spinner = (Spinner) findViewById(R.id.coffee_spinner);
spinner.setOnItemSelectedListener(this);
List<String> categories = new ArrayList<String>();
categories.add("Mars($12 billions)"); //0
categories.add("Earth ($99 billions)"); //1
categories.add("Jupiter ($13 billions)"); //2
ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, categories);
// 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);
}
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
// On selecting a spinner item
String item = parent.getItemAtPosition(position).toString();
// Showing selected spinner item
Toast.makeText(parent.getContext(), "Selected: " + item, Toast.LENGTH_LONG).show();
}
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
}
Have you try this:
Toast.makeText(MainActivity.this, "You selected: " + categories.get(position), Toast.LENGTH_LONG).show();
It is because the spinner was reinitialized everytime you call the function. Thus, the selected value was the first item, that is why your function always returns 0. Hope that helps.
Hi I have a spinner (spinner1) and when the user selects an item from it (example: "Canada" I want the spinner2 to populate with Provinces of "canada". I have tried the following but it doesnt work. I tried to do this by using:
if (spinner1.getSelectedItem().toString().equals("Canada"))
{
addItemsOnSpinner2();
}
public void addItemsOnSpinner2() {
spinner2 = (Spinner) findViewById(R.id.spinner2);
List list = new ArrayList();
list.add("Item 1");
list.add("Item 2");
list.add("Item 3");
list.add("Item 4");
ArrayAdapter dataAdapter = new ArrayAdapter(this,android.R.layout.simple_spinner_item, list);
dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner2.setAdapter(dataAdapter);
}
for some reason the items aren't being added to spinner2. please help
This code
if (spinner1.getSelectedItem().toString().equals("Canada"))
{
addItemsOnSpinner2();
}
will only run the first time the Activity is created since it is in your onCreate(). You need to add this code to your onItemSelected() for spinner1. So you first need to implement an OnItemSelected listener to that spinner.
spinner1.setOnItemSelected(new OnItemSelected()
{
#Override
public void onItemSelected(AdapterView<?> parent, View v, int position,
long id)
{
TextView tv = (TextView)v; // cast the View to a TextView
if ("Canada".equals(tv.getText().toString())
{
addItemsOnSpinner2();
}
}
#Override
public void onNothingSelected(AdapterView<?> arg0) {
}
});
Something like this should work. Although, you will probably be safer to use position instead of getting the text.
OnItemSelected Docs