Develop Reference

How to fix listview value single string have multiple value for android

String sessionId = getIntent().getStringExtra("numbers");
final String[] values = new String[]{sessionId};
ArrayList list = new ArrayList<>(Arrays.asList(values));
final ArrayList arrayList = new ArrayList();
for (int i = 0; i < values.length; i++)
{
Log.d(TAG, "listValue -" + values[i]);
arrayList.add(values[i]);
}
listView = (ListView)findViewById(R.id.textView2);
listView.setAdapter(new
ArrayAdapter(ListDisplayActivity.this,R.layout.list_display,R.id.text, arrayList));
How to fix listview value single string have multiple values for android?

You can pass values like
intent.putStringArrayListExtra("sessionIds",yourSessionIdList);
and get like
ArrayList<String> sessionIds = getIntent().getStringArrayListExtra("sessionIds");
Check the below link: You may need to use custom adapter to display multiple values in each row of listview:
Listview with custom adapter
And I also recommend you to use recyclerview instead of listview

Data Changed After set Adapter to Spinner

My data always gets size '1' after set to Spinner Adapter. I used SearchableSpinner to show data.
final SearchableSpinner spinnerProvince = selectLocation8v.getSpinnerProvince();
final ArrayList<String> arrayProvince = new ArrayList<>();
final ArrayList<String> arrayKota = new ArrayList<>();
final ArrayList<String> arrayKecamatan = new ArrayList<>();
final ArrayList<State> listProvinsi = lisaDbHelper.getStates();
for (int p = 0; p < listProvinsi.size(); p++) {
arrayProvince.add(listProvinsi.get(p).getName());
}
ArrayAdapter provinceAdapter = new ArrayAdapter<>(getActivity(), android.R.layout.simple_spinner_item, arrayProvince);
provinceAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinnerProvince.setAdapter(provinceAdapter);
System.out.println("Data count before set to adapter : " + provinceAdapter.getCount()); // 34
System.out.println("Data count after set to adapter : " + spinnerProvince.getAdapter().getCount()); // 1

If you want to know how many items are bound to spinner, you should call:
spinnerProvince.getAdapter().getCount()

in your log you trying to get number of item in spinner by spinnerProvince.getCount() but this will not return actual value.
replace this code
System.out.println("Data count after set to adapter : " + spinnerProvince.getCount());
To
System.out.println("Data count after set to adapter : " + spinnerProvince.getAdapter().getCount());
i got the reference from here and i found that there no such method for returning spinner item count.
try to do that
Adapter adapter= (Adapterspinner )listProvinsi.getadapter();
int count = adapter.getCount();
Hope it will help you!!

Using a variable to switch to a certain spinner item

I have:
a String array with an unknown length that's populated with unknown items (let's say fish, bird, cat)
an ArrayAdapter and a Spinner that displays the items
a variable that contains one unknown item from the string array (let's say cat)
I want to set the Spinner to the value from the variable (cat). What's the most elegant solution? I thought about running the string through a loop and comparing the items with the variable (until I hit cat in this example), then use that iteration's # to set the selection of the Spinner, but that seems very convoluted.
Or should I just ditch the Spinner? I looked around and found a solution that uses a button and dialog field: https://stackoverflow.com/a/5790662/1928813
//EDIT: My current code. I want to use "cow" without having to go through the loop, if possible!
final Spinner bSpinner = (Spinner) findViewById(R.id.spinner1);
String[] animals = new String[] { "cat", "bird", "cow", "dog" };
String animal = "cow";
int spinnerpos;
final ArrayAdapter<String> animaladapter = new ArrayAdapter<String>(
this, android.R.layout.simple_spinner_item, animals);
animaladapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
bSpinner.setAdapter(animaladapter);
for (Integer j = 0; j < animals.length; j++) {
if (animals[j].equals(animal)) {
spinnerpos = j;
bSpinner.setSelection(spinnerpos);
} else {
};
}

(Temporarily) convert your String array to a List so you can use indexOf.
int position = Arrays.asList(array).indexOf(randomVariable);
spinner.setSelection(position);
EDIT:
I understand your problem now. If your String array contains all unique values, you can put them in a HashMap for O(1) retrieval:
HashMap<String, Integer> map = new HashMap<String, Integer>();
for (int i = 0; i < animals.length; i++) {
map.put(animals[i], i);
}
String randomAnimal = "cow";
Integer position = map.get(randomAnimal);
if (position != null) bSpinner.setSelection(position);

how to show Selected Value In Spinner using array Adapter?

As i am newbie in android i want to show my saved spinner value at the time of view of saved form
how can i show database saved value at the time of view for spinner
here is my code
Java activity file
Spinner spnAECust;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.ae_view_edit_sales);
spnAECust = (Spinner) findViewById(R.id.spnAECust);
/* Get Customer List and Add Select Default */
cust = con.getAllCustomers();// from database getting list
List<Customer> custList = new ArrayList<Customer>();
Customer c = new Customer();
c.setId(Constants.Common.ZERO);
c.setNm("Select Customer");
custList.add(c);
custList.addAll(cust);
// Create and fill an ArrayAdapter with a bunch of "Customer" objects
ArrayAdapter<Customer> custArrayAdapter = new ArrayAdapter<Customer>(this, android.R.layout.simple_spinner_item,
custList.toArray(new Customer[custList.size()]));
// Tell the spinner about our adapter
spnAECust.setAdapter(custArrayAdapter);
sa = con.getAirSalesActivityDetails(Integer.parseInt(saId));// get details from Sqlite
Customer cust = new Customer();
cust.setId(sa.getCustomerId());
spnAECust.setSelection(custArrayAdapter.getPosition(cust));// to set value saved in db
}
at tried setSelection but it maches index value rather than id value so i get abstract value to b selected please show me correct way to implement ...Thnks in advance

Here i got answer by my own
/* Get Customer List and Add Select Default */
cust = con.getAllCustomers();
List<Customer> custList = new ArrayList<Customer>();
Customer cst = new Customer();
cst.setId(Constants.Common.ZERO);
cst.setNm(Constants.Common.CUSTOMER_HINT);
custList.add(cst);
custList.addAll(cust);
/* Get Commodity List and Add Select Default */
comm = con.getAllCommodities();
List<Commodity> commList = new ArrayList<Commodity>();
Commodity cm = new Commodity();
cm.setId(Constants.Common.ZERO);
cm.setNm(Constants.Common.COMMODITY_HINT);
commList.add(cm);
commList.addAll(comm);
// Create and fill an ArrayAdapter with a bunch of "Customer" objects
ArrayAdapter<Customer> custArrayAdapter = new ArrayAdapter<Customer>(this, android.R.layout.simple_spinner_item,
custList.toArray(new Customer[custList.size()]));
int custIndex = 0;
// to set selected item
for (int r = 0; r < custArrayAdapter.getCount(); r++) {
if (sa.getCustomerId() == custArrayAdapter.getItem(r).getId()) {
custIndex = r;
break;
}
}
// Tell the spinner about our adapter
spnAECust.setAdapter(custArrayAdapter);
spnAECust.setSelection(custIndex);
// Create and fill an ArrayAdapter with a bunch of "Commodities" objects
ArrayAdapter<Commodity> commArrayAdapter = new ArrayAdapter<Commodity>(this, android.R.layout.simple_spinner_item,
commList.toArray(new Commodity[commList.size()]));
int commIndex = 0;
// to set selected item
for (int r = 0; r < commArrayAdapter.getCount(); r++) {
if (sa.getCommodityId() == commArrayAdapter.getItem(r).getId()) {
commIndex = r;
break;
}
}
// Tell the spinner about our adapter
spnAEComodity.setAdapter(commArrayAdapter);
spnAEComodity.setSelection(commIndex);
used for loop to get index for saved value
int commIndex = 0;
// to set selected item
for (int r = 0; r < commArrayAdapter.getCount(); r++) {
if (sa.getCommodityId() == commArrayAdapter.getItem(r).getId()) {
commIndex = r;
break;
}
}
and add index to
spnAEComodity.setSelection(commIndex);

sort array list from second item android

i have a array list for using it in spinner ,i have first value i spinner as title and i want to sort array list from second item in the spinner but i dont know how to do this i am using below trick but it sort whole array list including first item which is title so how to statr sorting from second item...
my code is below...
// this is my title ie. "provincia"
String select2= "Provincia";
if(!estado1.contains(select2)){
estado1.add(select2);
}
for (int i = 0; i < sitesList1.getEstado().size(); i++)
{
if(!estado1.contains(sitesList1.getEstado().get(i)))
{
estado1.add(sitesList1.getEstado().get(i));
Collections.sort(estado1);
}
use below code for show it in spinner...
final ArrayList<String> estado1 = MainMenu.barrio1;
final Spinner estado11 = (Spinner) findViewById(R.id.Spinner04);
ArrayAdapter<String> adapterbarrio = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item, estado1)
estado11.setAdapter(adapterbarrio);

Why not remove the title / only add the title after the list has been sorted?

How about this
List<String> list = new ArrayList<String>();
// Fill list
String title = list.get(0);
list.remove(0);
Collections.sort(list);
list.add(0, title);

One way would be to split the arraylist like
estado1.subList(1,estado1.size()-1);
This would return a sublist excluding your title.

Use bubble sort! and start at index = 1!
final ArrayList<String> estado1;
for(int i=1; i<estado1.size() ; i++) {
for(int c=i; c<estado.size() ; c++) {
if(estado1.get(i).compareTo(estado1.get(c)))
{
String temp = estado1.get(i);
estado1.remove(i);
estado1.add(i, estado1.get(c));
estado1.remove(c);
estado1.add(c, temp);
}
}
}
PS: very bad performance