Android: Create Spinner Programmatically from Array

Android: Create spinner programmatically from array

ArrayAdapter<String> should work.

i.e.:

Spinner spinner = new Spinner(this);
ArrayAdapter<String> spinnerArrayAdapter = new ArrayAdapter<String>
            (this, android.R.layout.simple_spinner_item,
           spinnerArray); //selected item will look like a spinner set from XML
spinnerArrayAdapter.setDropDownViewResource(android.R.layout
                                                     .simple_spinner_dropdown_item);
spinner.setAdapter(spinnerArrayAdapter); 

Create a spinner programmatically in Android

You need to add the Spinner to a layout.

First create a container for the Spinner and then create the Spinner and add it to your container. Next set content of you Activity to your container.

This could be done like this, in your onCreate method:

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_my);

    LinearLayout layout = new LinearLayout(this);

    ArrayList<String> spinnerArray = new ArrayList<String>();
    spinnerArray.add("one");
    spinnerArray.add("two");
    spinnerArray.add("three");
    spinnerArray.add("four");
    spinnerArray.add("five");

    Spinner spinner = new Spinner(this);
    ArrayAdapter<String> spinnerArrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_dropdown_item, spinnerArray);
    spinner.setAdapter(spinnerArrayAdapter);

    layout.addView(spinner);

    setContentView(layout);
}

EDIT:

Just to clarify: if the Spinner isn't added to the content of the Activity inside a layout, it isn't visible, so that's why you don't get any errors or anything, because there isn't any errors in your code, per se ;-)

android spinner and array adapter programmatically

Just create a custom ArrayAdapter and define how the spinner textview should look in that getDropDownView method of the adapter

public class CustomizedSpinnerAdapter extends ArrayAdapter<String> {

 private Activity context;
 String[] data = null;

 public CustomizedSpinnerAdapter(Activity context, int resource, String[] data2)
 {
     super(context, resource, data2);
     this.context = context;
     this.data = data2;
 }
  ...

 @Override
 public View getDropDownView(int position, View convertView, ViewGroup parent)
 {   
     View row = convertView;
     if(row == null)
     {
         //inflate your customlayout for the textview
         LayoutInflater inflater = context.getLayoutInflater();
         row = inflater.inflate(R.layout.spinner_layout, parent, false);
     }
     //put the data in it
     String item = data[position];
     if(item != null)
     {   
        TextView text1 = (TextView) row.findViewById(R.id.rowText);
        text1.setTextColor(Color.WHITE);
        text1.setText(item);
     }

     return row;
 }
...
}

and set this adapter for the spinner

Spinner mySpinner = (Spinner) findViewById(R.id.mySpinner);
final String[] data = getResources().getStringArray(
            R.array.data);
final ArrayAdapter<String> adapter1 = new CustomizedSpinnerAdapter(
            AddSlaveActivity.this, android.R.layout.simple_spinner_item,
            data);
mySpinner.setAdapter(adapter1); 

How to programatically set entries of spinner in android?

You need to use an adapter and populate with tha array in xml file.

Specify the name of your array in xml at createFromResource method (second parameter).

ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this, R.array.my_array, android.R.layout.simple_spinner_item);   
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
mySpinner.setAdapter(adapter);

How to populate a Spinner from String array

Use ArrayAdapter this way

your string array

   String[] test=new String[]{"test1","test2"};

your ArrayAdapter

   ArrayAdapter<String> gameKindArray= new ArrayAdapter<String>(MyActivityClass.this,android.R.layout.simple_spinner_item, test);
   gameKindArray.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
   gameKind.setAdapter(gameKindArray); 

Create Spinner Programmatically

In your onItemSelected:

@Override
public void onItemSelected(AdapterView<?> parentview, View v,int position, long id)
{
    Log.d("in select","yes");
}

The position helps you to retrieve your selected item. Which, in your case, it should be:

option[position]

fill spinner android studio programmatically

The second argument of the ArrayAdapter constructor should be an int not a Spinner

Example call:

Spinner spinner = new Spinner(this);
ArrayAdapter<String> spinnerArrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, spinnerArray); //selected item will look like a spinner set from XML
spinnerArrayAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(spinnerArrayAdapter);

For more information on the possible constructor arguments see:
https://developer.android.com/reference/android/widget/ArrayAdapter.html

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