Custom Spinner using BaseAdapter

Custom Spinner

Here I have implemented custom spinner example using Model class.

Here is my activity_main.xml file

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout 

     xmlns:android="http://schemas.android.com/apk/res/android"    

     xmlns:tools="http://schemas.android.com/tools"    

     android:id="@+id/activity_main"    

     android:layout_width="match_parent"    

     android:layout_height="match_parent"    

     tools:context="example.com.spinnercustom.MainActivity">


    <Spinner        

      android:id="@+id/sprCountry"        

      android:layout_width="match_parent"        

      android:layout_height="wrap_content"/>


</RelativeLayout>

Now we need to create custom layout for spinner.

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout 

  xmlns:android="http://schemas.android.com/apk/res/android"    

  android:orientation="vertical" 

  android:layout_width="match_parent"    

  android:layout_height="match_parent">

    <TextView        

      android:id="@+id/tvCountryName"        

      android:layout_width="wrap_content"        

     android:layout_height="wrap_content" />

</LinearLayout> 

After that we have to create  model class for spinner.

public class SpinnerModel implements Serializable {
    
    private String strCountryName;
    
    public String getStrCountryName() {
        return strCountryName;
    }

    public void setStrCountryName(String strCountryName) {
        this.strCountryName = strCountryName;
    }
}

and the code of MainActivity is given below.

public class MainActivity extends AppCompatActivity {

    private Spinner sprCountry;
    private ArrayList<SpinnerModel> alCountry;
    private SpinnerModel model;
    private SpinnerAdapter adapter;


    @Override    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        sprCountry = (Spinner) findViewById(R.id.sprCountry);

        alCountry = new ArrayList<>();

        model = new SpinnerModel();
        model.setStrCountryName("Select Coutry");
        alCountry.add(model);

        // set First coutry name

        model = new SpinnerModel();
        model.setStrCountryName("INDIA");
        alCountry.add(model);

        model = new SpinnerModel();
        model.setStrCountryName("USA");
        alCountry.add(model);

        model = new SpinnerModel();
        model.setStrCountryName("CANADA");
        alCountry.add(model);


        adapter = new SpinnerAdapter(MainActivity.this,alCountry);
        sprCountry.setAdapter(adapter);

        sprCountry.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override            public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
                Log.e("You select ","=====> "+alCountry.get(i).getStrCountryName());
            }

            @Override            public void onNothingSelected(AdapterView<?> adapterView) {

            }
        });
        
    }
}

and finally I adapter of spinner is

public class SpinnerAdapter extends BaseAdapter {

    private ArrayList<SpinnerModel> alCountry;
    private Context context;
    private LayoutInflater inflater;

    public SpinnerAdapter(MainActivity mainActivity, ArrayList<SpinnerModel> alCountry) {
        context= mainActivity;
        this.alCountry = alCountry;
    }

    @Override    public int getCount() {
        return alCountry.size();
    }

    @Override    public Object getItem(int i) {
        return i;
    }

    @Override    public long getItemId(int i) {
        return i;
    }

    class Holder{
        private TextView tvCountryName;
    }

    @Override    public View getView(int i, View convertView, ViewGroup viewGroup) {
        View myView = null;
        try {
            Holder holder;
            myView = convertView;

            if (myView == null) {
                inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                myView = inflater.inflate(R.layout.spinner_layout, null);

                holder = new Holder();
                holder.tvCountryName = (TextView) myView.findViewById(R.id.tvCountryName);
                myView.setTag(holder);
            } else {
                holder = (Holder) myView.getTag();
            }

            holder.tvCountryName.setText(alCountry.get(i).getStrCountryName());

        } catch (Exception e) {
            e.printStackTrace();
        }

        return myView;
    }

    // Below code is used to hide first item.

    @Override
public View getDropDownView(int position, View convertView, ViewGroup parent) {
    View v = null;
    if (position == intHideIndex) {
        TextView tv = new TextView(context);
        tv.setVisibility(View.GONE);
        tv.setHeight(0);
        v = tv;
        v.setVisibility(View.GONE);
    }
    else        v = super.getDropDownView(position, null, parent);
    return v;

}
}