Custom Spinner Row Layout & Custom Spinner Adapter

The custom spinner adapter is similar to the custom list row & adapter, because we can use LayoutInflater.

(*edit: This code may not run as-is. Therefore, I have included project files associated with this post available for download at the end of this post.)

1) The spinner layout. This is how each row will look when the spinner is selected. In my example there are three text views as three rows.

<LinearLayout
      xmlns:android="http://schemas.android.com/apk/res/android"
      android:layout_width="fill_parent"
      android:layout_height="fill_parent" android:orientation="vertical">
      <TextView
          android:layout_height="wrap_content"
          android:id="@+id/TextView01"
          android:textSize="12px"
          android:layout_width="match_parent"
          android:textColor="#000000">
      </TextView>
      <TextView
          android:layout_height="wrap_content"
          android:id="@+id/TextView02"
          android:layout_width="match_parent"
          android:textSize="12px" android:textColor="#000000"></TextView>
      <TextView
          android:layout_height="wrap_content"
          android:id="@+id/TextView03"
          android:layout_width="match_parent"
          android:textSize="12px"
          android:textColor="#000000">
      </TextView>
</LinearLayout>




2) The custom adapter

// CUSTOM SPINNER ADAPTER
public class MyCustomSpinnerAdapter extends ArrayAdapter<String> {

public MyCustomSpinnerAdapter(Context context, int textViewResourceId,
String[] objects) {
super(context, textViewResourceId, objects);
// TODO Auto-generated constructor stub
}

@Override
public View getDropDownView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
return getCustomView(position, convertView, parent);
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
return getCustomView(position, convertView, parent);
}

public View getCustomView(int position, View convertView,ViewGroup parent) {
// TODO Auto-generated method stub
// return super.getView(position, convertView, parent);

LayoutInflater inflater = getLayoutInflater();

ViewHolder holder;
if (convertView == null) {
convertView = inflater.inflate(R.layout.customspinneritem, null);
holder = new ViewHolder();
holder.txt01 = (TextView) convertView.findViewById(R.id.TextView01);
holder.txt02 = (TextView) convertView.findViewById(R.id.TextView02);
holder.txt03 = (TextView) convertView.findViewById(R.id.TextView03);

convertView.setTag(holder);

} else {

holder = (ViewHolder) convertView.getTag();
}

holder.txt01.setText("Route")
holder.txt02.setText("Strength");
holder.txt03.setText("Form");

return convertView;
}

class ViewHolder {
TextView txt01;
TextView txt02;
TextView txt03;
}

} // end custom adapter

3) Calling the spinner & setting the adapter

Spinner spinner = (Spinner) findViewById(R.id.spinner1);
spinner.setPrompt("Select One");
spinner.setAdapter(new MyCustomSpinnerAdapter(this, 0, items));
spinner.setOnItemSelectedListener(new OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id) {
// your code here
}

@Override
>public void onNothingSelected(AdapterView<?> parentView) {
// your code here
}
});

4) Setting string items

String[] items = { "Route 1, Strength 1, Form 1", "Route 2, Strength 2, Form 2", "Route 3, Strength 3, Form 3" };

Downloads:
main.xml
customspinneritem.xml
CustomSpinnerActivity.java (select "qui")

Resources:
My previous Spinner post
Android Dev Tutorial - Hello Spinner
Custom List Row Layout w/ Adapter