Selection Controls 2 The spinner Control

The spinner controls is similar to the ComboBox in C#. it displays a list to select from in a popup window so ot may become a better choice over ListView if you want to save space.

It works in a similar way to that of the the listView

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 
 android_orientation="vertical"
 android_layout_width="fill_parent"
 android_layout_height="fill_parent"
 >
 <Spinner
 android_layout_width="fill_parent" 
 android_layout_height="wrap_content"
 android_id="@+id/Spinner"
 />
</LinearLayout>

when you click on the spinner it popups like this:

To handle the selected item you can use do it like this:

final String [] items=new String[]{"Item1","Item2","Item3","Item4"};
 ArrayAdapter ad=new ArrayAdapter(this,android.R.layout.simple_spinner_item,items);
 ad.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
 Spinner spin=(Spinner)findViewById(R.id.Spinner);
 spin.setAdapter(ad);
 spin.setOnItemSelectedListener(new OnItemSelectedListener()
 {

 public void onItemSelected(AdapterView arg0, View arg1,
 int arg2, long arg3) {
 TextView txt=(TextView)findViewById(R.id.txt);
 TextView temp=(TextView)arg1;
 txt.setText(temp.getText());
 
 }

 public void onNothingSelected(AdapterView arg0) {
 // TODO Auto-generated method stub
 
 }
 
 });

The above code displays the selected item text in the textview.

The parameters of the OnItemClick method are:


• Arg0:the Spinner, notice that it is of type AdapterView.

• Arg1: the view that represents the selected item, in this example it will be a TextView

• Arg2: the position of the selected item.

• Arg3: the id of the selected item.

and thats it for the Spinner Control.

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