If generated programmatically in Android 2.0, Android spinner does not render correctly

This code is written in Spinner's layout / XML file:

<Spinner
  android:id="@+id/planets_spinner"
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:entries="@array/planets_array" />

Java code in oncreate (bundle savedinstancestate) {} in mainactivity.java:

ArrayList<String> spinnerArray = new ArrayList<String>();
    spinnerArray.add("one");
    spinnerArray.add("Jupiter");
    spinnerArray.add("Mercury");
    spinnerArray.add("Venus");
    spinnerArray.add("Earth");

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

spinner.setAdapter(spinnerArrayAdapter);

How can it go wrong?

resolvent:

You are using the wrong resource... The checkable style you are using is only applicable to drop-down resources

The following should work (note that simple_spinner_dropdown_item! = simple_spinner_item):

ArrayAdapter<String> spinnerArrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, spinnerArray);
spinnerArrayAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);