How can I see a value on the spinner?

My question is: I am using spinner on my android app. However, I can't see the default value shown on the spinner, at all. I can select elements but I can't see any text on the spinner. It seems like the value is hidden and doesn't show anything, just the spinner itself and drop down arrow.

mDbHelper = new DbAdapter(this);
    mDbHelper.open();
    cursor = mDbHelper.fetchAllBusinessCards();
    startManagingCursor(cursor);
    contactSpinner = (Spinner) findViewById(R.id.contactSpinner);

    contactSpinner.setOnItemSelectedListener(new MyOnItemSelectedListener());
    fillData();


}
public class MyOnItemSelectedListener implements OnItemSelectedListener {

    public void onItemSelected(AdapterView<?> parent,
        View view, int pos, long id) {
      Toast.makeText(parent.getContext(), "The planet is " +
          parent.getItemAtPosition(pos).toString(), Toast.LENGTH_LONG).show();
    }

    public void onNothingSelected(AdapterView parent) {
      // Do nothing.
    }
}

private void fillData() {



/*Create an array to specify the fields we want to display in the list (only the 'colourName' column in this case) */

String[] from = new String[]{DbAdapter.getKeyTitle() }; 
/* and an array of the fields we want to bind those fields to (in this case just the textView 'tvDBViewRow' from our new db_view_row.xml layout above) */
int[] to = new int[]{R.id.tvDBViewRow};

/* Now create a simple cursor adapter.. */ 
SimpleCursorAdapter colourAdapter =
new SimpleCursorAdapter(this,R.layout.db_view_row, cursor, from, to);

/* and assign it to our Spinner widget */ 
contactSpinner.setAdapter(colourAdapter);
//contactSpinner.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
contactSpinner.setSelection(0);

}

@开发者_运维知识库Override
protected void onDestroy() {
    super.onDestroy();
    if (mDbHelper != null) {
        mDbHelper.close();
    }
}

}

You can call spinner.setSelection to set the current state of the spinner to whatever you want. And that definitely works

spinner.setSelection(0);

but you must also call setDropDownViewResource()

let say

adapter.setDropDownViewResource(
android.R.layout.simple_spinner_dropdown_item);