private void renderContact(Uri uri) {
    TextView contactNameView = (TextView) findViewById(R.id.contact_name);
    TextView contactPhoneView = (TextView) findViewById(R.id.contact_phone);
    TextView contactPhotoView = (TextView) findViewById(R.id.contact_photo);

    if (uri == null) {
        contactNameView.setText("Select a contact");
        contactPhoneView.setText("");
        contactPhotoView.setImageBitmap(null);
    } else {
        contactNameView.setText(getDisplayName(uri));
        contactPhoneView.setText(getMobileNumber(uri));
        contactPhotoView.setImageBitmap(getPhoto(uri));    }
}