import com.rey.material.widget.Spinner; //导入依赖的package包/类
@TargetApi(Build.VERSION_CODES.HONEYCOMB)
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
	View v = inflater.inflate(R.layout.fragment_spinner, container, false);

       Spinner spn_label = (Spinner)v.findViewById(R.id.spinner_label);
       Spinner spn_no_arrow = (Spinner)v.findViewById(R.id.spinner_no_arrow);
	String[] items = new String[20];
	for(int i = 0; i < items.length; i++)
		items[i] = "Item " + String.valueOf(i + 1);
       ArrayAdapter<String> adapter = new ArrayAdapter<>(getActivity(), R.layout.row_spn, items);
       adapter.setDropDownViewResource(R.layout.row_spn_dropdown);
       spn_label.setAdapter(adapter);
       spn_no_arrow.setAdapter(adapter);

	return v;
}
 

import com.rey.material.widget.Spinner; //导入依赖的package包/类
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_email_settings);

    emailField = (EditText) findViewById(R.id.email);
    labelField = (EditText) findViewById(R.id.label);

    ImageButton reloadBtn = (ImageButton) findViewById(R.id.reload_btn);
    reloadBtn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            geretateRandomString();
        }
    });

    domains = (Spinner) findViewById(R.id.domains);
    ArrayList<String> items = new ArrayList<String>();
    items.add("@alpha.randomail.net");
    if (RandomailApplication.user != null) {
        for (String domain : RandomailApplication.user.domains) {
            items.add(domain);
        }
    }
    ArrayAdapter<String> adapter = new ArrayAdapter<String>(ctx, android.R.layout.simple_list_item_1, items);
    domains.setAdapter(adapter);

    com.rey.material.widget.Button createAlias = (com.rey.material.widget.Button) findViewById(R.id.create_alias);
    createAlias.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            createAlias();
        }
    });

}